On Friday 26 August 2011 03:18 AM, Tom Gall wrote: > Hi all, > > Say has anyone else run oprofile on recent builds on panda? > > By recent I mean say anything since 11.07? Reason for asking is I'm > seeing basically a very very small number of samples being recorded... > as in there's no way this is right. > > Log: > > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# opcontrol --reset > Signalling daemon... done > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# opcontrol --start > Profiler running. > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# ./djpeg > ~linaro/Saturn.jpg > /dev/null > Decoding took 1216 ms > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# ./djpeg > ~linaro/Saturn.jpg > /dev/null > Decoding took 1206 ms > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# ./djpeg > ~linaro/Saturn.jpg > /dev/null > Decoding took 1207 ms > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# ./djpeg > ~linaro/Saturn.jpg > /dev/null > Decoding took 1212 ms > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# opcontrol --stop > Stopping profiling. > root@linaro-desktop:/home/linaro/ltj-1.1.90-d# opreport -l ./djpeg > Overflow stats not available > CPU: CPU with timer interrupt, speed 0 MHz (estimated) > Profiling through timer interrupt > samples % symbol name > 1 100.000 put_pixel_rows > Is it because oprofile is profiling through timer interrupt and not through pmu counter like CPU_CYCLES? One reason for not using pmu counters could be lack of support for pmu in omap4 as the pmu patch has been removed from linux-linaro-2.6.39 (https://bugs.launchpad.net/linux-linaro/+bug/802693) onwards that affected 11.07+ images.
Regards, Avik _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
