netdev - Re: SKY2 vs SK98LIN performance on 88E8053 MAC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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