linux

iv/linux

History

Adrian Hunter 75bcb8776d perf intel-pt: Fix recording PEBS-via-PT with registers

When recording PEBS-via-PT, the kernel will not accept the intel_pt
event with register sampling e.g.

 # perf record --kcore -c 10000 -e '{intel_pt/branch=0/,branch-loads/aux-output/ppp}' -I -- ls -l
 Error:
 intel_pt/branch=0/: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'

Fix by suppressing register sampling on the intel_pt evsel.

Committer notes:

Adrian informed that this is only available from Tremont onwards, so on
older processors the error continues the same as before.

Fixes: 9e64cefe4335b ("perf intel-pt: Process options for PEBS event synthesis")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Luwei Kang <luwei.kang@intel.com>
Link: http://lore.kernel.org/lkml/20200630133935.11150-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2020-07-06 09:03:39 -03:00

alpha

perf tools: Add empty Build files for architectures lacking them

2015-08-06 16:24:15 -03:00

arc/annotate

perf annotate: Introduce basic support for ARC

2018-12-17 14:59:42 -03:00

arm

perf record: Respect --no-switch-events

2020-05-28 11:33:36 -03:00

arm64

perf libdw: Fix off-by 1 relative directory includes