Messages in this thread | | | Date | Mon, 18 Nov 2002 18:53:01 +1100 (EST) | From | Tim Connors <> | Subject | Re: 2.5.47 scheduler problems? |
| |
On Mon, 18 Nov 2002, Mike Galbraith wrote:
> > > If I do the same in 2.5.47, I have no control of my box. Setting > all tasks > > > to SCHED_FIFO or SCHED_RR prior to starting make -j10 bzImage, I can > regain > > > control, but interactivity under load is basically not present. > > > > Funny that. > > > > > I used to be able to wave a window poorly at make -j25 (swapping > heftily), > > > fairly smoothly at make -j20, and smoothly at make -j15 or below. > This > > > with no SCHED_RR/SCHED_FIFO. (I haven't done much testing like this > in > > > quite a while though) > > > > Perhaps you should consider buying an extra 29 CPU's for you desktop? > > I have neither the need for 30 CPUs, nor the cash to pay for such a > beast :) > > I gather you think my test is silly?
Well, yes, 30 processes at a time on a single CPU does seem a bit silly - given that (under the old system), you would not expect X to get more than 3% of the CPU time. Also sceduling normal processes (ie, not real-time processes) as RR/FIFO seemed also pretty bad.
However....
But I have to now admit that I haven't yet played with 2.5.47 seriously, and wansn't aware of the problems which Andrew just posted.
mea culpa.
-- TimC -- http://astronomy.swin.edu.au/staff/tconnors/
If you ever fear that machines will surpass humans in intelligence, just ask Microsoft to write the OS. -- POTU in RHOD
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |