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From: Rick Jones <rick.jones2@hp.com>
To: Linux Network Development list <netdev@vger.kernel.org>
Subject: NIC interrupt assignments under UltraSPARC-T1
Date: Wed, 13 Sep 2006 17:47:27 -0700	[thread overview]
Message-ID: <4508A69F.8060102@hp.com> (raw)

 From time to time I "play" with netperf on different systems.  I happen 
to have occasion to play with a T2000.  Under Solaris 10 I am able to 
coerce the interrupts of the different core GbEs to be on different 
cores rather than strands of the same core.

Under a 2.6.15 kernel (Ubuntu Dapper) it would appear that the old 
standby of "echo affinity mask to the IRQ" doesn't "work" - no matter 
how I change the mask for a NIC, running a netperf TCP_RR test seems to 
show the interrupts happening on the same strand.

Is it indeed not possible to alter the interrupt assignments or have I 
(as I'm wont to do) missed something quasi-obvious?

thanks,

rick jones

             reply	other threads:[~2006-09-14  0:47 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-09-14  0:47 Rick Jones [this message]
2006-09-14  1:14 ` NIC interrupt assignments under UltraSPARC-T1 David Miller
  -- strict thread matches above, loose matches on Subject: below --
2006-09-14 20:17 Rick Jones
2006-09-19 20:04 ` David Miller

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