Re: [PATCH 5/5] Only call rebalance_domains when needed from scheduler_tick

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Christoph Lameter wrote:
On Thu, 26 Oct 2006, Nick Piggin wrote:


Call rebalance_domains from a tasklet with interrupt enabled.
Only call it when one of the sched domains is to be rebalanced.
The jiffies when the next balancing action is to take place is
kept in a per cpu variable next_balance.

sched-domains was supposed to be able to build a whacky topology
so you didn't have to take the occasional big latency hit when
scanning 512 CPUs...


How is that supposed to work? The load calculations will be off
in that case and also the load balancing algorithm wont work anymore. This is going to be a pretty significant rework of how the scheduler works but given the problems with pinned tasks... maybe that is necessary?
duler?

What will the problem be? Sure it may pull tasks fom one group to
another when both could actually be pulling from a third, but it
the load balancing algorithm should work fine and not require any
rework.

--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com -
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux