Date: Fri, 28 Jan 2011 17:33:55 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: freebsd-performance@freebsd.org Subject: Interrupt performance Message-ID: <20110128143355.GD18170@zxy.spb.ru>
next in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20110128143355.GD18170>