From: Radu Rendec <radu.rendec@ines.ro>
To: Jarek Poplawski <jarkao2@gmail.com>
Cc: Jesper Dangaard Brouer <hawk@diku.dk>,
Denys Fedoryschenko <denys@visp.net.lb>,
netdev <netdev@vger.kernel.org>,
Calin Velea <calin.velea@gemenii.ro>
Subject: Re: htb parallelism on multi-core platforms
Date: Wed, 29 Apr 2009 19:21:11 +0300 [thread overview]
Message-ID: <1241022071.6554.375.camel@blade.ines.ro> (raw)
In-Reply-To: <20090429133810.GB2759@ami.dom.local>
I finally managed to disable NAPI on e1000e - apparently it can only be
done on the "official" Intel driver (downloaded from their website), by
compiling with "make CFLAGS_EXTRA=-DE1000E_NO_NAPI". This doesn't seem
to be available in the (2.6.29) kernel driver.
With NAPI disabled, 4 (of 8) cores go to 100% (instead of only one), but
overall throughput *decreases* from ~110K pps (with NAPI) to ~80K pps.
This makes sense, since h/w interrupt is much more time consuming than
polling (that's the whole idea behind NAPI anyway).
Radu Rendec
next prev parent reply other threads:[~2009-04-29 16:21 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-17 10:40 htb parallelism on multi-core platforms Radu Rendec
2009-04-17 11:31 ` David Miller
2009-04-17 11:33 ` Badalian Vyacheslav
2009-04-17 22:41 ` Jarek Poplawski
2009-04-18 0:21 ` Denys Fedoryschenko
2009-04-18 7:56 ` Jarek Poplawski
2009-04-22 14:02 ` Radu Rendec
2009-04-22 21:29 ` Jesper Dangaard Brouer
2009-04-23 8:20 ` Jarek Poplawski
2009-04-23 13:56 ` Radu Rendec
2009-04-23 18:19 ` Jarek Poplawski
2009-04-23 20:19 ` Jesper Dangaard Brouer
2009-04-24 9:42 ` Radu Rendec
2009-04-28 10:15 ` Jesper Dangaard Brouer
2009-04-29 10:21 ` Radu Rendec
2009-04-29 10:31 ` Jesper Dangaard Brouer
2009-04-29 11:03 ` Radu Rendec
2009-04-29 12:23 ` Jarek Poplawski
2009-04-29 13:15 ` Radu Rendec
2009-04-29 13:38 ` Jarek Poplawski
2009-04-29 16:21 ` Radu Rendec [this message]
2009-04-29 22:49 ` Calin Velea
2009-04-29 23:00 ` Re[2]: " Calin Velea
2009-04-30 11:19 ` Radu Rendec
2009-04-30 11:44 ` Jesper Dangaard Brouer
2009-04-30 14:04 ` Re[2]: " Calin Velea
2009-05-08 10:15 ` Paweł Staszewski
2009-05-08 17:55 ` Vladimir Ivashchenko
2009-05-08 18:07 ` Denys Fedoryschenko
2009-04-23 12:31 ` Radu Rendec
2009-04-23 18:43 ` Jarek Poplawski
2009-04-23 19:06 ` Jesper Dangaard Brouer
2009-04-23 19:14 ` Jarek Poplawski
2009-04-23 19:47 ` Jesper Dangaard Brouer
2009-04-23 20:00 ` Jarek Poplawski
2009-04-23 20:09 ` Jeff King
2009-04-24 6:01 ` Jarek Poplawski
[not found] ` <1039493214.20090424135024@gemenii.ro>
2009-04-24 11:19 ` Jarek Poplawski
2009-04-24 11:35 ` Re[2]: " Calin Velea
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