From: Jiri Slaby <jirislaby@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Laight <David.Laight@aculab.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
Christoph Hellwig <hch@infradead.org>,
"Jason A. Donenfeld" <Jason@zx2c4.com>
Subject: Re: [PATCH next v4 0/5] minmax: Relax type checks in min() and max().
Date: Tue, 9 Jan 2024 07:54:17 +0100 [thread overview]
Message-ID: <8ef72461-1ed6-46cb-a692-412abec86186@kernel.org> (raw)
In-Reply-To: <CAHk-=whkGHOmpM_1kNgzX1UDAs10+UuALcpeEWN29EE0m-my=w@mail.gmail.com>
On 08. 01. 24, 22:11, Linus Torvalds wrote:
> On Mon, 8 Jan 2024 at 12:04, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
>>
>> So we *could* plan on that, remove the checks from min/max, and use
>> something like the attached patch.
>
> Whee.
>
> On my machine, that patch makes an "allmodconfig" build go from
>
> 10:41 elapsed
>
> to
>
> 8:46 elapsed
>
> so that min/max type checking is almost 20% of the build time.
>
> Yeah, I think we need to get rid of it.
>
> Can somebody else confirm similar time differences? Or is it just me?
openSUSE config [1] -j160 build on 160 cores on /dev/shm:
real 6m5,729s
user 551m54,756s
sys 94m36,401s
Patched:
real 6m2,908s
user 535m35,860s
sys 92m0,006s
allmodconfig:
real 7m14,514s
user 818m34,541s
sys 112m59,033s
Patched:
real 6m57,144s
user 797m25,163s
sys 110m5,316s
So yes, there is definitely a change.
[1]
https://github.com/openSUSE/kernel-source/blob/master/config/x86_64/default
regards,
--
js
suse labs
next prev parent reply other threads:[~2024-01-09 6:54 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-18 8:14 [PATCH next v4 0/5] minmax: Relax type checks in min() and max() David Laight
2023-09-18 8:16 ` [PATCH next v4 1/5] minmax: Add umin(a, b) and umax(a, b) David Laight
2024-01-12 12:49 ` Dan Carpenter
2024-01-12 13:40 ` David Laight
2024-01-12 14:03 ` Dan Carpenter
2024-01-12 14:26 ` David Laight
2024-01-18 10:30 ` Dan Carpenter
2023-09-18 8:17 ` [PATCH next v4 2/5] minmax: Allow min()/max()/clamp() if the arguments have the same signedness David Laight
2023-09-18 8:17 ` [PATCH next v4 3/5] minmax: Fix indentation of __cmp_once() and __clamp_once() David Laight
2023-09-18 8:18 ` [PATCH next v4 4/5] minmax: Allow comparisons of 'int' against 'unsigned char/short' David Laight
2023-09-18 8:19 ` [PATCH next v4 5/5] minmax: Relax check to allow comparison between unsigned arguments and signed constants David Laight
2023-09-27 17:30 ` [PATCH next v4 0/5] minmax: Relax type checks in min() and max() Andrew Morton
2023-09-28 8:10 ` David Laight
2024-01-08 11:46 ` Jiri Slaby
2024-01-08 13:34 ` David Laight
2024-01-08 18:19 ` Linus Torvalds
2024-01-08 20:04 ` Linus Torvalds
2024-01-08 21:11 ` Linus Torvalds
2024-01-09 0:39 ` [PATCH next v4 0/5] minmax: Relax type checks in min() and max().^[[C John Stoffel
2024-01-09 6:54 ` Jiri Slaby [this message]
2024-01-10 6:17 ` [PATCH next v4 0/5] minmax: Relax type checks in min() and max() Stephen Rothwell
2024-01-10 9:03 ` David Laight
2024-01-10 19:35 ` Linus Torvalds
2024-01-10 22:58 ` David Laight
2024-01-20 21:33 ` Linus Torvalds
2024-01-21 22:18 ` David Laight
2024-01-09 9:35 ` David Laight
2024-01-09 9:41 ` David Laight
2024-01-09 12:09 ` Kalle Valo
2024-01-19 7:14 ` Jiri Slaby
2024-01-19 8:23 ` Hans Verkuil
2024-01-19 9:14 ` David Laight
2024-01-12 9:13 ` Dan Carpenter
2024-01-12 12:16 ` David Laight
2024-01-12 12:40 ` Dan Carpenter
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