> tiobench on SMP results are not very good, lots of
> fragmentation, the random IO throughput drops is
> probably due to AS strangling TCQ though. You are
> using SMP and TCQ, right?
SMP yes. The non-benchmarked disks (which don't matter
say this at boot time:
scsi0:A:1:0: Tagged Queuing enabled. Depth 4
(aic7xxx)
These config options on the non-benchmarked disks:
CONFIG_AIC7XXX_CMDS_PER_DEVICE=4
CONFIG_AIC7XXX_RESET_DELAY_MS=15000
CONFIG_AIC7XXX_DEBUG_ENABLE=y
CONFIG_AIC7XXX_DEBUG_MASK=0
CONFIG_AIC7XXX_REG_PRETTY_PRINT=y
----The benchmarked disks are on scsi3 and scsi4. The benchmarked disks do not tell what TCQ they have.
CONFIG_SCSI_QLOGIC_ISP=y CONFIG_SCSI_QLOGIC_FC=y CONFIG_SCSI_QLOGIC_FC_FIRMWARE=y
TCQ on the benchmarked disks may be 1024... +#define MAXISPREQUEST(isp) ((IS_FC(isp) || IS_ULTRA2(isp))? 1024 : 256)
but that's just a guess.
-- Randy Hron http://home.earthlink.net/~rwhron/kernel/bigbox.html
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This archive was generated by hypermail 2b29 : Mon Jun 23 2003 - 22:00:20 EST