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perf/core fixes and improvements:

Browse source 
kernel + tools/perf:
 
   Alexey Budankov:
 
   - Introduce CAP_PERFMON to kernel and user space.
 
 callchains:
 
   Adrian Hunter:
 
   - Allow using Intel PT to synthesize callchains for regular events.
 
   Kan Liang:
 
   - Stitch LBR records from multiple samples to get deeper backtraces,
     there are caveats, see the csets for details.
 
 perf script:
 
   Andreas Gerstmayr:
 
   - Add flamegraph.py script
 
 BPF:
 
   Jiri Olsa:
 
   - Synthesize bpf_trampoline/dispatcher ksymbol events.
 
 perf stat:
 
   Arnaldo Carvalho de Melo:
 
   - Honour --timeout for forked workloads.
 
   Stephane Eranian:
 
   - Force error in fallback on :k events, to avoid counting nothing when
     the user asks for kernel events but is not allowed to.
 
 perf bench:
 
   Ian Rogers:
 
   - Add event synthesis benchmark.
 
 tools api fs:
 
   Stephane Eranian:
 
  - Make xxx__mountpoint() more scalable
 
 libtraceevent:
 
   He Zhe:
 
   - Handle return value of asprintf.
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-5.8-20200420' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core fixes and improvements from Arnaldo Carvalho de Melo:

kernel + tools/perf:

  Alexey Budankov:

  - Introduce CAP_PERFMON to kernel and user space.

callchains:

  Adrian Hunter:

  - Allow using Intel PT to synthesize callchains for regular events.

  Kan Liang:

  - Stitch LBR records from multiple samples to get deeper backtraces,
    there are caveats, see the csets for details.

perf script:

  Andreas Gerstmayr:

  - Add flamegraph.py script

BPF:

  Jiri Olsa:

  - Synthesize bpf_trampoline/dispatcher ksymbol events.

perf stat:

  Arnaldo Carvalho de Melo:

  - Honour --timeout for forked workloads.

  Stephane Eranian:

  - Force error in fallback on :k events, to avoid counting nothing when
    the user asks for kernel events but is not allowed to.

perf bench:

  Ian Rogers:

  - Add event synthesis benchmark.

tools api fs:

  Stephane Eranian:

 - Make xxx__mountpoint() more scalable

libtraceevent:

  He Zhe:

  - Handle return value of asprintf.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2020-04-22 14:08:28 +02:00
commit 87cfeb1920
85 changed files with 1855 additions and 517 deletions
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8
include/uapi/linux/capability.h
View file

@ -367,8 +367,14 @@ struct vfs_ns_cap_data {
#define CAP_AUDIT_READ 37
/*
* Allow system performance and observability privileged operations
* using perf_events, i915_perf and other kernel subsystems
*/
#define CAP_LAST_CAP CAP_AUDIT_READ
#define CAP_PERFMON 38
#define CAP_LAST_CAP CAP_PERFMON
#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)