Date: Thu, 14 Dec 2006 16:26:18 +0000 From: Dieter <freebsd@sopwith.solgatos.com> To: freebsd-questions@freebsd.org Subject: Re: processes not getting fair share of available disk I/O Message-ID: <200612150026.AAA06605@sopwith.solgatos.com> In-Reply-To: Your message of "Thu, 14 Dec 2006 17:52:23 EST." <20061214225223.GA99321@xor.obsecurity.org>
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> > FreeBSD 6.0
>
> Erk. How about retrying with something modern ;-) We do fix lots of
> bugs over time you know!
In my defense, 6.0 is only one revision down. (until 6.2 comes out real soon now)
>> 32.3%Sys 31.5%Intr 0.0%User 0.0%Nice 36.2%Idl 710892 inact 32 3: sio1
>> 74.8%Sys 25.2%Intr 0.0%User 0.0%Nice 0.0%Idl 828676 inact 36 3: sio1
> Interrupt CPU usage might be high, but the first thing you should do
> is retry with 6.2-rc1 and work from there.
Whoops, the systat -vmstat and vmstat -i were with mutex profiling enabled.
Sorry about that. CPU usage is much lower with it off. 85-95% idle when writing.
writing:
5 users Load 0.33 0.33 0.22 Dec 14 16:06
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 868784 3600 893464 7828 62208 count
All 2003956 3904 1623566k 8284 pages
zfod Interrupts
Proc:r p d s w Csw Trp Sys Int Sof Flt cow 2179 total
5 43 4265 1 856 4861 2 677056 wire 1002 0: clk
449856 act 1: atkb
2.3%Sys 2.3%Intr 0.0%User 0.0%Nice 95.3%Idl 822692 inact 31 3: sio1
| | | | | | | | | | 59244 cache 4: sio0
=+ 2964 free 7: ppc0
daefr stray 7
Namei Name-cache Dir-cache prcfr 128 8: rtc
Calls hits % hits % 2 react 44 10: ohc
pdwak 922 11: fwo
pdpgs 14: ata
Disks ad2 ad4 ad6 ad8 ad10 da0 cd0 intrn 52 15: ata
KB/t 119 0.00 128 128 128 128 0.00 218640 buf
tps 27 0 22 26 3 3 0 25 dirtybuf
MB/s 3.13 0.00 2.74 3.24 0.37 0.37 0.00 100000 desiredvnodes
% busy 47 0 41 48 5 3 0 985 numvnodes
582 freevnodes
reading:
5 users Load 0.47 0.35 0.23 Dec 14 16:07
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 868776 3592 893464 7828 109448 count
All 2004988 3896 1623995k 8284 pages
zfod Interrupts
Proc:r p d s w Csw Trp Sys Int Sof Flt cow 6984 total
3 45 24496 5 221416918 78 677084 wire 1003 0: clk
449984 act 1: atkb
45.3%Sys 10.9%Intr 0.0%User 0.0%Nice 43.8%Idl 776328 inact 32 3: sio1
| | | | | | | | | | 106484 cache 4: sio0
=======================+++++ 2964 free 7: ppc0
daefr stray 7
Namei Name-cache Dir-cache prcfr 128 8: rtc
Calls hits % hits % 322 react 825 10: ohc
3 pdwak 4365 11: fwo
39334 pdpgs 14: ata
Disks ad2 ad4 ad6 ad8 ad10 da0 cd0 intrn 631 15: ata
KB/t 125 0.00 128 115 128 128 0.00 218592 buf
tps 321 0 412 521 9 9 0 15 dirtybuf
MB/s 39.30 0.00 51.45 58.62 1.12 1.12 0.00 100000 desiredvnodes
% busy 100 0 100 82 15 10 0 985 numvnodes
582 freevnodes
interrupt total rate
irq0: clk 15227816 1000
irq1: atkbd0 2 0
irq3: sio1 361128 23
irq4: sio0 702 0
irq7: ppc0 83 0
stray irq7 1 0
irq8: rtc 1948792 127
irq10: ohci0 ohci1+ 287380 18
irq11: fwohci0 bge* 8675757 569
irq14: ata0 57 0
irq15: ata1 238863 15
Total 26740581 1756
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