RFR 8134802 - LCM register pressure scheduling

Andrew Haley aph at redhat.com
Sat Sep 12 09:37:28 UTC 2015

On 09/12/2015 04:58 AM, Vladimir Kozlov wrote:
> I looked on performance data and for scimark.lu.large C2 time increase 
> significantly (~ 39%) while score did not improve (0,18%).
> I can accept compilation time regression if it gives performance 
> improvement as crypto.aes. But otherwise we need to investigate why that 
> happens.

Is there any intention to look at other processors?  x86-64 tends to
be very aggressively out-of-order, which reduces the need for
scheduling to reduce the effects of latency.  Of course I'm interested
in AArch64, but it has more registers so tends to spill less; perhaps
ARM-32 would be an interesting candidate.


More information about the hotspot-compiler-dev mailing list