linux-hardened/tools
David Ahern 7c0f4a4113 perf kvm: Guest userspace samples should not be lumped with host uspace
e.g., perf kvm --host  --guest report -i perf.data --stdio -D
shows:

1 599127912065356 0x143b8 [0x48]: PERF_RECORD_SAMPLE(IP, 5): 5671/5676: 0x7fdf95a061c0 period: 1 addr: 0
... chain: nr:2
.....  0: ffffffffffffff80
.....  1: fffffffffffffe00
 ... thread: qemu-kvm:5671
 ...... dso: <not found>

(IP, 5) means sample in guest userspace. Those samples should not be lumped
into the VMM's host thread. i.e, the report output:

    56.86%  qemu-kvm  [unknown]         [u] 0x00007fdf95a061c0

With this patch the output emphasizes it is a guest userspace hit:

    56.86%  [guest/5671]  [unknown]         [u] 0x00007fdf95a061c0

Looking at 3 VMs (2 64-bit, 1 32-bit) with each running a CPU bound
process (openssl speed), perf report currently shows:

  93.84%  117726   qemu-kvm  [unknown]   [u] 0x00007fd7dcaea8e5

which is wrong. With this patch you get:

  31.50%   39258   [guest/18772]  [unknown]   [u] 0x00007fd7dcaea8e5
  31.50%   39236   [guest/11230]  [unknown]   [u] 0x0000000000a57340
  30.84%   39232   [guest/18395]  [unknown]   [u] 0x00007f66f641e107

Tested-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1342826756-64663-4-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-07-25 11:29:46 -03:00
..
firewire tools/firewire: nosy-dump: increment program version 2010-07-27 11:04:12 +02:00
hv Tools: hv: verify origin of netlink connector message 2012-06-10 00:29:46 +09:00
include/tools tools/include: Add byteshift headers for endian access 2012-02-28 10:22:51 -08:00
lguest lguest: move the lguest tool to the tools directory 2012-01-12 15:44:47 +10:30
lib/traceevent tools lib traceevent: Cleanup realloc use 2012-07-04 13:40:31 +09:00
nfsd NFSD: Added fault injection script 2011-11-07 21:10:47 -05:00
perf perf kvm: Guest userspace samples should not be lumped with host uspace 2012-07-25 11:29:46 -03:00
power tools/power turbostat: fix IVB support 2012-06-03 23:47:49 -04:00
scripts perf: Build libtraceevent.a 2012-04-25 13:01:40 +02:00
testing syscalls, x86: add __NR_kcmp syscall 2012-05-31 17:49:32 -07:00
usb USB: testusb: add path /dev/bus/usb to default search paths for usbfs 2012-05-15 08:41:13 -07:00
virtio virtio/tools: add delayed interupt mode 2012-05-02 18:22:14 +03:00
vm tools/vm/page-types.c: cleanups 2012-05-29 16:22:21 -07:00
Makefile tools: Connect to the kernel build system 2012-04-11 15:00:17 -03:00