JRE fatal error due to threadlock between VM Thread and my threads

Schweizer Jonas (M.) jonas.schweizer at polytechnique.edu
Wed Nov 11 16:24:10 UTC 2020


Hi everyone, 





I'm having an issue of threadlocks with the garbage collector of OpenJDK 11.0.8 and I posted a message on Stackoverflow. Someone encouraged me to post on this mailing list, in order to get the advice of very proficient Java people. 

I'm currently coding a java application that simulate a process. Each process is sending a lot of UDP packets to other process, simulating many machines broadcasting to each others. Each process is using many different threads, and I took care of the synchronization sometimes by myself (class with only synchronized methods) and sometimes by java classes (synchronizedSet and maps). 

I'm working on Java 11 with OpenJDK (the requirement of my project is in this version) and I'm getting some strange JRE fatal errors. I was able to reduce the frequency of those errors by using the SerialGC. From what I'm reading, there seems to be a deadlock between the VM Thread (which is I suppose the garbage collector thread) and one of my threads (which is, in the case of this crash, a thread woken up by a timer to resend a UDP packet if the Ack has not been received). 

(full error log is at the end of this email) 



I never have deadlocks between my threads, but often between the GC and my threads. I did not find any way to completely stop all my threads during garbage collection, so I don't know how to prevent the GC to deadlock with my other threads. 




Does anyone already faced something like this, and how did you solve it? Is it a bug of the JDK, and is there a way to overcome this? 




Thanks a lot, 

Jonas Schweizer 

Error log: 
# 
# A fatal error has been detected by the Java Runtime Environment: 
# 
# SIGSEGV (0xb) at pc=0x00007f33371230a7, pid= 8096 , tid= 8098 
# 
# JRE version: OpenJDK Runtime Environment ( 11 . 0 . 8 + 10 ) (build 11 . 0 . 8 + 10 - post-Ubuntu-0ubuntu118.04.1 ) 
# Java VM: OpenJDK 64-B it Server VM ( 11 . 0 . 8 + 10 - post-Ubuntu-0ubuntu118.04.1 , mixed mode, sharing, tiered, compressed oops, serial gc, linux-amd64) 
# Problematic frame: 
# V [ libjvm.so +0x65c0a7] 
# 
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %d %P %E" (or dumping to /home/dcl/Documents/project/CS 451-2020 -project/template_java/core. 8096 ) 
# 
# If you would like to submit a bug report, please visit: 
# https://bugs.launchpad.net/ubuntu/+source/openjdk-lts 
# 

--------------- S U M M A R Y ------------ 

Command Line: -XX:+UseSerialGC -Xms2g /home/dcl/Documents/project/CS 451-2020 -project/template_java/bin/da_proc.jar --id 1 --hosts hosts.txt --barrier 0 . 0 . 0 . 0:10000 --signal 0 . 0 . 0 . 0:11000 --output outputs/ 1 .txt config 

Host: Intel(R) Core(TM) i 7-9750 H CPU @ 2 .60GHz, 6 cores, 3G, Ubuntu 18 . 04 . 5 LTS 
Time: Wed Nov 11 13:45:38 2020 CET elapsed time: 36 seconds (0d 0h 0m 36s) 

--------------- T H R E A D --------------- 

Current thread (0x00007f33300b5000): VMThread "VM Thread" [stack: 0x00007f33344f2000,0x00007f33345f2000] [id= 8098 ] 

Stack: [0x00007f33344f2000,0x00007f33345f2000], sp=0x00007f33345efcc0, free space=1015k 
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code) 
V [ libjvm.so +0x65c0a7] 
V [ libjvm.so +0x65cc6c] 
V [ libjvm.so +0x6585b0] 
V [ libjvm.so +0x658b25] 
V [ libjvm.so +0x7b0767] 
V [ libjvm.so +0x7b10f6] 
V [ libjvm.so +0x7b2048] 
V [ libjvm.so +0xdf9bef] 
V [ libjvm.so +0xdfb1e8] 
V [ libjvm.so +0xe01396] 
V [ libjvm.so +0xe018a0] 
V [ libjvm.so +0xe01d23] 
V [ libjvm.so +0xd860bf] 
V [ libjvm.so +0xbd632e] 


siginfo: si_signo: 11 (SIGSEGV), si_code: 128 (SI_KERNEL), si_addr: 0x0000000000000000 

Register to memory mapping: 

RAX=0x353b343433313038 is an unknown value 
RBX= 
[error occurred during error reporting (printing register info), id 0xb, SIGSEGV (0xb) at pc=0x00007f3337792aee] 

Registers: 
RAX=0x353b343433313038, RBX=0x0000000093c00380, RCX=0x000000000000001c, RDX=0x000000000000001c 
RSP=0x00007f33345efcc0, RBP=0x00007f33345efd30, RSI=0x00000000fffffff8, RDI=0x0000000000000000 
R8 =0x00000008002ddf38, R9 =0x0000000093c00380, R10=0x00000000a35a68a8, R11=0x00007f333002a270 
R12=0x00000000a266a790, R13=0x00007f3337e80f20, R14=0x00000000a266a79c, R15=0x00007f33345eff00 
RIP=0x00007f33371230a7, EFLAGS=0x0000000000010202, CSGSFS=0x002b000000000033, ERR=0x0000000000000000 
TRAPNO=0x000000000000000d 

Top of Stack: (sp=0x00007f33345efcc0) 
0x00007f33345efcc0: 00007f33345efd30 0000000336fe3b15 
0x00007f33345efcd0: 0000000094437398 00000000a266a780 
0x00007f33345efce0: 00000008002ddf40 00007f333002a270 
0x00007f33345efcf0: 0000000000000003 00000008002ddf38 

Instructions: (pc=0x00007f33371230a7) 
0x00007f3337122fa7: 00 4c 89 45 c8 0f 1f 40 00 41 8b 1c 24 85 db 74 
0x00007f3337122fb7: 78 4c 8d 2d 61 df d5 00 41 8b 4d 08 49 8b 45 00 
0x00007f3337122fc7: 48 d3 e3 48 01 c3 49 3b 5f 40 49 89 d9 73 5a 48 
0x00007f3337122fd7: 8b 13 83 e2 03 48 83 fa 03 75 7e 48 8d 35 ef 3e 
0x00007f3337122fe7: d4 00 48 8b 13 80 3e 00 74 0e 48 89 d6 31 db 83 
0x00007f3337122ff7: e6 07 48 83 fe 05 74 07 48 83 e2 fc 48 89 d3 48 
0x00007f3337123007: 29 c3 48 d3 eb 41 89 1c 24 49 8b 47 30 48 85 c0 
0x00007f3337123017: 0f 84 f3 00 00 00 80 78 22 00 75 0d c6 40 22 01 
0x00007f3337123027: 66 0f 1f 84 00 00 00 00 00 49 83 c4 04 4d 39 e6 
0x00007f3337123037: 0f 87 73 ff ff ff 4c 8b 45 c8 49 83 c0 08 4c 39 
0x00007f3337123047: 45 b0 0f 87 41 ff ff ff 48 83 c4 48 5b 41 5c 41 
0x00007f3337123057: 5d 41 5e 41 5f 5d c3 66 90 48 8d 05 a5 a7 d8 00 
0x00007f3337123067: 4d 8b 5f 38 0f b6 00 84 c0 0f 85 52 01 00 00 48 
0x00007f3337123077: 8b 7b 08 8b 57 08 83 fa 00 0f 8e 61 01 00 00 f6 
0x00007f3337123087: c2 01 0f 85 a1 02 00 00 c1 fa 03 48 8b 03 48 63 
0x00007f3337123097: ca a8 01 48 8b 03 0f 85 ad 00 00 00 48 83 e0 fd 
0x00007f33371230a7: 48 8b 00 48 c1 e8 03 83 e0 0f 41 39 83 00 01 00 
0x00007f33371230b7: 00 0f 87 a6 00 00 00 49 8b bb f8 00 00 00 4c 89 
0x00007f33371230c7: 4d b8 48 89 ca 4c 89 5d c0 48 89 de 48 8b 07 ff 
0x00007f33371230d7: 90 00 01 00 00 48 85 c0 49 89 c2 4c 8b 5d c0 4c 
0x00007f33371230e7: 8b 4d b8 0f 84 b0 02 00 00 4c 89 d0 4c 89 d3 48 
0x00007f33371230f7: 83 c8 03 49 89 01 41 8b 4d 08 49 8b 45 00 e9 fc 
0x00007f3337123107: fe ff ff 66 0f 1f 44 00 00 41 80 7f 48 00 0f 84 
0x00007f3337123117: 15 ff ff ff 41 8b 4d 08 89 db 48 d3 e3 49 03 5d 
0x00007f3337123127: 00 49 39 5f 20 0f 86 fe fe ff ff 49 8b 57 28 4c 
0x00007f3337123137: 89 e0 48 c1 e8 09 48 8b 52 48 c6 04 02 11 e9 e6 
0x00007f3337123147: fe ff ff 66 0f 1f 44 00 00 48 c1 e8 03 83 e0 0f 
0x00007f3337123157: 41 39 83 00 01 00 00 0f 86 5a ff ff ff 49 8b bb 
0x00007f3337123167: f8 02 00 00 48 89 ce 89 55 9c 4c 89 4d a0 4c 89 
0x00007f3337123177: 5d b8 48 89 4d c0 e8 3e 1d 67 00 48 85 c0 49 89 
0x00007f3337123187: c2 48 8b 4d c0 4c 8b 5d b8 4c 8b 4d a0 8b 55 9c 
0x00007f3337123197: 0f 84 21 ff ff ff 48 8d 05 d4 33 d4 00 48 8b 00 


