Re: [PATCH] timer optimization part 2.

Tony Lindgren
2008-05-08T17:40:41Z

* Woodruff, Richard <r-woodruff2@ti.com> [080507 16:47]:
> So what about this?

Yeah, looks good, I'll push it today.

Tony

> > -----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.
>