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/*
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* BSD LICENSE
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*
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* Copyright(c) 2018 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.O
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*
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*/
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/**
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* @brief Internal header file for resctrl minitoring functions
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*/
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#ifndef __PQOS_RESCTRL_MON_H__
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#define __PQOS_RESCTRL_MON_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Initializes resctrl structures used for OS monitoring interface
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*
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* @param cpu cpu topology structure
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* @param cap capabilities structure
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*
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* @return Operational status
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* @retval PQOS_RETVAL_OK success
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*/
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int resctrl_mon_init(const struct pqos_cpuinfo *cpu,
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const struct pqos_cap *cap);
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/**
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* @brief Shuts down monitoring sub-module for resctrl monitoring
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*
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* @return Operation status
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* @retval PQOS_RETVAL_OK success
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*/
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int resctrl_mon_fini(void);
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/**
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* @brief This function starts resctrl event counters
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*
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* @param group monitoring structure
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*
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* @return Operation status
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* @retval PQOS_RETVAL_OK on success
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*/
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int resctrl_mon_start(struct pqos_mon_data *group);
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/**
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* @brief Function to stop resctrl event counters
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*
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* @param group monitoring structure
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*
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* @return Operation status
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* @retval PQOS_RETVAL_OK on success
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*/
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int resctrl_mon_stop(struct pqos_mon_data *group);
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/**
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* @brief This function polls all resctrl counters
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*
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* Reads counters for all events and stores values
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*
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* @param group monitoring structure
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*
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* @return Operation status
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* @retval PQOS_RETVAL_OK on success
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* @retval PQOS_RETVAL_ERROR if error occurs
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*/
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int resctrl_mon_poll(struct pqos_mon_data *group,
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const enum pqos_mon_event event);
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/**
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* @brief Reset of resctrl monitoring
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*
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* @return Operations status
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* @return PQOS_RETVAL_RESOURCE when resctrl monitoring is not supported
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* @retval PQOS_RETVAL_OK on success
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*/
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int resctrl_mon_reset(void);
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/**
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* @brief Check if event is supported by resctrl
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*
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* @param event PQoS event to check
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*
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* @retval 0 if not supported
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*/
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int resctrl_mon_is_event_supported(const enum pqos_mon_event event);
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/**
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* @brief Read association of \a lcore with monitoring group
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*
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* @param [in] lcore CPU logical core id
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* @param [out] name name of monitoring group
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* @param [in] name_size length of \a name buffer
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*
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* @return Operations status
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* @retval PQOS_RETVAL_RESOURCE when \a lcore is not assigned to monitoring
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* group
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* @retval PQOS_RETVAL_OK on success
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*/
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int resctrl_mon_assoc_get(const unsigned lcore,
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char *name,
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const unsigned name_size);
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/**
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* @brief Set association of \a lcore to monitoring group
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*
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* @param [in] lcore CPU logical core id
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* @param [in] name name of monitoring group
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*
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* @return Operations status
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* @retval PQOS_RETVAL_OK on success
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*/
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int resctrl_mon_assoc_set(const unsigned lcore, const char *name);
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/**
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* @brief Read association of \a task with monitoring group
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*
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* @param [in] task task id to find association
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* @param [out] name name of monitoring group
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* @param [in] name_size length of \a name buffer
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*
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* @return Operations status
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* @retval PQOS_RETVAL_RESOURCE when \a task is not assigned to monitoring
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* group or monitoring is not supported
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* @retval PQOS_RETVAL_OK on success
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*/
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int resctrl_mon_assoc_get_pid(const pid_t task,
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char *name,
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const unsigned name_size);
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/**
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* @brief Set association of \a task to monitoring group
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*
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* @param [in] task task id to be associated
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* @param [in] name name of monitoring group
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*
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* @return Operations status
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* @retval PQOS_RETVAL_OK on success
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*/
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int resctrl_mon_assoc_set_pid(const pid_t task, const char *name);
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/**
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* @brief Check if resctrl monitoring is active
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*
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* @param monitoring_status 1 if resctrl monitoring is active, 0 otherwise
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*
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* @return Operational status
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* @retval PQOS_RETVAL_OK on success
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*/
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int resctrl_mon_active(unsigned *monitoring_status);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __PQOS_RESCTRL_H__ */
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