[Openmcl-devel] native threads

[Taoufik Dachraoui]

why ccl is much slower?

taoufik at Ankbot:~/workspace/ccl/actor$ sbcl
This is SBCL 2.3.11, an implementation of ANSI Common Lisp.
More information about SBCL is available at <http://www.sbcl.org/>.

SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.
* (time (prog1 t (loop for i from 0 upto 100000000 collect i)))
Evaluation took:
  1.379 seconds of real time
  1.379015 seconds of total run time (0.856185 user, 0.522830 system)
  [ Real times consist of 1.143 seconds GC time, and 0.236 seconds non-GC
time. ]
  [ Run times consist of 1.146 seconds GC time, and 0.234 seconds non-GC
time. ]
  100.00% CPU
  2,913,031,106 processor cycles
  1,600,427,200 bytes consed

T
* (quit)
taoufik at Ankbot:~/workspace/ccl/actor$ ccl
Clozure Common Lisp Version 1.12.1 (v1.12.1-22-g6b1f1d3a) LinuxX8664

For more information about CCL, please see http://ccl.clozure.com.

CCL is free software.  It is distributed under the terms of the Apache
Licence, Version 2.0.
? (time (prog1 t (loop for i from 0 upto 100000000 collect i)))
(PROG1 T (LOOP FOR I FROM 0 UPTO 100000000 COLLECT I))
took 11,946,514 microseconds (11.946514 seconds) to run.
     11,147,722 microseconds (11.147722 seconds, 93.31%) of which was spent
in GC.
During that period, and with 24 available CPU cores,
     11,632,370 microseconds (11.632370 seconds) were spent in user mode
        292,428 microseconds ( 0.292428 seconds) were spent in system mode
 1,600,000,032 bytes of memory allocated.
 397,400 minor page faults, 0 major page faults, 0 swaps.
T
?

On Fri, Jan 5, 2024 at 3:28 PM Taoufik Dachraoui <
dachraoui.taoufik at gmail.com> wrote:

> It looks like it is not because of the threads:
>
> taoufik at Ankbot:~/workspace/ccl/actor$ sbcl
> This is SBCL 2.3.11, an implementation of ANSI Common Lisp.
> More information about SBCL is available at <http://www.sbcl.org/>.
>
> SBCL is free software, provided as is, with absolutely no warranty.
> It is mostly in the public domain; some portions are provided under
> BSD-style licenses.  See the CREDITS and COPYING files in the
> distribution for more information.
> * (time (reduce #'+ (loop for i from 0 upto 100000000 collect i)))
> Evaluation took:
>   1.836 seconds of real time
>   1.835223 seconds of total run time (1.351394 user, 0.483829 system)
>   [ Real times consist of 1.184 seconds GC time, and 0.652 seconds non-GC
> time. ]
>   [ Run times consist of 1.184 seconds GC time, and 0.652 seconds non-GC
> time. ]
>   99.95% CPU
>   3,876,850,246 processor cycles
>   1,600,427,200 bytes consed
>
> 5000000050000000
> * taoufik at Ankbot:~/workspace/ccl/actor$ ccl
> Clozure Common Lisp Version 1.12.1 (v1.12.1-22-g6b1f1d3a) LinuxX8664
>
> For more information about CCL, please see http://ccl.clozure.com.
>
> CCL is free software.  It is distributed under the terms of the Apache
> Licence, Version 2.0.
> ? (time (reduce #'+ (loop for i from 0 upto 100000000 collect i)))
> (REDUCE #'+ (LOOP FOR I FROM 0 UPTO 100000000 COLLECT I))
> took 13,091,079 microseconds (13.091079 seconds) to run.
>      11,036,666 microseconds (11.036666 seconds, 84.31%) of which was
> spent in GC.
> During that period, and with 24 available CPU cores,
>      12,734,283 microseconds (12.734283 seconds) were spent in user mode
>         336,005 microseconds ( 0.336005 seconds) were spent in system mode
>  1,600,000,032 bytes of memory allocated.
>  397,400 minor page faults, 0 major page faults, 0 swaps.
> 5000000050000000
> ?
>
> On Fri, Jan 5, 2024 at 3:10 PM Taoufik Dachraoui <
> dachraoui.taoufik at gmail.com> wrote:
>
>> Hi
>>
>> In my current implementation of a classical actor model
>> I found that using ccl processes is much slower than sbcl threads
>>
>> to create a thread I use ccl:process-run-function, is there another way
>> to
>> create native threads that are much faster; I do not need the ccl
>> scheduling,
>> I want to create threads that are scheduled by the OS, I think that the
>> ccl
>> scheduler is the reason why my ccl tests are much slower than the tests
>> run
>> with sbcl
>>
>> Regards
>> --
>> Taoufik Dachraoui
>>
>>
>
> --
> Taoufik Dachraoui
>
>

-- 
Taoufik Dachraoui
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