Re: [PATCH net-next] net: introduce a new tracepoint for tcp_rcv_space_adjust

2018-04-17 Thread Yafang Shao
On Wed, Apr 18, 2018 at 7:44 AM, Alexei Starovoitov wrote: > On Mon, Apr 16, 2018 at 08:43:31AM -0700, Eric Dumazet wrote: >> >> >> On 04/16/2018 08:33 AM, Yafang Shao wrote: >> > tcp_rcv_space_adjust is called every time data is copied to user space, >> >

Re: [PATCH net-next] net: introduce a new tracepoint for tcp_rcv_space_adjust

2018-04-17 Thread Alexei Starovoitov
On Mon, Apr 16, 2018 at 08:43:31AM -0700, Eric Dumazet wrote: > > > On 04/16/2018 08:33 AM, Yafang Shao wrote: > > tcp_rcv_space_adjust is called every time data is copied to user space, > > introducing a tcp tracepoint for which could show us when the packet is > > copied to user. > > This

Re: [PATCH net-next] net: introduce a new tracepoint for tcp_rcv_space_adjust

2018-04-16 Thread Yafang Shao
On Mon, Apr 16, 2018 at 11:43 PM, Eric Dumazet wrote: > > > On 04/16/2018 08:33 AM, Yafang Shao wrote: >> tcp_rcv_space_adjust is called every time data is copied to user space, >> introducing a tcp tracepoint for which could show us when the packet is >> copied to user.

Re: [PATCH net-next] net: introduce a new tracepoint for tcp_rcv_space_adjust

2018-04-16 Thread Eric Dumazet
On 04/16/2018 08:33 AM, Yafang Shao wrote: > tcp_rcv_space_adjust is called every time data is copied to user space, > introducing a tcp tracepoint for which could show us when the packet is > copied to user. > This could help us figure out whether there's latency in user process. > > When a

[PATCH net-next] net: introduce a new tracepoint for tcp_rcv_space_adjust

2018-04-16 Thread Yafang Shao
tcp_rcv_space_adjust is called every time data is copied to user space, introducing a tcp tracepoint for which could show us when the packet is copied to user. This could help us figure out whether there's latency in user process. When a tcp packet arrives, tcp_rcv_established() will be called

Re: [PATCH net-next] net: introduce a new tracepoint for tcp_rcv_space_adjust

2018-04-14 Thread David Miller
The net-next tree is closed, please resubmit this when the merge window ends and the net-next tree opens back up. Thank you.

[PATCH net-next] net: introduce a new tracepoint for tcp_rcv_space_adjust

2018-04-14 Thread Yafang Shao
tcp_rcv_space_adjust is called every time data is copied to user space, introducing a tcp tracepoint for which could show us when the packet is copied to user. This could help us figure out whether there's latency in user process. When a tcp packet arrives, tcp_rcv_established() will be called