From: Peter Zijlstra <peterz@infradead.org>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
mingo@kernel.org, andrii@kernel.org,
linux-kernel@vger.kernel.org, rostedt@goodmis.org,
oleg@redhat.com, jolsa@kernel.org, clm@meta.com,
paulmck@kernel.org, bpf <bpf@vger.kernel.org>,
willy@infradead.org
Subject: Re: [PATCH 00/10] perf/uprobe: Optimize uprobes
Date: Tue, 9 Jul 2024 11:01:53 +0200 [thread overview]
Message-ID: <20240709090153.GF27299@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <CAEf4BzY6tXrDGkW6mkxCY551pZa1G+Sgxeuex==nvHUEp9ynpg@mail.gmail.com>
On Mon, Jul 08, 2024 at 05:25:14PM -0700, Andrii Nakryiko wrote:
> Quick profiling for the 8-threaded benchmark shows that we spend >20%
> in mmap_read_lock/mmap_read_unlock in find_active_uprobe. I think
> that's what would prevent uprobes from scaling linearly. If you have
> some good ideas on how to get rid of that, I think it would be
> extremely beneficial.
That's find_vma() and friends. I started RCU-ifying that a *long* time
ago when I started the speculative page fault patches. I sorta lost
track of that effort, Willy where are we with that?
Specifically, how feasible would it be to get a simple RCU based
find_vma() version sorted these days?
next prev parent reply other threads:[~2024-07-09 9:02 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-08 9:12 [PATCH 00/10] perf/uprobe: Optimize uprobes Peter Zijlstra
2024-07-08 9:12 ` [PATCH 01/10] perf/uprobe: Re-indent labels Peter Zijlstra
2024-07-08 9:12 ` [PATCH 02/10] perf/uprobe: Remove spurious whitespace Peter Zijlstra
2024-07-08 9:12 ` [PATCH 03/10] rbtree: Provide rb_find_rcu() / rb_find_add_rcu() Peter Zijlstra
2024-07-10 1:29 ` Masami Hiramatsu
2024-07-10 7:55 ` Peter Zijlstra
2024-07-10 14:05 ` Masami Hiramatsu
2024-07-08 9:12 ` [PATCH 04/10] perf/uprobe: RCU-ify find_uprobe() Peter Zijlstra
2024-07-08 16:35 ` Oleg Nesterov
2024-07-08 18:08 ` Peter Zijlstra
2024-07-09 14:32 ` Oleg Nesterov
2024-07-09 15:02 ` Peter Zijlstra
2024-07-09 15:23 ` Oleg Nesterov
2024-07-08 9:12 ` [PATCH 05/10] perf/uprobe: SRCU-ify uprobe->consumer list Peter Zijlstra
2024-07-09 12:05 ` Peter Zijlstra
2024-07-09 13:33 ` Oleg Nesterov
2024-07-09 14:32 ` Peter Zijlstra
2024-07-09 15:05 ` Oleg Nesterov
2024-07-09 15:19 ` Peter Zijlstra
2024-07-09 15:34 ` Oleg Nesterov
2024-07-09 14:32 ` Peter Zijlstra
2024-07-08 9:12 ` [PATCH 06/10] perf/uprobe: Split uprobe_unregister() Peter Zijlstra
2024-07-10 1:40 ` Masami Hiramatsu
2024-07-08 9:12 ` [PATCH 07/10] perf/uprobe: Convert (some) uprobe->refcount to SRCU Peter Zijlstra
2024-07-08 9:12 ` [PATCH 08/10] srcu: Add __srcu_clone_read_lock() Peter Zijlstra
2024-07-10 5:48 ` Boqun Feng
2024-07-10 10:02 ` Peter Zijlstra
2024-07-10 12:05 ` Peter Zijlstra
2024-07-08 9:12 ` [PATCH 09/10] perf/uprobe: Convert single-step and uretprobe to SRCU Peter Zijlstra
2024-07-08 9:12 ` [PATCH 10/10] perf/uprobe: Add uretprobe timer Peter Zijlstra
2024-07-08 22:56 ` [PATCH 00/10] perf/uprobe: Optimize uprobes Masami Hiramatsu
2024-07-09 0:25 ` Andrii Nakryiko
2024-07-09 9:01 ` Peter Zijlstra [this message]
2024-07-09 14:11 ` Paul E. McKenney
2024-07-09 14:29 ` Peter Zijlstra
2024-07-09 14:36 ` Paul E. McKenney
2024-07-09 15:31 ` Peter Zijlstra
2024-07-09 15:56 ` Paul E. McKenney
2024-07-09 16:10 ` Matthew Wilcox
2024-07-09 16:30 ` Matthew Wilcox
2024-07-09 16:57 ` Paul E. McKenney
2024-07-10 9:16 ` Peter Zijlstra
2024-07-10 9:40 ` Peter Zijlstra
2024-07-22 19:09 ` Suren Baghdasaryan
2024-07-27 0:20 ` Andrii Nakryiko
2024-07-27 1:29 ` Suren Baghdasaryan
2024-07-27 3:45 ` Matthew Wilcox
2024-07-30 3:18 ` Andrii Nakryiko
2024-07-30 13:10 ` Peter Zijlstra
2024-07-30 18:10 ` Suren Baghdasaryan
2024-08-03 5:47 ` Andrii Nakryiko
2024-08-03 8:53 ` Peter Zijlstra
2024-08-04 23:22 ` Andrii Nakryiko
2024-08-06 4:08 ` Andrii Nakryiko
2024-08-06 14:50 ` Suren Baghdasaryan
2024-08-06 17:40 ` Andrii Nakryiko
2024-08-06 17:44 ` Suren Baghdasaryan
2024-08-07 1:36 ` Suren Baghdasaryan
2024-08-07 5:13 ` Suren Baghdasaryan
2024-08-07 17:49 ` Andrii Nakryiko
2024-08-07 18:04 ` Suren Baghdasaryan
2024-08-07 18:30 ` Andrii Nakryiko
2024-08-07 18:33 ` Suren Baghdasaryan
2024-08-08 0:47 ` Andrii Nakryiko
2024-07-30 13:46 ` Peter Zijlstra
2024-07-30 18:16 ` Suren Baghdasaryan
2024-07-09 16:42 ` Andrii Nakryiko
2024-07-09 9:03 ` Peter Zijlstra
2024-07-09 10:01 ` Jiri Olsa
2024-07-09 10:16 ` Peter Zijlstra
2024-07-09 22:10 ` Masami Hiramatsu
2024-07-10 10:10 ` Peter Zijlstra
2024-07-10 14:56 ` Masami Hiramatsu
2024-07-10 18:40 ` Andrii Nakryiko
2024-07-11 8:51 ` Peter Zijlstra
2024-07-11 15:17 ` Masami Hiramatsu
2024-07-11 15:22 ` Peter Zijlstra
2024-07-11 17:47 ` Steven Rostedt
2024-07-11 23:59 ` Masami Hiramatsu
2024-07-10 0:55 ` Masami Hiramatsu
2024-07-09 21:47 ` Andrii Nakryiko
2024-07-10 10:12 ` Peter Zijlstra
2024-07-10 12:34 ` Peter Zijlstra
2024-07-09 7:11 ` Peter Zijlstra
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