Messages in this thread Patch in this message | | | Date | Thu, 11 Aug 2022 18:55:48 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH v6 01/15] perf tools: sync addition of PERF_MEM_SNOOPX_PEER |
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Em Thu, Aug 11, 2022 at 02:24:37PM +0800, Leo Yan escreveu: > From: Ali Saidi <alisaidi@amazon.com> > > Add a flag to the perf mem data struct to signal that a request caused a > cache-to-cache transfer of a line from a peer of the requestor and > wasn't sourced from a lower cache level. The line being moved from one > peer cache to another has latency and performance implications. On Arm64 > Neoverse systems the data source can indicate a cache-to-cache transfer > but not if the line is dirty or clean, so instead of overloading HITM > define a new flag that indicates this type of transfer. > > Signed-off-by: Ali Saidi <alisaidi@amazon.com> > Reviewed-by: Leo Yan <leo.yan@linaro.org>
I'm adding a:
Signed-off-by: Leo Yan <leo.yan@linaro.org>
To the patches you're sending that you are not the original author, as per defined in:
Documentation/process/submitting-patches.rst
--- The Signed-off-by: tag indicates that the signer was involved in the development of the patch, or that he/she was in the patch's delivery path. ---
If you disagree and want to retract the patch, please let me know, this so far is speculative and is only on my local branch for testing.
- Arnaldo
> --- > tools/include/uapi/linux/perf_event.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h > index 4653834f078f..e2b77fbca91e 100644 > --- a/tools/include/uapi/linux/perf_event.h > +++ b/tools/include/uapi/linux/perf_event.h > @@ -1310,7 +1310,7 @@ union perf_mem_data_src { > #define PERF_MEM_SNOOP_SHIFT 19 > > #define PERF_MEM_SNOOPX_FWD 0x01 /* forward */ > -/* 1 free */ > +#define PERF_MEM_SNOOPX_PEER 0x02 /* xfer from peer */ > #define PERF_MEM_SNOOPX_SHIFT 38 > > /* locked instruction */ > -- > 2.34.1
--
- Arnaldo
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