Hi Cheetan... Thanks for your fast reply... On Wed, Jul 29, 2009 at 6:15 PM, Chetan Nanda<chetannanda@xxxxxxxxx> wrote: > > > On Wed, Jul 29, 2009 at 4:15 PM, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx> > wrote: >> >> Hi all >> >> I've tried to check related scheduler code and I've got impression >> that in CFS scheduler, dynamic priority level no longer determines >> which process will be picked up by the scheduler. Instead, it is now >> the waiting time that becomes the primary factor to watch...the longer >> it waits, thus it is treated "more unfair"...then it will be picked >> ASAP. Is this correct? > > > AFAIK, this is correct > >> >> If it is correct, then is it still useful to assign different nice >> level to mark the importance of a process? > > > Waiting time for different process are virtual time, I mean waiting time > depends on priority of the process also. > Waiting time of a process with higher priority will increase faster so that > it get picked sooner. Is it what I read as so called virtual clock? So, may I say that nice level (thus also dynamic priority, since I check that in CFS, static prio=dynamic prio..CMIIW) is somekind of weight factor of waiting time? -- regards, Mulyadi Santosa Freelance Linux trainer blog: the-hydra.blogspot.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
