5dce9fcdb2
The patch simplifies DPDK applications analysis for developers which use Intel® VTune Amplifier. The empty cycles are such iterations that yielded no RX packets. As far as DPDK is running in poll mode, wasting cycles is equal to wasting CPU time. Tracing such iterations can identify that device is underutilized. Tracing empty cycles becomes even more critical if a system uses a lot of Ethernet ports. The patch gives possibility to analyze empty cycles without changing application code. All needs to be done is just to reconfigure and rebuild the DPDK itself with CONFIG_RTE_ETHDEV_PROFILE_ITT_WASTED_RX_ITERATIONS enbled. The important thing here is that this does not affect DPDK code. The profiling code is not being compiled if user does not specify config flag. The patch provides common way to inject RX queues profiling and VTune specific implementation. Signed-off-by: Ilia Kurakin <ilia.kurakin@intel.com> Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
57 lines
2.2 KiB
C
57 lines
2.2 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2017 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.
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*/
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#ifndef _RTE_ETHDEV_PROFILE_H_
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#define _RTE_ETHDEV_PROFILE_H_
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#include "rte_ethdev.h"
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/**
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* Initialization of profiling RX queues for the Ethernet device.
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* Implementation of this function depends on chosen profiling method,
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* defined in configs.
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*
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* @param port_id
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* The port identifier of the Ethernet device.
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* @param dev
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* Pointer to struct rte_eth_dev corresponding to given port_id.
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*
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* @return
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* - On success, zero.
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* - On failure, a negative value.
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*/
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int
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__rte_eth_profile_rx_init(uint8_t port_id, struct rte_eth_dev *dev);
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#endif
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