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perf 样本太长，请降低 kernel.perf_event_max_sample_rate

Solution In Progress - Updated -

Issue

使用 perf 时，以下消息会出现在内核的日志中：

perf samples too long (2506 > 2500), lowering kernel.perf_event_max_sample_rate to 50000

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

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