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OS X and kernel_tas high cpu usage

H

htmlmasterdave

Golden Member
I was wondering how Icould fix this... as soon as the modem is in use and until it's done, the kernel uses 15-25% cpu... all the time. I have sharing enabled if that matters. I've seen others having problems with this on the net but I didn't see anything with modems yet.

Why does this happen with OS X?

Thanks
 
I wonder if they're using userland ppp. I know with userland pppoe that's been known to happen, not sure about regular ppp though.
 
What's the difference between the two? This isn't a HUGE issue for me, but I will use it now and then, so it's a bit annoying (especially if I was using battery power)
 
Originally posted by: htmlmasterdave
What's the difference between the two? This isn't a HUGE issue for me, but I will use it now and then, so it's a bit annoying (especially if I was using battery power)
Click to expand...

I think it has to do with process handling. If it's in the kernel there's less overhead. I don't know if that's the issue, I don't use dialup anymore. 😉
 
Yeah, thanks for pointing it out 🙂 I guess I won't worry too much about using in on battery, 80% charge after 300 uses is a lot. If I use it half per day every day it will still last me like 2 years before it's down to 80% which isn't even that bad. They say to basically let it run down once a month... how many cycles you figure is optimal? A couple per week sorta thing?

BTW Anything else I should read I might have missed? 😉 (I already read the material that came with the iBook)
 
Originally posted by: htmlmasterdave
Yeah, thanks for pointing it out 🙂 I guess I won't worry too much about using in on battery, 80% charge after 300 uses is a lot. If I use it half per day every day it will still last me like 2 years before it's down to 80% which isn't even that bad. They say to basically let it run down once a month... how many cycles you figure is optimal? A couple per week sorta thing?

BTW Anything else I should read I might have missed? 😉 (I already read the material that came with the iBook)
Click to expand...

I can't think of anything off hand. I don't usually read too much of the documentation that comes with this stuff. 😛

When I use my powerbook, I start with it unplugged (unless the battery is already down), and plug it in after a while. I'm not going to worry about "correct use" and stuff too much, but basic knowledge is nice. 🙂
 
What model Mac do you use and which version of MacOS. If I'm not mistaken, the recent generation Macs use a software based modem so all the DSP functionality is done in the CPU, instead on a dedicated chip on the modem.

Either way, just moving the mouse around in OS X (any version) usually bring the cpu usage up somewhat because Carbon and Cocca is a beast.
 
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