lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/include/asm/irq_vectors.h
View File

@@ -116,6 +116,11 @@
*/
#define GENERIC_INTERRUPT_VECTOR 0xed
/*
* Performance monitoring pending work vector:
*/
#define LOCAL_PENDING_VECTOR 0xec
/*
* First APIC vector available to drivers: (vectors 0x30-0xee) we
* start at 0x31(0x41) to spread out vectors evenly between priority