Date: Tue, 15 Aug 2006 16:27:37 +0700 From: Bachilo Dmitry <root@solink.ru> To: current@freebsd.org Subject: throughput and interrupts Message-ID: <200608151627.37828.root@solink.ru>
next in thread | raw e-mail | index | archive | help
Hello. I am completely stuck. I have a router, that rules three subnets. At first= =20 there were Allied Telesyn's netcards with realtek chipsets. I am using=20 ipfw+natd and I had like 3,5 megabytes per second with 20 per cent of=20 interrupt load. I had "discarded oversized frame" too often so I've replace= d=20 two main cards with 3Com 905 and now my xl0 and xl1 never discard frames. B= ut=20 I saw no speed boost and interrupts were also very high. I have discovered= =20 some IRQ conflicts and removed them, now I have single device per IRQ, but= =20 still i have near 20-30 % of interrupt load, when i download something=20 through this router (and natd takes rest % of CPU). Some people advised me = to=20 use polling, so I've built kernel with HZ=3D1000, polling and tried it.=20 Interrupts grew to 40-50% and speed decreased to 200-300 kb/s, so I had to= =20 turn the polling off. I just don't know what to try, to gain at least 9 mb/s, because this is wha= t I=20 get at home with the same cards, the same processor, with no polling and=20 throgh the same provider. Best regards, Bachilo Dmitry =2D-=20 =2D----------------------- =F3 =D5=D7=C1=D6=C5=CE=C9=C5=CD, =E2=C1=DE=C9=CC=CF =E4=CD=C9=D4=D2=C9=CA =F2=D5=CB=CF=D7=CF=C4=C9=D4=C5=CC=D8 =CF=D4=C4=C5=CC=C1 =D3=C9=D3=D4=C5=CD= =CE=CF=CA =C9=CE=D4=C5=C7=D2=C1=C3=C9=C9 =EF=EF=EF "=EB=CF=CD=D0=C1=CE=C9=D1 =F3=CF=EC=C9=CE=CB"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200608151627.37828.root>