Thank you Raul,
Conceptually, the primitives are simple. T. is for configuration and
setup. You always have one thread (the master thread), and you
probably should have one additional thread for each cpu "core" (which
you might think of as a register set -- a small set of variables that
It would be sufficient to create threadpool when starting an application.
No need to bother how many threads are available inside the application.
Eg if your machine has 8 CPU, then create 7 threads for pool 0 (for CPU
bounded tasks) and 56 threads for pool 1 (for I/O bounded tasks)
On Thu, Dec 22
Hi Ed,
I hope you are well.
If you are willing, do you mind sharing a comparison of the routine that
you improved (with some commentary)?
Ak
>
>
--
For information about J forums see http://www.jsoftware.com/forums.htm
Hi Bill,
How is a threadpool assigned?
For clarity, can you please show two sample commands?
The command that creates threads in threadpool 0.
The command that creates threads in threadpool 1.
Thank you for your help.
Ak
>
--
create thread pool:
MAXTHREADS_z_=: {: 8 T.''
echo 'MAXTHREADS: ',": MAXTHREADS
3 : 0''
if. 1. (<:9!:56'cores') <. (<:MAXTHREADS)- 1 T. '')
echo 'thread pool#0: ', ": n1=. 1 T. ''
0&T."0^:(0 < #) 1$~ (1 >. (<:MAXTHREADS)- 1 T. '')
echo 'thread pool#1: ', ": (1 T. '') - n1
end.
)
for cpu intensi
On Wed, Dec 21, 2022 at 8:07 PM Ak O wrote:
> setthreadcount=: {{
> change=. y-1 T.''
> T.&''"0 (|change)#(*change){0 0 55
> 1 T.''
> }}
>
> To accomplish this, you might use a routine like
> setthreadcount=: {{
>change=. y-1 T.''
> -NB. Does this set 'change' to a maxim
Note that you could have used the 'setthreadcount' implementation for this:
setthreadcount <:{:8T.''
However, I'm not sure that creating the maximum number of threads is
going to be the most efficient approach. (In some cases it might be.)
Also, I'm realizing that I should have included that dec
Oh, wait.. I guess I'm ignorant of the thread grouping issues.
Please ignore this previous email.
Thanks,
--
Raul
On Wed, Dec 21, 2022 at 10:55 PM Raul Miller wrote:
>
> Note that you could have used the 'setthreadcount' implementation for this:
>
> setthreadcount <:{:8T.''
>
> However, I'm n
Thank you Bill,
Are these two lines equivalent?
T.&''"0 (|change)#(*change){1 0 55
0&T.''0^:(0 < #)1$~(1>. (<:MAXTHREADS)-1 T.'')
Raul's example:
setthreadcount=: {{
change=. y-1 T.''
T.&''"0 (|change)#(*change){0 0 55
1 T.''
}}
Ak.
On Wed., Dec. 21, 2022, 19:20 bill
I am not sure. But you can check the number of thread created.
On Thu, 22 Dec 2022 at 2:28 PM Ak O wrote:
> Thank you Bill,
>
> Are these two lines equivalent?
>
> T.&''"0 (|change)#(*change){1 0 55
>
> 0&T.''0^:(0 < #)1$~(1>. (<:MAXTHREADS)-1 T.'')
>
>
> Raul's example:
>
> setthreadcount=: {{
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