Re: [linux-audio-dev] Re: laptop audio performance chart ... any realworld tests ?

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Subject: Re: [linux-audio-dev] Re: laptop audio performance chart ... any realworld tests ?
From: jfm3 (jfm3_AT_mortmain.com)
Date: Tue Jul 10 2001 - 03:51:34 EEST

Benno,

Thank you for the fix to rtc_latencytest.

Well, for better or for worse, the results of running

./do_tests none 3 256 0 350000000

are up at

http://www.ouroboros-complex.org/3x256.html

I'm not exactly sure how to interpret the results, but it I guess there
was an overrun. Am I running the right patch? My patch file starts
like this:

diff -urN linux-2.4.5/arch/i386/config.in linux/arch/i386/config.in
--- linux-2.4.5/arch/i386/config.in Thu May 24 15:14:08 2001
+++ linux/arch/i386/config.in Wed May 30 10:50:38 2001
@@ -26,6 +26,9 @@

I ran tunedisk on /dev/hda and /dev/hdc. There are no other disks.
/proc/sys/kernel/lowlatency is 1, I checked twice. Things are presently
responsive enough for me to perform with, but I sure would rather be
kicking all those windows boxes on the rme site in the hiney. Thanks
for any help.

(jfm3)

Benno Senoner wrote:

> I think on 2.4 you do need to
>
> #include <linux/rtc.h>
>
> rather than:
>
> #include <linux/mc146818rtc.h>
>
>
> anyway you won't need rtc_latencytest if you are only interested in audio
> latencies.
>
> The compilation error is the same than the one reported by Patrick Shirkey so
> he should be able to produce graphs too.
>
> Laptop guys, let us know !
>
> cheers,
> Benno.
>
>
> On Monday 09 July 2001 22:15, jfm3 wrote:
>
>
>>I tried compiling and it failed like this:
>>
>>
>>(Mon Jul 9 16:02:19) (jfm3_AT_codex:~/latencytest0.42-png)
>>bash> 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
>>In file included from rtc_latencytest.c:13:
>>/usr/include/linux/mc146818rtc.h:18: parse error before `rtc_lock'
>>/usr/include/linux/mc146818rtc.h:18: warning: data definition has no
>>type or storage class
>>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
>>make: *** [rtc_latencytest.o] Error 1
>>
>>

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