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.
Attachment:
timer-optimize.diff
Description: timer-optimize.diff
