[dpdk-dev,RFC,v2,1/2] lib/librte_eal: Reduce timer initialization time
Commit Message
Changing from 1/2 second to 1/10 doesn't compromise the precision, and a 4/10 second is worth saving.
Signed-off-by: Zhihong Wang <zhihong.wang@intel.com>
---
lib/librte_eal/linuxapp/eal/eal_timer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Comments
On Thu, 19 Nov 2015 20:53:47 -0500
Zhihong Wang <zhihong.wang@intel.com> wrote:
> + struct timespec sleeptime = {.tv_nsec = 1E8 }; /* 1/10 second */
Why not NSEC_PER_SEC / 10
> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Saturday, November 21, 2015 12:32 AM
> To: Wang, Zhihong <zhihong.wang@intel.com>
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH RFC v2 1/2] lib/librte_eal: Reduce timer
> initialization time
>
> On Thu, 19 Nov 2015 20:53:47 -0500
> Zhihong Wang <zhihong.wang@intel.com> wrote:
>
> > + struct timespec sleeptime = {.tv_nsec = 1E8 }; /* 1/10 second */
>
> Why not NSEC_PER_SEC / 10
Yes, it looks better using macro :)
@@ -271,7 +271,7 @@ get_tsc_freq(void)
#ifdef CLOCK_MONOTONIC_RAW
#define NS_PER_SEC 1E9
- struct timespec sleeptime = {.tv_nsec = 5E8 }; /* 1/2 second */
+ struct timespec sleeptime = {.tv_nsec = 1E8 }; /* 1/10 second */
struct timespec t_start, t_end;
uint64_t tsc_hz;