Date: Fri, 29 Oct 2010 09:39:26 +0300 From: =?koi8-r?B?68/O2MvP1yDl18fFzsnK?= <kes-kes@yandex.ru> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-net@freebsd.org Subject: Re[2]: Polling slows down bandwidth Message-ID: <606859717.20101029093926@yandex.ru> In-Reply-To: <1452146D-A590-4676-A662-14D0EEE82152@mac.com> References: <1519248747.20101028232111@yandex.ru> <1452146D-A590-4676-A662-14D0EEE82152@mac.com>
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Здравствуйте, Chuck.
Вы писали 28 октября 2010 г., 23:41:58:
CS> On Oct 28, 2010, at 1:21 PM, Коньков Евгений wrote:
>> [ ... ]
CS> What is "sysctl kern.clockrate", and have you increased kern.hz
CS> in /boot/loader.conf to at least 1000, if not 2000 or 4000?
# vmstat -i
interrupt total rate
irq14: ata0 193948 6
irq16: rl0 42829515 1464
irq23: nfe0 41224044 1409
cpu0: timer 58494158 1999
irq256: igb0 106911 3
irq257: igb0 254606 8
irq258: igb0 2 0
Total 143103184 4892
# sysctl kern.clockrate
kern.clockrate: { hz = 1000, tick = 1000, profhz = 2000, stathz = 133 }
# sysctl kern.hz
kern.hz: 1000
but I have configured and installed kern with 2000HZ
"systat -v" shows that: 2002 cpu0: time
CS> Polling mode operation generally performs better when using older
CS> 100Mbs ethernet NICs which do not support interrupt mitigation and
CS> various capabilities like TSO4; gigabit ethernet NICs are smarter
CS> hardware and can generally outperform polling mode.
so using polling on gigabit NICs is a bottle neck? and is cause of low
performance, is not?
--
С уважением,
Коньков mailto:kes-kes@yandex.ru
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