Imported upstream release 16.04

* gbp import-orig ../dpdk-16.04.tar.xz

Change-Id: Iac2196db782ba322f6974d8a752acc34ce5024c3
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

4 files changed, 708 insertions, 0 deletions

diff --git a/lib/librte_jobstats/Makefile b/lib/librte_jobstats/Makefile
new file mode 100644
index 00000000..136a448e
--- /dev/null
+++ b/lib/librte_jobstats/Makefile
@@ -0,0 +1,53 @@
+#   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.
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# library name
+LIB = librte_jobstats.a
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR)
+
+EXPORT_MAP := rte_jobstats_version.map
+
+LIBABIVER := 1
+
+# all source are stored in SRCS-y
+SRCS-$(CONFIG_RTE_LIBRTE_JOBSTATS) := rte_jobstats.c
+
+# install this header file
+SYMLINK-$(CONFIG_RTE_LIBRTE_JOBSTATS)-include := rte_jobstats.h
+
+# this lib needs eal
+DEPDIRS-$(CONFIG_RTE_LIBRTE_JOBSTATS) += lib/librte_eal
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_jobstats/rte_jobstats.c b/lib/librte_jobstats/rte_jobstats.c
new file mode 100644
index 00000000..2b42050c
--- /dev/null
+++ b/lib/librte_jobstats/rte_jobstats.c
@@ -0,0 +1,293 @@
+/*-
+ *   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.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <rte_errno.h>
+#include <rte_common.h>
+#include <rte_eal.h>
+#include <rte_log.h>
+#include <rte_cycles.h>
+#include <rte_branch_prediction.h>
+
+#include "rte_jobstats.h"
+
+#define ADD_TIME_MIN_MAX(obj, type, value) do {      \
+	typeof(value) tmp = (value);                     \
+	(obj)->type ## _time += tmp;                     \
+	if (tmp < (obj)->min_ ## type ## _time)          \
+		(obj)->min_ ## type ## _time = tmp;          \
+	if (tmp > (obj)->max_ ## type ## _time)          \
+		(obj)->max_ ## type ## _time = tmp;          \
+} while (0)
+
+#define RESET_TIME_MIN_MAX(obj, type) do {           \
+	(obj)->type ## _time = 0;                        \
+	(obj)->min_ ## type ## _time = UINT64_MAX;       \
+	(obj)->max_ ## type ## _time = 0;                \
+} while (0)
+
+static inline uint64_t
+get_time(void)
+{
+	rte_rmb();
+	return rte_get_timer_cycles();
+}
+
+/* Those are steps used to adjust job period.
+ * Experiments show that for forwarding apps the up step must be less than down
+ * step to achieve optimal performance.
+ */
+#define JOB_UPDATE_STEP_UP    1
+#define JOB_UPDATE_STEP_DOWN  4
+
+/*
+ * Default update function that implements simple period adjustment.
+ */
+static void
+default_update_function(struct rte_jobstats *job, int64_t result)
+{
+	int64_t err = job->target - result;
+
+	/* Job is happy. Nothing to do */
+	if (err == 0)
+		return;
+
+	if (err > 0) {
+		if (job->period + JOB_UPDATE_STEP_UP < job->max_period)
+			job->period += JOB_UPDATE_STEP_UP;
+	} else {
+		if (job->min_period + JOB_UPDATE_STEP_DOWN < job->period)
+			job->period -= JOB_UPDATE_STEP_DOWN;
+	}
+}
+
+int
+rte_jobstats_context_init(struct rte_jobstats_context *ctx)
+{
+	if (ctx == NULL)
+		return -EINVAL;
+
+	/* Init only needed parameters. Zero out everything else. */
+	memset(ctx, 0, sizeof(struct rte_jobstats_context));
+
+	rte_jobstats_context_reset(ctx);
+
+	return 0;
+}
+
+void
+rte_jobstats_context_start(struct rte_jobstats_context *ctx)
+{
+	uint64_t now;
+
+	ctx->loop_executed_jobs = 0;
+
+	now = get_time();
+	ADD_TIME_MIN_MAX(ctx, management, now - ctx->state_time);
+	ctx->state_time = now;
+}
+
+void
+rte_jobstats_context_finish(struct rte_jobstats_context *ctx)
+{
+	uint64_t now;
+
+	if (likely(ctx->loop_executed_jobs))
+		ctx->loop_cnt++;
+
+	now = get_time();
+	ADD_TIME_MIN_MAX(ctx, management, now - ctx->state_time);
+	ctx->state_time = now;
+}
+
+void
+rte_jobstats_context_reset(struct rte_jobstats_context *ctx)
+{
+	RESET_TIME_MIN_MAX(ctx, exec);
+	RESET_TIME_MIN_MAX(ctx, management);
+	ctx->start_time = get_time();
+	ctx->state_time = ctx->start_time;
+	ctx->job_exec_cnt = 0;
+	ctx->loop_cnt = 0;
+}
+
+void
+rte_jobstats_set_target(struct rte_jobstats *job, int64_t target)
+{