Stack slot to memory mapping: 
stack at sp + 0 slots: 0x00007f33345efd30 points into unknown readable memory: 90 fd 5e 34 33 7f 00 00 
stack at sp + 1 slots: 0x0000000336fe3b15 is an unknown value 
stack at sp + 2 slots: 
[error occurred during error reporting (inspecting top of stack), id 0xb, SIGSEGV (0xb) at pc=0x00007f3337792aee] 

VM_Operation (0x00007f330ae9a460): GenCollectForAllocation, mode: safepoint, requested by thread 0x00007f333021f000 


--------------- P R O C E S S --------------- 

Threads class SMR info: 
_java_thread_list=0x00007f32c44f9210, length= 17 , elements={ 
0x00007f3330016000, 0x00007f33300b8000, 0x00007f33300ba000, 0x00007f33300c1800, 
0x00007f33300c3800, 0x00007f33300c5800, 0x00007f33300c7800, 0x00007f3330102800, 
0x00007f3330108000, 0x00007f33301ff800, 0x00007f3330217000, 0x00007f333021a000, 
0x00007f333021b800, 0x00007f333021f000, 0x00007f3330220000, 0x00007f3330226800, 
0x00007f3330228800 
} 

Java Threads: ( => current thread ) 
0x00007f3330016000 JavaThread "CUSTOM_main_sender_thread" [_thread_blocked, id= 8097 , stack(0x00007f3338c41000,0x00007f3338d42000)] 
0x00007f33300b8000 JavaThread "Reference Handler" daemon [_thread_blocked, id= 8099 , stack(0x00007f33343ef000,0x00007f33344f0000)] 
0x00007f33300ba000 JavaThread "Finalizer" daemon [_thread_blocked, id= 8100 , stack(0x00007f33342ee000,0x00007f33343ef000)] 
0x00007f33300c1800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id= 8101 , stack(0x00007f33341ed000,0x00007f33342ee000)] 
0x00007f33300c3800 JavaThread "C2 CompilerThread0" daemon [_thread_blocked, id= 8102 , stack(0x00007f33340ec000,0x00007f33341ed000)] 
0x00007f33300c5800 JavaThread "C1 CompilerThread0" daemon [_thread_blocked, id= 8103 , stack(0x00007f3318001000,0x00007f3318102000)] 
0x00007f33300c7800 JavaThread "Sweeper thread" daemon [_thread_blocked, id= 8104 , stack(0x00007f330bbcf000,0x00007f330bcd0000)] 
0x00007f3330102800 JavaThread "Service Thread" daemon [_thread_blocked, id= 8105 , stack(0x00007f330bace000,0x00007f330bbcf000)] 
0x00007f3330108000 JavaThread "Common-Cleaner" daemon [_thread_blocked, id= 8107 , stack(0x00007f330b8cb000,0x00007f330b9cc000)] 
0x00007f33301ff800 JavaThread "CUSTOM_gc_process_timer" [_thread_blocked, id= 8150 , stack(0x00007f330b19f000,0x00007f330b2a0000)] 
0x00007f3330217000 JavaThread "CUSTOM_gc_transport_timer" [_thread_blocked, id= 8161 , stack(0x00007f330b09e000,0x00007f330b19f000)] 
0x00007f333021a000 JavaThread "CUSTOM_gc_ublayer_timer" [_thread_blocked, id= 8163 , stack(0x00007f330af9d000,0x00007f330b09e000)] 
0x00007f333021b800 JavaThread "CUSTOM_ping_sender_timer" [_thread_blocked, id= 8164 , stack(0x00007f330ae9c000,0x00007f330af9d000)] 
0x00007f333021f000 JavaThread "CUSTOM_resending_transport_0_timer" [_thread_blocked, id= 8167 , stack(0x00007f330ad9b000,0x00007f330ae9c000)] 
0x00007f3330220000 JavaThread "CUSTOM__sender_thread" [_thread_blocked, id= 8169 , stack(0x00007f330ac9a000,0x00007f330ad9b000)] 
0x00007f3330226800 JavaThread "CUSTOM_udp_receiver_thread" [_thread_blocked, id= 8170 , stack(0x00007f330ab99000,0x00007f330ac9a000)] 
0x00007f3330228800 JavaThread "CUSTOM_handler_receiver_thread" [_thread_blocked, id= 8171 , stack(0x00007f330aa98000,0x00007f330ab99000)] 

Other Threads: 
=>0x00007f33300b5000 VMThread "VM Thread" [stack: 0x00007f33344f2000,0x00007f33345f2000] [id= 8098 ] 
0x00007f3330105000 WatcherThread [stack: 0x00007f330b9ce000,0x00007f330bace000] [id= 8106 ] 

Threads with active compile tasks: 

VM stat e:a t safepoint (normal execution) 

VM Mutex/Monitor currently owned by a thread: ([mutex/lock_event]) 
[0x00007f33300125b0] Threads_lock - owner thread: 0x00007f33300b5000 
[0x00007f3330012d90] Heap_lock - owner thread: 0x00007f333021f000 

Heap address: 0x0000000080000000, size: 2048 MB, Compressed Oops mode: 32-b it 
Narrow klass base: 0x0000000800000000, Narrow klass shift: 3 
Compressed class space size: 1073741824 Address: 0x0000000840000000 

Heap: 
def new generation total 629120K, used 624392K [0x0000000080000000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
eden space 559232K, 100 % used [0x0000000080000000, 0x00000000a2220000, 0x00000000a2220000) 
from space 69888K, 93 % used [0x00000000a6660000, 0x00000000aa602320, 0x00000000aaaa0000) 
to space 69888K, 28 % used [0x00000000a2220000, 0x00000000a35a68c0, 0x00000000a6660000) 
tenured generation total 1398144K, used 251583K [0x00000000aaaa0000, 0x0000000100000000, 0x0000000100000000) 
the space 1398144K, 17 % used [0x00000000aaaa0000, 0x00000000ba04fdb0, 0x00000000ba04fe00, 0x0000000100000000) 
Metaspace used 2965K, capacity 5555K, committed 5632K, reserved 1056768K 
class space used 358K, capacity 713K, committed 768K, reserved 1048576K 

Card table byte_map: [0x00007f333491e000,0x00007f3334d1f000] _byte_map_base: 0x00007f333451e000 

Polling page: 0x00007f3338d56000 

Metaspace: 

Usage: 
Non-class: 4 . 73 MB capacity, 2 . 55 MB ( 54 %) used, 2 . 15 MB ( 45 %) free+waste, 33 . 00 KB ( < 1 %) overhead. 
Class: 713 . 00 KB capacity, 358 . 59 KB ( 50 %) used, 336 . 03 KB ( 47 %) free+waste, 18 . 38 KB ( 3 %) overhead. 
Both: 5 . 42 MB capacity, 2 . 90 MB ( 53 %) used, 2 . 48 MB ( 46 %) free+waste, 51 . 38 KB ( < 1 %) overhead. 

