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/* Copyright (c) 2013, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* @file
*
* @example odp_isol_test.c ODP isolation example application
*/
#include <string.h>
#include <stdlib.h>
/* ODP main header */
#include <odp.h>
/* ODP helper for Linux apps */
#include <helper/odp_linux.h>
/* GNU lib C */
#include <getopt.h>
#define MAX_WORKERS 32 /**< Max worker threads */
/**
* Parsed command line application arguments
*/
typedef struct {
int core_count; /**< Core count*/
char **core_name; /**< Array of pointers to core name */
} appl_args_t;
/**
* @internal Print help
*/
static void print_usage(void)
{
printf("\n\nUsage: ./odp_isolation [options]\n");
printf("Options:\n");
printf(" -l, --cpulist <cpu number in comma separated fashion>\n");
printf(" -h, --help this help\n");
printf("\n\n");
}
/**
* @internal Worker thread
*
* @param arg Arguments
*
* @return NULL on failure
*/
static void *run_thread(void *arg)
{
int thr;
unsigned long long tick = 0;
int counter = 0;
thr = odp_thread_id();
printf("Thread %i starts on core %i\n", thr, odp_thread_core());
/* loop for some duration then exit */
do {
tick++;
if (tick > 10000000) {
tick = 0;
counter++;
}
if (counter == 1000)
break;
} while (1);
return arg;
}
/**
* @internal Parse arguments
*
* @param argc Argument count
* @param argv Argument vector
* @param args Test arguments
*/
static void parse_args(int argc, char *argv[], appl_args_t *args)
{
int opt;
int long_index;
char *names, *str, *token, *save;
size_t len;
int i;
static struct option longopts[] = {
{"cpulists", required_argument, NULL, 'l'}, /* return 'l' */
{"help", no_argument, NULL, 'h'}, /* return 'h' */
{NULL, 0, NULL, 0}
};
while (1) {
opt = getopt_long(argc, argv, "+l:h", longopts, &long_index);
if (opt == -1)
break; /* No more options */
switch (opt) {
case 'l':
len = strlen(optarg);
if (len == 0) {
print_usage();
exit(EXIT_FAILURE);
}
len += 1; /* add room for '\0' */
names = malloc(len);
if (names == NULL) {
print_usage();
exit(EXIT_FAILURE);
}
/* count the number of tokens separated by ',' */
strcpy(names, optarg);
for (str = names, i = 0;; str = NULL, i++) {
token = strtok_r(str, ",", &save);
if (token == NULL)
break;
}
args->core_count = i;
if (args->core_count == 0) {
print_usage();
exit(EXIT_FAILURE);
}
/* allocate storage for the if names */
args->core_name =
calloc(args->core_count, sizeof(char *));
/* store the if names (reset names string) */
strcpy(names, optarg);
for (str = names, i = 0;; str = NULL, i++) {
token = strtok_r(str, ",", &save);
if (token == NULL)
break;
args->core_name[i] = token;
}
break;
case 'h':
print_usage();
exit(EXIT_SUCCESS);
break;
default:
break;
}
}
}
/**
* Isolation test application
*/
int main(int argc, char *argv[])
{
odp_linux_pthread_t thread_tbl[MAX_WORKERS];
appl_args_t args;
int thr_id;
int num_workers;
int first_core;
int i;
printf("\nODP isolation test application\n");
memset(&args, 0, sizeof(args));
parse_args(argc, argv, &args);
memset(thread_tbl, 0, sizeof(thread_tbl));
/*
* Don't need timer init for isolation, so mask them.
*/
if (odp_init_global(ODP_INIT_F_ALL & ~ODP_INIT_F_TIMER)) {
printf("ODP global init failed.\n");
return -1;
}
printf("\n");
printf("ODP system info\n");
printf("---------------\n");
printf("ODP API version: %s\n", odp_version_api_str());
printf("CPU model: %s\n", odp_sys_cpu_model_str());
printf("CPU freq (hz): %"PRIu64"\n", odp_sys_cpu_hz());
printf("Cache line size: %i\n", odp_sys_cache_line_size());
printf("Max core count: %i\n", odp_sys_core_count());
printf("\n");
/* A worker thread per core */
num_workers = odp_sys_core_count();
if (args.core_count)
num_workers = args.core_count;
/* force to max core count */
if (num_workers > MAX_WORKERS)
num_workers = MAX_WORKERS;
printf("num worker threads: %i\n", num_workers);
/*
* Init this thread.
* */
thr_id = odp_thread_create(0);
odp_init_local(thr_id);
/*
* create dummy dp thread and don't pin them on any core,
* use odp-on-isolated-cpu.sh script to define dplane cpuset
* and to pin, run app on them, Refer readme.
*/
for (i=0; i<num_workers; i++) {
first_core = atoi(args.core_name[i]);
/* Create and launch worker threads */
odp_linux_pthread_create(&thread_tbl[i], 1, first_core,
run_thread, NULL);
}
/* Wait for worker threads to exit */
odp_linux_pthread_join(thread_tbl, num_workers);
printf("ODP isolation test complete\n\n");
return 0;
}
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