netdev - Re: [net-next PATCH V1 1/3] net: bulk alloc and reuse of SKBs in NAPI context

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Message-ID: <1462888134.23934.60.camel@edumazet-glaptop3.roam.corp.google.com>
Date:	Tue, 10 May 2016 06:48:54 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Jesper Dangaard Brouer <brouer@...hat.com>
Cc:	Alexander Duyck <alexander.duyck@...il.com>,
	Netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Saeed Mahameed <saeedm@...lanox.com>,
	Or Gerlitz <gerlitz.or@...il.com>,
	Eugenia Emantayev <eugenia@...lanox.com>
Subject: Re: [net-next PATCH V1 1/3] net: bulk alloc and reuse of SKBs in
 NAPI context

On Tue, 2016-05-10 at 14:30 +0200, Jesper Dangaard Brouer wrote:

> Disable busy poll on both client and server, Not patched:
> 
>  $ netperf -H 198.18.40.2 -t TCP_RR  -l 60 -T 6,6 -Cc
>  MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 198.18.40.2 
>  ()  port 0 AF_INET : histogram : demo : first burst 0 : cpu bind
>  Local /Remote
>  Socket Size   Request Resp.  Elapsed Trans.   CPU    CPU    S.dem   S.dem
>  Send   Recv   Size    Size   Time    Rate     local  remote local   remote
>  bytes  bytes  bytes   bytes  secs.   per sec  % S    % S    us/Tr   us/Tr
>  
>  16384  87380  1       1      60.00   78077.55  3.74   2.69   3.830   8.265  
>  16384  87380 

Tell us more about the -T6,6

For example how many TX/RX queues you have on the NIC, and which cpus
service interrupts.