Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 11/12] torture: Grace periods do not piggyback off of themselves | Date | Mon, 26 Feb 2018 14:02:40 -0800 |
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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> --- tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh index dffb553a7bcc..8948f7926b21 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh @@ -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]++; } -- 2.5.2
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