From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Subject: Re: [PATCH 2/2] make the number of spins tuneable
Date: Sat, 29 Aug 2015 13:17:30 -0400 [thread overview]
Message-ID: <20150829171730.GE7833@brightrain.aerifal.cx> (raw)
In-Reply-To: <1440838216.693.5.camel@dysnomia.u-strasbg.fr>
On Sat, Aug 29, 2015 at 10:51:15AM +0200, Jens Gustedt wrote:
> ---
> src/thread/__wait.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/src/thread/__wait.c b/src/thread/__wait.c
> index a93d41d..46501cb 100644
> --- a/src/thread/__wait.c
> +++ b/src/thread/__wait.c
> @@ -1,8 +1,14 @@
> #include "pthread_impl.h"
>
> +#ifndef __WAIT_SPINS
> +# define __WAIT_SPINS 100
> +#endif
> +
> +int __wait_spins = __WAIT_SPINS;
> +
> void __wait(volatile int *addr, volatile int *waiters, int val, int priv)
> {
> - int spins=100;
> + int spins=__wait_spins;
> if (priv) priv = FUTEX_PRIVATE;
> while (spins--) {
> if (*addr==val) a_spin();
> --
> 2.1.4
I don't understand the intended usage. This is not suitable as a
public API.
Rich
prev parent reply other threads:[~2015-08-29 17:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-29 8:51 Jens Gustedt
2015-08-29 17:17 ` Rich Felker [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150829171730.GE7833@brightrain.aerifal.cx \
--to=dalias@libc.org \
--cc=musl@lists.openwall.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/musl/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).