worked perfectly, with epia (C3) cpu performance improved really.

cpu passed from 43% to 24% for zmc

a real gain!!!

thanks all

i ownder what difference sse3 would make. I must say that the increases in performance seem huge. But obviously only in the jpeg creating department. zma in modetc/mocord obviously still uses the bulk of cpu time. Is there a way of helping these processes or does analysing images take this power regardless due to the nature of the beast

Still working great here on my home system with one camera.

I wish I could apply it to my AMD64 8 camera system. I may have to re-do that box as 32bit just for the boost from this library.

-David

did you notice any major speed gains of 64bit over 32 bit? Obviously there are gains with the mmx but i wouldnt have thought in this application there were big gains in 64 bit, but i may be way off!! lol

It's got 6GB of RAM and there are some other things running on it, so I'd like to avoid taking the himem IO performance hit.

I doubt there'd be much of a processor performance difference going to 32bit, other than the huge gains i'd be able to get by using the jpeg-simd lib.

-David

6GIG whats it running??

jpeg-mmx also now works for me on slackware-current.

i'd just like to reiterate how much difference this alternative libjpeg makes. on a via epia en12000 with one local camera in record mode capturing in colour at 3fps and 640x480, user cpu usage (almost all zma) dropped from ~27% to ~11%. quite impressive. don't know how it'll perform long term yet, but loks good so far

neil

It's improved my system's ability to monitor a camera on-screen at 352x288 whilst capturing events from up to three cameras with less chance that frames will be lost.

EDIT: Probably shouldn't post last thing at night...

im starting to be convinced by its long term stabiliuty too

Ok, a bit behind the rest of you, but I've just installed the libs on both my Quad Xeon and the Athlon-64.

Both OS's running Debian Etch (Testing), both CPU sets have MMX capabilities. (Confirmed with cpuid)

Install as given by james.

make install failed on both machines due to:
/usr/bin/install: cannot create regular file `/usr/local/man/man1/cjpeg.1': No such file or directory

Easily fixed with a "mkdir /usr/local/man/man1" (Both my installs only had man4). Re-run make install, fine.

Xeon load before: 3.16 after: 1.86 (Rising to 2.50 depending on alarms)
Athlon load before: 0.86 after: 0.35 (Rising to 0.

No difference in usage that I can see. Thanks dbosso

Hi Flash.

So this library does run on 64-bit CPU? I recall there were remarks that the 64-bit support is not complete.

I suspect that's referring to a 64-bit OS.

I'm running a 32-bit kernel on a 64-bit CPU so as far as software's concerned, it's 32-bit. Sorry I didn't make that clear.

Hi.

Thanks for the information.

i can confirm good results on a Celeron 2.53GHz (512ram) with 2x DCS-900 (640x480 ~6fps) on modect (avg. 60% active area)

load average dropped from .6 to .4
idle CPU went from 66% to 76%