Date: Mon, 4 Jun 2001 11:56:52 -0700 (PDT) From: Nivedita Singhvi <nivedita@sequent.com> To: freebsd-net@freebsd.org Subject: throughput drop at 8192 sends (fwd) Message-ID: <200106041856.LAA21311@eng4.sequent.com>
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(Was asked to fwd to this list from freebsd-bugs) Sorry for the duplicate mail. I was running some tests and observed rather strange behaviour. TCP Request/Response tests showed a drastic fall at response sizes of 8192 bytes. This strange drop was also mirrored in UDP RR tests. Wondering if this is a known issue? (Smells like a VM problem). I'm afraid I cant upgrade and didnt have time to track down more info, but should be easily reproducible. Kernel: FreeBSD 4.2 Machines: 500MHz PIII / 333MHz PII (512MB each) Network: 100Mb Ethernet Test: netperf tcp_rr Request/Response Transaction Rate ---------------- ----------------- 1,1 5433 1,64 5061 1,4096 1067 1,8192 10 1,32767 287 1,65536 96 64,64 4753 64,4096 1042 64,8192 10 64,32768 290 64,65536 92 128,4096 1040 128,8192 10 128,32768 287 128,65536 93 thanks, Nivedita To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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