Re: Route cache performance under stress
From: Robert Olsson <hidden>
Date: 2003-06-13 17:15:48
David S. Miller writes: > From: Robert Olsson [off-list ref] > Date: Wed, 11 Jun 2003 19:40:47 +0200 > > vma samples %-age symbol name > c023c038 107340 33.143 fn_hash_lookup > > Ok, let's optimize our datastructures for how we actually > use them :-) Also, fn_zone shrunk by 8 bytes. Some percent less on our XEON/UP here. Input rate 2*190 kpps clone_skb=1. dst hash code in. Without Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flags eth0 1500 0 2988282 9680382 9680382 7011722 11 0 0 0 BRU eth1 1500 0 15 0 0 0 2988291 0 0 0 BRU eth2 1500 0 2988336 9681671 9681671 7011667 3 0 0 0 BRU eth3 1500 0 2 0 0 0 2988337 0 0 0 BRU 00002100 000005e8 005b2c4a 00000000 00000001 00000000 00000000 00000000 00000000 00000002 00000000 005b1c49 005b1c3c 00000007 00000000 00bd877c 00000002 With patch Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flags eth0 1500 0 2877562 9698244 9698244 7122444 11 0 0 0 BRU eth1 1500 0 13 0 0 0 2819350 0 0 0 BRU eth2 1500 0 2877512 9693477 9693477 7122492 4 0 0 0 BRU eth3 1500 0 1 0 0 0 2877511 0 0 0 BRU 00001ec7 0000058e 0057cb3c 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0057bb37 0057bb2c 00000008 00000000 00b0c4a6 00000000 Time for a beer now... Still a lot of progress this week. In practice we never see "dst cache overflow" again. Cheers. --ro