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rework threads in 5G

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This commit is contained in:
laurent
2019-04-30 10:17:08 +02:00
parent db79d72b37
commit 8a92138086
33 changed files with 5174 additions and 285 deletions
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common/utils/system.c
+115 -21
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@@ -28,13 +28,23 @@
* separate process solves this problem.
*/
#define _GNU_SOURCE
#include "system.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <string.h>
#include <stdint.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <pthread.h>
#include <common/utils/assertions.h>
#include <common/utils/LOG/log.h>
#define MAX_COMMAND 4096
static int command_pipe_read;
@@ -50,37 +60,37 @@ static int module_initialized = 0;
/* util functions */
/********************************************************************/
static void lock_system(void)
{
static void lock_system(void) {
if (pthread_mutex_lock(&lock) != 0) {
printf("pthread_mutex_lock fails\n");
abort();
}
}
static void unlock_system(void)
{
static void unlock_system(void) {
if (pthread_mutex_unlock(&lock) != 0) {
printf("pthread_mutex_unlock fails\n");
abort();
}
}
static void write_pipe(int p, char *b, int size)
{
static void write_pipe(int p, char *b, int size) {
while (size) {
int ret = write(p, b, size);
if (ret <= 0) exit(0);
b += ret;
size -= ret;
}
}
static void read_pipe(int p, char *b, int size)
{
static void read_pipe(int p, char *b, int size) {
while (size) {
int ret = read(p, b, size);
if (ret <= 0) exit(0);
b += ret;
size -= ret;
}
@@ -95,14 +105,13 @@ static void read_pipe(int p, char *b, int size)
* when the main process exits, because then a "read" on the pipe
* will return 0, in which case "read_pipe" exits.
*/
static void background_system_process(void)
{
static void background_system_process(void) {
int len;
int ret;
char command[MAX_COMMAND+1];
while (1) {
read_pipe(command_pipe_read, (char*)&len, sizeof(int));
read_pipe(command_pipe_read, (char *)&len, sizeof(int));
read_pipe(command_pipe_read, command, len);
ret = system(command);
write_pipe(result_pipe_write, (char *)&ret, sizeof(int));
@@ -114,8 +123,7 @@ static void background_system_process(void)
/* return -1 on error, 0 on success */
/********************************************************************/
int background_system(char *command)
{
int background_system(char *command) {
int res;
int len;
@@ -125,18 +133,22 @@ int background_system(char *command)
}
len = strlen(command)+1;
if (len > MAX_COMMAND) {
printf("FATAL: command too long. Increase MAX_COMMAND (%d).\n", MAX_COMMAND);
printf("command was: '%s'\n", command);
abort();
}
/* only one command can run at a time, so let's lock/unlock */
lock_system();
write_pipe(command_pipe_write, (char*)&len, sizeof(int));
write_pipe(command_pipe_write, (char *)&len, sizeof(int));
write_pipe(command_pipe_write, command, len);
read_pipe(result_pipe_read, (char*)&res, sizeof(int));
read_pipe(result_pipe_read, (char *)&res, sizeof(int));
unlock_system();
if (res == -1 || !WIFEXITED(res) || WEXITSTATUS(res) != 0) return -1;
return 0;
}
@@ -146,17 +158,16 @@ int background_system(char *command)
/* to be called very early by the main processing */
/********************************************************************/
void start_background_system(void)
{
void start_background_system(void) {
int p[2];
pid_t son;
module_initialized = 1;
if (pipe(p) == -1) {
perror("pipe");
exit(1);
}
command_pipe_read = p[0];
command_pipe_write = p[1];
@@ -164,10 +175,11 @@ void start_background_system(void)
perror("pipe");
exit(1);
}
result_pipe_read = p[0];
result_pipe_write = p[1];
son = fork();
if (son == -1) {
perror("fork");
exit(1);
@@ -181,6 +193,88 @@ void start_background_system(void)
close(result_pipe_read);
close(command_pipe_write);
background_system_process();
}
void thread_top_init(char *thread_name,
int affinity,
uint64_t runtime,
uint64_t deadline,
uint64_t period) {
#ifdef DEADLINE_SCHEDULER
struct sched_attr attr;
unsigned int flags = 0;
attr.size = sizeof(attr);
attr.sched_flags = 0;
attr.sched_nice = 0;
attr.sched_priority = 0;
attr.sched_policy = SCHED_DEADLINE;
attr.sched_runtime = runtime;
attr.sched_deadline = deadline;
attr.sched_period = period;
AssertFatal(sched_setattr(0, &attr, flags) == 0, "[SCHED] eNB tx thread: sched_setattr failed\n");
#else
#ifdef CPU_AFFINITY
/* Set affinity mask to include CPUs 2 to MAX_CPUS */
/* CPU 0 is reserved for UHD threads */ /* CPU 1 is reserved for all RX_TX threads */
/* Enable CPU Affinity only if number of CPUs > 2 */
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
if (affinity == 0) {
LOG_W(HW,"thread_top_init() called with affinity==0, but overruled by #ifdef CPU_AFFINITY\n");
} else if (get_nprocs() > 2) {
for (j = 2; j < get_nprocs(); j++)
CPU_SET(j, &cpuset);
AssertFatal( pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset) == 0, "Error setting processor affinity");
}
#endif //CPU_AFFINITY
struct sched_param sparam={0};
sparam.sched_priority = OAI_PRIORITY_RT;
AssertFatal(pthread_setschedparam(pthread_self(),SCHED_FIFO , &sparam) == 0,"Error setting thread priority");
pthread_setname_np(pthread_self(), thread_name);
#endif
mlockall(MCL_CURRENT | MCL_FUTURE);
}
void threadTopInit(const char* name, const int affinity, const int priority){
struct sched_param sparam={0};
sparam.sched_priority = priority;
AssertFatal(pthread_setschedparam(pthread_self(),SCHED_FIFO , &sparam) == 0,"Error setting thread priority");
pthread_setname_np(pthread_self(), name);
if (affinity != -1 ) {
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(affinity, &cpuset);
AssertFatal( pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset) == 0, "Error setting processor affinity");
}
}
// Block CPU C-states deep sleep
void configure_linux(void) {
int ret;
static int latency_target_fd=-1;
uint32_t latency_target_value=10; // in microseconds
if (latency_target_fd == -1) {
if ( (latency_target_fd = open("/dev/cpu_dma_latency", O_RDWR)) != -1 ) {
ret = write(latency_target_fd, &latency_target_value, sizeof(latency_target_value));
if (ret == 0) {
printf("# error setting cpu_dma_latency to %d!: %s\n", latency_target_value, strerror(errno));
close(latency_target_fd);
latency_target_fd=-1;
return;
}
}
}
if (latency_target_fd != -1)
LOG_I(HW,"# /dev/cpu_dma_latency set to %dus\n", latency_target_value);
else
LOG_E(HW,"Can't set /dev/cpu_dma_latency to %dus\n", latency_target_value);
// Set CPU frequency to it's maximum
if ( 0 != system("for d in /sys/devices/system/cpu/cpu[0-9]*; do cat $d/cpufreq/cpuinfo_max_freq > $d/cpufreq/scaling_min_freq; done"))
LOG_W(HW,"Can't set cpu frequency\n");
}