Virtual space: 
Non-class space: 8 . 00 MB reserved, 4 . 75 MB ( 59 %) committed 
Class space: 1 . 00 GB reserved, 768 . 00 KB ( < 1 %) committed 
Both: 1 . 01 GB reserved, 5 . 50 MB ( < 1 %) committed 

Chunk freelists: 
Non-Class: 0 bytes 
Class: 0 bytes 
Both: 0 bytes 

MaxMetaspaceSize: unlimited 
CompressedClassSpaceSize: 1 . 00 GB 

CodeHeap 'non-profiled nmethods' : size=120032Kb used=924Kb max_used=924Kb free=119107Kb 
bounds [0x00007f33203ca000, 0x00007f332063a000, 0x00007f3327902000] 
CodeHeap 'profiled nmethods' : size=120032Kb used=2105Kb max_used=2105Kb free=117926Kb 
bounds [0x00007f3318e92000, 0x00007f3319102000, 0x00007f33203ca000] 
CodeHeap 'non-nmethods' : size=5696Kb used=1101Kb max_used=1138Kb free=4595Kb 
bounds [0x00007f3318902000, 0x00007f3318b72000, 0x00007f3318e92000] 
total_blobs= 1683 nmethods= 1241 adapters= 358 
compilation: enabled 
stopped_count= 0 , restarted_count= 0 
full_count= 0 

Compilation events ( 20 events): 
Event: 31 . 913 Thread 0x00007f33300c5800 1234 %s 3 cs451.layers.UBLayer ::garbageCollect @ 190 ( 274 bytes) 
Event: 31 . 916 Thread 0x00007f33300c5800 nmethod 1234 % 0x00007f3319097610 code [0x00007f3319097ca0, 0x00007f331909c1c0] 
Event: 31 . 918 Thread 0x00007f33300c3800 1235 ! 4 java.util.Collections $SynchronizedMap::remove ( 25 bytes) 
Event: 31 . 924 Thread 0x00007f33300c3800 nmethod 1235 0x00007f33204af510 code [0x00007f33204af6c0, 0x00007f33204afb68] 
Event: 31 . 929 Thread 0x00007f33300c3800 1236 %s 4 cs451.layers.UBLayer ::garbageCollect @ 190 ( 274 bytes) 
Event: 31 . 935 Thread 0x00007f33300c5800 1238 3 java.lang.StackStreamFactory $StackFrameTraverser::nextStackFrame ( 32 bytes) 
Event: 31 . 936 Thread 0x00007f33300c5800 nmethod 1238 0x00007f331909d710 code [0x00007f331909d900, 0x00007f331909dd50] 
Event: 31 . 936 Thread 0x00007f33300c5800 1237 3 java.lang.StackStreamFactory $StackFrameTraverser::tryAdvance ( 114 bytes) 
Event: 31 . 936 Thread 0x00007f33300c5800 nmethod 1237 0x00007f331909de90 code [0x00007f331909e0c0, 0x00007f331909e820] 
Event: 31 . 936 Thread 0x00007f33300c5800 1239 3 java.lang.StackStreamFactory ::isReflectionFrame ( 48 bytes) 
Event: 31 . 936 Thread 0x00007f33300c5800 nmethod 1239 0x00007f331909ea90 code [0x00007f331909eca0, 0x00007f331909f0f0] 
Event: 31 . 962 Thread 0x00007f33300c3800 nmethod 1236 % 0x00007f33204afe10 code [0x00007f33204affe0, 0x00007f33204b09a8] 
Event: 31 . 965 Thread 0x00007f33300c5800 1240 3 java.util.regex.Pattern $BmpCharPredicate$$Lambda$ 25 /0x0000000840093840::is ( 13 bytes) 
Event: 31 . 965 Thread 0x00007f33300c5800 nmethod 1240 0x00007f331909f290 code [0x00007f331909f480, 0x00007f331909f8b0] 
Event: 31 . 965 Thread 0x00007f33300c5800 1241 3 java.util.regex.Pattern $BmpCharPredicate::lambda$union$ 2 ( 26 bytes) 
Event: 31 . 965 Thread 0x00007f33300c5800 nmethod 1241 0x00007f331909fa10 code [0x00007f331909fbe0, 0x00007f331909ff30] 
Event: 32 . 637 Thread 0x00007f33300c3800 1242 4 java.util.HashMap ::put ( 13 bytes) 
Event: 32 . 639 Thread 0x00007f33300c3800 nmethod 1242 0x00007f33204b0f90 code [0x00007f33204b1140, 0x00007f33204b1268] 
Event: 33 . 130 Thread 0x00007f33300c5800 1243 3 java.util.LinkedList $ListItr::<init> ( 47 bytes) 
Event: 33 . 131 Thread 0x00007f33300c5800 nmethod 1243 0x00007f33190a0010 code [0x00007f33190a01e0, 0x00007f33190a0440] 

GC Heap History ( 7 events): 
Event: 8 . 747 GC heap before 
{Heap before GC invocations= 0 (full 0 ): 
def new generation total 629120K, used 559232K [0x0000000080000000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
eden space 559232K, 100 % used [0x0000000080000000, 0x00000000a2220000, 0x00000000a2220000) 
from space 69888K, 0 % used [0x00000000a2220000, 0x00000000a2220000, 0x00000000a6660000) 
to space 69888K, 0 % used [0x00000000a6660000, 0x00000000a6660000, 0x00000000aaaa0000) 
tenured generation total 1398144K, used 0K [0x00000000aaaa0000, 0x0000000100000000, 0x0000000100000000) 
the space 1398144K, 0 % used [0x00000000aaaa0000, 0x00000000aaaa0000, 0x00000000aaaa0200, 0x0000000100000000) 
Metaspace used 2831K, capacity 5554K, committed 5632K, reserved 1056768K 
class space used 350K, capacity 713K, committed 768K, reserved 1048576K 
} 
Event: 8 . 992 GC heap after 
{Heap after GC invocations= 1 (full 0 ): 
def new generation total 629120K, used 69888K [0x0000000080000000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
eden space 559232K, 0 % used [0x0000000080000000, 0x0000000080000000, 0x00000000a2220000) 
from space 69888K, 100 % used [0x00000000a6660000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
to space 69888K, 0 % used [0x00000000a2220000, 0x00000000a2220000, 0x00000000a6660000) 
tenured generation total 1398144K, used 101635K [0x00000000aaaa0000, 0x0000000100000000, 0x0000000100000000) 
the space 1398144K, 7 % used [0x00000000aaaa0000, 0x00000000b0de0cf0, 0x00000000b0de0e00, 0x0000000100000000) 
Metaspace used 2831K, capacity 5554K, committed 5632K, reserved 1056768K 
class space used 350K, capacity 713K, committed 768K, reserved 1048576K 
} 
Event: 16 . 382 GC heap before 
{Heap before GC invocations= 1 (full 0 ): 
def new generation total 629120K, used 629120K [0x0000000080000000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
eden space 559232K, 100 % used [0x0000000080000000, 0x00000000a2220000, 0x00000000a2220000) 
from space 69888K, 100 % used [0x00000000a6660000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
to space 69888K, 0 % used [0x00000000a2220000, 0x00000000a2220000, 0x00000000a6660000) 
tenured generation total 1398144K, used 101635K [0x00000000aaaa0000, 0x0000000100000000, 0x0000000100000000) 
the space 1398144K, 7 % used [0x00000000aaaa0000, 0x00000000b0de0cf0, 0x00000000b0de0e00, 0x0000000100000000) 
Metaspace used 2840K, capacity 5554K, committed 5632K, reserved 1056768K 
class space used 350K, capacity 713K, committed 768K, reserved 1048576K 
} 
Event: 16 . 790 GC heap after 
{Heap after GC invocations= 2 (full 0 ): 
def new generation total 629120K, used 69888K [0x0000000080000000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
eden space 559232K, 0 % used [0x0000000080000000, 0x0000000080000000, 0x00000000a2220000) 
from space 69888K, 100 % used [0x00000000a2220000, 0x00000000a6660000, 0x00000000a6660000) 
to space 69888K, 0 % used [0x00000000a6660000, 0x00000000a6660000, 0x00000000aaaa0000) 
tenured generation total 1398144K, used 175901K [0x00000000aaaa0000, 0x0000000100000000, 0x0000000100000000) 
the space 1398144K, 12 % used [0x00000000aaaa0000, 0x00000000b5667538, 0x00000000b5667600, 0x0000000100000000) 
Metaspace used 2840K, capacity 5554K, committed 5632K, reserved 1056768K 
class space used 350K, capacity 713K, committed 768K, reserved 1048576K 
} 
Event: 24 . 098 GC heap before 
{Heap before GC invocations= 2 (full 0 ): 
def new generation total 629120K, used 629120K [0x0000000080000000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
eden space 559232K, 100 % used [0x0000000080000000, 0x00000000a2220000, 0x00000000a2220000) 
from space 69888K, 100 % used [0x00000000a2220000, 0x00000000a6660000, 0x00000000a6660000) 
to space 69888K, 0 % used [0x00000000a6660000, 0x00000000a6660000, 0x00000000aaaa0000) 
tenured generation total 1398144K, used 175901K [0x00000000aaaa0000, 0x0000000100000000, 0x0000000100000000) 
the space 1398144K, 12 % used [0x00000000aaaa0000, 0x00000000b5667538, 0x00000000b5667600, 0x0000000100000000) 
Metaspace used 2944K, capacity 5554K, committed 5632K, reserved 1056768K 
class space used 358K, capacity 713K, committed 768K, reserved 1048576K 
} 
Event: 24 . 686 GC heap after 
{Heap after GC invocations= 3 (full 0 ): 
def new generation total 629120K, used 65160K [0x0000000080000000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
eden space 559232K, 0 % used [0x0000000080000000, 0x0000000080000000, 0x00000000a2220000) 
from space 69888K, 93 % used [0x00000000a6660000, 0x00000000aa602320, 0x00000000aaaa0000) 
to space 69888K, 0 % used [0x00000000a2220000, 0x00000000a2220000, 0x00000000a6660000) 
tenured generation total 1398144K, used 239796K [0x00000000aaaa0000, 0x0000000100000000, 0x0000000100000000) 
the space 1398144K, 17 % used [0x00000000aaaa0000, 0x00000000b94cd050, 0x00000000b94cd200, 0x0000000100000000) 
Metaspace used 2944K, capacity 5554K, committed 5632K, reserved 1056768K 
class space used 358K, capacity 713K, committed 768K, reserved 1048576K 
} 
Event: 35 . 785 GC heap before 
{Heap before GC invocations= 3 (full 0 ): 
def new generation total 629120K, used 624392K [0x0000000080000000, 0x00000000aaaa0000, 0x00000000aaaa0000) 
eden space 559232K, 100 % used [0x0000000080000000, 0x00000000a2220000, 0x00000000a2220000) 
from space 69888K, 93 % used [0x00000000a6660000, 0x00000000aa602320, 0x00000000aaaa0000) 
to space 69888K, 0 % used [0x00000000a2220000, 0x00000000a2220000, 0x00000000a6660000) 
tenured generation total 1398144K, used 239796K [0x00000000aaaa0000, 0x0000000100000000, 0x0000000100000000) 
the space 1398144K, 17 % used [0x00000000aaaa0000, 0x00000000b94cd050, 0x00000000b94cd200, 0x0000000100000000) 
Metaspace used 2965K, capacity 5555K, committed 5632K, reserved 1056768K 
class space used 358K, capacity 713K, committed 768K, reserved 1048576K 
} 

