diff options
author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-06-27 13:41:37 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-06-27 14:31:46 +0200 |
commit | 83378269a5fad98f562ebc0f09c349575e6cbfe1 (patch) | |
tree | 516128bff6cfe915f93b983e3fe96733707ce09c /.mailmap | |
parent | 243e0e7b7d3b54749ece2e879ecd7e2a11874443 (diff) |
sched: correct wakeup weight calculations
rw_i = {2, 4, 1, 0}
s_i = {2/7, 4/7, 1/7, 0}
wakeup on cpu0, weight=1
rw'_i = {3, 4, 1, 0}
s'_i = {3/8, 4/8, 1/8, 0}
s_0 = S * rw_0 / \Sum rw_j ->
\Sum rw_j = S*rw_0/s_0 = 1*2*7/2 = 7 (correct)
s'_0 = S * (rw_0 + 1) / (\Sum rw_j + 1) =
1 * (2+1) / (7+1) = 3/8 (correct
so we find that adding 1 to cpu0 gains 5/56 in weight
if say the other cpu were, cpu1, we'd also have to calculate its 4/56 loss
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to '.mailmap')
0 files changed, 0 insertions, 0 deletions