--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef JOBSTATS_H_
+#define JOBSTATS_H_
+
+#include <stdint.h>
+
+#include <rte_memory.h>
+#include <rte_memcpy.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RTE_JOBSTATS_NAMESIZE 32
+
+/* Forward declarations. */
+struct rte_jobstats_context;
+struct rte_jobstats;
+
+/**
+ * This function should calculate new period and set it using
+ * rte_jobstats_set_period() function. Time spent in this function will be
+ * added to job's runtime.
+ *
+ * @param job
+ * The job data structure handler.
+ * @param job_result
+ * Result of calling job callback.
+ */
+typedef void (*rte_job_update_period_cb_t)(struct rte_jobstats *job,
+ int64_t job_result);
+
+struct rte_jobstats {
+ uint64_t period;
+ /**< Estimated period of execution. */
+
+ uint64_t min_period;
+ /**< Minimum period. */
+
+ uint64_t max_period;
+ /**< Maximum period. */
+
+ int64_t target;
+ /**< Desired value for this job. */
+
+ rte_job_update_period_cb_t update_period_cb;
+ /**< Period update callback. */
+
+ uint64_t exec_time;
+ /**< Total time (sum) that this job was executing. */
+
+ uint64_t min_exec_time;
+ /**< Minimum execute time. */
+
+ uint64_t max_exec_time;
+ /**< Minimum execute time. */
+
+ uint64_t exec_cnt;
+ /**< Execute count. */
+
+ char name[RTE_JOBSTATS_NAMESIZE];
+ /**< Name of this job */
+
+ struct rte_jobstats_context *context;
+ /**< Job stats context object that is executing this job. */
+} __rte_cache_aligned;
+
+struct rte_jobstats_context {
+ /** Viariable holding time at different points:
+ * -# loop start time if loop was started but no job executed yet.
+ * -# job start time if job is currently executing.
+ * -# job finish time if job finished its execution.
+ * -# loop finish time if loop finished its execution. */
+ uint64_t state_time;
+
+ uint64_t loop_executed_jobs;
+ /**< Count of executed jobs in this loop. */
+
+ /* Statistics start. */
+
+ uint64_t exec_time;
+ /**< Total time taken to execute jobs, not including management time. */
+
+ uint64_t min_exec_time;
+ /**< Minimum loop execute time. */
+
+ uint64_t max_exec_time;
+ /**< Minimum loop execute time. */
+
+ /**
+ * Sum of time that is not the execute time (ex: from job finish to next
+ * job start).
+ *
+ * This time might be considered as overhead of library + job scheduling.
+ */
+ uint64_t management_time;
+
+ uint64_t min_management_time;
+ /**< Minimum management time */
+
+ uint64_t max_management_time;
+ /**< Maximum management time */
+
+ uint64_t start_time;
+ /**< Time since last reset stats. */
+
+ uint64_t job_exec_cnt;
+ /**< Total count of executed jobs. */
+
+ uint64_t loop_cnt;
+ /**< Total count of executed loops with at least one executed job. */
+} __rte_cache_aligned;
+
+/**
+ * Initialize given context object with default values.
+ *
+ * @param ctx
+ * Job stats context object to initialize.
+ *
+ * @return
+ * 0 on success
+ * -EINVAL if *ctx* is NULL
+ */
+int
+rte_jobstats_context_init(struct rte_jobstats_context *ctx);
+
+/**
+ * Mark that new set of jobs start executing.
+ *
+ * @param ctx
+ * Job stats context object.
+ */
+void
+rte_jobstats_context_start(struct rte_jobstats_context *ctx);
+
+/**
+ * Mark that there is no more jobs ready to execute in this turn. Calculate
+ * stats for this loop turn.
+ *
+ * @param ctx
+ * Job stats context.
+ */
+void
+rte_jobstats_context_finish(struct rte_jobstats_context *ctx);
+
+/**
+ * Function resets job context statistics.
+ *
+ * @param ctx
+ * Job stats context which statistics will be reset.
