Naveen N. Rao a4a03fc7ef perf evsel: Fix an issue where perf report fails to show the proper percentage ... This patch fixes an issue where perf report shows nan% for certain perf.data files. The below is from a report for a do_fork probe: -nan% sshd [kernel.kallsyms] [k] do_fork -nan% packagekitd [kernel.kallsyms] [k] do_fork -nan% dbus-daemon [kernel.kallsyms] [k] do_fork -nan% bash [kernel.kallsyms] [k] do_fork A git bisect shows commit f3bda2c as the cause. However, looking back through the git history, I saw commit 640c03c which seems to have removed the required initialization for perf_sample->period. The problem only started showing after commit f3bda2c. The below patch re-introduces the initialization and it fixes the problem for me. With the below patch, for the same perf.data: 73.08% bash [kernel.kallsyms] [k] do_fork 8.97% 11-dhclient [kernel.kallsyms] [k] do_fork 6.41% sshd [kernel.kallsyms] [k] do_fork 3.85% 20-chrony [kernel.kallsyms] [k] do_fork 2.56% sendmail [kernel.kallsyms] [k] do_fork This patch applies over current linux-tip commit 9949284. Problem introduced in: $ git describe 640c03c v2.6.37-rc3-83-g640c03c Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Richter <robert.richter@amd.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: stable@kernel.org Link: http://lkml.kernel.org/r/20120203170113.5190.25558.stgit@localhost6.localdomain6 Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2012-02-06 18:59:38 -02:00
..
firewire	…
hv	Staging: hv: move hyperv code out of staging directory	2011-10-10 22:52:55 -06:00
lguest	lguest: move the lguest tool to the tools directory	2012-01-12 15:44:47 +10:30
nfsd	NFSD: Added fault injection script	2011-11-07 21:10:47 -05:00
perf	perf evsel: Fix an issue where perf report fails to show the proper percentage	2012-02-06 18:59:38 -02:00
power	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux	2012-01-18 15:51:48 -08:00
slub	Merge branches 'slab/next' and 'slub/partial' into slab/for-linus	2011-10-26 18:09:12 +03:00
testing	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest	2012-01-16 17:53:27 -08:00
usb	USB: ffs-test: fix header path	2011-02-28 19:27:12 -08:00
virtio	virtio: rename virtqueue_add_buf_gfp to virtqueue_add_buf	2012-01-12 15:44:42 +10:30