Hi Joe,

On Tue, May 17, 2022 at 06:20:03PM -0300, Arnaldo Carvalho de Melo wrote:

Em Tue, May 17, 2022 at 02:03:21AM +0000, Ali Saidi escreveu:

quoted

When synthesizing data from SPE, augment the type with source information
for Arm Neoverse cores so we can detect situtions like cache line
contention and transfers on Arm platforms. 

This changes enables future changes to c2c on a system with SPE where lines that
are shared among multiple cores show up in perf c2c output. 

Changes is v9:
 * Change reporting of remote socket data which should make Leo's upcomping
   patch set for c2c make sense on multi-socket platforms  

Hey,

	Joe Mario, who is one of 'perf c2c' authors asked me about some
git tree he could clone from for both building the kernel and
tools/perf/ so that he could do tests, can you please provide that?

I have uploaded the latest patches for enabling 'perf c2c' on Arm SPE
on the repo:

https://git.linaro.org/people/leo.yan/linux-spe.git branch: perf_c2c_arm_spe_peer_v3

Below are the quick notes for build the kernel with enabling Arm SPE:

  $ git clone -b perf_c2c_arm_spe_peer_v3 https://git.linaro.org/people/leo.yan/linux-spe.git

  Or

  $ git clone -b perf_c2c_arm_spe_peer_v3 ssh://git@git.linaro.org/people/leo.yan/linux-spe.git

  $ cd linux-spe

  # Build kernel
  $ make defconfig
  $ ./scripts/config -e CONFIG_PID_IN_CONTEXTIDR
  $ ./scripts/config -e CONFIG_ARM_SPE_PMU
  $ make Image

  # Build perf
  $ cd tools/perf
  $ make VF=1 DEBUG=1

When boot the kernel, please add option "kpti=off" in kernel command
line, you might need to update grub menu for this.

Please feel free let us know if anything is not clear for you.

Thank you,
Leo

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