latencytests results on a Pentium133, again EXCELLENT, 2.1ms.:-)

[Benno Senoner <sbenno@gardena.net>]

Hi, folks,
I performed more latency benchmarks on an old Pentium box:
P133 , mainboard Tyan Tomcat HX, 64MB RAM, harddisk IBM EIDE 6GB,
 Soundcard TB Tropez plus, videocard S3 PCI.

To my surprise the results were excellent,  2.1ms !  ( 3x128 bytes audio buffer)
(even if the jitter is a bit higher than on a PII400 , but anyway very good !)

I lowered the CPU load to 60% since cpuload€% made the box quite unusable
(it's like running on a Pentium with 20-25Mhz  :-))

look at the results here:

http://www.gardena.net/benno/linux/audio/2.2.10-p133-3x128/3x128.html

Seems that Benjamin was right: a P166MMX Laptop can deliver the 3-4ms latency.
:-)

PS: I noticed that the TB Tropez plus, takes a few msecs to startup,
(after the first write() call) therefore just write an empty audio buffer
before entering the main loop.

regards,
Benno.

--
Benno Senoner
E-Mail: sbenno@gardena.net
Linux low latency audio / scheduling latency benchmarks:
http://www.gardena.net/benno/linux/audio