From: wuqiang <wuqiang.matt@bytedance.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: mhiramat@kernel.org, davem@davemloft.net,
anil.s.keshavamurthy@intel.com, naveen.n.rao@linux.ibm.com,
rostedt@goodmis.org, peterz@infradead.org, sander@svanheule.net,
ebiggers@google.com, dan.j.williams@intel.com,
jpoimboe@kernel.org, linux-kernel@vger.kernel.org,
mattwu@163.com, kernel test robot <lkp@intel.com>
Subject: Re: [PATCH v4] kprobes,lib: kretprobe scalability improvement
Date: Fri, 4 Nov 2022 00:46:55 +0800 [thread overview]
Message-ID: <3fb41114-4ccf-bfc2-dc02-9379aec0415e@bytedance.com> (raw)
In-Reply-To: <20221102143312.a1b09fe962e8e1057fd4a872@linux-foundation.org>
On 2022/11/3 05:33, Andrew Morton wrote:
> On Wed, 2 Nov 2022 10:30:12 +0800 wuqiang <wuqiang.matt@bytedance.com> wrote:
>
>> Tests of
>> kretprobe throughput show the biggest ratio as 333.9x of the original
>> freelist.
>
> Seriously.
>
> I'll add this for some runtime testing.
Thanks.
>
> Are you able to identify other parts of the kernel which could use
> (and benefit from) the new objpool?
The scalability issue is caused by freelist. Currently kretprobe and rethook
are the only use cases.
I'm working on the evaluation of bpf percpu-freelist, which scales well but
uses raw_spinlock and needs local irq disabled.
next prev parent reply other threads:[~2022-11-03 16:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-01 1:43 [PATCH v3] " wuqiang
2022-11-01 12:27 ` kernel test robot
2022-11-02 2:30 ` [PATCH v4] " wuqiang
2022-11-02 21:33 ` Andrew Morton
2022-11-03 16:46 ` wuqiang [this message]
2022-11-03 2:51 ` Masami Hiramatsu
2022-11-03 16:45 ` wuqiang
2022-11-04 1:28 ` Masami Hiramatsu
2022-11-06 5:34 ` [PATCH v5 0/4] lib,kprobes: " wuqiang
2022-11-06 5:34 ` [PATCH v5 1/4] lib: objpool added: ring-array based lockless MPMC queue wuqiang
2022-11-06 5:34 ` [PATCH v5 2/4] lib: objpool test module added wuqiang
2022-11-06 5:34 ` [PATCH v5 3/4] kprobes: kretprobe scalability improvement with objpool wuqiang
2022-11-06 5:34 ` [PATCH v5 4/4] kprobes: freelist.h removed wuqiang
2022-11-08 7:14 ` [PATCH v6 0/4] lib,kprobes: kretprobe scalability improvement wuqiang
2022-11-08 7:14 ` [PATCH v6 1/4] lib: objpool added: ring-array based lockless MPMC queue wuqiang
2022-11-14 15:54 ` Masami Hiramatsu
2022-11-16 10:42 ` wuqiang
2022-11-08 7:14 ` [PATCH v6 2/4] lib: objpool test module added wuqiang
2022-11-08 7:14 ` [PATCH v6 3/4] kprobes: kretprobe scalability improvement with objpool wuqiang
2022-11-14 15:56 ` Masami Hiramatsu
2022-11-14 15:56 ` Masami Hiramatsu
2022-11-16 10:49 ` wuqiang
2022-11-08 7:14 ` [PATCH v6 4/4] kprobes: freelist.h removed wuqiang
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