linux

iv/linux

History

Adrian Hunter 86c2786994 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>

2015-09-04 12:01:05 -03:00

alpha

perf tools: Add empty Build files for architectures lacking them

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

arm

perf build: Add arch arm objects building

2015-02-12 13:13:01 -03:00

arm64

perf tools: Add ARM64 perf_regs_load to support libunwind and enable testing

2015-05-29 12:43:40 -03:00

mips

perf tools: Add empty Build files for architectures lacking them