While upgrading FreeBSD and hardware, we've run into issues with 10Gig ethernet drivers and expected processing power until changing the value of hw.intr_storm_threshold from the default of 1000 to 40000.
Both "systat -v 1" and "vmstat -i" confirm that even the processor timer seems to be generating 2000 interrupts/second, so is the inital value hampering the processing power of the new systems?
This machine is pretty idle running FBSD 7.2-RELEASE-p3
This machine is a coreI7 940 machine with some ftp load.
7.2-RELEASE-p2 of the OS.
Same Corei7 940 only "systat -v 1" output
Both "systat -v 1" and "vmstat -i" confirm that even the processor timer seems to be generating 2000 interrupts/second, so is the inital value hampering the processing power of the new systems?
This machine is pretty idle running FBSD 7.2-RELEASE-p3
Code:
> vmstat -i
interrupt total rate
irq1: atkbd0 8 0
irq6: fdc0 10 0
irq15: ata1 13713 8
irq52: amr0 3549 2
irq59: em1 434 0
cpu0: timer 3421359 1999
cpu3: timer 3421368 1999
cpu1: timer 3421368 1999
cpu2: timer 3421325 1999
Total 13703134 8008
This machine is a coreI7 940 machine with some ftp load.
7.2-RELEASE-p2 of the OS.
Code:
> vmstat -i
interrupt total rate
irq19: fwohci0+ 9923210 28
irq41: ixgb0 1319628798 3805
cpu0: timer 693204729 1999
irq257: re1 291212 0
cpu6: timer 693194426 1999
cpu1: timer 693194695 1999
cpu2: timer 693194565 1999
cpu5: timer 693194407 1999
cpu4: timer 693194409 1999
cpu7: timer 693194425 1999
cpu3: timer 693194567 1999
Total 6875409443 19827
Same Corei7 940 only "systat -v 1" output
Code:
2 users Load 3.17 2.82 2.66 Aug 18 15:53
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 32260 5916 247400 8108 1380704 count
All 255640 9944 4705480 83488 pages
Proc: Interrupts
r p d s w Csw Trp Sys Int Sof Flt 95346 cow 29328 total
2 152 121k 116k 334k 13k 417 110k 5903 zfod fwohci0+ 1
ozfod 13331 ixgb0 41
24.2%Sys 2.3%Intr 7.0%User 0.0%Nice 66.5%Idle %ozfod 1999 cpu0: time
| | | | | | | | | | | daefr 4 re1 irq257
============+>>>> 96292 prcfr 1999 cpu6: time
302 dtbuf 125430 totfr 1999 cpu1: time
Namei Name-cache Dir-cache 100000 desvn react 1999 cpu2: time
Calls hits % hits % 78996 numvn pdwak 1999 cpu5: time
47607 41650 87 24998 frevn pdpgs 1999 cpu4: time
15 intrn 1999 cpu7: time
Disks ad4 ad6 ad8 277316 wire 2000 cpu3: time
KB/t 0.00 0.00 0.00 26824 act
tps 0 0 0 1320476 inact
MB/s 0.00 0.00 0.00 cache
%busy 0 0 0 1379156 free