linux-kernel - [PATCH V2 0/6] Add sample_flags to improve the perf_sample

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Message-Id: <20220901130959.1285717-1-kan.liang@linux.intel.com>
Date:   Thu,  1 Sep 2022 06:09:53 -0700
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, acme@...nel.org, mingo@...hat.com,
        eranian@...gle.com, mpe@...erman.id.au,
        linux-kernel@...r.kernel.org
Cc:     ak@...ux.intel.com, andreas.kogler.0x@...il.com,
        atrajeev@...ux.vnet.ibm.com, namhyung@...nel.org,
        ravi.bangoria@....com, Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH V2 0/6] Add sample_flags to improve the perf_sample_data struct

From: Kan Liang <kan.liang@...ux.intel.com>

Changes since V1:
- Update the AMD LBR code in patch 3

The patch series is to fix PEBS timestamps overwritten and improve the
perf_sample_data struct. The detailed discussion can be found at
https://lore.kernel.org/lkml/YwXvGe4%2FQdgGYOKJ@worktop.programming.kicks-ass.net/

The patch series has two changes compared with the suggestions in the
above discussion.
- Only clear the sample flags for the perf_prepare_sample().
  The __perf_event_header__init_id is shared between perf_prepare_sample()
  (used by PERF_RECORD_SAMPLE) and perf_event_header__init_id() (used by
  other PERF_RECORD_* event type). The sample data is only available
  for the PERF_RECORD_SAMPLE.
- The CALLCHAIN_EARLY hack is still required for the BPF, especially
  perf_event_set_bpf_handler(). The sample data is not available when
  the function is invoked.

Kan Liang (6):
  perf: Add sample_flags to indicate the PMU-filled sample data
  perf/x86/intel/pebs: Fix PEBS timestamps overwritten
  perf: Use sample_flags for branch stack
  perf: Use sample_flags for weight
  perf: Use sample_flags for data_src
  perf: Use sample_flags for txn

 arch/powerpc/perf/core-book3s.c | 10 ++++++---
 arch/x86/events/amd/core.c      |  4 +++-
 arch/x86/events/core.c          |  4 +++-
 arch/x86/events/intel/core.c    |  4 +++-
 arch/x86/events/intel/ds.c      | 39 ++++++++++++++++++++++++---------
 include/linux/perf_event.h      | 15 ++++++-------
 kernel/events/core.c            | 30 ++++++++++++++++++-------
 7 files changed, 74 insertions(+), 32 deletions(-)

-- 
2.35.1