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| author | Adrian Hunter <adrian.hunter@intel.com> | 2015-08-13 12:40:57 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-09-04 12:01:05 -0300 |
| commit | 86c2786994bd7c0d4b525bbfbe42ac540d0b8166 (patch) | |
| tree | d536022cb55f7d0d3d2d98e7b70ad39f84919dee /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 1b29ac59b1d692c06ec543a5f35e0d9ebb98e003 (diff) | |
| download | linux-86c2786994bd7c0d4b525bbfbe42ac540d0b8166.tar.gz linux-86c2786994bd7c0d4b525bbfbe42ac540d0b8166.tar.bz2 linux-86c2786994bd7c0d4b525bbfbe42ac540d0b8166.zip | |
perf intel-pt: Add support for PERF_RECORD_SWITCH
Add support for selecting and processing PERF_RECORD_SWITCH events for
use by Intel PT. If they are available, they will be used in preference
to sched_switch events.
This enables an unprivileged user to trace multi-threaded or
multi-process workloads with any level of perf_event_paranoid. However
it depends on kernel support for PERF_RECORD_SWITCH.
Without this patch, tracing a multi-threaded workload will decode
without error but all the data will be attributed to the main thread.
Without this patch, tracing a multi-process workload will result in
decoder errors because the decoder will not know which executable is
executing.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1439458857-30636-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions