GFS2 performance issues

[npavlidis]

Hello all,

I have setup a gf2 cluster following a howto

I have followed this a performance howto
and the red-hat performace troubleshooting guide

debugfs is mounted on www1 at the moment but I cant make much of it

# dd if=/dev/urandom of=/webs/test.dat bs=104857600 count=1
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 34.4229 seconds, 3.0 MB/s

# ./ping_pong /webs/test.dat 4
707 locks/sec

# ./ping_pong -rw /webs/test.dat 4
data increment = 1
713 locks/sec

these values keep going up and down (ping_pong ones not the dd one)
(up and down ranged from 1400 to 30 and 300)

NOTE: I am using CentOS 5.6 using a later kernel (2.6.32.43-6.art.x86_64)

Any help would be greatly appreciated

Thank you in advance,

Nik

[Lakshmipathi]

Have you stared three ping_ping instances and the lock count didn't decrease?
If you kill ping_pong one by one - the lock count should increase.