Allright, I just finished re-testing, here are the results:
53c7,8xx: 10MHz FAST SCSI-2, disconnect enabled
-------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
53C7xx 210 3628 67.6 3404 19.6 1549 17.4 3362 53.9 3819 18.1 33.7 1.9
53C8xx: 10MHz, disconnect enabled, TQ4 (see note below)
-------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
53C8xx 210 3529 69.7 3328 20.8 1481 17.7 3150 51.6 3559 16.4 36.9 2.2
I tried to re-test the 53C8xx driver with tagged queuing set to 0, but
unfortunately, Bonnie crashed during the test. I was able to switch VC,
but couldn't kill the Bonnie task, which was consuming 99.9% CPU and
totally hung.
I browsed my kernel-log and found the following:
kernel: scsi : aborting command due to timeout : pid 1876, scsi0, channel 0, id 0, lun 0 0x0a 06 62 df 46 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 1979, scsi0, channel 0, id 0, lun 0 0x0a 06 af 07 f4 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 1980, scsi0, channel 0, id 0, lun 0 0x0a 06 af fb f4 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 1876, scsi0, channel 0, id 0, lun 0 0x0a 06 62 df 46 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 1979, scsi0, channel 0, id 0, lun 0 0x0a 06 af 07 f4 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 1980, scsi0, channel 0, id 0, lun 0 0x0a 06 af fb f4 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi0 channel 0 : resetting for second half of retries.
kernel: SCSI bus is being reset for host 0 channel 0.
kernel: ncr53c810-0: restart (scsi bus reset).
kernel: ncr53c810-0-<target 0, lun 0>: FAST SCSI-2 100ns (10 Mb/sec) offset 8.
kernel: scsi : aborting command due to timeout : pid 3393, scsi0, channel 0, id 0, lun 0 0x08 09 d3 63 02 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 1876, scsi0, channel 0, id 0, lun 0 0x0a 06 62 df 46 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 1876, scsi0, channel 0, id 0, lun 0 0x0a 06 62 df 46 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 4203, scsi0, channel 0, id 0, lun 0 0x08 09 68 cb 02 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 4203, scsi0, channel 0, id 0, lun 0 0x08 09 68 cb 02 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi0 channel 0 : resetting for second half of retries.
kernel: SCSI bus is being reset for host 0 channel 0.
kernel: ncr53c810-0: restart (scsi bus reset).
kernel: ncr53c810-0-<target 0, lun 0>: FAST SCSI-2 100ns (10 Mb/sec) offset 8.
kernel: scsi : aborting command due to timeout : pid 4260, scsi0, channel 0, id 0, lun 0 0x08 04 b8 f9 02 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 4407, scsi0, channel 0, id 0, lun 0 0x08 09 d3 63 02 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 4444, scsi0, channel 0, id 0, lun 0 0x08 09 d7 d5 02 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 4515, scsi0, channel 0, id 0, lun 0 0x08 05 13 45 02 00
kernel: ncr53c8xx_abort : abort call
kernel: scsi : aborting command due to timeout : pid 4518, scsi0, channel 0, id 0, lun 0 0x0a 04 f2 35 02 00
kernel: ncr53c8xx_abort : abort call
[continued with some more lines like the above]
# /AS/ powered by #
# http://www.ping.at/members/alexa/ Linux 2.0 #
-----------------------------------------------------------------------