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>
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/**
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* @file oprofile_stats.c
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*
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* @remark Copyright 2002 OProfile authors
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* @remark Read the file COPYING
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*
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* @author John Levon
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*/
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#include <linux/oprofile.h>
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#include <linux/smp.h>
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#include <linux/cpumask.h>
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#include <linux/threads.h>
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#include "oprofile_stats.h"
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#include "cpu_buffer.h"
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struct oprofile_stat_struct oprofile_stats;
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void oprofile_reset_stats(void)
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{
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struct oprofile_cpu_buffer *cpu_buf;
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int i;
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for_each_possible_cpu(i) {
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cpu_buf = &per_cpu(cpu_buffer, i);
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cpu_buf->sample_received = 0;
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cpu_buf->sample_lost_overflow = 0;
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cpu_buf->backtrace_aborted = 0;
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cpu_buf->sample_invalid_eip = 0;
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}
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atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
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atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
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atomic_set(&oprofile_stats.event_lost_overflow, 0);
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atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
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}
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void oprofile_create_stats_files(struct super_block *sb, struct dentry *root)
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{
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struct oprofile_cpu_buffer *cpu_buf;
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struct dentry *cpudir;
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struct dentry *dir;
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char buf[10];
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int i;
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dir = oprofilefs_mkdir(sb, root, "stats");
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if (!dir)
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return;
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for_each_possible_cpu(i) {
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cpu_buf = &per_cpu(cpu_buffer, i);
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snprintf(buf, 10, "cpu%d", i);
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cpudir = oprofilefs_mkdir(sb, dir, buf);
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/* Strictly speaking access to these ulongs is racy,
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* but we can't simply lock them, and they are
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* informational only.
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*/
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oprofilefs_create_ro_ulong(sb, cpudir, "sample_received",
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&cpu_buf->sample_received);
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oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
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&cpu_buf->sample_lost_overflow);
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oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted",
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&cpu_buf->backtrace_aborted);
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oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip",
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&cpu_buf->sample_invalid_eip);
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}
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oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
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&oprofile_stats.sample_lost_no_mm);
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oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
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&oprofile_stats.sample_lost_no_mapping);
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oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
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&oprofile_stats.event_lost_overflow);
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oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping",
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&oprofile_stats.bt_lost_no_mapping);
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}
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