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Message-Id: <20180829.220815.1265477887800729259.davem@davemloft.net> Date: Wed, 29 Aug 2018 22:08:15 -0700 (PDT) From: David Miller <davem@...emloft.net> To: lirongqing@...du.com Cc: netdev@...r.kernel.org Subject: Re: [PATCH][net-next] vxlan: reduce dirty cache line in vxlan_find_mac From: Li RongQing <lirongqing@...du.com> Date: Wed, 29 Aug 2018 11:52:10 +0800 > vxlan_find_mac() unconditionally set f->used for every packet, > this causes a cache miss for every packet, since remote, hlist > and used of vxlan_fdb share the same cache line, which are > accessed when send every packets. > > so f->used is set only if not equal to jiffies, to reduce dirty > cache line times, this gives 3% speed-up with small packets. > > Signed-off-by: Zhang Yu <zhangyu31@...du.com> > Signed-off-by: Li RongQing <lirongqing@...du.com> Applied.
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