Re: Desktop performance problem

[Aniruddha <mailingdotlist@gmail.com>]

On Tue, Jun 14, 2011 at 6:57 PM, Aniruddha <mailingdotlist@gmail.com> wrote:
> On Tue, Jun 14, 2011 at 6:25 PM, Juan Sierra Pons <juan@elsotanillo.net> wrote:
>> Can you make some test with hdparm in both disks (to see disk performance)?
>>
>> I think the problem can be located in the I/O disk part as it happens
>> when copying data (or rsnapshot is running) from two differents disks
>
> Which test do you recommend with hdparm? hdparm -Tt ?
>

Here are the results, but this doesn't help much. Disk transfers are
fast, the only problem is that they slow down the whole system.

Funtoo
# hdparm -Tt  /dev/sdb

/dev/sdb:
 Timing cached reads:   23816 MB in  2.00 seconds = 11930.04 MB/sec
 Timing buffered disk reads: 396 MB in  3.01 seconds = 131.57 MB/sec

# hdparm -Tt  /dev/sdc

/dev/sdc:
 Timing cached reads:   23328 MB in  2.00 seconds = 11685.35 MB/sec
 Timing buffered disk reads: 384 MB in  3.01 seconds = 127.48 MB/sec

Debian
# hdparm -Tt  /dev/sdb

/dev/sdb:
 Timing cached reads:   28546 MB in  2.00 seconds = 14292.52 MB/sec
 Timing buffered disk reads: 392 MB in  3.00 seconds = 130.63 MB/sec

# hdparm -Tt  /dev/sdc

/dev/sdc:
 Timing cached reads:   27858 MB in  2.00 seconds = 13946.92 MB/sec
 Timing buffered disk reads: 388 MB in  3.01 seconds = 129.03 MB/sec