Re: [linux-audio-user] latency test problem

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Subject: Re: [linux-audio-user] latency test problem
From: Patrick Shirkey (pshirkey_AT_boosthardware.com)
Date: Mon Nov 11 2002 - 09:56:59 EET

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

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