--- Mark Vojkovich <[EMAIL PROTECTED]> a écrit : > > > On Tue, 23 Sep 2003, [iso-8859-1] emmanuel ALLAUD > wrote: > > > The problem with yielding is that you can have > > interactivity problem if the computer is loaded > > enough. > > If you don't yield you have an interactivity > problem. > What good is keeping your time slices if all you're > doing > during them is busy waiting?
Sure ;-) > > At least that's what I have understood will > > happen with 2.6 linux kernels. The problem is to > be > > able to tell the kernel : OK I know I have to wait > so > > I give the CPU back, but I am an interactive > process > > and I don't want my CPU back in 1 hour ;-) Perhaps > > there should be a "give my remaining slice time to > > someone else and then give me back the CPU" > scheduler > > hint? > > I'm not sure the 2.6 behavior sounds > significantly worse > than the 2.4 behavior. I really don't understand > what the > big deal is. I don't want the rest of my slice! I > have nothing > to do with it except busy wait. Sure it would nice > Linux > kernel didn't suck in this way, and I consider the > sched_yield() > change a regression and a bug, but we make due with > what we've > got and it's better than busy waiting. I totally agree. My point here is : how will yielding will compare with another technic (yet to be found) in terms of interactivity? You don't want to have to wait too long after yielding because other processes are crunching numbers or whatever. Actually I think the kernel guys should be able to tell the good way to achieve that. I know the scheduler is now smarter about interactivity (it will try to prioritize processes that are more interactive-like, so a good point would be to see if yielding will give us enough "interactive credit" so that we won't wait too long before reacquiring CPU). I amm not saying that yielding is bad, but just that now that the question is raised let's see if there is a better way to do it. BTW should I bring the question in kernel ML? Bye Manu ___________________________________________________________ Do You Yahoo!? -- Une adresse @yahoo.fr gratuite et en français ! Yahoo! Mail : http://fr.mail.yahoo.com _______________________________________________ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