Deoptimization events ( 20 events): 
Event: 30 . 817 Thread 0x00007f3330228800 DEOPT PACKING pc=0x00007f33204885bc sp=0x00007f330ab97770 
Event: 30 . 817 Thread 0x00007f3330228800 DEOPT UNPACKING pc=0x00007f331892731f sp=0x00007f330ab976a0 mode 2 
Event: 30 . 963 Thread 0x00007f3330228800 Uncommon trap: trap_request=0xffffffc6 fr.pc =0x00007f3320431198 relative=0x0000000000000a98 
Event: 30 . 967 Thread 0x00007f3330228800 Uncommon trap: reason=bimorphic_or_optimized_type_check action=maybe_recompile pc=0x00007f3320431198 method= java.util.HashMap.getNode (ILjava/lang/Object;)Ljava/util/HashMap$Node; @ 126 c2 
Event: 30 . 967 Thread 0x00007f3330228800 DEOPT PACKING pc=0x00007f3320431198 sp=0x00007f330ab97790 
Event: 30 . 967 Thread 0x00007f3330228800 DEOPT UNPACKING pc=0x00007f331892731f sp=0x00007f330ab97648 mode 2 
Event: 31 . 827 Thread 0x00007f3330217000 DEOPT PACKING pc=0x00007f3319074d1f sp=0x00007f330b19d710 
Event: 31 . 827 Thread 0x00007f3330217000 DEOPT UNPACKING pc=0x00007f331892712b sp=0x00007f330b19cd20 mode 0 
Event: 31 . 904 Thread 0x00007f333021a000 DEOPT PACKING pc=0x00007f331908ed46 sp=0x00007f330b09c6a0 
Event: 31 . 904 Thread 0x00007f333021a000 DEOPT UNPACKING pc=0x00007f331892712b sp=0x00007f330b09bcb0 mode 0 
Event: 31 . 911 Thread 0x00007f333021a000 Uncommon trap: trap_request=0xffffff4d fr.pc =0x00007f33204aeec0 relative=0x00000000000006c0 
Event: 31 . 911 Thread 0x00007f333021a000 Uncommon trap: reason=unstable_if action=reinterpret pc=0x00007f33204aeec0 method= cs451.layers.UBLayer.garbageCollect ()V @ 130 c2 
Event: 31 . 911 Thread 0x00007f333021a000 DEOPT PACKING pc=0x00007f33204aeec0 sp=0x00007f330b09c820 
Event: 31 . 911 Thread 0x00007f333021a000 DEOPT UNPACKING pc=0x00007f331892731f sp=0x00007f330b09c7b8 mode 2 
Event: 32 . 182 Thread 0x00007f3330016000 DEOPT PACKING pc=0x00007f3319061ccb sp=0x00007f3338d40720 
Event: 32 . 182 Thread 0x00007f3330016000 DEOPT UNPACKING pc=0x00007f331892712b sp=0x00007f3338d3fd78 mode 0 
Event: 32 . 637 Thread 0x00007f3330228800 Uncommon trap: trap_request=0xffffffde fr.pc =0x00007f33204885bc relative=0x00000000000008fc 
Event: 32 . 637 Thread 0x00007f3330228800 Uncommon trap: reason=class_check action=maybe_recompile pc=0x00007f33204885bc method= java.util.HashMap.putVal (ILjava/lang/Object;Ljava/lang/Object;ZZ)Ljava/lang/Object; @ 91 c2 
Event: 32 . 637 Thread 0x00007f3330228800 DEOPT PACKING pc=0x00007f33204885bc sp=0x00007f330ab97770 
Event: 32 . 637 Thread 0x00007f3330228800 DEOPT UNPACKING pc=0x00007f331892731f sp=0x00007f330ab976a0 mode 2 

