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 <[email protected]> --- 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
