From: Ingo Molnar <mingo@kernel.org>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-perf-users@vger.kernel.org
Subject: Re: [PATCH v3] perf bench sched pipe: Add -G/--cgroups option
Date: Mon, 16 Oct 2023 11:35:35 +0200 [thread overview]
Message-ID: <ZS0D53ckVx356k4o@gmail.com> (raw)
In-Reply-To: <20231016044225.1125674-1-namhyung@kernel.org>
* Namhyung Kim <namhyung@kernel.org> wrote:
> + /* try cgroup v2 interface first */
> + if (threaded)
> + fd = openat(cgrp->fd, "cgroup.threads", O_WRONLY);
> + else
> + fd = openat(cgrp->fd, "cgroup.procs", O_WRONLY);
> +
> + /* try cgroup v1 if failed */
> + if (fd < 0)
> + fd = openat(cgrp->fd, "tasks", O_WRONLY);
> +
> + if (fd < 0) {
> + char mnt[PATH_MAX];
> +
> + printf("Failed to open cgroup file in %s\n", cgrp->name);
> +
> + if (cgroupfs_find_mountpoint(mnt, sizeof(mnt), "perf_event") == 0)
> + printf(" Hint: create the cgroup first, like 'mkdir %s/%s'\n",
> + mnt, cgrp->name);
Ok, this works too I suppose.
Acked-by: Ingo Molnar <mingo@kernel.org>
Thanks,
Ingo
next prev parent reply other threads:[~2023-10-16 9:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-16 4:42 [PATCH v3] perf bench sched pipe: Add -G/--cgroups option Namhyung Kim
2023-10-16 9:35 ` Ingo Molnar [this message]
2023-10-16 15:38 ` Arnaldo Carvalho de Melo
2023-10-16 15:45 ` Arnaldo Carvalho de Melo
2023-10-16 15:51 ` Arnaldo Carvalho de Melo
2023-10-16 15:55 ` Arnaldo Carvalho de Melo
2023-10-16 20:34 ` Arnaldo Carvalho de Melo
2023-10-16 21:44 ` Namhyung Kim
2023-10-17 12:09 ` Arnaldo Carvalho de Melo
2023-10-17 11:40 ` Ingo Molnar
2023-10-17 12:28 ` [perf stat] Extend --cpu to non-system-wide runs too? was " Arnaldo Carvalho de Melo
2023-10-17 12:43 ` Ingo Molnar
2023-10-17 18:31 ` Arnaldo Carvalho de Melo
2023-10-17 19:05 ` Namhyung Kim
2023-10-18 12:07 ` Ingo Molnar
2023-10-17 8:06 ` Athira Rajeev
2023-10-16 17:25 ` Athira Rajeev
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