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>
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Hello. I am completely stuck. I have a router, that rules three subnets. At first there were Allied Telesyn's netcards with realtek chipsets. I am using ipfw+natd and I had like 3,5 megabytes per second with 20 per cent of interrupt load. I had "discarded oversized frame" too often so I've replaced two main cards with 3Com 905 and now my xl0 and xl1 never discard frames. But I saw no speed boost and interrupts were also very high. I have discovered some IRQ conflicts and removed them, now I have single device per IRQ, but still i have near 20-30 % of interrupt load, when i download something through this router (and natd takes rest % of CPU). Some people advised me to use polling, so I've built kernel with HZ=1000, polling and tried it. Interrupts grew to 40-50% and speed decreased to 200-300 kb/s, so I had to turn the polling off. I just don't know what to try, to gain at least 9 mb/s, because this is what I get at home with the same cards, the same processor, with no polling and throgh the same provider. Best regards, Bachilo Dmitry -- ------------------------ С уважением, Бачило Дмитрий Руководитель отдела системной интеграции ООО "Компания СоЛинк"help
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