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Date: Wed, 10 Sep 2014 18:26:00 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: John Fastabend <john.fastabend@...il.com> Cc: xiyou.wangcong@...il.com, davem@...emloft.net, jhs@...atatu.com, netdev@...r.kernel.org, paulmck@...ux.vnet.ibm.com, brouer@...hat.com Subject: Re: [net-next PATCH v4 10/16] net: sched: make cls_u32 lockless On Wed, 2014-09-10 at 08:50 -0700, John Fastabend wrote: > Make cls_u32 classifier safe to run without holding lock. This patch > converts statistics that are kept in read section u32_classify into > per cpu counters. > > This patch was tested with a tight u32 filter add/delete loop while > generating traffic with pktgen. By running pktgen on vlan devices > created on top of a physical device we can hit the qdisc layer > correctly. For ingress qdisc's a loopback cable was used. > > for i in {1..100}; do > q=`echo $i%8|bc`; > echo -n "u32 tos: iteration $i on queue $q"; > tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ > action skbedit queue_mapping $q; > sleep 1; > tc filter del dev p3p2 prio $i; > > echo -n "u32 tos hash table: iteration $i on queue $q"; > tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 > tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ > match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 > tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ > ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q > sleep 2; > tc filter del dev p3p2 prio $i > sleep 1; > done > > Signed-off-by: John Fastabend <john.r.fastabend@...el.com> > --- Acked-by: Eric Dumazet <edumazet@...gle.com> -- 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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