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Date: Fri, 01 May 2015 19:44:13 -0400 (EDT) From: David Miller <davem@...emloft.net> To: eric.dumazet@...il.com Cc: netdev@...r.kernel.org Subject: Re: [PATCH net-next] ipv4: speedup ip_idents_reserve() From: Eric Dumazet <eric.dumazet@...il.com> Date: Fri, 01 May 2015 10:37:49 -0700 > From: Eric Dumazet <edumazet@...gle.com> > > Under stress, ip_idents_reserve() is accessing a contended > cache line twice, with non optimal MESI transactions. > > If we place timestamps in separate location, we reduce this > pressure by ~50% and allow atomic_add_return() to issue > a Request for Ownership. > > Signed-off-by: Eric Dumazet <edumazet@...gle.com> Looks good, applied, thanks Eric. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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