Calling all kernel hackers,
The block device interface is still choking for some reason, I see
an 80% performance hit on disk read throughput going from 2.2 to 2.4.
Bonnie disk throughput tests, 2 gig file size:
Kernel 2.2.16
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
1*2000 9274 99.3 24344 22.8 15534 33.9 8935 93.1 45774 38.8 379.0 4.4
Kernel 2.4.0.ac22
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
1*2000 9389 98.2 24499 21.5 6293 8.5 5781 60.9 9490 8.5 328.4 6.8
Hardware:
Intel 840 chipset dual processor motherboard,
3Ware ATA RAID controller with 8 disks
godspeed,
Dan Summer
Workgroup Video
McLean, VA
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This archive was generated by hypermail 2b29 : Fri Jun 23 2000 - 21:00:22 EST