lkml.org 
[lkml]   [2015]   [Nov]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v4 0/2] clocksource/drivers/dw_apb_timer: improve performance a bit
Date
These two patches try to improve the dw_apb_timer clocksource/clockevent
performance.

These patches depend on the apbt_readl return value fix patch:

http://lists.infradead.org/pipermail/linux-arm-kernel/2015-November/388250.html

since v3:
- fix commit msg: we measured 4096 rounds of function call. So add this
information into commit msg to avoid confusion.

since v2:
- only use relaxed version in critical path
- inline apbt_readl/apbt_writel
- add some performance numbers

since v1:
- correct the wrong sentence in commit msg about writel performance on
CA9 with outer L2 cache. Thank Arnd for pointing out this in another
thread.


Jisheng Zhang (2):
clocksource/drivers/dw_apb_timer: Inline apbt_readl and apbt_writel
clocksource/drivers/dw_apb_timer: Use {readl|writel}_relaxed in
critical path

drivers/clocksource/dw_apb_timer.c | 30 +++++++++++++++++++++---------
1 file changed, 21 insertions(+), 9 deletions(-)

--
2.6.2



\
 
 \ /
  Last update: 2015-11-25 17:21    [W:0.142 / U:0.176 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site