[dpdk-dev] [PATCH RFC v2 1/2] lib/librte_eal: Reduce timer initialization time

2015-11-19 Thread Zhihong Wang 
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 
---
 lib/librte_eal/linuxapp/eal/eal_timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_timer.c 
b/lib/librte_eal/linuxapp/eal/eal_timer.c
index e0642de..4de0353 100644
--- a/lib/librte_eal/linuxapp/eal/eal_timer.c
+++ b/lib/librte_eal/linuxapp/eal/eal_timer.c
@@ -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;
-- 
2.5.0

[dpdk-dev] [PATCH RFC v2 1/2] lib/librte_eal: Reduce timer initialization time

2015-11-20 Thread Stephen Hemminger 
On Thu, 19 Nov 2015 20:53:47 -0500
Zhihong Wang  wrote:

> + struct timespec sleeptime = {.tv_nsec = 1E8 }; /* 1/10 second */

Why not NSEC_PER_SEC / 10

[dpdk-dev] [PATCH RFC v2 1/2] lib/librte_eal: Reduce timer initialization time

2015-11-23 Thread Wang, Zhihong 


> -Original Message-
> From: Stephen Hemminger [mailto:stephen at networkplumber.org]
> Sent: Saturday, November 21, 2015 12:32 AM
> To: Wang, Zhihong 
> Cc: dev at 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  wrote:
> 
> > +   struct timespec sleeptime = {.tv_nsec = 1E8 }; /* 1/10 second */
> 
> Why not NSEC_PER_SEC / 10

Yes, it looks better using macro :)