+ */
+void
+rte_jobstats_context_reset(struct rte_jobstats_context *ctx);
+
+/**
+ * Initialize given job stats object.
+ *
+ * @param job
+ * Job object.
+ * @param name
+ * Optional job name.
+ * @param min_period
+ * Minimum period that this job can accept.
+ * @param max_period
+ * Maximum period that this job can accept.
+ * @param initial_period
+ * Initial period. It will be checked against *min_period* and *max_period*.
+ * @param target
+ * Target value that this job try to achieve.
+ *
+ * @return
+ * 0 on success
+ * -EINVAL if *job* is NULL
+ */
+int
+rte_jobstats_init(struct rte_jobstats *job, const char *name,
+ uint64_t min_period, uint64_t max_period, uint64_t initial_period,
+ int64_t target);
+
+/**
+ * Set job desired target value. Difference between target and job value
+ * value must be used to properly adjust job execute period value.
+ *
+ * @param job
+ * The job object.
+ * @param target
+ * New target.
+ */
+void
+rte_jobstats_set_target(struct rte_jobstats *job, int64_t target);
+
+/**
+ * Mark that *job* is starting of its execution in context of *ctx* object.
+ *
+ * @param ctx
+ * Job stats context.
+ * @param job
+ * Job object.
+ * @return
+ * 0 on success
+ * -EINVAL if *ctx* or *job* is NULL or *job* is executing in another context
+ * context already,
+ */
+int
+rte_jobstats_start(struct rte_jobstats_context *ctx, struct rte_jobstats *job);
+
+/**
+ * Mark that *job* finished its execution, but time of this work will be skipped
+ * and added to management time.
+ *
+ * @param job
+ * Job object.
+ *
+ * @return
+ * 0 on success
+ * -EINVAL if job is NULL or job was not started (it have no context).
+ */
+int
+rte_jobstats_abort(struct rte_jobstats *job);
+
+/**
+ * Mark that *job* finished its execution. Context in which it was executing
+ * will receive stat update. After this function call *job* object is ready to
+ * be executed in other context.
+ *
+ * @param job
+ * Job object.
+ * @param job_value
+ * Job value. Job should pass in this parameter a value that it try to optimize
+ * for example the number of packets it processed.
+ *
+ * @return
+ * 0 if job's period was not updated (job target equals *job_value*)
+ * 1 if job's period was updated
+ * -EINVAL if job is NULL or job was not started (it have no context).
+ */
+int
+rte_jobstats_finish(struct rte_jobstats *job, int64_t job_value);
+
+/**
+ * Set execute period of given job.
+ *
+ * @param job
+ * The job object.
+ * @param period
+ * New period value.
+ * @param saturate
+ * If zero, skip period saturation to min, max range.
+ */
+void
+rte_jobstats_set_period(struct rte_jobstats *job, uint64_t period,
+ uint8_t saturate);
+/**
+ * Set minimum execute period of given job. Current period will be checked
+ * against new minimum value.
+ *
+ * @param job
+ * The job object.
+ * @param period
+ * New minimum period value.
+ */
+void
+rte_jobstats_set_min(struct rte_jobstats *job, uint64_t period);
+/**
+ * Set maximum execute period of given job. Current period will be checked
+ * against new maximum value.
+ *
+ * @param job
+ * The job object.
+ * @param period
+ * New maximum period value.
+ */
+void
+rte_jobstats_set_max(struct rte_jobstats *job, uint64_t period);
+
+/**
+ * Set update period callback that is invoked after job finish.
+ *
+ * If application wants to do more sophisticated calculations than default
+ * it can provide this handler.
+ *
+ * @param job
+ * Job object.
+ * @param update_pedriod_cb
+ * Callback to set. If NULL restore default update function.
+ */
+void
+rte_jobstats_set_update_period_function(struct rte_jobstats *job,
+ rte_job_update_period_cb_t update_period_cb);
+
+/**
+ * Function resets job statistics.
+ *
+ * @param job
+ * Job which statistics will be reset.
+ */
+void
+rte_jobstats_reset(struct rte_jobstats *job);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* JOBSTATS_H_ */
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