From: Frederic GAVA <frederic.gava@wanadoo.fr>
To: Brian Hurt <bhurt@janestcapital.com>,
ls-ocaml-developer-2006@m-e-leypold.de
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Multiplication of matrix in C and OCaml
Date: Fri, 9 Feb 2007 15:24:14 +0100 (CET) [thread overview]
Message-ID: <25200556.147861171031054008.JavaMail.www@wwinf1630> (raw)
> For the C side, I recommend using clock() to time the runs. This also
> factors out the cost of creating the random matricies. Basically, you
> just do:
>
> #include
>
> ...
> {
> clock_t start, stop;
> ...
> start = clock();
> /* stuff to time here */
> stop = clock();
> printf("The amount of time taken = %f seconds\n",
> ((double)(stop-start))/((double) CLOCKS_PER_SEC));
> /* write result to file */
> }
Many parallel C libraries have also there own timer.
MPI=> MPI_Wtime
BSPlib => bsp_time
PVM=>...
It is very usefull because they do not take into account time to initialize the parallel machine...
Frédéric Gava
next reply other threads:[~2007-02-09 14:24 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-09 14:24 Frederic GAVA [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-02-07 23:42 Frédéric Gava
2007-02-08 2:14 ` [Caml-list] " Jacques Garrigue
2007-02-08 9:27 ` Frédéric Gava
2007-02-08 9:38 ` Frédéric Gava
2007-02-08 12:08 ` Jacques Garrigue
2007-02-08 9:56 ` Frédéric Gava
2007-02-08 10:45 ` Xavier Leroy
2007-02-08 15:16 ` Frédéric Gava
2007-02-09 2:58 ` Jacques Garrigue
2007-02-09 9:06 ` ls-ocaml-developer-2006
2007-02-09 10:32 ` ls-ocaml-developer-2006
2007-02-09 14:22 ` skaller
2007-02-09 21:47 ` ls-ocaml-developer-2006
2007-02-09 21:55 ` Andrej Bauer
2007-02-09 22:36 ` ls-ocaml-developer-2006
2007-02-09 23:53 ` Jon Harrop
2007-02-10 1:41 ` ls-ocaml-developer-2006
2007-02-10 2:24 ` Jon Harrop
2007-02-10 14:41 ` ls-ocaml-developer-2006
2007-02-10 14:52 ` Jon Harrop
2007-02-10 15:51 ` ls-ocaml-developer-2006
2007-02-10 16:10 ` Xavier Leroy
2007-02-10 16:11 ` Jon Harrop
2007-02-10 14:55 ` Mattias Engdegård
2007-02-11 13:13 ` Christophe Raffalli
2007-02-10 1:10 ` Brian Hurt
2007-02-10 1:16 ` Robert Roessler
2007-02-09 23:56 ` Jon Harrop
2007-02-09 12:05 ` Jon Harrop
2007-02-09 12:35 ` ls-ocaml-developer-2006
2007-02-09 13:50 ` Brian Hurt
2007-02-09 14:23 ` Gerd Stolpmann
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