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3fddd09e59
This patch optimizes the timer load and start sequence. By combining the
load and start a needless posted wait can be removed from the system timer
execution path.
* Before patch register writes are taking up .078% @ 500MHz during idle.
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 for long captures.
Signed-off-by: Richard Woodruff <r-woodruff2@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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|---|---|---|
| .. | ||
| board-2430sdp.c | ||
| board-apollon.c | ||
| board-generic.c | ||
| board-h4.c | ||
| clock24xx.c | ||
| clock24xx.h | ||
| clock34xx.c | ||
| clock34xx.h | ||
| clock.c | ||
| clock.h | ||
| cm-regbits-24xx.h | ||
| cm-regbits-34xx.h | ||
| cm.h | ||
| control.c | ||
| devices.c | ||
| gpmc.c | ||
| id.c | ||
| io.c | ||
| irq.c | ||
| Kconfig | ||
| mailbox.c | ||
| Makefile | ||
| Makefile.boot | ||
| memory.c | ||
| memory.h | ||
| mux.c | ||
| pm.c | ||
| prcm-common.h | ||
| prcm.c | ||
| prm-regbits-24xx.h | ||
| prm-regbits-34xx.h | ||
| prm.h | ||
| sdrc.h | ||
| serial.c | ||
| sleep.S | ||
| sram-fn.S | ||
| timer-gp.c | ||
| usb-tusb6010.c | ||