Re: [PATCH 0/5] arm: shmobile: Lager Add USB and SATA support

[カオ ミン ヒェップ <cm-hiep@jinso.co.jp>]

Hi Sakato-san

On 09/10/2014 04:15 PM, Ryusuke Sakato wrote:
> Hi Hiep-san,
>
>
> I believe that I should unite the conditions of the performance test of "CONFIG_CPU_FREQ is not set" on Upstream-v3.16-rc5,
>   and "CONFIG_CPU_FREQ=y" on uptream-v3.17-rc2.
>
>
>> # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
>> ondemand
> In order that you may not be subject to the influence of cpufreq, you should change
>   "CONFIG_CPU_FREQ is not set", or should perform the following setup.
>
> 　echo -n performance > /sys/device/system/cpu/cpu0/cpufreq/scaling_governor
> 　echo -n performance > /sys/device/system/cpu/cpu1/cpufreq/scaling_governor
> 　echo -n performance > /sys/device/system/cpu/cpu2/cpufreq/scaling_governor
> 　echo -n performance > /sys/device/system/cpu/cpu3/cpufreq/scaling_governor
>
As you pointed out, I changed "CONFIG_CPU_FREQ=y" to "CONFIG_CPU_FREQ is 
not set" on uptream-v3.17-rc2 ,
I saw that the writing speed on v3.17-rc2 and is same writing speed on 
v3.16-rc5.

# mount -t tmpfs -o size@0m tmpfs /tmp
root@linaro-nano:~# dd if=/dev/urandom of=/tmp/file-350mb bs=1M count50
350+0 records in
350+0 records out
367001600 bytes (367 MB) copied, 90.2065 s, 4.1 MB/s
root@linaro-nano:~# mount /dev/sda1 /mnt/
kjournald starting.  Commit interval 5 seconds
EXT3-fs (sda1): using internal journal
EXT3-fs (sda1): recovery complete
EXT3-fs (sda1): mounted filesystem with ordered data mode
root@linaro-nano:~# time cp /tmp/file-350mb /mnt/file; time umount /mnt/

real    0m5.386s
user    0m0.010s
sys     0m5.200s

real    0m1.078s
user    0m0.020s
sys     0m0.510s

Thanks you for your help!



Cao Minh Hiep.