I recently installed a both a Dell dual cpu 2500 server (dual 1.6 ghz
ia32 chips) and a dell 7150 (dual IA64 chips). My users complained
that the disk io speed on the itanium seemed very slow, even though
both servers have a megaraid controller with seagate cheetah
disks. Bonnie also shows the ia64 machine having worse throughput than
the ia32 machine.
[root@hydra bonnie]# cat bonnie.hydra bonnie.leo
-------Sequential Output-------- ---Sequential Input--
--Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block---
--Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU
/sec %CPU
100 1765 100.0 282891 100.1 377295 100.0 2058 100.0 592709
99.5 51920.4 196.5
-------Sequential Output-------- ---Sequential Input--
--Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block---
--Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU
/sec %CPU
100 17049 100.1 265197 101.0 197094 98.2 16631 100.4 675831
99.0 40400.0 191.9
Hydra is the itanium, leo is the 32 bit machine. The character io of
hydra is a factor of 10 slower than that of leo. Is this more likely a
kernel issue, or a glibc issue? Both machiness run standard redhat
7.1, and 2.4.9-12smp kernels.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Dec 07 2001 - 21:00:33 EST