Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / oprofile / oprofile_stats.c

diff --git a/kernel/drivers/oprofile/oprofile_stats.c b/kernel/drivers/oprofile/oprofile_stats.c
new file mode 100644 (file)
index 0000000..59659ce
--- /dev/null
+++ b/kernel/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
+}