Re: [PATCH net-next 3/8] tcp: use one bit in TCP_SKB_CB to mark ACK timestamps

2016-03-30 Thread Willem de Bruijn
On Wed, Mar 30, 2016 at 6:37 PM, Soheil Hassas Yeganeh wrote: > From: Soheil Hassas Yeganeh > > Currently, to avoid a cache line miss for accessing skb_shinfo, > tcp_ack_tstamp skips socket that do not have > SOF_TIMESTAMPING_TX_ACK bit set in sk_tsflags. This is > implemented based on an implici

[PATCH net-next 3/8] tcp: use one bit in TCP_SKB_CB to mark ACK timestamps

2016-03-30 Thread Soheil Hassas Yeganeh
From: Soheil Hassas Yeganeh Currently, to avoid a cache line miss for accessing skb_shinfo, tcp_ack_tstamp skips socket that do not have SOF_TIMESTAMPING_TX_ACK bit set in sk_tsflags. This is implemented based on an implicit assumption that the SOF_TIMESTAMPING_TX_ACK is set via socket options fo