From: Stephen Hemminger <shemminger@linux-foundation.org>
To: Philip Romanov <philip_romanov@yahoo.com>
Cc: netdev@vger.kernel.org
Subject: Re: SKY2 vs SK98LIN performance on 88E8053 MAC
Date: Fri, 8 Jun 2007 16:30:39 -0700 [thread overview]
Message-ID: <20070608163039.1783c04e@localhost.localdomain> (raw)
In-Reply-To: <884143.12109.qm@web52311.mail.re2.yahoo.com>
On Fri, 8 Jun 2007 13:41:55 -0700 (PDT)
Philip Romanov <philip_romanov@yahoo.com> wrote:
> Hello!
>
> We are observing severe IPv4 forwarding degradation
> when switching from sk98lin to sky2 driver. Setup:
> plain 2.6.21.3 kernel, 88E8053 Marvell Yukon2 MAC,
> sk98lin is @revision 8.41.2.3 coming from FC6, SKY2
> driver from 2.6.21.3 kernel, both drivers are in NAPI
> mode.
>
> Benchmarks are done using bidirectional traffic
> generated by IXIA, sending 256-byte packets. Observed
> packet throughput is almost 30% higher with sklin98
> driver.
>
> Ethernet flow control is turned off in SKY2 driver
> (hard-coded as off, we know about this problem).
>
> I also have oprofile records of the drivers in case
> anybody is interested.
>
> Please share info if you know anything on SKY2
> performance bottlenecks.
>
I'm surprised? The vendor driver has bogus extra locking and other
crap. Please send profile data. Flow control should work on sky2 (now).
Are you routing or doing real TCP transfers?
--
Stephen Hemminger <shemminger@linux-foundation.org>
next prev parent reply other threads:[~2007-06-08 23:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-08 20:41 SKY2 vs SK98LIN performance on 88E8053 MAC Philip Romanov
2007-06-08 23:30 ` Stephen Hemminger [this message]
2007-06-09 1:20 ` Philip Romanov
2007-06-10 16:26 ` Stephen Hemminger
2007-06-11 19:05 ` Philip Romanov
2007-06-11 22:23 ` Stephen Hemminger
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