On Thu, May 20, 2010 at 3:28 PM, stephane eranian <eran...@googlemail.com>wrote:
> On Thu, May 20, 2010 at 8:59 AM, Tianwei <tianwei.sh...@gmail.com> wrote: > > Hi, Stephane, > > I try to analyze the overhead of a Pin tool, I used the following > command, > > but failed: > > tian...@tianwei:~/valgrind/drt/tsan$ pfmon /home/tianwei/pin/pin > > -follow_execv -t64 ./bin/amd64-linux-debug-ts_pin.so -t > > ./bin/x86-linux-debug-ts_pin.so -short_name -slow_asserts -- > > ../unittest/bin/demo_tests-linux-amd64-O0 --gtest_filter=*Race* > > [23085] task terminated by signal 10, results may be incorrect > > 4808773 UNHALTED_CORE_CYCLES > > E:Attach to pid 23085 failed: Operation not permitted > > > There may be some issues with ptrace. The current pfmon code stills > uses ptrace to attach/detach from a task. Pin may already be using ptrace. > > I suggest you try with perf_events and the perf tool, see if you have more > luck. > > OK, thanks, I will use perf_events then. Tianwei > > Currently I am still not very clear with Pin, but is there any specially > > flag I need to add in order to monitor Pin with pfmon. I read the Pin > > documents, the three components of Pin (Pin engine, Pin tool, user > > application) should locate in the same address space, I do not know > what's > > the special thing there. > > Thanks. > > Tianwei > > -- > > Sheng, Tianwei > > Inst. of High Performance Computing > > Dept. of Computer Sci. & Tech. > > Tsinghua Univ. > > > > > ------------------------------------------------------------------------------ > > > > > > _______________________________________________ > > perfmon2-devel mailing list > > perfmon2-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/perfmon2-devel > > > > > -- Sheng, Tianwei Inst. of High Performance Computing Dept. of Computer Sci. & Tech. Tsinghua Univ.
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