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1443ff0f5e
zephyr/subsys/net/ip/net_tc.c
Jukka Rissanen 1443ff0f5e net: stats: Make statistics collection per network interface 
Instead of one global statistics, collect statistics information
separately for each network interface. This per interface statistics
collection is optional but turned on by default. It can be turned
off if needed, in which case only global statistics are collected.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
2018-04-10 13:29:39 +03:00

393 lines
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/*
* Copyright (c) 2018 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#if defined(CONFIG_NET_DEBUG_TC)
#define SYS_LOG_DOMAIN "net/tc"
#define NET_LOG_ENABLED 1
#endif
#include <zephyr.h>
#include <string.h>
#include <net/net_core.h>
#include <net/net_pkt.h>
#include <net/net_stats.h>
#include "net_private.h"
#include "net_stats.h"
/* Stacks for TX work queue */
NET_STACK_ARRAY_DEFINE(TX, tx_stack,
CONFIG_NET_TX_STACK_SIZE,
CONFIG_NET_TX_STACK_SIZE,
NET_TC_TX_COUNT);
/* Stacks for RX work queue */
NET_STACK_ARRAY_DEFINE(RX, rx_stack,
CONFIG_NET_RX_STACK_SIZE,
CONFIG_NET_RX_STACK_SIZE + CONFIG_NET_RX_STACK_RPL,
NET_TC_RX_COUNT);
static struct net_traffic_class tx_classes[NET_TC_TX_COUNT];
static struct net_traffic_class rx_classes[NET_TC_RX_COUNT];
void net_tc_submit_to_tx_queue(u8_t tc, struct net_pkt *pkt)
{
k_work_submit_to_queue(&tx_classes[tc].work_q, net_pkt_work(pkt));
}
void net_tc_submit_to_rx_queue(u8_t tc, struct net_pkt *pkt)
{
k_work_submit_to_queue(&rx_classes[tc].work_q, net_pkt_work(pkt));
}
int net_tx_priority2tc(enum net_priority prio)
{
/* FIXME: Initial implementation just maps the priority to certain
* traffic class to certain queue. This needs to be made more generic.
*
* Use the example priority -> traffic class mapper found in
* IEEE 802.1Q chapter 8.6.6 table 8.4 and chapter 34.5 table 34-1
*
* Priority Acronym Traffic types
* 0 (lowest) BK Background
* 1 (default) BE Best effort
* 2 EE Excellent effort
* 3 (highest) CA Critical applications
* 4 VI Video, < 100 ms latency and jitter
* 5 VO Voice, < 10 ms latency and jitter
* 6 IC Internetwork control
* 7 NC Network control
*/
/* Priority is the index to this array */
static const u8_t tc[] = {
#if NET_TC_TX_COUNT == 1
0, 0, 0, 0, 0, 0, 0, 0
#endif
#if NET_TC_TX_COUNT == 2
0, 0, 1, 1, 0, 0, 0, 0
#endif
#if NET_TC_TX_COUNT == 3
0, 0, 1, 2, 0, 0, 0, 0
#endif
#if NET_TC_TX_COUNT == 4
0, 0, 2, 3, 1, 1, 1, 1
#endif
#if NET_TC_TX_COUNT == 5
0, 0, 3, 4, 1, 1, 2, 2
#endif
#if NET_TC_TX_COUNT == 6
0, 0, 4, 5, 1, 1, 2, 3
#endif
#if NET_TC_TX_COUNT == 7
0, 0, 5, 6, 1, 2, 3, 4
#endif
#if NET_TC_TX_COUNT == 8
0, 1, 6, 7, 2, 3, 4, 5
#endif
};
if (prio >= ARRAY_SIZE(tc)) {
/* Use default value suggested in 802.1Q */
prio = NET_PRIORITY_BE;
}
return tc[prio];
}
int net_rx_priority2tc(enum net_priority prio)
{
/* FIXME: Initial implementation just maps the priority to certain
* traffic class to certain queue. This needs to be made more generic.
