lkml.org 
[lkml]   [1998]   [Aug]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: Winmodem support, some performance tradeoff estimates
Thomas Sailer wrote:
>Of course you slow down the system, because there will be a task that
>consumes
>25% of the CPU. But then again "most" users won't notice a decrease in
>interactive response :-) (you can simulate that if you want, just write
>a SCHED_FIFO
>task that consumes 25% of the CPU).

It is misleading to say that soft modem support would consume
"25% of the CPU" without saying what kind of CPU. You should say
that it would consume approximately some amount of MIPS. For example,
if your code consumes 25% of the CPU on a 100MHz Pentium, then it
consumes about 3.7% of the CPU on a 450MHz Pentium 2.

Anyhow, according to linker@ml.org, at least the Rockwell based Winmodems
have significantly more hardware than a truely soft modem, so it should
not be anywhere near the CPU load of a truely soft modem.

Adam J. Richter __ ______________ 4880 Stevens Creek Blvd, Suite 205
adam@yggdrasil.com \ / San Jose, California 95129-1034
+1 408 261-6630 | g g d r a s i l United States of America
fax +1 408 261-6631 "Free Software For The Rest Of Us."

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.altern.org/andrebalsa/doc/lkml-faq.html

\
 
 \ /
  Last update: 2005-03-22 13:44    [W:0.035 / U:0.932 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site