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Diffstat (limited to 'drivers/oprofile/oprofile_stats.c')
-rw-r--r--drivers/oprofile/oprofile_stats.c84
1 files changed, 84 insertions, 0 deletions
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 <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(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
+}