RE: [PATCH] timer optimization part 2.

Woodruff, Richard
2008-05-07T23:46:56Z

So what about this?

> -----Original Message-----
> From: Woodruff, Richard
> Sent: Friday, April 04, 2008 3:04 PM
> To: Tony Lindgren
> Cc: Kevin Hilman; linux-omap@vger.kernel.org
> Subject: [PATCH] timer optimization part 2.
>
> Hi,
>
> This patch adds a new function timer_load_start() which optimizes the
> system timer. In tree users have been updated to use this function.
>
> This was tested and working on a pull as of 4 April 08 on 2.6.25-rc8-
> omap1-04408-g722c80b on 3430SDP. A previous version has been working
> with out issue for a while now.
>
> * Before patch register writes are taking up .078% @ 500MHz.
>
> Address |total |min |max |avr
|count|ratio%
> old\process\default_idle|7.369s |0.0us|999.902ms|14.477ms|509.
|62.661%
> ld\Global\cpu_v7_do_idle|4.265s |0.0us|375.786ms|24.374ms|175.
|36.270%
> (UNKNOWN)|17.503ms|0.us|531.080us|5.119us|3419.
|0.148%
> r\omap_dm_timer_set_load|8.135ms|0.0us|79.887us|15.065us|540.
|0.069%
> <--
> \vmlinux-old\Global\_end|2.023ms|0.0us|4.000us|0.560us|3613.
|0.017%
> -old\Global\__raw_readsw|1.962ms|0.0us|108.610us|9.167us|214.
|0.016%
> old\smc91x\smc_interrupt|1.353ms|0.0us|10.212us|2.348us|576.
|0.011%
> s/namei\__link_path_walk|1.161ms|0.0us|4.310us|0.762us| 1524.
|0.009%
> \omap_dm_timer_write_reg|1.085ms|0.0us|126.150us|2.153us|504.
|0.009%
> <--
>
> * After patch timer functions do not show up in top listings.
>
> Regards,
> Richard W.