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/*
// Copyright (c) 2010-2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/
#include "prox_malloc.h"
#include "stats_latency.h"
#include "handle_lat.h"
#include "prox_cfg.h"
#include "prox_args.h"
struct stats_latency_manager_entry {
struct task_lat *task;
uint8_t lcore_id;
uint8_t task_id;
struct lat_test lat_test;
struct lat_test tot_lat_test;
struct stats_latency stats;
struct stats_latency tot;
};
struct stats_latency_manager {
uint16_t n_latency;
struct stats_latency_manager_entry entries[0]; /* copy of stats when running update stats. */
};
static struct stats_latency_manager *slm;
void stats_latency_reset(void)
{
for (uint16_t i = 0; i < slm->n_latency; ++i)
lat_test_reset(&slm->entries[i].tot_lat_test);
}
int stats_get_n_latency(void)
{
return slm->n_latency;
}
uint32_t stats_latency_get_core_id(uint32_t i)
{
return slm->entries[i].lcore_id;
}
uint32_t stats_latency_get_task_id(uint32_t i)
{
return slm->entries[i].task_id;
}
struct stats_latency *stats_latency_get(uint32_t i)
{
return &slm->entries[i].stats;
}
struct stats_latency *stats_latency_tot_get(uint32_t i)
{
return &slm->entries[i].tot;
}
static struct stats_latency_manager_entry *stats_latency_entry_find(uint8_t lcore_id, uint8_t task_id)
{
struct stats_latency_manager_entry *entry;
for (uint16_t i = 0; i < stats_get_n_latency(); ++i) {
entry = &slm->entries[i];
if (entry->lcore_id == lcore_id && entry->task_id == task_id) {
return entry;
}
}
return NULL;
}
struct stats_latency *stats_latency_tot_find(uint32_t lcore_id, uint32_t task_id)
{
struct stats_latency_manager_entry *entry = stats_latency_entry_find(lcore_id, task_id);
if (!entry)
return NULL;
else
return &entry->tot;
}
struct stats_latency *stats_latency_find(uint32_t lcore_id, uint32_t task_id)
{
struct stats_latency_manager_entry *entry = stats_latency_entry_find(lcore_id, task_id);
if (!entry)
return NULL;
else
return &entry->stats;
}
static int task_runs_observable_latency(struct task_args *targ)
{
/* TODO: make this work with multiple ports and with
rings. Currently, only showing lat tasks which have 1 RX
port. */
return !strcmp(targ->task_init->mode_str, "lat") &&
(targ->nb_rxports == 1 || targ->nb_rxrings == 1);
}
static struct stats_latency_manager *alloc_stats_latency_manager(void)
{
const uint32_t socket_id = rte_lcore_to_socket_id(rte_lcore_id());
struct stats_latency_manager *ret;
struct lcore_cfg *lconf;
uint32_t n_latency = 0;
uint32_t lcore_id;
size_t mem_size;
lcore_id = -1;
while (prox_core_next(&lcore_id, 0) == 0) {
lconf = &lcore_cfg[lcore_id];
for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
struct task_args *targ = &lconf->targs[task_id];
if (task_runs_observable_latency(targ))
++n_latency;
}
}
mem_size = sizeof(*ret) + sizeof(ret->entries[0]) * n_latency;
ret = prox_zmalloc(mem_size, socket_id);
return ret;
}
static void stats_latency_add_task(struct lcore_cfg *lconf, struct task_args *targ)
{
struct stats_latency_manager_entry *new_entry = &slm->entries[slm->n_latency];
new_entry->task = (struct task_lat *)targ->tbase;
new_entry->lcore_id = lconf->id;
new_entry->task_id = targ->id;
slm->n_latency++;
}
void stats_latency_init(void)
{
struct lcore_cfg *lconf = NULL;
struct task_args *targ;
slm = alloc_stats_latency_manager();
while (core_targ_next(&lconf, &targ, 0) == 0) {
if (task_runs_observable_latency(targ))
stats_latency_add_task(lconf, targ);
}
}
#ifdef LATENCY_HISTOGRAM
void stats_core_lat_histogram(uint8_t lcore_id, uint8_t task_id, uint64_t **buckets)
{
struct stats_latency_manager_entry *lat_stats;
uint64_t tsc;
lat_stats = stats_latency_entry_find(lcore_id, task_id);
if (lat_stats)
*buckets = lat_stats->lat_test.buckets;
else
*buckets = NULL;
}
#endif
static void stats_latency_fetch_entry(struct stats_latency_manager_entry *entry)
{
struct stats_latency *cur = &entry->stats;
struct lat_test *lat_test_local = &entry->lat_test;
struct lat_test *lat_test_remote = task_lat_get_latency_meassurement(entry->task);
if (!lat_test_remote)
return;
if (lat_test_remote->tot_all_pkts) {
lat_test_copy(&entry->lat_test, lat_test_remote);
lat_test_reset(lat_test_remote);
lat_test_combine(&entry->tot_lat_test, &entry->lat_test);
}
task_lat_use_other_latency_meassurement(entry->task);
}
static void stats_latency_from_lat_test(struct stats_latency *dst, struct lat_test *src)
{
/* In case packets were received, but measurements were too
inaccurate */
if (src->tot_pkts) {
dst->max = lat_test_get_max(src);
dst->min = lat_test_get_min(src);
dst->avg = lat_test_get_avg(src);
dst->stddev = lat_test_get_stddev(src);
}
dst->accuracy_limit = lat_test_get_accuracy_limit(src);
dst->tot_packets = src->tot_pkts;
dst->tot_all_packets = src->tot_all_pkts;
dst->lost_packets = src->lost_packets;
}
static void stats_latency_update_entry(struct stats_latency_manager_entry *entry)
{
if (!entry->lat_test.tot_all_pkts)
return;
stats_latency_from_lat_test(&entry->stats, &entry->lat_test);
stats_latency_from_lat_test(&entry->tot, &entry->tot_lat_test);
}
void stats_latency_update(void)
{
for (uint16_t i = 0; i < slm->n_latency; ++i)
stats_latency_fetch_entry(&slm->entries[i]);
for (uint16_t i = 0; i < slm->n_latency; ++i)
stats_latency_update_entry(&slm->entries[i]);
}
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