gator: Version 5.15
Signed-off-by: Jon Medhurst <tixy@linaro.org>
diff --git a/tools/gator/daemon/KMod.cpp b/tools/gator/daemon/KMod.cpp
new file mode 100644
index 0000000..04f3330
--- /dev/null
+++ b/tools/gator/daemon/KMod.cpp
@@ -0,0 +1,100 @@
+/**
+ * Copyright (C) ARM Limited 2013. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "KMod.h"
+
+#include <sys/types.h>
+#include <dirent.h>
+#include <unistd.h>
+
+#include "Collector.h"
+#include "Counter.h"
+#include "Logging.h"
+
+// Claim all the counters in /dev/gator/events
+bool KMod::claimCounter(const Counter &counter) const {
+ char text[128];
+ snprintf(text, sizeof(text), "/dev/gator/events/%s", counter.getType());
+ return access(text, F_OK) == 0;
+}
+
+void KMod::resetCounters() {
+ char base[128];
+ char text[128];
+
+ // Initialize all perf counters in the driver, i.e. set enabled to zero
+ struct dirent *ent;
+ DIR* dir = opendir("/dev/gator/events");
+ if (dir) {
+ while ((ent = readdir(dir)) != NULL) {
+ // skip hidden files, current dir, and parent dir
+ if (ent->d_name[0] == '.')
+ continue;
+ snprintf(base, sizeof(base), "/dev/gator/events/%s", ent->d_name);
+ snprintf(text, sizeof(text), "%s/enabled", base);
+ Collector::writeDriver(text, 0);
+ snprintf(text, sizeof(text), "%s/count", base);
+ Collector::writeDriver(text, 0);
+ }
+ closedir(dir);
+ }
+}
+
+void KMod::setupCounter(Counter &counter) {
+ char base[128];
+ char text[128];
+ snprintf(base, sizeof(base), "/dev/gator/events/%s", counter.getType());
+
+ snprintf(text, sizeof(text), "%s/enabled", base);
+ int enabled = true;
+ if (Collector::writeReadDriver(text, &enabled) || !enabled) {
+ counter.setEnabled(false);
+ return;
+ }
+
+ snprintf(text, sizeof(text), "%s/key", base);
+ int key = 0;
+ Collector::readIntDriver(text, &key);
+ counter.setKey(key);
+
+ snprintf(text, sizeof(text), "%s/event", base);
+ Collector::writeDriver(text, counter.getEvent());
+ snprintf(text, sizeof(text), "%s/count", base);
+ if (access(text, F_OK) == 0) {
+ int count = counter.getCount();
+ if (Collector::writeReadDriver(text, &count) && counter.getCount() > 0) {
+ logg->logError(__FILE__, __LINE__, "Cannot enable EBS for %s:%i with a count of %d\n", counter.getType(), counter.getEvent(), counter.getCount());
+ handleException();
+ }
+ counter.setCount(count);
+ } else if (counter.getCount() > 0) {
+ logg->logError(__FILE__, __LINE__, "Event Based Sampling is only supported with kernel versions 3.0.0 and higher with CONFIG_PERF_EVENTS=y, and CONFIG_HW_PERF_EVENTS=y\n");
+ handleException();
+ }
+}
+
+void KMod::writeCounters(mxml_node_t *root) const {
+ struct dirent *ent;
+ mxml_node_t *counter;
+
+ // counters.xml is simply a file listing of /dev/gator/events
+ DIR* dir = opendir("/dev/gator/events");
+ if (dir == NULL) {
+ logg->logError(__FILE__, __LINE__, "Cannot create counters.xml since unable to read /dev/gator/events");
+ handleException();
+ }
+
+ while ((ent = readdir(dir)) != NULL) {
+ // skip hidden files, current dir, and parent dir
+ if (ent->d_name[0] == '.')
+ continue;
+ counter = mxmlNewElement(root, "counter");
+ mxmlElementSetAttr(counter, "name", ent->d_name);
+ }
+ closedir(dir);
+}