Jiri Olsa f57b05ed53 perf report: Use properly build_id kernel binaries ... If we bring the recorded perf data together with kernel binary from another machine using: on server A: perf archive on server B: tar xjvf perf.data.tar.bz2 -C ~/.debug the build_id kernel dso is not properly recognized during the "perf report" command on server B. The reason is, that build_id dsos are added during the session initialization, while the kernel maps are created during the sample event processing. The machine__create_kernel_maps functions ends up creating new dso object for kernel, but it does not check if we already have one added by build_id processing. Also the build_id reading ABI quirk added in commit: - commit b25114817a perf build-id: Add quirk to deal with perf.data file format breakage populates the "struct build_id_event::pid" with 0, which is later interpreted as DEFAULT_GUEST_KERNEL_ID. This is not always correct, so it's better to guess the pid value based on the "struct build_id_event::header::misc" value. - Tested with data generated on x86 kernel version v2.6.34 and reported back on x86_64 current kernel. - Not tested for guest kernel case. Note the problem stays for PERF_RECORD_MMAP events recorded by perf that does not use proper pid (HOST_KERNEL_ID/DEFAULT_GUEST_KERNEL_ID). They are misinterpreted within the current perf code. Probably there's not much we can do about that. Cc: Avi Kivity <avi@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yanmin Zhang <yanmin_zhang@linux.intel.com> Link: http://lkml.kernel.org/r/20110601194346.GB1934@jolsa.brq.redhat.com Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2011-08-11 08:58:03 -03:00
..
firewire	tools/firewire: nosy-dump: increment program version	2010-07-27 11:04:12 +02:00
perf	perf report: Use properly build_id kernel binaries	2011-08-11 08:58:03 -03:00
power/x86	Merge branch 'master' into for-next	2011-04-26 10:22:59 +02:00
slub	slub: move slabinfo.c to tools/slub/slabinfo.c	2010-11-06 09:04:32 +02:00
testing/ktest	ktest: Ignore unset values of the minconfig in config_bisect	2011-06-02 11:57:57 -04:00
usb	USB: ffs-test: fix header path	2011-02-28 19:27:12 -08:00
virtio	virtio_test: support event index	2011-05-30 11:14:15 +09:30