Commit 0da8c08d authored Jan 30, 2018 by Paul E. McKenney

torture: Grace periods do not piggyback off of themselves

The rcuperf trace-event processing counted every "done" trace event
as a piggyback, which is incorrect because the task that started the
grace period didn't piggyback at all. This commit fixes this problem
by recording the task that started a given grace period and ignoring
that task's "done" record for that grace period.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

parent cc839ce5

tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh

+2 −1

Original line number	Diff line number	Diff line
		@@ -44,6 +44,7 @@ $8 == "start" {
		starttask = $1;
		starttime = $3;
		startseq = $7;
		seqtask[startseq] = starttask;
		}

		$8 == "end" {
		@@ -62,7 +63,7 @@ $8 == "end" {
		}
		}

		$8 == "done" {
		$8 == "done" && seqtask[$7] != $1 {
		piggybackcnt[$1]++;
		}

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