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x86/oprofile: Moving nmi_cpu_switch() in nmi_int.c

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This patch moves some code in nmi_int.c to get a single separate
multiplexing code section.

Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter 2009-07-09 14:38:49 +02:00
parent d0f585dd20
commit b28d1b923a
1 changed files with 70 additions and 74 deletions
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144
arch/x86/oprofile/nmi_int.c
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@ -97,6 +97,29 @@ static void nmi_cpu_save_registers(struct op_msrs *msrs)
}
}
static void nmi_cpu_start(void *dummy)
{
struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs);
model->start(msrs);
}
static int nmi_start(void)
{
on_each_cpu(nmi_cpu_start, NULL, 1);
return 0;
}
static void nmi_cpu_stop(void *dummy)
{
struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs);
model->stop(msrs);
}
static void nmi_stop(void)
{
on_each_cpu(nmi_cpu_stop, NULL, 1);
}
#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
static DEFINE_PER_CPU(int, switch_index);
@ -171,6 +194,53 @@ static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs)
}
}
static void nmi_cpu_switch(void *dummy)
{
int cpu = smp_processor_id();
int si = per_cpu(switch_index, cpu);
struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
nmi_cpu_stop(NULL);
nmi_cpu_save_mpx_registers(msrs);
/* move to next set */
si += model->num_counters;
if ((si > model->num_virt_counters) || (counter_config[si].count == 0))
per_cpu(switch_index, cpu) = 0;
else
per_cpu(switch_index, cpu) = si;
model->switch_ctrl(model, msrs);
nmi_cpu_restore_mpx_registers(msrs);
nmi_cpu_start(NULL);
}
/*
* Quick check to see if multiplexing is necessary.
* The check should be sufficient since counters are used
* in ordre.
*/
static int nmi_multiplex_on(void)
{
return counter_config[model->num_counters].count ? 0 : -EINVAL;
}
static int nmi_switch_event(void)
{
if (!model->switch_ctrl)
return -ENOSYS; /* not implemented */
if (nmi_multiplex_on() < 0)
return -EINVAL; /* not necessary */
on_each_cpu(nmi_cpu_switch, NULL, 1);
atomic_inc(&multiplex_counter);
return 0;
}
#else
inline int op_x86_phys_to_virt(int phys) { return phys; }
@ -325,29 +395,6 @@ static void nmi_shutdown(void)
put_cpu_var(cpu_msrs);
}
static void nmi_cpu_start(void *dummy)
{
struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs);
model->start(msrs);
}
static int nmi_start(void)
{
on_each_cpu(nmi_cpu_start, NULL, 1);
return 0;
}
static void nmi_cpu_stop(void *dummy)
{
struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs);
model->stop(msrs);
}
static void nmi_stop(void)
{
on_each_cpu(nmi_cpu_stop, NULL, 1);
}
static int nmi_create_files(struct super_block *sb, struct dentry *root)
{
unsigned int i;
@ -379,57 +426,6 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root)
return 0;
}
#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
static void nmi_cpu_switch(void *dummy)
{
int cpu = smp_processor_id();
int si = per_cpu(switch_index, cpu);
struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
nmi_cpu_stop(NULL);
nmi_cpu_save_mpx_registers(msrs);
/* move to next set */
si += model->num_counters;
if ((si > model->num_virt_counters) || (counter_config[si].count == 0))
per_cpu(switch_index, cpu) = 0;
else
per_cpu(switch_index, cpu) = si;
model->switch_ctrl(model, msrs);
nmi_cpu_restore_mpx_registers(msrs);
nmi_cpu_start(NULL);
}
/*
* Quick check to see if multiplexing is necessary.
* The check should be sufficient since counters are used
* in ordre.
*/
static int nmi_multiplex_on(void)
{
return counter_config[model->num_counters].count ? 0 : -EINVAL;
}
static int nmi_switch_event(void)
{
if (!model->switch_ctrl)
return -ENOSYS; /* not implemented */
if (nmi_multiplex_on() < 0)
return -EINVAL; /* not necessary */
on_each_cpu(nmi_cpu_switch, NULL, 1);
atomic_inc(&multiplex_counter);
return 0;
}
#endif
#ifdef CONFIG_SMP
static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action,
void *data)