Classes redefined ( 0 events): 
No events 

Internal exceptions ( 20 events): 
Event: 0 . 188 Thread 0x00007f3330016000 Exception <a 'java/lang/NoSuchMethodError' {0x00000000802c5858}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, int)' > (0x00000000802c5858) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 0 . 198 Thread 0x00007f3330016000 Exception <a 'java/lang/NoSuchMethodError' {0x000000008033ec88}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, int)' > (0x000000008033ec88) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 0 . 199 Thread 0x00007f3330016000 Exception <a 'java/lang/NoSuchMethodError' {0x000000008034b280}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, int, int)' > (0x000000008034b280) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 0 . 200 Thread 0x00007f3330016000 Exception <a 'java/lang/NoSuchMethodError' {0x0000000080357e08}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, int, int, java.lang.Object)' > (0x0000000080357e08) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 0 . 201 Thread 0x00007f3330016000 Exception <a 'java/lang/NoSuchMethodError' {0x00000000803652a0}: 'java.lang.Object java.lang.invoke.Invokers$Holder.linkToTargetMethod(java.lang.Object, int, java.lang.Object)' > (0x00000000803652a0) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 1 . 569 Thread 0x00007f3330016000 Exception <a 'java/lang/NoSuchMethodError' {0x00000000804261e8}: 'int java.lang.invoke.DirectMethodHandle$Holder.invokeSpecialIFC(java.lang.Object, java.lang.Object, int)' > (0x00000000804261e8) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 1 . 750 Thread 0x00007f3330016000 Exception <a 'java/lang/NoSuchMethodError' {0x00000000804ad110}: 'void java.lang.invoke.DirectMethodHandle$Holder.invokeSpecial(java.lang.Object, java.lang.Object)' > (0x00000000804ad110) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 2 . 292 Thread 0x00007f333021b800 Exception <a 'java/lang/NoSuchMethodError' {0x000000008468c340}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeSpecial(java.lang.Object, java.lang.Object, long, java.lang.Object)' > (0x000000008468c340) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 2 . 293 Thread 0x00007f3330220000 Exception <a 'java/lang/NoSuchMethodError' {0x0000000081d7c958}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeSpecial(java.lang.Object, java.lang.Object, long, java.lang.Object)' > (0x0000000081d7c958) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 2 . 579 Thread 0x00007f3330220000 Exception <a 'java/lang/NoSuchMethodError' {0x0000000081d7f550}: 'java.lang.Object java.lang.invoke.Invokers$Holder.linkToTargetMethod(long, java.lang.Object, java.lang.Object)' > (0x0000000081d7f550) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 3 . 532 Thread 0x00007f3330228800 Exception <a 'java/lang/NoSuchMethodError' {0x000000008b41c3b8}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, int)' > (0x000000008b41c3b8) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 3 . 535 Thread 0x00007f3330228800 Exception <a 'java/lang/NoSuchMethodError' {0x000000008b43a498}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, int, int)' > (0x000000008b43a498) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 3 . 718 Thread 0x00007f3330228800 Exception <a 'java/lang/NoSuchMethodError' {0x000000008b45c388}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, int, int, java.lang.Object)' > (0x000000008b45c388) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 3 . 759 Thread 0x00007f3330228800 Exception <a 'java/lang/NoSuchMethodError' {0x000000008b47c840}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, int, int, java.lang.Object, java.lang.Object)' > (0x000000008b47c840) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 4 . 310 Thread 0x00007f33301ff800 Exception <a 'java/lang/NoSuchMethodError' {0x000000008d84b190}: 'java.lang.Object java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(java.lang.Object, int, java.lang.Object)' > (0x000000008d84b190) thrown at [./src/hotspot/share/interpreter/linkResolver.cpp, line 773 ] 
Event: 4 . 438 Thread 0x00007f33301ff800 Exception <a 'java/lang/ClassNotFoundException' {0x000000008d8ad5b0}: sun/util/logging/resources/spi/loggingProvider> (0x000000008d8ad5b0) thrown at [./src/hotspot/share/classfile/systemDictionary.cpp, line 231 ] 
Event: 16 . 813 Thread 0x00007f3330217000 Implicit null exception at 0x00007f332042c66a to 0x00007f332042c6f4 
Event: 16 . 815 Thread 0x00007f3330217000 Implicit null exception at 0x00007f3320432900 to 0x00007f3320432974 
Event: 16 . 890 Thread 0x00007f3330217000 Implicit null exception at 0x00007f33204a7930 to 0x00007f33204a7e58 
Event: 31 . 911 Thread 0x00007f333021a000 Implicit null exception at 0x00007f33204aea60 to 0x00007f33204aee88 

Events ( 20 events): 
Event: 16 . 813 loading class jdk/internal/math/FloatingDecimal$ASCIIToBinaryConverter 
Event: 16 . 813 loading class jdk/internal/math/FloatingDecimal$ASCIIToBinaryConverter done 
Event: 16 . 813 loading class jdk/internal/math/FloatingDecimal$PreparedASCIIToBinaryBuffer done 
Event: 16 . 813 loading class jdk/internal/math/FDBigInteger 
Event: 16 . 814 loading class jdk/internal/math/FDBigInteger done 
Event: 16 . 815 loading class jdk/internal/math/FormattedFloatingDecimal$ 2 
Event: 16 . 815 loading class jdk/internal/math/FormattedFloatingDecimal$ 2 done 
Event: 16 . 815 Executing VM operation: RevokeBias 
Event: 16 . 815 Executing VM operation: RevokeBias done 
Event: 24 . 098 Executing VM operation: GenCollectForAllocation 
Event: 24 . 694 Executing VM operation: GenCollectForAllocation done 
Event: 30 . 963 Executing VM operation: RevokeBias 
Event: 30 . 966 Executing VM operation: RevokeBias done 
Event: 31 . 840 Executing VM operation: RevokeBias 
Event: 31 . 840 Executing VM operation: RevokeBias done 
Event: 31 . 840 Executing VM operation: RevokeBias 
Event: 31 . 840 Executing VM operation: RevokeBias done 
Event: 31 . 842 Executing VM operation: RevokeBias 
Event: 31 . 842 Executing VM operation: RevokeBias done 
Event: 35 . 785 Executing VM operation: GenCollectForAllocation 


