Fw: 2.6.19-rc1: Volanomark slowdown
From: Stephen Hemminger <hidden>
Date: 2006-11-07 19:26:26
Begin forwarded message: Date: Tue, 07 Nov 2006 10:32:34 -0800 From: Tim Chen <redacted> Newsgroups: linux.dev.kernel Subject: 2.6.19-rc1: Volanomark slowdown The patch [TCP]: Send ACKs each 2nd received segment commit: 1ef9696c909060ccdae3ade245ca88692b49285b http://kernel.org/git/? p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1ef9696c909060ccdae3ade245ca88692b49285b reduced Volanomark benchmark throughput by 10%. This is because Volanomark sends short message (<100 bytes) on its TCP connections. This patch increases the number of ACKs traffic by 3.5 times. By adopting this patch, we assume that with small segment, having short delay is important enough that we are willing to reduce bandwidth with more ACKs. Is there any real application out there that this new behavior could be a concern? Tim - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ -- Stephen Hemminger [off-list ref]