From: Leo Yan <leo.yan@arm.com>
To: James Clark <james.clark@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>,
Mike Leach <mike.leach@arm.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
Ian Rogers <irogers@google.com>, Amir Ayupov <aaupov@meta.com>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Paschalis Mpeis <Paschalis.Mpeis@arm.com>,
coresight@lists.linaro.org, linux-perf-users@vger.kernel.org,
linux-kernel@vger.kernel.org,
Arnaldo Carvalho de Melo <acme@redhat.com>,
linux-doc@vger.kernel.org
Subject: Re: [PATCH v2 03/18] perf test: Add a workload that forces context switches
Date: Wed, 3 Jun 2026 12:06:21 +0100 [thread overview]
Message-ID: <20260603110621.GR101133@e132581.arm.com> (raw)
In-Reply-To: <20260602-james-cs-context-tracking-fix-v2-3-85b5ce6f55c6@linaro.org>
On Tue, Jun 02, 2026 at 03:26:45PM +0100, James Clark wrote:
[...]
> +/* Not static to avoid LTO clobbering the function name */
> +void context_switch_loop_proc1(int in_fd, int out_fd);
> +noinline void context_switch_loop_proc1(int in_fd, int out_fd)
> +{
> + for (int i = 0; i < loops; i++) {
> + read_block(in_fd);
> + context_switch_loop_work += i * 3;
> + write_block(out_fd);
> + }
> +}
Rather than struggling with unexpected options, and "noinline" might
not work as it is not a standard compiler option (it is defined in
kernel header as AI reminded me), wouldn't it is reliable to use a
dedicated CFLAG rule same as other programs?
Thanks,
Leo
next prev parent reply other threads:[~2026-06-03 11:06 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-02 14:26 [PATCH v2 00/18] perf cs-etm: Queue context packets for frontend James Clark
2026-06-02 14:26 ` [PATCH v2 01/18] " James Clark
2026-06-03 9:08 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 02/18] perf test: Add workload-ctl option James Clark
2026-06-03 10:40 ` Leo Yan
2026-06-03 10:46 ` James Clark
2026-06-03 10:50 ` Leo Yan
2026-06-03 19:21 ` Arnaldo Carvalho de Melo
2026-06-03 19:22 ` Arnaldo Carvalho de Melo
2026-06-02 14:26 ` [PATCH v2 03/18] perf test: Add a workload that forces context switches James Clark
2026-06-03 11:06 ` Leo Yan [this message]
2026-06-03 11:17 ` James Clark
2026-06-02 14:26 ` [PATCH v2 04/18] perf test cs-etm: Test process attribution James Clark
2026-06-03 11:10 ` Leo Yan
2026-06-03 11:20 ` James Clark
2026-06-02 14:26 ` [PATCH v2 05/18] perf test: Add deterministic workload James Clark
2026-06-03 11:27 ` Leo Yan
2026-06-03 13:10 ` James Clark
2026-06-03 13:43 ` Leo Yan
2026-06-03 15:53 ` James Clark
2026-06-02 14:26 ` [PATCH v2 06/18] perf test cs-etm: Replace unroll loop thread with deterministic decode test James Clark
2026-06-03 14:08 ` Leo Yan
2026-06-03 16:01 ` James Clark
2026-06-03 17:08 ` Leo Yan
2026-06-04 13:21 ` James Clark
2026-06-02 14:26 ` [PATCH v2 07/18] perf test cs-etm: Remove asm_pure_loop test James Clark
2026-06-03 14:10 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 08/18] perf test cs-etm: Replace memcpy test with raw dump stress test James Clark
2026-06-03 14:36 ` Leo Yan
2026-06-03 16:11 ` James Clark
2026-06-03 18:16 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 09/18] perf test: Add named_threads workload James Clark
2026-06-03 14:54 ` Leo Yan
2026-06-03 16:12 ` James Clark
2026-06-03 17:36 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 10/18] perf test cs-etm: Test decoding for concurrent threads test James Clark
2026-06-03 14:56 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 11/18] perf test cs-etm: Remove duplicate branch tests James Clark
2026-06-03 17:11 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 12/18] perf test cs-etm: Reduce snapshot size James Clark
2026-06-03 17:12 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 13/18] perf test cs-etm: Speed up basic test James Clark
2026-06-03 17:17 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 14/18] perf test cs-etm: Remove unused Coresight workloads James Clark
2026-06-03 17:25 ` Leo Yan
2026-06-04 13:31 ` James Clark
2026-06-04 13:34 ` James Clark
2026-06-02 14:26 ` [PATCH v2 15/18] perf test cs-etm: Make disassembly test use kcore James Clark
2026-06-03 17:32 ` Leo Yan
2026-06-04 12:18 ` James Clark
2026-06-02 14:26 ` [PATCH v2 16/18] perf test cs-etm: Add all branch instructions to test James Clark
2026-06-03 17:49 ` Leo Yan
2026-06-02 14:26 ` [PATCH v2 17/18] perf test cs-etm: Speed up disassembly test James Clark
2026-06-03 17:50 ` Leo Yan
2026-06-02 14:27 ` [PATCH v2 18/18] perf test cs-etm: Move existing tests to coresight folder James Clark
2026-06-03 18:02 ` Leo Yan
2026-06-04 12:22 ` James Clark
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