From: Leo Yan <leo.yan@linux.dev>
To: "?????? (Baisheng Gao)" <baisheng.gao@unisoc.com>
Cc: "jolsa@kernel.org" <jolsa@kernel.org>,
"linux-perf-users@vger.kernel.org"
<linux-perf-users@vger.kernel.org>,
"???? (Hao_hao Wang)" <Hao_hao.Wang@unisoc.com>
Subject: Re: Question about using the perf c2c in UMA system
Date: Tue, 30 Apr 2024 05:43:21 +0800 [thread overview]
Message-ID: <20240429214321.GB125@debian-dev> (raw)
In-Reply-To: <80f723d230744bc299044cfd4f8c4d92@shmbx06.spreadtrum.com>
Hi Baisheng,
On Mon, Apr 08, 2024 at 10:52:59AM +0000, ?????? (Baisheng Gao) wrote:
> Hi linux-perf-users,
>
> My perf tool version is 6.6, and I compiled it to run on an Android system.
> The problem is:
>
> # ./perf c2c report
> Failed setup nodes
>
> According to the articles on the Internet, it seems that the perf c2c is only supported
> in NUMA system. However, the cache false sharing does not exist only in NUMA, and
> the UMA system has also the problem. So I wonder how to support perf c2c in UMA.
The log above is related with parsing NUMA nodes, but this doesn't
mean 'perf c2c' must run on NUMA system. My understanding is both
x86_64 (memory event) and Arm64 (SPE) support 'perf c2c' not only on
NUMA.
Thanks,
Leo
next parent reply other threads:[~2024-04-29 21:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <80f723d230744bc299044cfd4f8c4d92@shmbx06.spreadtrum.com>
2024-04-29 21:43 ` Leo Yan [this message]
2024-04-30 3:40 ` Question about using the perf c2c in UMA system Ian Rogers
2024-04-30 14:36 ` James Clark
2024-04-30 19:32 ` Leo Yan
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