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Date: Tue, 11 Sep 2007 16:54:59 -0400 From: David Acker <dacker@...net.com> To: Jeff Garzik <jgarzik@...ox.com> CC: "Kok, Auke" <auke-jan.h.kok@...el.com>, John Ronciak <john.ronciak@...el.com>, Jesse Brandeburg <jesse.brandeburg@...el.com>, Jeff Kirsher <jeffrey.t.kirsher@...el.com>, Milton Miller <miltonm@....com>, netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net, Scott Feldman <sfeldma@...ox.com> Subject: Re: [PATCH] Fix e100 on systems that have cache incoherent DMA Jeff Garzik wrote: > David Acker wrote: >> Let me know if there is any other information I can provide you. I >> will look through the code to see what could be going on with your >> machine. I will also look into reproducing these results with a newer >> kernel. This may be tricky since compulab's patches are pretty stale >> and don't always apply easily. > > > pktgen outputs for the various cases modified/unmodified[/others?] would > be nice, if you have a spot of time. > > Jeff I am not familiar with pktgen but I seem to have it working for a simple test. I edited the 1-1 example from ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/ . The results with and without the patch are below. Let me know if you want any other tests run. I obtained a PCI to miniPCI adapter that will let me test my miniPCI based e100s on my main dev box. I will work on reproducing Intel's results tomorrow as time permits. I am also still trying to get time to work on a recent kernel merge. Not a lot changed in the 100 since 2.6.18.4 except a flip from readX/writeX to ioreadX/iowriteX. -Ack cm-debian:/tmp# ./pktgen.conf-1-1 Removing all devices Adding eth0 Setting max_before_softirq 10000 Configuring /proc/net/pktgen/eth0 Running... ctrl^C to stop Done Here are the results on 2.6.18.4 with the patch I submitted on my embedded system. cm-debian:/tmp# cat /proc/net/pktgen/eth0 Params: count 10000000 min_pkt_size: 60 max_pkt_size: 60 frags: 0 delay: 0 clone_skb: 1000000 ifname: eth0 flows: 0 flowlen: 0 dst_min: 192.168.1.40 dst_max: src_min: src_max: src_mac: 00:09:30:FF:F2:F6 dst_mac: 00:19:B9:0B:45:8E udp_src_min: 9 udp_src_max: 9 udp_dst_min: 9 udp_dst_max: 9 src_mac_count: 0 dst_mac_count: 0 Flags: Current: pkts-sofar: 10000000 errors: 0 started: 14852031282115us stopped: 14852181463422us idle: 918us seq_num: 10000011 cur_dst_mac_offset: 0 cur_src_mac_offset: 0 cur_saddr: 0x2901a8c0 cur_daddr: 0x2801a8c0 cur_udp_dst: 9 cur_udp_src: 9 flows: 0 Result: OK: 150181307(c150180389+d918) usec, 10000000 (60byte,0frags) 66586pps 31Mb/sec (31961280bps) errors: 0 and here are the results without the patch: cm-debian:/tmp# cat /proc/net/pktgen/eth0 Params: count 10000000 min_pkt_size: 60 max_pkt_size: 60 frags: 0 delay: 0 clone_skb: 1000000 ifname: eth0 flows: 0 flowlen: 0 dst_min: 192.168.1.40 dst_max: src_min: src_max: src_mac: 00:09:30:FF:F2:F6 dst_mac: 00:19:B9:0B:45:8E udp_src_min: 9 udp_src_max: 9 udp_dst_min: 9 udp_dst_max: 9 src_mac_count: 0 dst_mac_count: 0 Flags: Current: pkts-sofar: 10000000 errors: 0 started: 14864204332576us stopped: 14864355451225us idle: 1431us seq_num: 10000011 cur_dst_mac_offset: 0 cur_src_mac_offset: 0 cur_saddr: 0x2901a8c0 cur_daddr: 0x2801a8c0 cur_udp_dst: 9 cur_udp_src: 9 flows: 0 Result: OK: 151118649(c151117218+d1431) usec, 10000000 (60byte,0frags) 66173pps 31Mb/sec (31763040bps) errors: 0 - 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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