[Openmcl-devel] run-program and performance

[Paul Griffioen]

Thanks for the reply.

In my case the communication is mainly from lisp to the program.

As I wrote, I am not really certain what is causing this and I am trying to
eliminate obvious candidates. Now at least I know that the streams are
buffered.

It seems not so easy to pinpoint this issue. I am running ccl from
binaries. Maybe I can run ccl from source and see if I can do some
experiments, or do some profiling. Would you have any suggestions? Or any
specific relevant ccl code I could look at?




2014-08-06 9:57 GMT+02:00 Gary Byers <gb at gse.com>:

> Is communication slow from the program to lisp, from lisp to the program,
> or in both directions ?
>
> Note that (almost) all streams in CCL are fully buffered, i.e., output
> may not actually be written to an underlyin device (file descriptor, file
> handle)
> until FORCE-OUTPUT is called; this is the same on Windows as on other
> platforms,
>
>
> On 08/03/2014 06:10:15 PM, Paul Griffioen wrote:
>
>> Hi everybody,
>>
>> I have some performance issues when a program is run with ccl:run-program
>> on Windows, and it looks like the communication to the program is slow. Is
>> there anyway I can check whether buffering on the streams is on or off?
>>
>> I am guessing at this moment, but I just want to make sure I am not
>> overlooking something obvious. See
>> https://gist.github.com/anonymous/80966ad2b1011de4a75e for the code.
>>
>> It runs fine on Linux. Similar code also runs fine in other Lisps on
>> Windows. Any clues would be appreciated.
>>
>> Paul
>>
>>
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>
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