Re: [Openpvr-devel] Quiet List.

[Brian J. M. <5cb...@in...>]

On Wed, Jun 05, 2002 at 08:47:04PM -0500, Monty Walls wrote:
> =20
> lazyness.  Looks like I'm going to have add the v4l2 patch set to my runn=
ing
> kernel.  With mp1e configured about the same as your's my K7-1200mhz drops
> about 20% of the frames.

Wow!  I get a few drops per hour (more depending on what else the box
is doing) but nothing near 20%.  How recent is your mp1e?  I am using
the mp1e from the rte project.  My last cvs update was May 13 11:54
(which means I should update again to see what's new :-)

> CPU load is only about 40%, so it's not that...

Seems a little high for a K7-1200Mhz when my Athlon TB 800 only goes
that high.

> If I drop to 640x240, I get essentially no drops using v4l, but have
> to run mp1e as real-time to do it (cheating).

I cheat.  :-)

> My realtime toy is attached

I do it right in mp1e:

Index: main.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
RCS file: /cvsroot/zapping/rte/mp1e/main.c,v
retrieving revision 1.33
diff -u -r1.33 main.c
--- main.c      13 May 2002 05:38:00 -0000      1.33
+++ main.c      6 Jun 2002 03:04:59 -0000
@@ -40,6 +40,7 @@
 #include <sys/mman.h>
 #include <sys/time.h>
 #include <sys/stat.h>
+#include <sys/resource.h>
 #include <asm/types.h>
=20
 #include "common/videodev2.h"
@@ -353,8 +354,13 @@
    program_invocation_name =3D argv[0];
 #endif
=20
+       errno =3D 0;
+       if (setpriority(PRIO_PROCESS, getpid(), -10) =3D=3D -1 && errno !=
=3D 0)
+               perror("mp1e: setpriority");
+
    options(ac, av);
=20
 #if 0
    if (mux_syn !=3D 4) {

--=20
Brian J. Murrell