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Merge branch 'oprofile-for-tip' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into x86/urgent

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This commit is contained in:
Ingo Molnar 2008-11-07 19:22:10 +01:00
commit 01aab518b0
3 changed files with 8 additions and 9 deletions
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2
arch/Kconfig
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@ -21,7 +21,7 @@ config OPROFILE_IBS
Instruction-Based Sampling (IBS) is a new profiling
technique that provides rich, precise program performance
information. IBS is introduced by AMD Family10h processors
(AMD Opteron Quad-Core processor “Barcelona”) to overcome
(AMD Opteron Quad-Core processor "Barcelona") to overcome
the limitations of conventional performance counter
sampling.

9
arch/x86/oprofile/op_model_ppro.c
View File

@ -27,8 +27,7 @@ static int num_counters = 2;
static int counter_width = 32;
#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)
#define CTR_READ(l, h, msrs, c) do {rdmsr(msrs->counters[(c)].addr, (l), (h)); } while (0)
#define CTR_OVERFLOWED(n) (!((n) & (1U<<(counter_width-1))))
#define CTR_OVERFLOWED(n) (!((n) & (1ULL<<(counter_width-1))))
#define CTRL_IS_RESERVED(msrs, c) (msrs->controls[(c)].addr ? 1 : 0)
#define CTRL_READ(l, h, msrs, c) do {rdmsr((msrs->controls[(c)].addr), (l), (h)); } while (0)
@ -124,14 +123,14 @@ static void ppro_setup_ctrs(struct op_msrs const * const msrs)
static int ppro_check_ctrs(struct pt_regs * const regs,
struct op_msrs const * const msrs)
{
unsigned int low, high;
u64 val;
int i;
for (i = 0 ; i < num_counters; ++i) {
if (!reset_value[i])
continue;
CTR_READ(low, high, msrs, i);
if (CTR_OVERFLOWED(low)) {
rdmsrl(msrs->counters[i].addr, val);
if (CTR_OVERFLOWED(val)) {
oprofile_add_sample(regs, i);
wrmsrl(msrs->counters[i].addr, -reset_value[i]);
}

6
drivers/oprofile/event_buffer.c
View File

@ -105,7 +105,7 @@ static int event_buffer_open(struct inode *inode, struct file *file)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (test_and_set_bit(0, &buffer_opened))
if (test_and_set_bit_lock(0, &buffer_opened))
return -EBUSY;
/* Register as a user of dcookies
@ -129,7 +129,7 @@ static int event_buffer_open(struct inode *inode, struct file *file)
fail:
dcookie_unregister(file->private_data);
out:
clear_bit(0, &buffer_opened);
__clear_bit_unlock(0, &buffer_opened);
return err;
}
@ -141,7 +141,7 @@ static int event_buffer_release(struct inode *inode, struct file *file)
dcookie_unregister(file->private_data);
buffer_pos = 0;
atomic_set(&buffer_ready, 0);
clear_bit(0, &buffer_opened);
__clear_bit_unlock(0, &buffer_opened);
return 0;
}