[linux-audio-user] latency test problem

[Patrick Shirkey]

anton wrote:
> Hi,
> I want to measure the latency of my linux box before installing the low lat 
> kernel. I found  the latencytest0.42-png program.
> When compiling I get some warnings (see below) 
> 
> 
> anton at stereocilia:~/latencytest0.42-png> make
> gcc -Wall -O2 -DUSE_PENTIUM_TIMER -c latencytest.c
> latencytest.c: In function `main':
> latencytest.c:156: warning: passing arg 2 of `signal' from incompatible 
> pointer type
> latencytest.c:157: warning: passing arg 2 of `signal' from incompatible 
> pointer type
> gcc -Wall -O2 -DUSE_PENTIUM_TIMER -c gfx.c
> gcc -o latencytest latencytest.o gfx.o -lm -lgd -lpng
> gcc -Wall -O2 -DUSE_PENTIUM_TIMER -c rtc_latencytest.c
> rtc_latencytest.c: In function `main':
> rtc_latencytest.c:142: warning: passing arg 2 of `signal' from incompatible 
> pointer type
> rtc_latencytest.c:143: warning: passing arg 2 of `signal' from incompatible 
> pointer type
> gcc -o rtc_latencytest rtc_latencytest.o gfx.o -lm -lgd -lpng
> 

It fails to compile the rtc test but should still work for hte other tests.


> Running ./do_tests  gives me lots of errors:
> 

Are you running this with root privs? You don't appear to be.

> anton at stereocilia:~/latencytest0.42-png> ./do_tests
> mlockall() failed, exiting. mlock: Operation not permitted
> x11perf - X11 performance program, version 1.5
> The XFree86 Project, Inc server version 40200000 on :0.0
> from stereocilia
> Sun Nov 10 18:03:41 2002
> 
> Sync time adjustment is 0.1274 msecs.
> 
>   20000 reps @   0.4161 msec (  2400.0/sec): Scroll 500x500 pixels
> 	 [more output here]
> 
>    1200 reps @   5.9190 msec (   169.0/sec): ShmPutImage 500x500 square
>   	 [more output here]
> 
> mv: cannot stat `out.png': No such file or directory
> mlockall() failed, exiting. mlock: Operation not permitted
> mv: cannot stat `out.png': No such file or directory
> mlockall() failed, exiting. mlock: Operation not permitted
> head: /dev/zero: invalid number of bytes
> mv: cannot stat `out.png': No such file or directory
> -rw-r--r--    1 anton    users           0 2002-11-10 18:05 tmpfile
> mlockall() failed, exiting. mlock: Operation not permitted
> mv: cannot stat `out.png': No such file or directory
> -rw-r--r--    1 anton    users           0 2002-11-10 18:05 tmpfile
> -rw-r--r--    1 anton    users           0 2002-11-10 18:05 tmpfile2
> mlockall() failed, exiting. mlock: Operation not permitted
> -rw-r--r--    1 anton    users           0 2002-11-10 18:05 tmpfile
> -rw-r--r--    1 anton    users           0 2002-11-10 18:05 tmpfile2
> mv: cannot stat `out.png': No such file or directory
> 
> I am using Suse 8.1 with the default 2.4.19 kernel. It is probably something 
> very stupid but I cannot figure out what. Any help would be appreciated.
> 
> Regards 
> Anton
> 
> 
> 


-- 
Patrick Shirkey - Boost Hardware Ltd.
For the discerning hardware connoisseur
Http://www.boosthardware.com
Http://www.djcj.org - The Linux Audio Users guide
========================================

Being on stage with the band in front of crowds shouting, "Get off! No! 
We want normal music!", I think that was more like acting than anything 
I've ever done.

Goldie, 8 Nov, 2002
The Scotsman