From: Eric Lemoine <Eric.Lemoine@Sun.COM>
To: Eric Lemoine <Eric.Lemoine@Sun.COM>
Cc: Robert Olsson <Robert.Olsson@data.slu.se>,
"David S. Miller" <davem@redhat.com>,
netdev@oss.sgi.com
Subject: Re: simple change to qdisc_restart()
Date: Tue, 20 May 2003 13:24:02 +0200 [thread overview]
Message-ID: <20030520112402.GF978@udine> (raw)
In-Reply-To: <20030520112109.GE978@udine>
> Let me explain a bit more.
>
> I developped a kernel module that basically implements per-cpu kernel
> threads, each being bound to a particular cpu. I also modified the
> Myrinet NIC driver and firmware so that they implement per-cpu rx rings.
>
> The NIC makes sure that packets of the same connection are always
> deposited in the same ring. Here's how it does it. For each incoming
> pkt, the NIC computes the index of the ring into which the packet must
> be placed [*], passes this index to the driver, and dmas the packet into
> the appropriate ring. The driver uses the ring index to wake up the
> appropriate kernel thread. Each kernel-thread behaves in a NAPI manner.
Oops. I forgot to mention that:
[*] Currently the NIC simply does ring_idx = IPsrc & (nr_rings-1).
--
Eric
next prev parent reply other threads:[~2003-05-20 11:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-20 8:22 simple change to qdisc_restart() Eric Lemoine
2003-05-20 8:28 ` David S. Miller
2003-05-20 8:57 ` Eric Lemoine
2003-05-20 10:36 ` Robert Olsson
2003-05-20 11:21 ` Eric Lemoine
2003-05-20 11:24 ` Eric Lemoine [this message]
2003-05-20 12:24 ` Robert Olsson
2003-05-20 12:33 ` Jamal Hadi
2003-05-26 9:15 ` Eric Lemoine
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