[8u] RFR (XS) 8231398: Add time tracing for gc log rotation at safepoint cleanup
shade at redhat.com
Tue Oct 1 10:16:57 UTC 2019
I'll wait for 8u approval now.
On 9/25/19 7:35 PM, Hohensee, Paul wrote:
> Looks good.
> On 9/24/19, 1:17 AM, "hotspot-runtime-dev on behalf of Aleksey Shipilev" <hotspot-runtime-dev-bounces at openjdk.java.net on behalf of shade at redhat.com> wrote:
> There is a nice gotcha when dealing with low latency workloads. The safepoint cleanup does lots of
> things, notably rotating the GC logs in 8 (fixed by transition to Unified Logging in 9+, see
> JDK-8145092). Those things are normally caught by -XX:+TraceSafepointCleanupTime, but not gc log
> rotation, since it misses the tracing statement.
> We should consider adding the tracing there.
> Testing: eyeballing safepoint cleanup tracing, tier1 (running)
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