Interrupt performance
Slawa Olhovchenkov
slw at zxy.spb.ru
Fri Jan 28 18:45:02 UTC 2011
On Fri, Jan 28, 2011 at 06:03:15PM +0200, Stefan Lambrev wrote:
> Do the test with netblast ;)
> Most perf tools are written badly and for Linux.
> In our internal test netblast running on freebsd outperform everything else.
>
> P.S. - /usr/src/tools/tools/netrate/netblast - we have tested little more expensive card - em/igb and bce.
Now I install 8.2-RC2/i386 and use netblast:
# /usr/obj/usr/src/tools/tools/netrate/netblast/netblast 10.200.0.1 1122 1400 10
start: 1296239273.106911353
finish: 1296239283.107222845
send calls: 2703219
send errors: 2090049
approx send rate: 61317
approx error rate: 0
CPU load (No difference with netperf):
iostat:
tty ad0 cpu
tin tout KB/t tps MB/s us ni sy in id
1 48 0.00 0 0.00 4 0 47 20 29
0 44 0.00 0 0.00 2 0 68 30 0
0 44 0.00 0 0.00 12 0 65 23 0
0 44 0.00 0 0.00 6 0 73 21 0
0 44 0.00 0 0.00 8 0 54 38 0
0 44 0.00 0 0.00 5 0 66 29 0
0 44 0.00 0 0.00 7 0 65 29 0
0 44 0.00 0 0.00 7 0 64 29 0
0 44 0.00 0 0.00 8 0 64 28 0
0 44 0.00 0 0.00 7 0 57 35 0
0 235 0.00 0 0.00 4 0 13 12 71
vmstat:
procs memory page disk faults cpu
r b w avm fre flt re pi po fr sr ad0 in sy cs us sy id
1 0 0 97748K 431M 0 0 0 0 0 0 0 15331 269981 30697 6 94 0
1 0 0 97748K 431M 0 0 0 0 0 0 0 15333 269072 30716 5 95 0
1 0 0 97748K 431M 0 0 0 0 0 0 0 15332 269512 30690 9 91 0
1 0 0 97748K 431M 0 0 0 0 0 0 0 15331 269633 30698 8 92 0
1 0 0 97748K 431M 0 0 0 0 0 0 0 15334 269613 30693 7 93 0
1 0 0 97748K 431M 0 0 0 0 0 0 0 15332 269438 30713 13 87 0
1 0 0 97748K 431M 0 0 0 0 0 0 0 15337 269460 30705 7 93 0
1 0 0 97748K 431M 0 0 0 0 0 0 0 15299 266321 30617 6 94 0
1 0 0 97748K 431M 0 0 0 0 0 0 0 15300 266147 30625 11 89 0
(Linux, for compare, only 1279 cs)
systat -vmstat 1
3 users Load 0.29 0.09 0.07 Jan 28 21:31
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 16068 4496 99772 5208 440312 count
All 37664 6644 2227916 10384 pages
Proc: Interrupts
r p d s w Csw Trp Sys Int Sof Flt cow 17372 total
1 23 30k 12 270k 15k 30k zfod atkbd0 1
ozfod ata0 irq14
63.2%Sys 29.3%Intr 7.5%User 0.0%Nice 0.0%Idle %ozfod ata1 irq15
| | | | | | | | | | | daefr 15366 re0 irq19
================================++++++++++++++>>>> prcfr 2006 cpu0: time
1 dtbuf totfr
Namei Name-cache Dir-cache 34738 desvn react
Calls hits % hits % 595 numvn pdwak
34 frevn pdpgs
intrn
Disks ad0 26572 wire
KB/t 0.00 12800 act
tps 0 12732 inact
MB/s 0.00 104 cache
%busy 0 440208 free
11552 buf
> On Jan 28, 2011, at 4:33 PM, Slawa Olhovchenkov wrote:
>
> > I test network performance and found some strange result -- on the
> > same hardware Linux more then 10x used CPU resources for interrupt
> > processing.
> >
> > FreeBSD system utilise 70% CPU (32% idle, 59% interrupt, 9% sys) and
> > network card generate 14K-18K interrupt per second.
> >
> > Linux system utilise 20% CPU (80% idle, 13% system, 3% hiq, 4% siq)
> > and network card generate 56K interrupt per second.
> >
> > I used 'netperf -H host -t UDP_STREAM -l 60 -C -c -- -m 8972 -s
> > 128K -S 128K' for generate network traffic.
> >
> > NIC:
> >
> > re0: <RealTek 8169SC/8110SC Single-chip Gigabit Ethernet> port 0x4000-0x40ff mem 0xf0100000-0xf01000ff irq 19 at device 4.0 on pci11
> > re0: Chip rev. 0x18000000
> > re0: MAC rev. 0x00000000
> > miibus0: <MII bus> on re0
> > rgephy0: <RTL8169S/8110S/8211B media interface> PHY 1 on miibus0
> >
> >
> > CPU:
> >
> > CPU: Intel(R) Celeron(R) CPU 420 @ 1.60GHz (1596.05-MHz K8-class CPU)
> > Origin = "GenuineIntel" Id = 0x10661 Family = 6 Model = 16
> > Stepping = 1
> > Features=0xafebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,TM,PBE>
> > Features2=0xe31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM>
> > AMD Features=0x20100800<SYSCALL,NX,LM>
> > AMD Features2=0x1<LAHF>
> > TSC: P-state invariant
> >
> > RAM: one DDR2-667 DIMM.
> >
> > OS: 8.2-RC2, amd64
> >
> > _______________________________________________
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> > http://lists.freebsd.org/mailman/listinfo/freebsd-performance
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>
> --
> Best Wishes,
> Stefan Lambrev
> ICQ# 24134177
>
>
>
>
>
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