+	job->target = target;
+}
+
+int
+rte_jobstats_start(struct rte_jobstats_context *ctx, struct rte_jobstats *job)
+{
+	uint64_t now;
+
+	/* Some sanity check. */
+	if (unlikely(ctx == NULL || job == NULL || job->context != NULL))
+		return -EINVAL;
+
+	/* Link job with context object. */
+	job->context = ctx;
+
+	now = get_time();
+	ADD_TIME_MIN_MAX(ctx, management, now - ctx->state_time);
+	ctx->state_time = now;
+
+	return 0;
+}
+
+int
+rte_jobstats_abort(struct rte_jobstats *job)
+{
+	struct rte_jobstats_context *ctx;
+	uint64_t now, exec_time;
+
+	/* Some sanity check. */
+	if (unlikely(job == NULL || job->context == NULL))
+		return -EINVAL;
+
+	ctx = job->context;
+	now = get_time();
+	exec_time = now - ctx->state_time;
+	ADD_TIME_MIN_MAX(ctx, management, exec_time);
+	ctx->state_time = now;
+	job->context = NULL;
+
+	return 0;
+}
+
+int
+rte_jobstats_finish(struct rte_jobstats *job, int64_t job_value)
+{
+	struct rte_jobstats_context *ctx;
+	uint64_t now, exec_time;
+	int need_update;
+
+	/* Some sanity check. */
+	if (unlikely(job == NULL || job->context == NULL))
+		return -EINVAL;
+
+	need_update = job->target != job_value;
+	/* Adjust period only if job is unhappy of its current period. */
+	if (need_update)
+		(*job->update_period_cb)(job, job_value);
+
+	ctx = job->context;
+
+	/* Update execution time is considered as runtime so get time after it is
+	 * executed. */
+	now = get_time();
+	exec_time = now - ctx->state_time;
+	ADD_TIME_MIN_MAX(job, exec, exec_time);
+	ADD_TIME_MIN_MAX(ctx, exec, exec_time);
+
+	ctx->state_time = now;
+
+	ctx->loop_executed_jobs++;
+	ctx->job_exec_cnt++;
+
+	job->exec_cnt++;
+	job->context = NULL;
+
+	return need_update;
+}
+
+void
+rte_jobstats_set_period(struct rte_jobstats *job, uint64_t period,
+		uint8_t saturate)
+{
+	if (saturate != 0) {
+		if (period < job->min_period)
+			period = job->min_period;
+		else if (period > job->max_period)
+			period = job->max_period;
+	}
+
+	job->period = period;
+}
+
+void
+rte_jobstats_set_min(struct rte_jobstats *job, uint64_t period)
+{
+	job->min_period = period;
+	if (job->period < period)
+		job->period = period;
+}
+
+void
+rte_jobstats_set_max(struct rte_jobstats *job, uint64_t period)
+{
+	job->max_period = period;
+	if (job->period > period)
+		job->period = period;
+}
+
+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)
+{
+	if (job == NULL)
+		return -EINVAL;
+
+	job->period = initial_period;
+	job->min_period = min_period;
+	job->max_period = max_period;
+	job->target = target;
+	job->update_period_cb = &default_update_function;
+	rte_jobstats_reset(job);
+	snprintf(job->name, RTE_DIM(job->name), "%s", name == NULL ? "" : name);
+	job->context = NULL;
+
+	return 0;
+}
+
+void
+rte_jobstats_set_update_period_function(struct rte_jobstats *job,
+		rte_job_update_period_cb_t update_period_cb)
+{
+	if (update_period_cb == NULL)
+		update_period_cb = default_update_function;
+
+	job->update_period_cb = update_period_cb;
+}
+
+void
+rte_jobstats_reset(struct rte_jobstats *job)
+{
+	RESET_TIME_MIN_MAX(job, exec);
+	job->exec_cnt = 0;
+}
diff --git a/lib/librte_jobstats/rte_jobstats.h b/lib/librte_jobstats/rte_jobstats.h
new file mode 100644
index 00000000..c2b285f8
--- /dev/null
+++ b/lib/librte_jobstats/rte_jobstats.h
@@ -0,0 +1,336 @@
+/*-
+ *   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_ */
diff --git a/lib/librte_jobstats/rte_jobstats_version.map b/lib/librte_jobstats/rte_jobstats_version.map
new file mode 100644
index 00000000..f8944143
--- /dev/null
+++ b/lib/librte_jobstats/rte_jobstats_version.map
@@ -0,0 +1,26 @@
+DPDK_2.0 {
+	global:
+
+	rte_jobstats_context_finish;
+	rte_jobstats_context_init;
+	rte_jobstats_context_reset;
+	rte_jobstats_context_start;
+	rte_jobstats_finish;
+	rte_jobstats_init;
+	rte_jobstats_reset;
+	rte_jobstats_set_max;
+	rte_jobstats_set_min;
+	rte_jobstats_set_period;
+	rte_jobstats_set_target;
+	rte_jobstats_set_update_period_function;
+	rte_jobstats_start;
+
+	local: *;
+};
+
+DPDK_16.04 {
+	global:
+
+	rte_jobstats_abort;
+
+} DPDK_2.0;