Date: Mon, 05 May 2014 21:18:39 +0200 From: Armin Pirkovitsch <sperber@FreeBSD.org> To: stable@freebsd.org Subject: high load in KVM when network is used (stable/10) Message-ID: <5367E40F.1060308@FreeBSD.org>
next in thread | raw e-mail | index | archive | help
Hi, has anyone ever experienced a problem with FreeBSD 10 (release as well as stable) in KVMs? (in relation to network activity) Currently the load of my server goes up when I just fetch a file. systat -vmstat > 3 users Load 0.57 0.28 0.28 May 5 21:04 > > Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER > Tot Share Tot Share Free in out in out > Act 714476 27764 2951164 33696 14130k count > All 2002012 83188 3211064 209272 pages > Proc: Interrupts > r p d s w Csw Trp Sys Int Sof Flt ioflt 4575 total > 2 102 11k 17 25k 4046 38 cow atkbd0 1 > zfod uhci0 11 > 28.6%Sys 14.3%Intr 1.4%User 0.0%Nice 55.7%Idle ozfod ata1 15 > | | | | | | | | | | %ozfod 121 cpu0:timer > ==============+++++++> daefr 3255 virtio_pci > dtbuf prcfr virtio_pci > Namei Name-cache Dir-cache 350329 desvn totfr 790 virtio_pci > Calls hits % hits % 6556 numvn react 116 cpu3:timer > 6 6 100 4181 frevn pdwak 185 cpu2:timer > 210 pdpgs 108 cpu1:timer > Disks vtbd0 cd0 pass0 intrn > KB/t 120 0.00 0.00 1382576 wire > tps 788 0 0 504540 act > MB/s 92.55 0.00 0.00 291232 inact > %busy 49 0 0 cache > 14130808 free > buf it's even worse when I access apache on that server: > 3 users Load 4.63 1.33 0.66 May 5 21:06 > > Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER > Tot Share Tot Share Free in out in out > Act 727760 27764 2938852 33696 14116k count > All 2015420 83188 3198752 209272 pages > Proc: Interrupts > r p d s w Csw Trp Sys Int Sof Flt ioflt 8 total > 103 14 4 49 2 1 cow atkbd0 1 > zfod uhci0 11 > 68.8%Sys 31.2%Intr 0.0%User 0.0%Nice 0.0%Idle ozfod ata1 15 > | | | | | | | | | | %ozfod 1 cpu0:timer > ==================================++++++++++++++++ daefr 4 virtio_pci > dtbuf prcfr virtio_pci > Namei Name-cache Dir-cache 350329 desvn totfr 1 virtio_pci > Calls hits % hits % 6557 numvn react cpu3:timer > 6 6 100 4136 frevn pdwak 1 cpu2:timer > 136 pdpgs 1 cpu1:timer > Disks vtbd0 cd0 pass0 intrn > KB/t 128 0.00 0.00 1382808 wire > tps 1 0 0 506072 act > MB/s 0.11 0.00 0.00 303460 inact > %busy 33 0 0 cache > 14116816 free > buf and you couldn't say that it just hasn't got enough power... ... > CPU: Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz (2000.01-MHz K8-class CPU) > Origin = "GenuineIntel" Id = 0x206d7 Family = 0x6 Model = 0x2d Stepping = 7 > Features=0xf83fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,SS> > Features2=0x9eb82203<SSE3,PCLMULQDQ,SSSE3,CX16,SSE4.1,SSE4.2,x2APIC,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,HV> > AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM> > AMD Features2=0x1<LAHF> > real memory = 17179869184 (16384 MB) > avail memory = 16597995520 (15829 MB) > Event timer "LAPIC" quality 400 > ACPI APIC Table: <BOCHS BXPCAPIC> > FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs > FreeBSD/SMP: 4 package(s) x 1 core(s) ... Has someone any suggestions what I could do to improve the performance (and lower the load)? Cheers Armin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5367E40F.1060308>