[8u] RFR (XS) 8231398: Add time tracing for gc log rotation at safepoint cleanup
Hohensee, Paul
hohensee at amazon.com
Wed Sep 25 17:35:23 UTC 2019
Looks good.
Paul
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:
RFE:
https://bugs.openjdk.java.net/browse/JDK-8231398
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.
Webrev:
https://cr.openjdk.java.net/~shade/8231398/webrev.01/
Testing: eyeballing safepoint cleanup tracing, tier1 (running)
--
Thanks,
-Aleksey
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