Re: 2 x quad-core system is slower that 2 x dual core on FreeBSD

Hi.

Ivan Voras wrote:
CPU states: 9.5% user, 0.0% nice, 82.0% system, 0.5% interrupt, 8.0%
idle
A wild idea that might not help: try reducing kern.hz in loader.conf to
something like 100 and see if something significant changes.
Now it runs with hz=100, number of context switches became ~ 2 times
less, but still there's 90% system CPU load (see attach).

With best regards,
Alexey Popov











1 users Load 16.36 12.24 6.14 Nov 19 18:08

Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 366988 16952 834288 37248 3515624 count 1
All 423228 18472 5089568 41144 pages 4
Proc: Interrupts
r p d s w Csw Trp Sys Int Sof Flt 1 cow 3917 total
31 24 98k 35k 95k 2315 100 29k 29919 zfod sio0 irq4
ozfod ata0 irq14
48.6%Sys 1.0%Intr 49.5%User 0.0%Nice 1.0%Idle %ozfod 5 mfi0 irq18
| | | | | | | | | | | daefr uhci0 uhci
========================+>>>>>>>>>>>>>>>>>>>>>>>>> 1709 prcfr 200 cpu0: time
4 dtbuf 23140 totfr 2311 em0 irq256
Namei Name-cache Dir-cache 100000 desvn react 200 cpu2: time
Calls hits % hits % 1494 numvn pdwak 200 cpu3: time
147517 147514 100 158 frevn pdpgs 200 cpu1: time
intrn 200 cpu4: time
Disks mfid0 106840 wire 200 cpu7: time
KB/t 20.20 355720 act 201 cpu5: time
tps 5 21248 inact 200 cpu6: time
MB/s 0.10 1228 cache
%busy 1 3514792 free
65056 buf





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