Hello, I am having difficulties while trying to archive the performance information from one machine so I can parse it on another. Here is my setup:
I have two machines, say m1 and m2 and I want to profile my executable on m1 and see the report on m2. Both m1 and m2 run the same OS: CentOS 6: $uname -a Linux florin-vm-cent6 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux I run my perf record this way: $sudo perf record -g -a mytest After the recording is done when I check the build-ids collected in the report I see only the system modules in there: $ sudo perf buildid-list -i perf.data 3dfb468e07d40879575e016e8999a25ee2694792 [kernel.kallsyms] caea6ee6167bf7c214c1008179879ff8ac2447b6 /lib/modules/2.6.32-279.el6.x86_64/kernel/fs/ext4/ext4.ko 2eba2e1710dd909986d1a5f5b27720f476fc6a74 /lib/modules/2.6.32-279.el6.x86_64/kernel/fs/jbd2/jbd2.ko 4c37e276cd23f0877af7587ed1f699aadb741ec9 /lib64/libc-2.12.so 48a9f8600f0a15f6418ede25846c324ec8891dd4 /lib64/libpthread-2.12.so 42aefafc23375dc250c49c420c37edc4515b9c02 /lib64/ld-2.12.so bf14593d7915402aa62c2573fccdb252aeebf754 /lib64/libm-2.12.so ee85ac5f03ac14df9dcc93b6b57cb65a208f1933 /lib64/libgobject-2.0.so.0.2200.5 545c98f5fd1fb2c21bf35c621d9760e698dce1f8 /usr/lib64/libXrender.so.1.3.0 b88f3388cedb5fd906faccbb3febd81cf541273c /usr/bin/Xorg 2b40e6807e9482617b35b1c4a7e6e908a0e1bfc6 /usr/lib64/libpixman-1.so.0.18.4 91fd6a6700be179c5679b23ea0908f0b10e82537 /usr/lib64/xorg/modules/libfb.so bfaebdeecb20d4e8a842a4b3daeab93bbd3caaf3 /usr/lib64/libcairo.so.2.10800.8 8f5f1b5e9d1b4ca655c88c84704b3b9b705c245f /usr/lib64/libvte.so.9.2501.0 534663464360e8d2157395f397352d28742ba45e /usr/bin/perf d578a8e6cf05018d25168822e4cdfd780abf4a4e /usr/sbin/lsof The funny thing is that "perf report -g" gives me symbols for mytest binary and all its shared libs like it is reading it from someplace else. I compiled my code with -fno-omit-frame-pointer and "-Wl,--build-id". If I issue a "sudo perf archive" and then expand the archive file that was generated I see the same files as above in the archive (i.e. none of my binaries). After moving the perf file and the symbol archive to m2 and use perf report on it I see symbols only for the kernel and system libraries. So it seems that "perf archive" doesn't store all the information that "perf report" is able to read on m1 so when I try to generate a report on m2 from the samples collected on m1 I miss the symbols for my binaries. Thanks in advance for shedding any light on this issue. The new perf tools seems very cool - I just wish there would be more information online for it. Florin -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