*
* Use the example priority -> traffic class mapper found in
* IEEE 802.1Q chapter 8.6.6 table 8.4 and chapter 34.5 table 34-1
*
* Priority Acronym Traffic types
* 0 (lowest) BK Background
* 1 (default) BE Best effort
* 2 EE Excellent effort
* 3 (highest) CA Critical applications
* 4 VI Video, < 100 ms latency and jitter
* 5 VO Voice, < 10 ms latency and jitter
* 6 IC Internetwork control
* 7 NC Network control
*/
/* Priority is the index to this array */
static const u8_t tc[] = {
#if NET_TC_RX_COUNT == 1
0, 0, 0, 0, 0, 0, 0, 0
#endif
#if NET_TC_RX_COUNT == 2
0, 0, 1, 1, 0, 0, 0, 0
#endif
#if NET_TC_RX_COUNT == 3
0, 0, 1, 2, 0, 0, 0, 0
#endif
#if NET_TC_RX_COUNT == 4
0, 0, 2, 3, 1, 1, 1, 1
#endif
#if NET_TC_RX_COUNT == 5
0, 0, 3, 4, 1, 1, 2, 2
#endif
#if NET_TC_RX_COUNT == 6
0, 0, 4, 5, 1, 1, 2, 3
#endif
#if NET_TC_RX_COUNT == 7
0, 0, 5, 6, 1, 2, 3, 4
#endif
#if NET_TC_RX_COUNT == 8
0, 1, 6, 7, 2, 3, 4, 5
#endif
};
if (prio >= ARRAY_SIZE(tc)) {
/* Use default value suggested in 802.1Q */
prio = NET_PRIORITY_BE;
}
return tc[prio];
}
/* Convert traffic class to thread priority */
static u8_t tx_tc2thread(u8_t tc)
{
/* Initial implementation just maps the traffic class to certain queue.
* If there are less queues than classes, then map them into
* some specific queue. In order to make this work same way as before,
* the thread priority 7 is used to map the default traffic class so
* this system works same way as before when TX thread default priority
* was 7.
*
* Lower value in this table means higher thread priority. The
* value is used as a parameter to K_PRIO_COOP() which converts it
* to actual thread priority.
*
* Higher traffic class value means higher priority queue. This means
* that thread_priorities[7] value should contain the highest priority
* for the TX queue handling thread.
*/
static const u8_t thread_priorities[] = {
#if NET_TC_TX_COUNT == 1
7
#endif
#if NET_TC_TX_COUNT == 2
8, 7
#endif
#if NET_TC_TX_COUNT == 3
8, 7, 6
#endif
#if NET_TC_TX_COUNT == 4
8, 7, 6, 5
#endif
#if NET_TC_TX_COUNT == 5
8, 7, 6, 5, 4
#endif
#if NET_TC_TX_COUNT == 6
8, 7, 6, 5, 4, 3
#endif
#if NET_TC_TX_COUNT == 7
8, 7, 6, 5, 4, 3, 2
#endif
#if NET_TC_TX_COUNT == 8
8, 7, 6, 5, 4, 3, 2, 1
#endif
};
BUILD_ASSERT_MSG(NET_TC_TX_COUNT <= CONFIG_NUM_COOP_PRIORITIES,
"Too many traffic classes");
NET_ASSERT(tc < ARRAY_SIZE(thread_priorities));
return thread_priorities[tc];
}
/* Convert traffic class to thread priority */
static u8_t rx_tc2thread(u8_t tc)
{
/* Initial implementation just maps the traffic class to certain queue.
* If there are less queues than classes, then map them into
* some specific queue. In order to make this work same way as before,
* the thread priority 7 is used to map the default traffic class so
* this system works same way as before when RX thread default priority
* was 7.
*
* Lower value in this table means higher thread priority. The
* value is used as a parameter to K_PRIO_COOP() which converts it
* to actual thread priority.
*
* Higher traffic class value means higher priority queue. This means
* that thread_priorities[7] value should contain the highest priority
* for the RX queue handling thread.
*/
static const u8_t thread_priorities[] = {
#if NET_TC_RX_COUNT == 1
7
#endif
#if NET_TC_RX_COUNT == 2
8, 7
#endif
#if NET_TC_RX_COUNT == 3
8, 7, 6
#endif
#if NET_TC_RX_COUNT == 4
8, 7, 6, 5
#endif
#if NET_TC_RX_COUNT == 5
8, 7, 6, 5, 4
#endif
#if NET_TC_RX_COUNT == 6
8, 7, 6, 5, 4, 3
#endif
#if NET_TC_RX_COUNT == 7
8, 7, 6, 5, 4, 3, 2
#endif
#if NET_TC_RX_COUNT == 8
8, 7, 6, 5, 4, 3, 2, 1
#endif
};
BUILD_ASSERT_MSG(NET_TC_RX_COUNT <= CONFIG_NUM_COOP_PRIORITIES,
"Too many traffic classes");
NET_ASSERT(tc < ARRAY_SIZE(thread_priorities));
return thread_priorities[tc];
}
#if defined(CONFIG_NET_SHELL)
#define TX_STACK(idx) NET_STACK_GET_NAME(TX, tx_stack, 0)[idx].stack
#define RX_STACK(idx) NET_STACK_GET_NAME(RX, rx_stack, 0)[idx].stack
#else
#define TX_STACK(idx) NET_STACK_GET_NAME(TX, tx_stack, 0)[idx]
#define RX_STACK(idx) NET_STACK_GET_NAME(RX, rx_stack, 0)[idx]
#endif
#if defined(CONFIG_NET_STATISTICS)
/* Fixup the traffic class statistics so that "net stats" shell command will
* print output correctly.
