* [PATCH 2/2] make the number of spins tuneable
@ 2015-08-29 8:51 Jens Gustedt
2015-08-29 17:17 ` Rich Felker
0 siblings, 1 reply; 2+ messages in thread
From: Jens Gustedt @ 2015-08-29 8:51 UTC (permalink / raw)
To: musl
---
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
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH 2/2] make the number of spins tuneable
2015-08-29 8:51 [PATCH 2/2] make the number of spins tuneable Jens Gustedt
@ 2015-08-29 17:17 ` Rich Felker
0 siblings, 0 replies; 2+ messages in thread
From: Rich Felker @ 2015-08-29 17:17 UTC (permalink / raw)
To: musl
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
^ permalink raw reply [flat|nested] 2+ messages in thread
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2015-08-29 8:51 [PATCH 2/2] make the number of spins tuneable Jens Gustedt
2015-08-29 17:17 ` Rich Felker
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