RE: Mainline kernel OLTP performance update

[Styner, Douglas W]

Peter Ziljstra writes:
>
>I've had several reports about the resched-ipi going in overdrive, but
>nobody bothered to bisect it, nor have I yet done so -- no clear ideas
>on why it is doing so.
>
>I'll put it somewhere higher on the todo list.

FWIW, here is the interrupt data I was referring to.  The kernel delta refers to the difference in /proc/interrupts between the start and end of the run.  All database processes are running SCHED_RR.

                               2.6.24.2   2.6.30-rc3 
                                 delta       delta    % change
PCI-MSI-edge    qla2xxx         5270060     6118088      16.1%
PCI-MSI-edge    qla2xxx         5630742     5439656      -3.4%
PCI-MSI-edge    qla2xxx         5836425     5938014       1.7%
PCI-MSI-edge    qla2xxx         5774269     6007126       4.0%
PCI-MSI-edge    qla2xxx         5239457     5774888      10.2%
PCI-MSI-edge    qla2xxx         5965193     5424013      -9.1%
PCI-MSI-edge    eth0           31404141    32443614       3.3%
PCI-MSI-edge    eth1               1754        1453     -17.2%
Non-maskable interrupts        14041623    12980424      -7.6%
Local timer interrupts         27948168    28911532       3.4%
Rescheduling interrupts         1905119     4226516     121.9%
Function call interrupts            210          49     -76.7%
TLB shootdowns                      684        1455     112.7%

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