Hi Masami, I applied your patches and enabled your ptracingtest code. I noticed that when there's dropped pages, the trace output is not in order:
# trace-cmd start -B ptracingtest -e all -v -e '*lock*'
# taskset -c 5 echo c > /proc/sysrq-trigger
On reboot, I ran:
# trace-cmd show -B ptracingtest > /tmp/trace.out
Then executed the attached perl program:
# ./read-ts.pl < /tmp/trace.out
And it errors our:
30.212495 < 30.213534
<...>-1048 [005] d.... 30.212495: irq_enable:
caller=irqentry_exit+0xf5/0x710 parent=0x0
That is, I think the zero timestamps may be messing with the order.
-- Steve
read-ts.pl
Description: Perl program
