Date: Tue, 26 Jan 2016 03:26:42 +0000 From: "sepherosa_gmail.com (Sepherosa Ziehau)" <phabric-noreply@FreeBSD.org> To: freebsd-net@freebsd.org Subject: [Differential] [Request, 136 lines] D5074: hyperv/hn: Improve sending performance Message-ID: <differential-rev-PHID-DREV-oqntlmzu2sup7ziqqx7l-req@FreeBSD.org>
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--b1_2f2d29c51593edd58ffa1ccd9e9d8153 Content-Type: text/plain; charset = "utf-8" Content-Transfer-Encoding: 8bit sepherosa_gmail.com created this revision. sepherosa_gmail.com added reviewers: network, adrian, delphij, royger, decui_microsoft.com, honzhan_microsoft.com, howard0su_gmail.com. sepherosa_gmail.com added a subscriber: freebsd-net-list. REVISION SUMMARY - Avoid main lock contention by trylock for if_start, if that fails, schedule TX taskqueue for if_start - Don't do direct sending if the packet to be sent is large, e.g. TSO packet. This change gives me stable 9.1Gbps TCP sending performance w/ TSO over a 10Gbe directly connected network (the performance fluctuated between 4Gbps and 9Gbps before this commit). It also improves non-TSO TCP sending performance a lot. REVISION DETAIL https://reviews.freebsd.org/D5074 AFFECTED FILES sys/dev/hyperv/netvsc/hv_net_vsc.h sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c EMAIL PREFERENCES https://reviews.freebsd.org/settings/panel/emailpreferences/ To: sepherosa_gmail.com, network, adrian, delphij, royger, decui_microsoft.com, honzhan_microsoft.com, howard0su_gmail.com Cc: freebsd-net-list --b1_2f2d29c51593edd58ffa1ccd9e9d8153 Content-Type: text/x-patch; charset=utf-8; name="D5074.12702.patch" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="D5074.12702.patch" ZGlmZiAtLWdpdCBhL3N5cy9kZXYvaHlwZXJ2L25ldHZzYy9odl9uZXR2c2NfZHJ2X2ZyZWVic2Qu YyBiL3N5cy9kZXYvaHlwZXJ2L25ldHZzYy9odl9uZXR2c2NfZHJ2X2ZyZWVic2QuYwotLS0gYS9z eXMvZGV2L2h5cGVydi9uZXR2c2MvaHZfbmV0dnNjX2Rydl9mcmVlYnNkLmMKKysrIGIvc3lzL2Rl di9oeXBlcnYvbmV0dnNjL2h2X25ldHZzY19kcnZfZnJlZWJzZC5jCkBAIC0xNDYsNiArMTQ2LDgg QEAKICNkZWZpbmUgSE5fVFhfREFUQV9TRUdDTlRfTUFYCQlcCiAgICAgKE5FVFZTQ19QQUNLRVRf 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