From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 17 Mar 2006 13:09:51 +0100
From: Jan Kiszka <jan.kiszka@domain.hid>
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Sender: jan.kiszka@domain.hid
Subject: [Xenomai-core] [PATCH] reduce stack size in accuracy demo
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai-core <xenomai@xenomai.org>

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Hi Gilles,

running your accuracy demo on a resource restricted system aside a
hungry cache benchmark (as load) produced OOM too early. This patch
reduces the stack thread sizes (which get locked into memory) - and it
also demonstrates how to create RT-pthreads preferably.

Jan


PS: cyclictest now runs as expected with pthread_setschedparam, will
post some patch to the list and Thomas. I think it's useful as it can
create multiple timed threads, and it's POSIX (latency is native,
accuracy tests relative sleeping).

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Index: ksrc/skins/posix/demos/accuracy.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- ksrc/skins/posix/demos/accuracy.c	(revision 702)
+++ ksrc/skins/posix/demos/accuracy.c	(working copy)
@@ -12,6 +12,7 @@
 #include <unistd.h>
 #include <pthread.h>
 #include <semaphore.h>
+#include <limits.h>
=20
 #define SEMB_NAME "/semB"
=20
@@ -229,6 +230,7 @@ int main (int argc, char **argv)
     pthread_attr_setinheritsched(&thattrA,PTHREAD_EXPLICIT_SCHED);
     pthread_attr_setschedpolicy(&thattrA,SCHED_FIFO);
     pthread_attr_setschedparam(&thattrA,&paramA);
+    pthread_attr_setstacksize(&thattrA,PTHREAD_STACK_MIN);
     err =3D pthread_create(&thidA,&thattrA,&threadA,NULL);
=20
     if (err)
@@ -239,6 +241,7 @@ int main (int argc, char **argv)
     pthread_attr_setinheritsched(&thattrB,PTHREAD_EXPLICIT_SCHED);
     pthread_attr_setschedpolicy(&thattrB,SCHED_FIFO);
     pthread_attr_setschedparam(&thattrB,&paramB);
+    pthread_attr_setstacksize(&thattrB,PTHREAD_STACK_MIN);
     err =3D pthread_create(&thidB,&thattrB,&threadB,NULL);
=20
     if (err)


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