Dynamic libraries: 
80000000-100000000 rw-p 00000000 00:00 0 
800000000-800002000 rwxp 00001000 08:01 1181904 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/classes.jsa 
800002000-8003b9000 rw-p 00003000 08:01 1181904 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/classes.jsa 
8003b9000-800a81000 r--p 003ba000 08:01 1181904 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/classes.jsa 
800a81000-800a82000 rw-p 00a82000 08:01 1181904 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/classes.jsa 
800a82000-80108f000 r--p 00a83000 08:01 1181904 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/classes.jsa 
840000000-8400c0000 rw-p 00000000 00:00 0 
8400c0000-880000000 ---p 00000000 00:00 0 
5606ee150000-5606ee151000 r-xp 00000000 08:01 661163 /usr/lib/jvm/jav a-11 -openjdk-amd64/bin/java 
5606ee351000-5606ee352000 r--p 00001000 08:01 661163 /usr/lib/jvm/jav a-11 -openjdk-amd64/bin/java 
5606ee352000-5606ee353000 rw-p 00002000 08:01 661163 /usr/lib/jvm/jav a-11 -openjdk-amd64/bin/java 
5606ef2a5000-5606ef2c6000 rw-p 00000000 00:00 0 [heap] 
7f32c4000000-7f32c483a000 rw-p 00000000 00:00 0 
7f32c483a000-7f32c8000000 ---p 00000000 00:00 0 
7f32cc000000-7f32cc021000 rw-p 00000000 00:00 0 
7f32cc021000-7f32d0000000 ---p 00000000 00:00 0 
7f32d0000000-7f32d0045000 rw-p 00000000 00:00 0 
7f32d0045000-7f32d4000000 ---p 00000000 00:00 0 
7f32d4000000-7f32d4021000 rw-p 00000000 00:00 0 
7f32d4021000-7f32d8000000 ---p 00000000 00:00 0 
7f32d8000000-7f32d8021000 rw-p 00000000 00:00 0 
7f32d8021000-7f32dc000000 ---p 00000000 00:00 0 
7f32dc000000-7f32dc021000 rw-p 00000000 00:00 0 
7f32dc021000-7f32e0000000 ---p 00000000 00:00 0 
7f32e0000000-7f32e0021000 rw-p 00000000 00:00 0 
7f32e0021000-7f32e4000000 ---p 00000000 00:00 0 
7f32e4000000-7f32e4021000 rw-p 00000000 00:00 0 
7f32e4021000-7f32e8000000 ---p 00000000 00:00 0 
7f32e8000000-7f32e8021000 rw-p 00000000 00:00 0 
7f32e8021000-7f32ec000000 ---p 00000000 00:00 0 
7f32ec000000-7f32ec021000 rw-p 00000000 00:00 0 
7f32ec021000-7f32f0000000 ---p 00000000 00:00 0 
7f32f0000000-7f32f0021000 rw-p 00000000 00:00 0 
7f32f0021000-7f32f4000000 ---p 00000000 00:00 0 
7f32f4000000-7f32f4021000 rw-p 00000000 00:00 0 
7f32f4021000-7f32f8000000 ---p 00000000 00:00 0 
7f32f8000000-7f32f8021000 rw-p 00000000 00:00 0 
7f32f8021000-7f32fc000000 ---p 00000000 00:00 0 
7f32fc000000-7f32fd02b000 rw-p 00000000 00:00 0 
7f32fd02b000-7f3300000000 ---p 00000000 00:00 0 
7f3300000000-7f3300365000 rw-p 00000000 00:00 0 
7f3300365000-7f3304000000 ---p 00000000 00:00 0 
7f3304000000-7f3304021000 rw-p 00000000 00:00 0 
7f3304021000-7f3308000000 ---p 00000000 00:00 0 
7f330a997000-7f330a99b000 ---p 00000000 00:00 0 
7f330a99b000-7f330aa98000 rw-p 00000000 00:00 0 
7f330aa98000-7f330aa9c000 ---p 00000000 00:00 0 
7f330aa9c000-7f330ab99000 rw-p 00000000 00:00 0 
7f330ab99000-7f330ab9d000 ---p 00000000 00:00 0 
7f330ab9d000-7f330ac9a000 rw-p 00000000 00:00 0 
7f330ac9a000-7f330ac9e000 ---p 00000000 00:00 0 
7f330ac9e000-7f330ad9b000 rw-p 00000000 00:00 0 
7f330ad9b000-7f330ad9f000 ---p 00000000 00:00 0 
7f330ad9f000-7f330ae9c000 rw-p 00000000 00:00 0 
7f330ae9c000-7f330aea0000 ---p 00000000 00:00 0 
7f330aea0000-7f330af9d000 rw-p 00000000 00:00 0 
7f330af9d000-7f330afa1000 ---p 00000000 00:00 0 
7f330afa1000-7f330b09e000 rw-p 00000000 00:00 0 
7f330b09e000-7f330b0a2000 ---p 00000000 00:00 0 
7f330b0a2000-7f330b19f000 rw-p 00000000 00:00 0 
7f330b19f000-7f330b1a3000 ---p 00000000 00:00 0 
7f330b1a3000-7f330b2a0000 rw-p 00000000 00:00 0 
7f330b2a0000-7f330b2a2000 r-xp 00000000 08:01 1049876 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libextnet.so 
7f330b2a2000-7f330b4a1000 ---p 00002000 08:01 1049876 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libextnet.so 
7f330b4a1000-7f330b4a2000 r--p 00001000 08:01 1049876 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libextnet.so 
7f330b4a2000-7f330b4a3000 rw-p 00002000 08:01 1049876 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libextnet.so 
7f330b4a3000-7f330b4b9000 r-xp 00000000 08:01 1050087 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libnet.so 
7f330b4b9000-7f330b6b8000 ---p 00016000 08:01 1050087 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libnet.so 
7f330b6b8000-7f330b6b9000 r--p 00015000 08:01 1050087 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libnet.so 
7f330b6b9000-7f330b6ba000 rw-p 00016000 08:01 1050087 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libnet.so 
7f330b6ba000-7f330b6ca000 r-xp 00000000 08:01 1050098 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libnio.so 
7f330b6ca000-7f330b8c9000 ---p 00010000 08:01 1050098 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libnio.so 
7f330b8c9000-7f330b8ca000 r--p 0000f000 08:01 1050098 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libnio.so 
7f330b8ca000-7f330b8cb000 rw-p 00010000 08:01 1050098 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libnio.so 
7f330b8cb000-7f330b8cf000 ---p 00000000 00:00 0 
7f330b8cf000-7f330b9cc000 rw-p 00000000 00:00 0 
7f330b9cc000-7f330b9cd000 ---p 00000000 00:00 0 
7f330b9cd000-7f330bace000 rw-p 00000000 00:00 0 
7f330bace000-7f330bad2000 ---p 00000000 00:00 0 
7f330bad2000-7f330bbcf000 rw-p 00000000 00:00 0 
7f330bbcf000-7f330bbd3000 ---p 00000000 00:00 0 
7f330bbd3000-7f330bcd0000 rw-p 00000000 00:00 0 
7f330bcd0000-7f330c000000 r--p 00000000 08:01 2360321 /usr/lib/locale/local e-a rchive 
7f330c000000-7f330c021000 rw-p 00000000 00:00 0 
7f330c021000-7f3310000000 ---p 00000000 00:00 0 
7f3310000000-7f3310021000 rw-p 00000000 00:00 0 
7f3310021000-7f3314000000 ---p 00000000 00:00 0 
7f3314000000-7f33140e9000 rw-p 00000000 00:00 0 
7f33140e9000-7f3318000000 ---p 00000000 00:00 0 
7f3318001000-7f3318005000 ---p 00000000 00:00 0 
7f3318005000-7f33185c2000 rw-p 00000000 00:00 0 
7f33185c2000-7f3318902000 ---p 00000000 00:00 0 
7f3318902000-7f3318b72000 rwxp 00000000 00:00 0 
7f3318b72000-7f3318e92000 ---p 00000000 00:00 0 
7f3318e92000-7f3319102000 rwxp 00000000 00:00 0 
7f3319102000-7f33203ca000 ---p 00000000 00:00 0 
7f33203ca000-7f332063a000 rwxp 00000000 00:00 0 
7f332063a000-7f3327902000 ---p 00000000 00:00 0 
7f3327902000-7f3330000000 r--s 00000000 08:01 1050240 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/modules 
7f3330000000-7f3330254000 rw-p 00000000 00:00 0 
7f3330254000-7f3334000000 ---p 00000000 00:00 0 
7f33340ec000-7f33340f0000 ---p 00000000 00:00 0 
7f33340f0000-7f33341ed000 rw-p 00000000 00:00 0 
7f33341ed000-7f33341f1000 ---p 00000000 00:00 0 
7f33341f1000-7f33342ee000 rw-p 00000000 00:00 0 
7f33342ee000-7f33342f2000 ---p 00000000 00:00 0 
7f33342f2000-7f33343ef000 rw-p 00000000 00:00 0 
7f33343ef000-7f33343f3000 ---p 00000000 00:00 0 
7f33343f3000-7f33344f0000 rw-p 00000000 00:00 0 
7f33344f0000-7f33344f1000 ---p 00000000 00:00 0 
7f33344f1000-7f3334d1e000 rw-p 00000000 00:00 0 
7f3334d1e000-7f3334d24000 rw-p 00000000 00:00 0 
7f3334d24000-7f3334e0a000 ---p 00000000 00:00 0 
7f3334e0a000-7f3334e0f000 rw-p 00000000 00:00 0 
7f3334e0f000-7f3334ef5000 ---p 00000000 00:00 0 
7f3334ef5000-7f3334efc000 r-xp 00000000 08:01 1050223 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libzip.so 
7f3334efc000-7f33350fb000 ---p 00007000 08:01 1050223 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libzip.so 
7f33350fb000-7f33350fc000 r--p 00006000 08:01 1050223 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libzip.so 
7f33350fc000-7f33350fd000 rw-p 00007000 08:01 1050223 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libzip.so 
7f33350fd000-7f3335108000 r-xp 00000000 08:01 1835055 /lib/x86_64-linux-gnu/libnss_files- 2 . 27 .so 
7f3335108000-7f3335307000 ---p 0000b000 08:01 1835055 /lib/x86_64-linux-gnu/libnss_files- 2 . 27 .so 
7f3335307000-7f3335308000 r--p 0000a000 08:01 1835055 /lib/x86_64-linux-gnu/libnss_files- 2 . 27 .so 
7f3335308000-7f3335309000 rw-p 0000b000 08:01 1835055 /lib/x86_64-linux-gnu/libnss_files- 2 . 27 .so 
7f3335309000-7f333530f000 rw-p 00000000 00:00 0 
