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Message-ID: <20070608163039.1783c04e@localhost.localdomain> Date: Fri, 8 Jun 2007 16:30:39 -0700 From: Stephen Hemminger <shemminger@...ux-foundation.org> To: Philip Romanov <philip_romanov@...oo.com> Cc: netdev@...r.kernel.org Subject: Re: SKY2 vs SK98LIN performance on 88E8053 MAC On Fri, 8 Jun 2007 13:41:55 -0700 (PDT) Philip Romanov <philip_romanov@...oo.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@...ux-foundation.org> - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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