121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 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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#include <inttypes.h>
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#include <stdio.h>
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#include <math.h>
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#include <rte_common.h>
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#include <rte_log.h>
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#include <rte_cycles.h>
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#include "rte_meter.h"
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#ifndef RTE_METER_TB_PERIOD_MIN
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#define RTE_METER_TB_PERIOD_MIN 100
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#endif
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static void
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rte_meter_get_tb_params(uint64_t hz, uint64_t rate, uint64_t *tb_period, uint64_t *tb_bytes_per_period)
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{
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double period = ((double) hz) / ((double) rate);
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if (period >= RTE_METER_TB_PERIOD_MIN) {
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*tb_bytes_per_period = 1;
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*tb_period = (uint64_t) period;
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} else {
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*tb_bytes_per_period = (uint64_t) ceil(RTE_METER_TB_PERIOD_MIN / period);
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*tb_period = (hz * (*tb_bytes_per_period)) / rate;
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}
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}
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int
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rte_meter_srtcm_config(struct rte_meter_srtcm *m, struct rte_meter_srtcm_params *params)
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{
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uint64_t hz;
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/* Check input parameters */
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if ((m == NULL) || (params == NULL)) {
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return -1;
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}
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if ((params->cir == 0) || ((params->cbs == 0) && (params->ebs == 0))) {
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return -2;
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}
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/* Initialize srTCM run-time structure */
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hz = rte_get_tsc_hz();
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m->time = rte_get_tsc_cycles();
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m->tc = m->cbs = params->cbs;
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m->te = m->ebs = params->ebs;
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rte_meter_get_tb_params(hz, params->cir, &m->cir_period, &m->cir_bytes_per_period);
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RTE_LOG(INFO, METER, "Low level srTCM config: \n"
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"\tCIR period = %" PRIu64 ", CIR bytes per period = %" PRIu64 "\n",
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m->cir_period, m->cir_bytes_per_period);
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return 0;
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}
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int
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rte_meter_trtcm_config(struct rte_meter_trtcm *m, struct rte_meter_trtcm_params *params)
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{
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uint64_t hz;
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/* Check input parameters */
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if ((m == NULL) || (params == NULL)) {
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return -1;
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}
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if ((params->cir == 0) || (params->pir == 0) || (params->pir < params->cir) ||
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(params->cbs == 0) || (params->pbs == 0)) {
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return -2;
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}
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/* Initialize trTCM run-time structure */
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hz = rte_get_tsc_hz();
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m->time_tc = m->time_tp = rte_get_tsc_cycles();
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m->tc = m->cbs = params->cbs;
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m->tp = m->pbs = params->pbs;
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rte_meter_get_tb_params(hz, params->cir, &m->cir_period, &m->cir_bytes_per_period);
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rte_meter_get_tb_params(hz, params->pir, &m->pir_period, &m->pir_bytes_per_period);
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RTE_LOG(INFO, METER, "Low level trTCM config: \n"
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"\tCIR period = %" PRIu64 ", CIR bytes per period = %" PRIu64 "\n"
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"\tPIR period = %" PRIu64 ", PIR bytes per period = %" PRIu64 "\n",
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m->cir_period, m->cir_bytes_per_period,
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m->pir_period, m->pir_bytes_per_period);
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return 0;
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}
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