From: Shakeel Butt <shakeel.butt@linux.dev>
To: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: Waiman Long <longman@redhat.com>,
tj@kernel.org, hannes@cmpxchg.org, lizefan.x@bytedance.com,
cgroups@vger.kernel.org, yosryahmed@google.com,
netdev@vger.kernel.org, linux-mm@kvack.org,
kernel-team@cloudflare.com,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: [PATCH v1] cgroup/rstat: add cgroup_rstat_cpu_lock helpers and tracepoints
Date: Thu, 2 May 2024 12:44:39 -0700 [thread overview]
Message-ID: <4m3x4rtztwxctwlq2pdorgbv2hblylnuc2haz7ni4ti52n57xi@utxkr5ripqp2> (raw)
In-Reply-To: <4a680b80-b296-4466-895a-13239b982c85@kernel.org>
On Wed, May 01, 2024 at 07:22:26PM +0200, Jesper Dangaard Brouer wrote:
>
[...]
>
> More data, the histogram of time spend under the lock have some strange
> variation issues with a group in 4ms to 65ms area. Investigating what
> can be causeing this... which next step depend in these tracepoints.
>
> @lock_cnt: 759146
>
> @locked_ns:
> [1K, 2K) 499 | |
> [2K, 4K) 206928
> |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@|
> [4K, 8K) 147904 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
> [8K, 16K) 64453 |@@@@@@@@@@@@@@@@ |
> [16K, 32K) 135467 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
> [32K, 64K) 75943 |@@@@@@@@@@@@@@@@@@@ |
> [64K, 128K) 38359 |@@@@@@@@@ |
> [128K, 256K) 46597 |@@@@@@@@@@@ |
> [256K, 512K) 32466 |@@@@@@@@ |
> [512K, 1M) 3945 | |
> [1M, 2M) 642 | |
> [2M, 4M) 750 | |
> [4M, 8M) 1932 | |
> [8M, 16M) 2114 | |
> [16M, 32M) 1039 | |
> [32M, 64M) 108 | |
>
Am I understanding correctly that 1K is 1 microsecond and 1M is 1
millisecond? Is it possible to further divide this table into update
side and flush side?
next prev parent reply other threads:[~2024-05-02 19:44 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-01 14:04 Jesper Dangaard Brouer
2024-05-01 14:24 ` Waiman Long
2024-05-01 17:22 ` Jesper Dangaard Brouer
2024-05-01 18:41 ` Waiman Long
2024-05-02 11:23 ` Jesper Dangaard Brouer
2024-05-02 18:19 ` Waiman Long
2024-05-03 14:00 ` Jesper Dangaard Brouer
2024-05-03 14:30 ` Waiman Long
2024-05-03 19:18 ` Shakeel Butt
2024-05-06 12:03 ` Jesper Dangaard Brouer
2024-05-06 16:22 ` Shakeel Butt
2024-05-06 16:28 ` Ivan Babrou
2024-05-06 19:45 ` Shakeel Butt
2024-05-06 19:54 ` Jesper Dangaard Brouer
2024-05-02 19:44 ` Shakeel Butt [this message]
2024-05-03 12:58 ` Jesper Dangaard Brouer
2024-05-03 18:11 ` Shakeel Butt
2024-05-14 5:18 ` Jesper Dangaard Brouer
2024-05-14 5:55 ` Tejun Heo
2024-05-14 16:59 ` Waiman Long
2024-05-15 16:58 ` Tejun Heo
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