Re: [PATCH v8 0/4] perf: arm-spe: Decode SPE source and use for perf c2c

Arnaldo Carvalho de Melo
2022-05-17T21:21:21Z

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?

thanks!

- Arnaldo

> Changes in v8:
> * Report NA for both mem_lvl and mem_lvl_num for stores where we have no
> information
>
> Changes in v7:
> * Minor change requested by Leo Yan
>
> Changes in v6:
> * Drop changes to c2c command which will come from Leo Yan
>
> Changes in v5:
> * Add a new snooping type to disambiguate cache-to-cache transfers where
> we don't know if the data is clean or dirty.
> * Set snoop flags on all the data-source cases
> * Special case stores as we have no information on them
>
> Changes in v4:
> * Bring-in the kernel's arch/arm64/include/asm/cputype.h into tools/
> * Add neoverse-v1 to the neoverse cores list
>
> Ali Saidi (4):
> tools: arm64: Import cputype.h
> perf arm-spe: Use SPE data source for neoverse cores
> perf mem: Support mem_lvl_num in c2c command
> perf mem: Support HITM for when mem_lvl_num is any
>
> tools/arch/arm64/include/asm/cputype.h | 258 ++++++++++++++++++
> .../util/arm-spe-decoder/arm-spe-decoder.c | 1 +
> .../util/arm-spe-decoder/arm-spe-decoder.h | 12 +
> tools/perf/util/arm-spe.c | 110 +++++++-
> tools/perf/util/mem-events.c | 20 +-
> 5 files changed, 383 insertions(+), 18 deletions(-)
> create mode 100644 tools/arch/arm64/include/asm/cputype.h
>
> --
> 2.32.0

--

- Arnaldo