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I have my laptop 4 years ago and i started to use archlinux at the same time.
Recently strange thing happens, i got super low SSD performance on archlinux.
ok, here is the story:
My hardware:
CPU: AMD dual core @1.9Ghz
RAM: 2GB
Graphic: ATI X1250 integrated
HDD: KingStone SSD 30GB, sda1 and sda2 for windows xp. sda3 for Archlinux @6GB with SATA interface.
1 i created a liveusb installation media on a usb stick and boot it to install archlinux . (kernerl 3.0 )
2 i use that liveusb to install archlinux through network on sda3 of my ssd, mounted only with / and swap. (kernel 3.4.4)
in env. 1, i did a hdparm -tT /dev/sda test, the ssd reads @133MB/s and stable, which i think it's normal.
in env. 2, i did the same test, when just login into system, results is about 125MB/s, 2 mins later, i got 80MB/s, 5 mins later, i got 17MB/s and can't be lower.
i think this has something to do with linux kernel or module, so i saved the lsmod and dmesg output of both the 2 env.s.
here is the file:
https://www.dropbox.com/sh/y26khrnjj3ukezx/sdd96I--Qi
i need help to find what's going on, thanks a lot!
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it seems it's time to buy a new laptop.
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Which I/O scheduler are you using. The default on Arch is CFQ, but for SSD's it is recommended to use either NOOP or Deadline schedulers.
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