From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/oprofile/oprofile_stats.c | 84 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 drivers/oprofile/oprofile_stats.c (limited to 'drivers/oprofile/oprofile_stats.c') diff --git a/drivers/oprofile/oprofile_stats.c b/drivers/oprofile/oprofile_stats.c new file mode 100644 index 000000000..59659cea4 --- /dev/null +++ b/drivers/oprofile/oprofile_stats.c @@ -0,0 +1,84 @@ +/** + * @file oprofile_stats.c + * + * @remark Copyright 2002 OProfile authors + * @remark Read the file COPYING + * + * @author John Levon + */ + +#include +#include +#include +#include + +#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(op_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); + atomic_set(&oprofile_stats.multiplex_counter, 0); +} + + +void oprofile_create_stats_files(struct dentry *root) +{ + struct oprofile_cpu_buffer *cpu_buf; + struct dentry *cpudir; + struct dentry *dir; + char buf[10]; + int i; + + dir = oprofilefs_mkdir(root, "stats"); + if (!dir) + return; + + for_each_possible_cpu(i) { + cpu_buf = &per_cpu(op_cpu_buffer, i); + snprintf(buf, 10, "cpu%d", i); + cpudir = oprofilefs_mkdir(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(cpudir, "sample_received", + &cpu_buf->sample_received); + oprofilefs_create_ro_ulong(cpudir, "sample_lost_overflow", + &cpu_buf->sample_lost_overflow); + oprofilefs_create_ro_ulong(cpudir, "backtrace_aborted", + &cpu_buf->backtrace_aborted); + oprofilefs_create_ro_ulong(cpudir, "sample_invalid_eip", + &cpu_buf->sample_invalid_eip); + } + + oprofilefs_create_ro_atomic(dir, "sample_lost_no_mm", + &oprofile_stats.sample_lost_no_mm); + oprofilefs_create_ro_atomic(dir, "sample_lost_no_mapping", + &oprofile_stats.sample_lost_no_mapping); + oprofilefs_create_ro_atomic(dir, "event_lost_overflow", + &oprofile_stats.event_lost_overflow); + oprofilefs_create_ro_atomic(dir, "bt_lost_no_mapping", + &oprofile_stats.bt_lost_no_mapping); +#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX + oprofilefs_create_ro_atomic(dir, "multiplex_counter", + &oprofile_stats.multiplex_counter); +#endif +} -- cgit v1.2.3-54-g00ecf