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iperf: added Tx bandwidth limit option

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This commit is contained in:
Ondrej Kosta
2022-01-13 16:01:07 +01:00
committed by BOT
parent ba62cbc04f
commit 3f7cf8a540
4 changed files with 60 additions and 20 deletions
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2
examples/common_components/iperf/include/iperf.h
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@@ -33,6 +33,7 @@ extern "C" {
#define IPERF_DEFAULT_PORT 5001
#define IPERF_DEFAULT_INTERVAL 3
#define IPERF_DEFAULT_TIME 30
#define IPERF_DEFAULT_NO_BW_LIMIT -1
#define IPERF_TRAFFIC_TASK_NAME "iperf_traffic"
#define IPERF_TRAFFIC_TASK_PRIORITY 4
@@ -67,6 +68,7 @@ typedef struct {
uint32_t interval;
uint32_t time;
uint16_t len_send_buf;
int32_t bw_lim;
} iperf_cfg_t;
esp_err_t iperf_start(iperf_cfg_t *cfg);

53
examples/common_components/iperf/iperf.c
View File

@@ -14,6 +14,8 @@
#include "freertos/task.h"
#include "esp_check.h"
#include "esp_log.h"
#include "esp_rom_sys.h"
#include "esp_timer.h"
#include "iperf.h"
typedef struct {
@@ -147,25 +149,40 @@ static void socket_recv(int recv_socket, struct sockaddr_storage listen_addr, ui
}
}
static void socket_send(int send_socket, struct sockaddr_storage dest_addr, uint8_t type)
static void socket_send(int send_socket, struct sockaddr_storage dest_addr, uint8_t type, int bw_lim)
{
bool retry = false;
uint8_t *buffer;
uint8_t delay = 0;
int actual_send = 0;
int want_send = 0;
int period_us = -1;
int delay_us = 0;
int64_t prev_time = 0;
int64_t send_time = 0;
int err = 0;
buffer = s_iperf_ctrl.buffer;
want_send = s_iperf_ctrl.buffer_len;
iperf_start_report();
if (bw_lim > 0) {
period_us = want_send * 8 / bw_lim;
}
while (!s_iperf_ctrl.finish) {
if (type == IPERF_TRANS_TYPE_UDP) {
if (false == retry) {
delay = 1;
if (period_us > 0) {
send_time = esp_timer_get_time();
if (actual_send > 0){
// Last packet "send" was successful, check how much off the previous loop duration was to the ideal send period. Result will adjust the
// next send delay.
delay_us += period_us + (int32_t)(prev_time - send_time);
} else {
// Last packet "send" was not successful. Ideally we should try to catch up the whole previous loop duration (e.g. prev_time - send_time).
// However, that's not possible since the most probable reason why the send was unsuccessful is the HW was not able to process the packet.
// Hence, we cannot queue more packets with shorter (or no) delay to catch up since we are already at the performance edge. The best we
// can do is to reset the send delay (which is probably big negative number) and start all over again.
delay_us = 0;
}
retry = false;
prev_time = send_time;
}
if (s_iperf_ctrl.cfg.type == IPERF_IP_TYPE_IPV6) {
actual_send = sendto(send_socket, buffer, want_send, 0, (struct sockaddr *)&dest_addr, sizeof(struct sockaddr_in6));
@@ -175,17 +192,9 @@ static void socket_send(int send_socket, struct sockaddr_storage dest_addr, uint
if (actual_send != want_send) {
if (type == IPERF_TRANS_TYPE_UDP) {
err = iperf_get_socket_error_code(send_socket);
if (err == ENOMEM) {
vTaskDelay(delay);
if (delay < IPERF_MAX_DELAY) {
delay <<= 1;
}
retry = true;
continue;
} else {
if (s_iperf_ctrl.cfg.type == IPERF_IP_TYPE_IPV4) {
ESP_LOGE(TAG, "udp client send abort: err=%d", err);
}
// ENOMEM is expected under heavy load => do not print it
if (err != ENOMEM) {
iperf_show_socket_error_reason("udp client send", send_socket);
}
}
if (type == IPERF_TRANS_TYPE_TCP) {
@@ -196,6 +205,10 @@ static void socket_send(int send_socket, struct sockaddr_storage dest_addr, uint
} else {
s_iperf_ctrl.actual_len += actual_send;
}
// The send delay may be negative, it indicates we are trying to catch up and hence to not delay the loop at all.
if (delay_us > 0) {
esp_rom_delay_us(delay_us);
}
}
}
@@ -316,7 +329,7 @@ static esp_err_t iperf_run_tcp_client(void)
memcpy(&dest_addr, &dest_addr4, sizeof(dest_addr4));
}
socket_send(client_socket, dest_addr, IPERF_TRANS_TYPE_TCP);
socket_send(client_socket, dest_addr, IPERF_TRANS_TYPE_TCP, s_iperf_ctrl.cfg.bw_lim);
exit:
if (client_socket != -1) {
shutdown(client_socket, 0);
@@ -423,7 +436,7 @@ static esp_err_t iperf_run_udp_client(void)
memcpy(&dest_addr, &dest_addr4, sizeof(dest_addr4));
}
socket_send(client_socket, dest_addr, IPERF_TRANS_TYPE_UDP);
socket_send(client_socket, dest_addr, IPERF_TRANS_TYPE_UDP, s_iperf_ctrl.cfg.bw_lim);
exit:
if (client_socket != -1) {
shutdown(client_socket, 0);