Re: [PATCH net-next] udp: prefetch rmem_alloc in udp_queue_rcv_skb()

2017-06-21 Thread Paolo Abeni
On Wed, 2017-06-21 at 11:41 -0400, David Miller wrote: > From: Paolo Abeni > Date: Wed, 21 Jun 2017 10:24:40 +0200 > > > On UDP packets processing, if the BH is the bottle-neck, it > > always sees a cache miss while updating rmem_alloc; try to > > avoid it prefetching the value as soon as we have

Re: [PATCH net-next] udp: prefetch rmem_alloc in udp_queue_rcv_skb()

2017-06-21 Thread David Miller
From: Paolo Abeni Date: Wed, 21 Jun 2017 10:24:40 +0200 > On UDP packets processing, if the BH is the bottle-neck, it > always sees a cache miss while updating rmem_alloc; try to > avoid it prefetching the value as soon as we have the socket > available. > > Performances under flood with multipl