7f333530f000-7f3335326000 r-xp 00000000 08:01 1835052 /lib/x86_64-linux-gnu/libnsl- 2 . 27 .so 
7f3335326000-7f3335525000 ---p 00017000 08:01 1835052 /lib/x86_64-linux-gnu/libnsl- 2 . 27 .so 
7f3335525000-7f3335526000 r--p 00016000 08:01 1835052 /lib/x86_64-linux-gnu/libnsl- 2 . 27 .so 
7f3335526000-7f3335527000 rw-p 00017000 08:01 1835052 /lib/x86_64-linux-gnu/libnsl- 2 . 27 .so 
7f3335527000-7f3335529000 rw-p 00000000 00:00 0 
7f3335529000-7f3335534000 r-xp 00000000 08:01 1835057 /lib/x86_64-linux-gnu/libnss_nis- 2 . 27 .so 
7f3335534000-7f3335733000 ---p 0000b000 08:01 1835057 /lib/x86_64-linux-gnu/libnss_nis- 2 . 27 .so 
7f3335733000-7f3335734000 r--p 0000a000 08:01 1835057 /lib/x86_64-linux-gnu/libnss_nis- 2 . 27 .so 
7f3335734000-7f3335735000 rw-p 0000b000 08:01 1835057 /lib/x86_64-linux-gnu/libnss_nis- 2 . 27 .so 
7f3335735000-7f333573d000 r-xp 00000000 08:01 1835053 /lib/x86_64-linux-gnu/libnss_compat- 2 . 27 .so 
7f333573d000-7f333593d000 ---p 00008000 08:01 1835053 /lib/x86_64-linux-gnu/libnss_compat- 2 . 27 .so 
7f333593d000-7f333593e000 r--p 00008000 08:01 1835053 /lib/x86_64-linux-gnu/libnss_compat- 2 . 27 .so 
7f333593e000-7f333593f000 rw-p 00009000 08:01 1835053 /lib/x86_64-linux-gnu/libnss_compat- 2 . 27 .so 
7f333593f000-7f3335944000 r-xp 00000000 08:01 1049932 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libjimage.so 
7f3335944000-7f3335b43000 ---p 00005000 08:01 1049932 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libjimage.so 
7f3335b43000-7f3335b44000 r--p 00004000 08:01 1049932 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libjimage.so 
7f3335b44000-7f3335b45000 rw-p 00005000 08:01 1049932 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libjimage.so 
7f3335b45000-7f3335b6e000 r-xp 00000000 08:01 1049899 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libjava.so 
7f3335b6e000-7f3335d6e000 ---p 00029000 08:01 1049899 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libjava.so 
7f3335d6e000-7f3335d6f000 r--p 00029000 08:01 1049899 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libjava.so 
7f3335d6f000-7f3335d70000 rw-p 0002a000 08:01 1049899 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libjava.so 
7f3335d70000-7f3335d71000 rw-p 00000000 00:00 0 
7f3335d71000-7f3335d7e000 r-xp 00000000 08:01 1050221 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libverify.so 
7f3335d7e000-7f3335f7d000 ---p 0000d000 08:01 1050221 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libverify.so 
7f3335f7d000-7f3335f7f000 r--p 0000c000 08:01 1050221 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libverify.so 
7f3335f7f000-7f3335f80000 rw-p 0000e000 08:01 1050221 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/libverify.so 
7f3335f80000-7f3335f87000 r-xp 00000000 08:01 1840227 /lib/x86_64-linux-gnu/librt- 2 . 27 .so 
7f3335f87000-7f3336186000 ---p 00007000 08:01 1840227 /lib/x86_64-linux-gnu/librt- 2 . 27 .so 
7f3336186000-7f3336187000 r--p 00006000 08:01 1840227 /lib/x86_64-linux-gnu/librt- 2 . 27 .so 
7f3336187000-7f3336188000 rw-p 00007000 08:01 1840227 /lib/x86_64-linux-gnu/librt- 2 . 27 .so 
7f3336188000-7f333619f000 r-xp 00000000 08:01 1835013 /lib/x86_64-linux-gnu/libgcc_s. so.1 
7f333619f000-7f333639e000 ---p 00017000 08:01 1835013 /lib/x86_64-linux-gnu/libgcc_s. so.1 
7f333639e000-7f333639f000 r--p 00016000 08:01 1835013 /lib/x86_64-linux-gnu/libgcc_s. so.1 
7f333639f000-7f33363a0000 rw-p 00017000 08:01 1835013 /lib/x86_64-linux-gnu/libgcc_s. so.1 
7f33363a0000-7f333653d000 r-xp 00000000 08:01 1835049 /lib/x86_64-linux-gnu/libm- 2 . 27 .so 
7f333653d000-7f333673c000 ---p 0019d000 08:01 1835049 /lib/x86_64-linux-gnu/libm- 2 . 27 .so 
7f333673c000-7f333673d000 r--p 0019c000 08:01 1835049 /lib/x86_64-linux-gnu/libm- 2 . 27 .so 
7f333673d000-7f333673e000 rw-p 0019d000 08:01 1835049 /lib/x86_64-linux-gnu/libm- 2 . 27 .so 
7f333673e000-7f33368b7000 r-xp 00000000 08:01 2360550 /usr/lib/x86_64-linux-gnu/libstdc++. so.6.0.25 
7f33368b7000-7f3336ab7000 ---p 00179000 08:01 2360550 /usr/lib/x86_64-linux-gnu/libstdc++. so.6.0.25 
7f3336ab7000-7f3336ac1000 r--p 00179000 08:01 2360550 /usr/lib/x86_64-linux-gnu/libstdc++. so.6.0.25 
7f3336ac1000-7f3336ac3000 rw-p 00183000 08:01 2360550 /usr/lib/x86_64-linux-gnu/libstdc++. so.6.0.25 
7f3336ac3000-7f3336ac7000 rw-p 00000000 00:00 0 
7f3336ac7000-7f3337ba5000 r-xp 00000000 08:01 1181144 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/libjvm.so 
7f3337ba5000-7f3337da4000 ---p 010de000 08:01 1181144 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/libjvm.so 
7f3337da4000-7f3337e61000 r--p 010dd000 08:01 1181144 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/libjvm.so 
7f3337e61000-7f3337e9a000 rw-p 0119a000 08:01 1181144 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/server/libjvm.so 
7f3337e9a000-7f3337ef1000 rw-p 00000000 00:00 0 
7f3337ef1000-7f3337f0b000 r-xp 00000000 08:01 1840183 /lib/x86_64-linux-gnu/libpthr ead-2 . 27 .so 
7f3337f0b000-7f333810a000 ---p 0001a000 08:01 1840183 /lib/x86_64-linux-gnu/libpthr ead-2 . 27 .so 
7f333810a000-7f333810b000 r--p 00019000 08:01 1840183 /lib/x86_64-linux-gnu/libpthr ead-2 . 27 .so 
7f333810b000-7f333810c000 rw-p 0001a000 08:01 1840183 /lib/x86_64-linux-gnu/libpthr ead-2 . 27 .so 
7f333810c000-7f3338110000 rw-p 00000000 00:00 0 
7f3338110000-7f3338113000 r-xp 00000000 08:01 1835048 /lib/x86_64-linux-gnu/libdl- 2 . 27 .so 
7f3338113000-7f3338312000 ---p 00003000 08:01 1835048 /lib/x86_64-linux-gnu/libdl- 2 . 27 .so 
7f3338312000-7f3338313000 r--p 00002000 08:01 1835048 /lib/x86_64-linux-gnu/libdl- 2 . 27 .so 
7f3338313000-7f3338314000 rw-p 00003000 08:01 1835048 /lib/x86_64-linux-gnu/libdl- 2 . 27 .so 
7f3338314000-7f3338330000 r-xp 00000000 08:01 1840663 /lib/x86_64-linux-gnu/libz. so.1.2.11 
7f3338330000-7f333852f000 ---p 0001c000 08:01 1840663 /lib/x86_64-linux-gnu/libz. so.1.2.11 
7f333852f000-7f3338530000 r--p 0001b000 08:01 1840663 /lib/x86_64-linux-gnu/libz. so.1.2.11 
7f3338530000-7f3338531000 rw-p 0001c000 08:01 1840663 /lib/x86_64-linux-gnu/libz. so.1.2.11 
7f3338531000-7f3338718000 r-xp 00000000 08:01 1835045 /lib/x86_64-linux-gnu/li bc-2 . 27 .so 
7f3338718000-7f3338918000 ---p 001e7000 08:01 1835045 /lib/x86_64-linux-gnu/li bc-2 . 27 .so 
7f3338918000-7f333891c000 r--p 001e7000 08:01 1835045 /lib/x86_64-linux-gnu/li bc-2 . 27 .so 
7f333891c000-7f333891e000 rw-p 001eb000 08:01 1835045 /lib/x86_64-linux-gnu/li bc-2 . 27 .so 
7f333891e000-7f3338922000 rw-p 00000000 00:00 0 
7f3338922000-7f3338932000 r-xp 00000000 08:01 1049770 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/jli/libjli.so 
7f3338932000-7f3338b31000 ---p 00010000 08:01 1049770 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/jli/libjli.so 
7f3338b31000-7f3338b32000 r--p 0000f000 08:01 1049770 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/jli/libjli.so 
7f3338b32000-7f3338b33000 rw-p 00010000 08:01 1049770 /usr/lib/jvm/jav a-11 -openjdk-amd64/lib/jli/libjli.so 
7f3338b33000-7f3338b5a000 r-xp 00000000 08:01 1835021 /lib/x86_64-linux-gnu/l d-2 . 27 .so 
7f3338bda000-7f3338c3a000 rw-p 00000000 00:00 0 
7f3338c3a000-7f3338c41000 ---p 00000000 00:00 0 
7f3338c41000-7f3338c45000 ---p 00000000 00:00 0 
7f3338c45000-7f3338d44000 rw-p 00000000 00:00 0 
7f3338d4c000-7f3338d4e000 r--s 00007000 08:01 2628883 /usr/share/java/jav a-a tk- wrapper.jar 
7f3338d4e000-7f3338d56000 rw-s 00000000 08:01 2633774 /tmp/hsperfdata_dcl/ 8096 
7f3338d56000-7f3338d57000 ---p 00000000 00:00 0 
7f3338d57000-7f3338d58000 r--p 00000000 00:00 0 
7f3338d58000-7f3338d5a000 rw-p 00000000 00:00 0 
7f3338d5a000-7f3338d5b000 r--p 00027000 08:01 1835021 /lib/x86_64-linux-gnu/l d-2 . 27 .so 
7f3338d5b000-7f3338d5c000 rw-p 00028000 08:01 1835021 /lib/x86_64-linux-gnu/l d-2 . 27 .so 
7f3338d5c000-7f3338d5d000 rw-p 00000000 00:00 0 
7ffd20c7f000-7ffd20ca0000 rw-p 00000000 00:00 0 [stack] 
7ffd20db3000-7ffd20db6000 r--p 00000000 00:00 0 [vvar] 
7ffd20db6000-7ffd20db8000 r-xp 00000000 00:00 0 [vdso] 
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] 


