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8220228: Improve Shenandoah pacing histogram message

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Reviewed-by: rkennke
This commit is contained in:
Aleksey Shipilev 2019-03-07 10:22:19 +01:00
parent 3d593b0c1c
commit ae233f6f0d
1 changed files with 5 additions and 0 deletions
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5
src/hotspot/share/gc/shenandoah/shenandoahPacer.cpp
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@ -299,4 +299,9 @@ void ShenandoahPacer::print_on(outputStream* out) const {
}
out->print_cr("%23s: " SIZE_FORMAT_W(12) SIZE_FORMAT_W(12) " ms", "Total", total_count, total_sum);
out->cr();
out->print_cr("Pacing delays are measured from entering the pacing code till exiting it. Therefore,");
out->print_cr("observed pacing delays may be higher than the threshold when paced thread spent more");
out->print_cr("time in the pacing code. It usually happens when thread is de-scheduled while paced,");
out->print_cr("OS takes longer to unblock the thread, or JVM experiences an STW pause.");
out->cr();
}