/*
- * Copyright (c) 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* for traditional coverage instrumentation with e.g. "gcov", but it is still
* a useful debugging tool. */
+#include "ovs-thread.h"
#include "vlog.h"
+#include "compiler.h"
+
+/* Makes coverage_run run every 5000 ms (5 seconds).
+ * If this value is redefined, the new value must
+ * divide 60000 (1 minute). */
+#define COVERAGE_RUN_INTERVAL 5000
+BUILD_ASSERT_DECL(60000 % COVERAGE_RUN_INTERVAL == 0);
+
+#define COVERAGE_CLEAR_INTERVAL 1000
+BUILD_ASSERT_DECL(COVERAGE_RUN_INTERVAL % COVERAGE_CLEAR_INTERVAL == 0);
+
+/* Defines the moving average array length. */
+#define MIN_AVG_LEN (60000/COVERAGE_RUN_INTERVAL)
+#define HR_AVG_LEN 60
/* A coverage counter. */
struct coverage_counter {
- const char *name; /* Textual name. */
- unsigned int count; /* Count within the current epoch. */
- unsigned long long int total; /* Total count over all epochs. */
+ const char *const name; /* Textual name. */
+ unsigned int (*const count)(void); /* Gets, zeros this thread's count. */
+ unsigned long long int total; /* Total count. */
+ unsigned long long int last_total;
+ /* The moving average arrays. */
+ unsigned int min[MIN_AVG_LEN];
+ unsigned int hr[HR_AVG_LEN];
};
+void coverage_counter_register(struct coverage_counter*);
+
/* Defines COUNTER. There must be exactly one such definition at file scope
* within a program. */
-#if USE_LINKER_SECTIONS
#define COVERAGE_DEFINE(COUNTER) \
- COVERAGE_DEFINE__(COUNTER); \
- extern struct coverage_counter *counter_ptr_##COUNTER; \
- struct coverage_counter *counter_ptr_##COUNTER \
- __attribute__((section("coverage"))) = &counter_##COUNTER
-#else
-#define COVERAGE_DEFINE(MODULE) \
- extern struct coverage_counter counter_##MODULE
-#endif
+ DEFINE_STATIC_PER_THREAD_DATA(unsigned int, \
+ counter_##COUNTER, 0); \
+ static unsigned int COUNTER##_count(void) \
+ { \
+ unsigned int *countp = counter_##COUNTER##_get(); \
+ unsigned int count = *countp; \
+ *countp = 0; \
+ return count; \
+ } \
+ static inline void COUNTER##_add(unsigned int n) \
+ { \
+ *counter_##COUNTER##_get() += n; \
+ } \
+ extern struct coverage_counter counter_##COUNTER; \
+ struct coverage_counter counter_##COUNTER \
+ = { #COUNTER, COUNTER##_count, 0, 0, {0}, {0} }; \
+ OVS_CONSTRUCTOR(COUNTER##_init) { \
+ coverage_counter_register(&counter_##COUNTER); \
+ }
/* Adds 1 to COUNTER. */
-#define COVERAGE_INC(COUNTER) counter_##COUNTER.count++;
+#define COVERAGE_INC(COUNTER) COVERAGE_ADD(COUNTER, 1)
/* Adds AMOUNT to COUNTER. */
-#define COVERAGE_ADD(COUNTER, AMOUNT) counter_##COUNTER.count += (AMOUNT);
+#define COVERAGE_ADD(COUNTER, AMOUNT) COUNTER##_add(AMOUNT)
void coverage_init(void);
-void coverage_log(enum vlog_level, bool suppress_dups);
+void coverage_log(void);
void coverage_clear(void);
+void coverage_run(void);
/* Implementation detail. */
#define COVERAGE_DEFINE__(COUNTER) \
- extern struct coverage_counter counter_##COUNTER; \
- struct coverage_counter counter_##COUNTER = { #COUNTER, 0, 0 }
#endif /* coverage.h */