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Date: Sat, 29 Aug 2015 13:17:30 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: [PATCH 2/2] make the number of spins tuneable
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
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