From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: The killing of ideal_nops[]
Date: Tue, 9 Mar 2021 22:24:44 +0100 [thread overview]
Message-ID: <YEfnnFUbizbJUQig@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20210309120519.7c6bbb97@gandalf.local.home>
On Tue, Mar 09, 2021 at 12:05:19PM -0500, Steven Rostedt wrote:
> On Tue, 9 Mar 2021 17:58:17 +0100
> Peter Zijlstra <peterz@infradead.org> wrote:
>
> > Hi,
> >
> > AFAICT everything made in the past 10 years ends up using p6_nops. Is it
> > time to kill off ideal_nops[] and simplify life?
> >
>
> Well, the one bug that was reported recently was due to a box that uses a
> different "ideal_nops" than p6_nops. Perhaps we should ask him if there's
> any noticeable difference between using p6_nops for every function than the
> ideal_nops that as found for that box.
If the machine is more than a decade old, I'm not really caring about
optimal performance. If it is 32bit, I really couldn't be arsed as long
as it boots.
next prev parent reply other threads:[~2021-03-09 21:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-09 16:58 The killing of ideal_nops[] Peter Zijlstra
2021-03-09 17:05 ` Steven Rostedt
2021-03-09 21:24 ` Peter Zijlstra [this message]
2021-03-10 0:33 ` hpa
2021-03-10 9:14 ` Peter Zijlstra
2021-03-10 9:35 ` Peter Zijlstra
2021-03-10 10:03 ` Peter Zijlstra
2021-03-10 10:22 ` Peter Zijlstra
2021-03-10 14:13 ` Steven Rostedt
2021-03-10 14:24 ` Peter Zijlstra
2021-03-10 14:30 ` Peter Zijlstra
2021-03-10 15:48 ` Alexei Starovoitov
2021-03-10 16:04 ` Peter Zijlstra
2021-03-11 9:28 ` David Laight
2021-03-14 22:43 ` Maciej W. Rozycki
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