*/
static void tc_tx_stats_priority_setup(struct net_if *iface)
{
int i;
for (i = 0; i < 8; i++) {
net_stats_update_tc_sent_priority(iface, net_tx_priority2tc(i),
i);
}
}
static void tc_rx_stats_priority_setup(struct net_if *iface)
{
int i;
for (i = 0; i < 8; i++) {
net_stats_update_tc_recv_priority(iface, net_rx_priority2tc(i),
i);
}
}
static void net_tc_tx_stats_priority_setup(struct net_if *iface,
void *user_data)
{
ARG_UNUSED(user_data);
tc_tx_stats_priority_setup(iface);
}
static void net_tc_rx_stats_priority_setup(struct net_if *iface,
void *user_data)
{
ARG_UNUSED(user_data);
tc_rx_stats_priority_setup(iface);
}
#endif
/* Create workqueue for each traffic class we are using. All the network
* traffic goes through these classes. There needs to be at least one traffic
* class in the system.
*/
void net_tc_tx_init(void)
{
int i;
BUILD_ASSERT(NET_TC_TX_COUNT > 0);
#if defined(CONFIG_NET_STATISTICS)
net_if_foreach(net_tc_tx_stats_priority_setup, NULL);
#endif
for (i = 0; i < NET_TC_TX_COUNT; i++) {
u8_t thread_priority;
thread_priority = tx_tc2thread(i);
tx_classes[i].tc = thread_priority;
#if defined(CONFIG_NET_SHELL)
/* Fix the thread start address so that "net stacks"
* command will print correct stack information.
*/
NET_STACK_GET_NAME(TX, tx_stack, 0)[i].stack = tx_stack[i];
NET_STACK_GET_NAME(TX, tx_stack, 0)[i].prio = thread_priority;
NET_STACK_GET_NAME(TX, tx_stack, 0)[i].idx = i;
#endif
NET_DBG("[%d] Starting TX queue %p stack %p size %zd "
"prio %d (%d)", i,
&tx_classes[i].work_q.queue, TX_STACK(i),
K_THREAD_STACK_SIZEOF(tx_stack[i]),
thread_priority, K_PRIO_COOP(thread_priority));
k_work_q_start(&tx_classes[i].work_q,
tx_stack[i],
K_THREAD_STACK_SIZEOF(tx_stack[i]),
K_PRIO_COOP(thread_priority));
}
k_yield();
}
void net_tc_rx_init(void)
{
int i;
BUILD_ASSERT(NET_TC_RX_COUNT > 0);
#if defined(CONFIG_NET_STATISTICS)
net_if_foreach(net_tc_rx_stats_priority_setup, NULL);
#endif
for (i = 0; i < NET_TC_RX_COUNT; i++) {
u8_t thread_priority;
thread_priority = rx_tc2thread(i);
rx_classes[i].tc = thread_priority;
#if defined(CONFIG_NET_SHELL)
/* Fix the thread start address so that "net stacks"
* command will print correct stack information.
*/
NET_STACK_GET_NAME(RX, rx_stack, 0)[i].stack = rx_stack[i];
NET_STACK_GET_NAME(RX, rx_stack, 0)[i].prio = thread_priority;
NET_STACK_GET_NAME(RX, rx_stack, 0)[i].idx = i;
#endif
NET_DBG("[%d] Starting RX queue %p stack %p size %zd "
"prio %d (%d)", i,
&rx_classes[i].work_q.queue, RX_STACK(i),
K_THREAD_STACK_SIZEOF(rx_stack[i]),
thread_priority, K_PRIO_COOP(thread_priority));
k_work_q_start(&rx_classes[i].work_q,
rx_stack[i],
K_THREAD_STACK_SIZEOF(rx_stack[i]),
K_PRIO_COOP(thread_priority));
}
k_yield();
}
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