mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-02 06:36:43 +07:00
2b8777ca0c
The bt_lost_no_mapping is not getting reset at the start of a profiling run, thus the oprofiled.log shows erroneous values for this statistic. The attached patch fixes this problem. Signed-off-by: Maynard Johnson <maynardj@us.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/**
|
|
* @file oprofile_stats.c
|
|
*
|
|
* @remark Copyright 2002 OProfile authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author John Levon
|
|
*/
|
|
|
|
#include <linux/oprofile.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/threads.h>
|
|
|
|
#include "oprofile_stats.h"
|
|
#include "cpu_buffer.h"
|
|
|
|
struct oprofile_stat_struct oprofile_stats;
|
|
|
|
void oprofile_reset_stats(void)
|
|
{
|
|
struct oprofile_cpu_buffer *cpu_buf;
|
|
int i;
|
|
|
|
for_each_possible_cpu(i) {
|
|
cpu_buf = &per_cpu(cpu_buffer, i);
|
|
cpu_buf->sample_received = 0;
|
|
cpu_buf->sample_lost_overflow = 0;
|
|
cpu_buf->backtrace_aborted = 0;
|
|
cpu_buf->sample_invalid_eip = 0;
|
|
}
|
|
|
|
atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
|
|
atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
|
|
atomic_set(&oprofile_stats.event_lost_overflow, 0);
|
|
atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
|
|
}
|
|
|
|
|
|
void oprofile_create_stats_files(struct super_block *sb, struct dentry *root)
|
|
{
|
|
struct oprofile_cpu_buffer *cpu_buf;
|
|
struct dentry *cpudir;
|
|
struct dentry *dir;
|
|
char buf[10];
|
|
int i;
|
|
|
|
dir = oprofilefs_mkdir(sb, root, "stats");
|
|
if (!dir)
|
|
return;
|
|
|
|
for_each_possible_cpu(i) {
|
|
cpu_buf = &per_cpu(cpu_buffer, i);
|
|
snprintf(buf, 10, "cpu%d", i);
|
|
cpudir = oprofilefs_mkdir(sb, dir, buf);
|
|
|
|
/* Strictly speaking access to these ulongs is racy,
|
|
* but we can't simply lock them, and they are
|
|
* informational only.
|
|
*/
|
|
oprofilefs_create_ro_ulong(sb, cpudir, "sample_received",
|
|
&cpu_buf->sample_received);
|
|
oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
|
|
&cpu_buf->sample_lost_overflow);
|
|
oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted",
|
|
&cpu_buf->backtrace_aborted);
|
|
oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip",
|
|
&cpu_buf->sample_invalid_eip);
|
|
}
|
|
|
|
oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
|
|
&oprofile_stats.sample_lost_no_mm);
|
|
oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
|
|
&oprofile_stats.sample_lost_no_mapping);
|
|
oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
|
|
&oprofile_stats.event_lost_overflow);
|
|
oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping",
|
|
&oprofile_stats.bt_lost_no_mapping);
|
|
}
|