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Re: why reuseport don't increases throughoutput?

May 22, 2017 10:12PM
Hi!

Just as the article
https://www.nginx.com/blog/socket-sharding-nginx-release-1-9-1/ says,

it can also mean that when a worker is stalled by a blocking operation, the
block affects not only connections that the worker has already accepted,
but also connection requests that the kernel has assigned to the worker
since it became blocked.

Is there such a possibility that some blocking operations in your
production result in the dropping of QPS?


On 17 May 2017 at 19:58:37, fengx (nginx-forum@forum.nginx.org) wrote:

Hello

It shows the new feature reusport from v1.9.1 can increase the QPS by 2-3
times than accept_mutex on and off in this article
https://www.nginx.com/blog/socket-sharding-nginx-release-1-9-1/. But the
result is disappointed when we have the test in our production with
V1.11.2.2. It don't even have the improvement but reduced, by 10%, dropped
from 42K QPS(with accept_mutex off) to 38K QPS(with reuseport enabled). and
it indeed reduce the latency. The two test cases have anything identicial
except that the later have reuseport enabled. I wonder if I have missed
some special configuration.

Thanks.
Xiaofeng

Posted at Nginx Forum:
https://forum.nginx.org/read.php?2,274281,274281#msg-274281

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Subject Author Posted

why reuseport don't increases throughoutput?

fengx May 17, 2017 07:58AM

Re: why reuseport don't increases throughoutput?

CJ Ess May 22, 2017 01:36PM

Re: why reuseport don't increases throughoutput?

fengx May 22, 2017 10:40PM

Re: why reuseport don't increases throughoutput?

tokers May 22, 2017 10:10PM

Re: why reuseport don't increases throughoutput?

tokers May 22, 2017 10:12PM

Re: why reuseport don't increases throughoutput?

fengx May 22, 2017 10:59PM

Re: why reuseport don't increases throughoutput?

CJ Ess May 22, 2017 11:56PM

Re: why reuseport don't increases throughoutput?

fengx May 23, 2017 03:39AM

Re: why reuseport don't increases throughoutput?

CJ Ess May 23, 2017 12:20PM

Re: why reuseport don't increases throughoutput?

tokers May 22, 2017 11:56PM



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