kernel_optimize_test/arch
Peter Zijlstra e4abb5d4f7 perf_counter: x86: Emulate longer sample periods
Do as Power already does, emulate sample periods up to 2^63-1 by
composing them of smaller values limited by hardware capabilities.
Only once we wrap the software period do we generate an overflow
event.

Just 10 lines of new code.

Reported-by: Stephane Eranian <eranian@googlemail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-02 21:45:31 +02:00
..
alpha alpha: unbreak percpu again 2009-05-12 14:11:35 -07:00
arm flat: fix data sections alignment 2009-05-29 08:40:02 -07:00
avr32
blackfin flat: fix data sections alignment 2009-05-29 08:40:02 -07:00
cris
frv
h8300 flat: fix data sections alignment 2009-05-29 08:40:02 -07:00
ia64
m32r flat: fix data sections alignment 2009-05-29 08:40:02 -07:00
m68k flat: fix data sections alignment 2009-05-29 08:40:02 -07:00
m68knommu
microblaze microblaze: Fix kind-of-intr checking against number of interrupts 2009-05-18 14:47:42 +02:00
mips MIPS: IP32: Remove unnecessary if not even harmful volatile keywords. 2009-05-22 13:52:06 +01:00
mn10300
parisc
powerpc perf_counter: Rename various fields 2009-06-02 21:45:30 +02:00
s390
sh flat: fix data sections alignment 2009-05-29 08:40:02 -07:00
sparc
um
x86 perf_counter: x86: Emulate longer sample periods 2009-06-02 21:45:31 +02:00
xtensa xtensa: Fix linker script to include .literal sections 2009-05-11 23:40:33 -07:00
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