--- Results after 56 passes --- Best: 100.000000 -- Worst: 99.987793 -- Average: 99.999564 Only 2 were 99.987793, the 54 others were all 100.000000. I got this by making the changes below on my dual proc Dell 1750. setpci -v -s 01:08.1 LATENCY_TIMER=8 setpci -v -s 00:0f.1 LATENCY_TIMER=8 setpci -v -s 01:04.0 LATENCY_TIMER=8 setpci -v -s 01:02.0 LATENCY_TIMER=8 setpci -v -s 00:0f.2 LATENCY_TIMER=8 setpci -v -s 01:04.0 LATENCY_TIMER=8 (these are USB, SCSI HW RAID driver, Ethernet, Video, etc. I did not alter ZAP cards, nor any bridges or buses) echo 1 > /proc/irq/17/smp_affinity (Ethernet) echo 1 > /proc/irq/18/smp_affinity (SCSI HW RAID Driver) echo 2 > /proc/irq/20/smp_affinity (TDM) echo 2 > /proc/irq/24/smp_affinity (TE411P) I also turned of the startup of irqbalance. The setpci changes did the most work concerning reaching 100% in zttest. Irqbalance was causing the the processor handling the interrupts of the zap cards to change very often. This would impose a delay during the change and cause the zttest numbers to drop/be inconsistent. Because I turned irqbalance off, the irqs are processed round robin style, which is also not good. Therefore, I hard coded the processor affinity for the zap cards to one proc and all other high load irqs to the other proc. If you have more than 2 procs, you can spread them out even more. If you do not turn off irqbalance, the affinity changes will be overwritten by it. I made these changes on a live system without issue. I set these changes in /etc/rc.d/rc.local to reset them after reboots. -- -- Steven May you have the peace and freedom that come from abandoning all hope of having a better past. --- - --- - - - - - - - -- - - - --- - ------ - - --- - - -- - - - -- - - -