perf_counter: x86: self-IPI for pending work

Browse source

Implement set_perf_counter_pending() with a self-IPI so that it will
run ASAP in a usable context.

For now use a second IRQ vector, because the primary vector pokes
the apic in funny ways that seem to confuse things.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090406094517.724626696@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Peter Zijlstra 2009-04-06 11:45:03 +02:00 • committed by Ingo Molnar

parent 671dec5daf

commit b6276f353b

10 changed files with 33 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/x86/include/asm/entry_arch.h

View file

1

arch/x86/include/asm/hardirq.h

View file

1

arch/x86/include/asm/hw_irq.h

View file

5

arch/x86/include/asm/irq_vectors.h

View file

3

arch/x86/include/asm/perf_counter.h

View file

14

arch/x86/kernel/cpu/perf_counter.c

View file

2

arch/x86/kernel/entry_64.S

View file

5

arch/x86/kernel/irq.c

View file

1

arch/x86/kernel/irqinit_32.c

View file

1

arch/x86/kernel/irqinit_64.c

View file