Messages in this thread | | | Date | Tue, 17 Jun 2003 07:14:00 -0400 | Subject | Re: i/o benchmarks on 2.5.70* kernels | From | rwhron@earthlin ... |
| |
> 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
- 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/
| |