VM Arguments: 
jvm_args: -XX:+UseSerialGC -Xms2g 
java_command: /home/dcl/Documents/project/CS 451-2020 -project/template_java/bin/da_proc.jar --id 1 --hosts hosts.txt --barrier 0 . 0 . 0 . 0:10000 --signal 0 . 0 . 0 . 0:11000 --output outputs/ 1 .txt config 
java_class_path (initial): /home/dcl/Documents/project/CS 451-2020 -project/template_java/bin/da_proc.jar 
Launcher Type: SUN_STANDARD 

[Global flags] 
intx CICompilerCount = 3 {product} {ergonomic} 
size_t InitialHeapSize = 2147483648 {product} {command line} 
size_t MaxHeapSize = 2147483648 {product} {ergonomic} 
size_t MaxNewSize = 715784192 {product} {ergonomic} 
size_t MinHeapDeltaBytes = 196608 {product} {ergonomic} 
size_t NewSize = 715784192 {product} {ergonomic} 
uintx NonNMethodCodeHeapSize = 5830732 {pd product} {ergonomic} 
uintx NonProfiledCodeHeapSize = 122913754 {pd product} {ergonomic} 
size_t OldSize = 1431699456 {product} {ergonomic} 
uintx ProfiledCodeHeapSize = 122913754 {pd product} {ergonomic} 
uintx ReservedCodeCacheSize = 251658240 {pd product} {ergonomic} 
bool SegmentedCodeCache = true {product} {ergonomic} 
bool UseCompressedClassPointers = true {lp64_product} {ergonomic} 
bool UseCompressedOops = true {lp64_product} {ergonomic} 
bool UseSerialGC = true {product} {command line} 

Logging: 
Log output configuration: 
# 0 : stdout all=warning uptime,level,tags 
# 1 : stderr all=off uptime,level,tags 

Environment Variables: 
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin 
SHELL=/bin/bash 
DISPLAY=: 0 . 0 
LANG= en_US.UTF-8 

Signal Handlers: 
SIGSEGV: [ libjvm.so +0xdf9610], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGBUS: [ libjvm.so +0xdf9610], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGFPE: [ libjvm.so +0xdf9610], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGPIPE: [ libjvm.so +0xbcc360], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGXFSZ: [ libjvm.so +0xbcc360], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGILL: [ libjvm.so +0xdf9610], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGUSR2: [ libjvm.so +0xbcc200], sa_mask[ 0 ]= 00000000000000000000000000000000 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGHUP: [ libjvm.so +0xbcc560], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGINT: [ libjvm.so +0xbcc560], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGTERM: [ libjvm.so +0xbcc560], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 
SIGQUIT: [ libjvm.so +0xbcc560], sa_mask[ 0 ]= 11111111011111111101111111111110 , sa_flags=SA_RESTART|SA_SIGINFO 


--------------- S Y S T E M --------------- 

OS:DISTRIB_ID=Ubuntu 
DISTRIB_RELEASE= 18 . 04 
DISTRIB_CODENAME=bionic 
DISTRIB_DESCRIPTION= "Ubuntu 18.04.5 LTS" 
uname:Linux 4 . 15 . 0-117 -generic # 118 -Ubuntu SMP Fri Sep 4 20:02:41 UTC 2020 x86_64 
OS uptime: 0 days 1:40 hours 
libc:glibc 2 . 27 NPTL 2 . 27 
rlimit (soft/hard): STACK 8192k/infinity , CORE 0k/infinity , NPROC 15599 / 15599 , NOFILE 1048576 / 1048576 , AS infinity/infinity , CPU infinity/infinity , DATA infinity/infinity , FSIZE infinity/infinity , MEMLOCK 16384k/16384k 
load averag e:3 . 58 1 . 25 1 . 03 

/proc/meminfo: 
MemTotal: 4038492 kB 
MemFree: 127440 kB 
MemAvailable: 42992 kB 
Buffers: 3136 kB 
Cached: 42140 kB 
SwapCached: 94828 kB 
Active: 3127224 kB 
Inactive: 638620 kB 
Active(anon): 3102196 kB 
Inactive(anon): 619920 kB 
Active(file): 25028 kB 
Inactive(file): 18700 kB 
Unevictable: 32 kB 
Mlocked: 32 kB 
SwapTotal: 2097148 kB 
SwapFree: 1481212 kB 
Dirty: 72 kB 
Writeback: 85228 kB 
AnonPages: 3632620 kB 
Mapped: 35884 kB 
Shmem: 1484 kB 
Slab: 56584 kB 
SReclaimable: 24640 kB 
SUnreclaim: 31944 kB 
KernelStack: 8016 kB 
PageTables: 30472 kB 
NFS_Unstable: 0 kB 
Bounce: 0 kB 
WritebackTmp: 0 kB 
CommitLimit: 4116392 kB 
Committed_AS: 9215852 kB 
VmallocTotal: 34359738367 kB 
VmallocUsed: 0 kB 
VmallocChunk: 0 kB 
HardwareCorrupted: 0 kB 
AnonHugePages: 0 kB 
ShmemHugePages: 0 kB 
ShmemPmdMapped: 0 kB 
CmaTotal: 0 kB 
CmaFree: 0 kB 
HugePages_Total: 0 
HugePages_Free: 0 
HugePages_Rsvd: 0 
HugePages_Surp: 0 
Hugepagesize: 2048 kB 
DirectMap4k: 120768 kB 
DirectMap2M: 4073472 kB 

/sys/kernel/mm/transparent_hugepage/enabled: 
always [madvise] never 

/sys/kernel/mm/transparent_hugepage/defrag (defrag/compaction efforts parameter): 
always defer defer+madvise [madvise] never 


/proc/sys/kernel/threads-max (system-wide limit on the number of threads): 
31199 


/proc/sys/vm/max_map_count (maximum number of memory map areas a process may have): 
65530 


/proc/sys/kernel/pid_max (system-wide limit on number of process identifiers): 
32768 



container (cgroup) information: 
container_type: cgroupv1 
cpu_cpuset_cpus: 0-5 
cpu_memory_nodes: 0 
active_processor_count: 6 
cpu_quota: - 1 
cpu_period: 100000 
cpu_shares: - 1 
memory_limit_in_bytes: - 1 
memory_and_swap_limit_in_bytes: - 2 
memory_soft_limit_in_bytes: - 1 
memory_usage_in_bytes: 3856912384 
memory_max_usage_in_bytes: 0 

KVM virtualization detected 
Steal ticks since vm start: 0 
Steal ticks percentage since vm start: 0 . 000 

CPU:total 6 (initial active 6 ) ( 6 cores per cpu, 1 threads per core) family 6 model 158 stepping 10 , cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1 , sse4.2 , tsc, tscinvbit 
CPU Model and flags from /proc/cpuinfo: 
model name : Intel(R) Core(TM) i 7-9750 H CPU @ 2 .60GHz 
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid tsc_known_freq pni ssse3 pcid sse4_1 sse4_2 hypervisor lahf_lm invpcid_single pti fsgsbase invpcid md_clear flush_l1d arch_capabilities 

Memory: 4k page, physical 4038492k(126820k free), swap 2097148k(1481212k free) 

vm_info: OpenJDK 64-B it Server VM ( 11 . 0 . 8 + 10 - post-Ubuntu-0ubuntu118.04.1 ) for linux-amd64 JRE ( 11 . 0 . 8 + 10 - post-Ubuntu-0ubuntu118.04.1 ), built on Jul 15 2020 20:45:24 by "unknown" with gcc 7 . 5 . 0 

END. 







More information about the hotspot-gc-dev mailing list