linux-kernel - [PATCH 00/10] perf/uprobe: Optimize uprobes

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Message-Id: <20240708091241.544262971@infradead.org>
Date: Mon, 08 Jul 2024 11:12:41 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: mingo@...nel.org,
 andrii@...nel.org
Cc: linux-kernel@...r.kernel.org,
 peterz@...radead.org,
 rostedt@...dmis.org,
 mhiramat@...nel.org,
 oleg@...hat.com,
 jolsa@...nel.org,
 clm@...a.com,
 paulmck@...nel.org
Subject: [PATCH 00/10] perf/uprobe: Optimize uprobes

Hi!

These patches implement the (S)RCU based proposal to optimize uprobes.

On my c^Htrusty old IVB-EP -- where each (of the 40) CPU calls 'func' in a
tight loop:

  perf probe -x ./uprobes test=func
  perf stat -ae probe_uprobe:test  -- sleep 1

  perf probe -x ./uprobes test=func%return
  perf stat -ae probe_uprobe:test__return -- sleep 1

PRE:

  4,038,804      probe_uprobe:test
  2,356,275      probe_uprobe:test__return

POST:

  7,216,579      probe_uprobe:test
  6,744,786      probe_uprobe:test__return


Patches also available here:

  git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/uprobes