Messages in this thread | | | Date | Wed, 18 May 2022 12:16:30 +0800 | From | Leo Yan <> | Subject | Re: [PATCH v8 0/4] perf: arm-spe: Decode SPE source and use for perf c2c |
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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: > > 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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