Re: Very poor NFS I/O

[tlaronde%kergis.com@localhost]

On Sat, Feb 28, 2026 at 12:34:53PM +0100, BERTRAND Joël wrote:
> tlaronde%kergis.com@localhost a écrit :
> > On Sat, Feb 28, 2026 at 11:48:01AM +0100, BERTRAND Joël wrote:
> >> tlaronde%kergis.com@localhost a écrit :
> >>> The system is unicore?
> >>
> >> 	Nope.
> >>
> >> 	i7-4770, four cores, eight threads.
> > 
> > But I'm puzzled by the number you gave:
> > 
> >> load averages:  10.0,  3.17,  2.06;        up 16+01:28:30 10:10:27      
> >> 93 processes: 92 sleeping, 1 on CPU 
> > 
> > Load averages 10.0! 3.17! 2.06! 93 processes, 1 on CPU?
> > 
> 
> 	1 process on CPU (nfs), but if I understand, threads are running on
> different cores :
> 

Yep, but you can count only on 4 cores (hyperthreading is essential in
GPU and has almost no sense on CPU). With 4 times more threads than
the number of cores, the synchronization between threads in a single
process can be the responsible for the delays. FWIW.

-- 
        Thierry Laronde <tlaronde +AT+ kergis +dot+ com>
                     http://www.kergis.com/
                    http://kertex.kergis.com/
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