Messages in this thread | | | From | Leo Yan <> | Subject | [PATCH v4 0/6] perf arm-spe: Enable timestamp | Date | Mon, 12 Apr 2021 17:10:00 +0800 |
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This patch set is to enable timestamp for Arm SPE trace. It reads out TSC parameters from the TIME_CONV event, the parameters are used for conversion between timer counter and kernel time and which is applied for Arm SPE samples.
This version dropped the change for adding hardware clock parameters into auxtrace info, alternatively, it utilizes the TIME_CONV event to extract the clock parameters which is used for timestamp calculation.
This patch set can be clearly applied on perf/core branch with:
commit 2c0cb9f56020 ("perf test: Add a shell test for 'perf stat --bpf-counters' new option")
Ths patch series has been tested on Hisilicon D06 platform.
Changes from v3: * Let to be backwards-compatible for TIME_CONV event (Adrian).
Changes from v2: * Changed to use TIME_CONV event for extracting clock parameters (Al).
Changes from v1: * Rebased patch series on the latest perf/core branch; * Fixed the patch for dumping TSC parameters to support both the older and new auxtrace info format.
Leo Yan (6): perf arm-spe: Remove unused enum value ARM_SPE_PER_CPU_MMAPS perf arm-spe: Save clock parameters from TIME_CONV event perf arm-spe: Convert event kernel time to counter value perf arm-spe: Assign kernel time to synthesized event perf arm-spe: Bail out if the trace is later than perf event perf arm-spe: Don't wait for PERF_RECORD_EXIT event
tools/perf/util/arm-spe.c | 74 +++++++++++++++++++++++++++++++++------ tools/perf/util/arm-spe.h | 1 - 2 files changed, 64 insertions(+), 11 deletions(-)
-- 2.25.1
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