netdev - Re: [PATCH] pktgen node allocation

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 linux-cve-announce PHC
Open Source and information security mailing list archives

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

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

Message-ID: <19367.45417.306750.626323@gargle.gargle.HOWL>
Date:	Mon, 22 Mar 2010 19:05:29 +0100
From:	Robert Olsson <robert@...julf.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Robert Olsson <robert@...julf.net>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	olofh@....se
Subject: Re: [PATCH] pktgen node allocation


Eric Dumazet writes:

 > > Result "manually" tuned. 
 > > 
 > > eth0 9617.7 M bit/s      822 k pps 
 > > eth1 9619.1 M bit/s      823 k pps 
 > > eth2 9619.1 M bit/s      823 k pps 
 > > eth3 9619.2 M bit/s      823 k pps 
 > > eth4 5995.2 M bit/s      512 k pps  <-  PCIe-x8
 > > eth5 5995.3 M bit/s      512 k pps  <-  PCIe-x8
 > > eth6 9619.2 M bit/s      823 k pps 
 > > eth7 9619.2 M bit/s      823 k pps 
 > > eth8 9619.1 M bit/s      823 k pps 
 > > eth9 9619.0 M bit/s      823 k pps 
 > > 
 > > > 90 Gbit/s

 DMA potential this box is about four 10g ports.

 > > Result "manually" mistuned by switching node 0 and 1. 
 > > 
 > > eth0 9613.6 M bit/s      822 k pps 
 > > eth1 9614.9 M bit/s      822 k pps 
 > > eth2 9615.0 M bit/s      822 k pps 
 > > eth3 9615.1 M bit/s      822 k pps 
 > > eth4 2918.5 M bit/s      249 k pps  <-  PCIe-x8
 > > eth5 2918.4 M bit/s      249 k pps  <-  PCIe-x8
 > > eth6 8597.0 M bit/s      735 k pps 
 > > eth7 8597.0 M bit/s      735 k pps 
 > > eth8 8568.3 M bit/s      733 k pps 
 > > eth9 8568.3 M bit/s      733 k pps 
 > > 
 > I wonder why eth0-eth3 results are unchanged after a node flip.

 Yes it's strange. 

 With clone_skb=1 we could see differences with just one GIGE interface 
 using 64 byte pkts so it might be very different on 10g.  We're getting 
 unfortunely closer to hardware...

 Cheers
					--ro

 
--
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