Re: RPC performance

[Ricardo Wurmus <rekado@elephly.net>]

Ludovic Courtès <ludovic.courtes@inria.fr> writes:

> ludovic.courtes@inria.fr (Ludovic Courtès) skribis:
>
>> There are several ways we can improve it, and over time we should try to
>> implement all of them:
>>
>>   1. Buffer writes to the server socket (currently it’s terrible if you
>>      look at the ‘write’ calls in ‘strace’).
>
> Could you test the effect of the patch below?  It reduces the number of
> ‘write’ calls from 9.5K to 2.0K on “guix build python2-numpy”.

I have tried it but my setup is way too variable to allow me to compare
performance changes.  For “guix build bwa” when “bwa” has already been
built I get waiting times between 6 and 42 seconds.  Any improvement
would disappear in this terribly wide range.

I will soon have access to a new NFS share on a separate server and with
disabled read timestamps, which I hope will be more reliable.

-- 
Ricardo

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