Em Tue, Mar 10, 2020 at 01:43:05PM +0800, Leo Yan escreveu:

Hi Arnaldo,

On Wed, Feb 19, 2020 at 10:18:06AM +0800, Leo Yan wrote:

quoted

This patch series is to address issues for synthesizing instruction
samples, especially when the instruction sample period is small enough,
the current logic cannot synthesize multiple instruction samples within
one instruction range packet.

Patch 0001 is to swap packets for instruction samples, so this allow
option '--itrace=iNNN' can work well.

Patch 0002 avoids to reset the last branches for every instruction
sample; if reset the last branches for every time generating sample, the
later samples in the same range packet cannot use the last branches
anymore.

Patch 0003 is the fixing for handling different instruction periods,
especially for small sample period.

Patch 0004 is an optimization for copying last branches; it only copies
last branches once if the instruction samples share the same last
branches.

Patch 0005 is a minor fix for unsigned variable comparison to zero.

This patch set has been rebased on the latest perf/core branch; and
verified on Juno board with below commands:

  # perf script --itrace=i2
  # perf script --itrace=i2il16
  # perf inject --itrace=i2il16 -i perf.data -o perf.data.new
  # perf inject --itrace=i100il16 -i perf.data -o perf.data.new

Could you pick up this patch set?  I confirmed this patch set can
cleanly apply on top of the latest mainline kernel (5.6-rc5).

Or if you want me to resend this patch set, please feel free let me
know.  Thanks!

Thanks, all build tested on x86 and arm64 (with CORESIGHT=1, etc), applied.

- Arnaldo

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