Re: [PATCH] mlx4_en: map entire pages to increase throughput

On Mon, Jul 16, 2012 at 12:42:41PM -0700, Rick Jones wrote:

On 07/16/2012 12:06 PM, Thadeu Lima de Souza Cascardo wrote:

quoted

On Mon, Jul 16, 2012 at 10:27:57AM -0700, Rick Jones wrote:

quoted

What is the effect on packet-per-second performance?  (eg aggregate,
burst-mode netperf TCP_RR with TCP_NODELAY set or perhaps UDP_RR)

I used uperf with TCP_NODELAY and 16 threads sending from another
machine 64000-sized writes for 60 seconds.

I get 5898op/s (3.02Gb/s) without the patch against 18022ops/s
(9.23Gb/s) with the patch.

I was thinking more along the lines of an additional comparison,
explicitly using netperf TCP_RR or something like it, not just the
packets per second from a bulk transfer test.

rick
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I used a uperf profile that is similar to TCP_RR. It writes, then reads
some bytes. I kept the TCP_NODELAY flag.

Without the patch, I saw the following:

packet size	ops/s		Gb/s
1		337024		0.0027
90		276620		0.199
900		190455		1.37
4000		68863		2.20
9000		45638		3.29
60000		9409		4.52

With the patch:

packet size	ops/s		Gb/s
1		451738		0.0036
90		345682		0.248
900		272258		1.96
4000		127055		4.07
9000		106614		7.68
60000		30671		14.72