-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Thursday 2007-04-19 at 16:03 +0800, Zhang Weiwu wrote:
First I thought maybe burning DVD is very CPU consuming, but later I see not even 15% CPU resource is being used, also I have Pentium D, that is there should be another CPU that's free, even if a process takes up 100% CPU.
We talked a few days back about cpu usage applet showing the iowait percent, too.
Memory? Still more than 700MB free memory (a.k.a 700MB cached memory)
Then I think it's maybe IDE HDD cannot be efficient if two processes are reading it the same time (growisofs is reading it, thus any other application using HDD become the second application). But, I am wrong! The source data of the DVD is on a NFS share so IDE bandwidth is not taken up.
What about network bandwidth? You are burning at 5x. I don't recollect what bandwidth is that... Ah, wikipedia to the rescue: 55.40 Mbit/s. That's about half the 100 Mbps bandwidth. Adding whatever the nfs adds, maybe you are close to the limit. Now, the network card might be taxing the system. I don't suppose they can work in polling mode? No, not possible, cpu usage would be high then.
Later I think is it possible it's that PCI bandwidth is used up? The network card is on the motherboard, there are 12 video chip on this computer (grouped by 4 on total of 3 PCI bus), although only 3 of the monitors are active (others are in power-saving mode).
That's a fair bit! :-)
So.. what's the real bottle-neck that slows my system down when burning DVD? Not a big problem because I can tolerate this slow, only curious...
You could perhaps recompile the kernel and adjust some parameters that affect responsiveness. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFGJ7n0tTMYHG2NR9URAk9dAJ97d5W6kA3SrjzmM6CTF7w3fwDEWACfXDhK w1PCzqbMNIS/f4JFyaW6wU0= =ISRp -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org