Hi Stephane,
Forgive me if I understood wrongly but if I run the
example_v2.x/notify_self example on
my suse11 Nehalem system I get this:
./notify_self
[FIXED_CTRL(pmc16)=0xaa pmi0=1 en0=0x2 any0=0 pmi1=1 en1=0x2 any1=0
pmi2=1 en2=0x0 any2=0] INSTRUCTIONS_RETIRED UNHALTED_CORE_CYCLES
[FIXED_CTR0(pmd16)]
[FIXED_CTR1(pmd17)]
Notification 1: 1497911503 INSTRUCTIONS_RETIRED ip=0x4015a0
Notification 2: 1497711364 INSTRUCTIONS_RETIRED ip=0x4015a0
Notification 3: 1497964013 INSTRUCTIONS_RETIRED ip=0x4015a0
Now if instead of:
pfm_self_start(ctx_fd);
busyloop();
pfm_self_stop(ctx_fd);
I run
pfm_self_start(ctx_fd);
busyloop();
pfm_self_stop(ctx_fd);
printf("Run with counting stopped\n");
busyloop();
printf("Run again with counting started\n");
pfm_self_start(ctx_fd);
busyloop();
pfm_self_stop(ctx_fd);
I get:
./notify_self
[FIXED_CTRL(pmc16)=0xaa pmi0=1 en0=0x2 any0=0 pmi1=1 en1=0x2 any1=0
pmi2=1 en2=0x0 any2=0] INSTRUCTIONS_RETIRED UNHALTED_CORE_CYCLES
[FIXED_CTR0(pmd16)]
[FIXED_CTR1(pmd17)]
Notification 1: 1498758725 INSTRUCTIONS_RETIRED ip=0x4015e7
Notification 2: 1499513234 INSTRUCTIONS_RETIRED ip=0x4015e7
Notification 3: 1499545827 INSTRUCTIONS_RETIRED ip=0x4015e0
Run with counting stopped
Run again with counting started
I was expecting to get another set of notifications after:
"Run again with counting started"
so either:
-This is not the right way stop/resume counting. If so
please let me know what to do
-There is something wrong in the perfmon behavior on this
system
Thanks,
Daniel Thomas.
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