From: Tom de Vries via Gdb-patches <gdb-patches@sourceware.org>
To: Tom Tromey <tom@tromey.com>
Cc: Pedro Alves <pedro@palves.net>,
Tom de Vries via Gdb-patches <gdb-patches@sourceware.org>
Subject: Re: [PATCH][gdbsupport] Use task size in parallel_for_each
Date: Sat, 23 Jul 2022 08:51:55 +0200 [thread overview]
Message-ID: <f79bb763-aec8-4fa4-f063-ac119f85764f@suse.de> (raw)
In-Reply-To: <87zgh0sv13.fsf@tromey.com>
On 7/22/22 23:21, Tom Tromey wrote:
> Tom> Then, rather than using parallel_for, the DWARF reader could send N jobs
> Tom> to the thread pool, and each job would simply take the next available CU
> Tom> by incrementing an atomic counter. When the counter reached the number
> Tom> of CUs, a job would stop.
>
> Here's a patch. I didn't test it much, though according to "maint time 1",
> it is ~10% faster on gdb itself. I pushed it as "t/work-stealing" on my
> github as well, in case you want to try it out.
>
I've tried it out (initially didn't build for me with gcc 7.5.0, but it
did after using gcc 12.1.1).
So, the same libxul experiment as before, gcc-12, O2, base commit
5ae3df226b1.
---
base commit:
real: 4.64
real: 4.10
real: 4.11
real: 4.65
real: 4.04
real: 4.21
real: 4.03
real: 4.48
real: 4.04
real: 4.65
t/work-stealing:
real: 3.65
real: 3.58
real: 3.58
real: 3.58
real: 3.58
real: 3.57
real: 3.58
real: 3.59
real: 3.59
real: 3.59
size heuristics:
real: 3.44
real: 3.44
real: 3.52
real: 3.43
real: 3.54
real: 3.47
real: 3.60
real: 3.46
real: 3.46
real: 3.52
Just one data point of course.
Thanks,
- Tom
next prev parent reply other threads:[~2022-07-23 6:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-18 19:42 Tom de Vries via Gdb-patches
2022-07-21 17:35 ` Pedro Alves
2022-07-21 20:23 ` Tom de Vries via Gdb-patches
2022-07-22 0:03 ` Pedro Alves
2022-07-22 11:07 ` Pedro Alves
2022-07-22 17:07 ` Tom de Vries via Gdb-patches
2022-07-22 19:08 ` Tom Tromey
2022-07-22 19:38 ` Simon Marchi via Gdb-patches
2022-07-23 3:17 ` Tom Tromey
2022-07-22 21:21 ` Tom Tromey
2022-07-23 6:51 ` Tom de Vries via Gdb-patches [this message]
2022-07-31 8:38 ` Tom de Vries via Gdb-patches
2022-07-23 5:55 ` Tom de Vries via Gdb-patches
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