diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2017-05-26 11:17:07 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-06-21 11:35:46 -0300 |
| commit | f952eaceb089b691eba7c4e13686e742a8f26bf5 (patch) | |
| tree | b474fda9cee8d4d68eefd5de4e46b5bbb0d9bae2 /tools/perf/scripts/python/stackcollapse.py | |
| parent | ee14ac0ef6827cd6f9a572cc83dd0191ea17812c (diff) | |
perf intel-pt: Ensure never to set 'last_ip' when packet 'count' is zero
Intel PT uses IP compression based on the last IP. For decoding purposes,
'last IP' is not updated when a branch target has been suppressed, which is
indicated by IPBytes == 0. IPBytes is stored in the packet 'count', so
ensure never to set 'last_ip' when packet 'count' is zero.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1495786658-18063-7-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions