Rodrigo Arias
d79b887182
The clock is now managed by the user, using the ovni_clock_now() function to sample the current value and ovni_ev_set_clock() to set the event clock timestamp. This change allows events with custom clock values.
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/*
|
|
* Copyright (c) 2021 Barcelona Supercomputing Center (BSC)
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#define _POSIX_C_SOURCE 200112L
|
|
#define _GNU_SOURCE
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/types.h>
|
|
#include <linux/limits.h>
|
|
#include <limits.h>
|
|
|
|
#include "ovni.h"
|
|
|
|
// Define gettid for older glibc versions (below 2.30)
|
|
#if !__GLIBC_PREREQ(2, 30)
|
|
static inline pid_t gettid(void)
|
|
{
|
|
return (pid_t)syscall(SYS_gettid);
|
|
}
|
|
#endif
|
|
|
|
static inline void
|
|
init(void)
|
|
{
|
|
char hostname[HOST_NAME_MAX];
|
|
|
|
if(gethostname(hostname, HOST_NAME_MAX) != 0)
|
|
{
|
|
perror("gethostname failed");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
ovni_proc_init(0, hostname, getpid());
|
|
ovni_thread_init(gettid());
|
|
ovni_add_cpu(0, 0);
|
|
}
|
|
|
|
static void emit(uint8_t *buf, size_t size)
|
|
{
|
|
struct ovni_ev ev = {0};
|
|
ovni_ev_set_mcv(&ev, "O$$");
|
|
ovni_ev_set_clock(&ev, ovni_clock_now());
|
|
ovni_ev_jumbo_emit(&ev, buf, size);
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
size_t payload_size;
|
|
uint8_t *payload_buf;
|
|
|
|
init();
|
|
|
|
payload_size = (size_t) (0.9 * (double) OVNI_MAX_EV_BUF);
|
|
payload_buf = calloc(1, payload_size);
|
|
|
|
if(!payload_buf)
|
|
{
|
|
perror("calloc failed");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
/* The first should fit, filling 90 % of the buffer */
|
|
emit(payload_buf, payload_size);
|
|
|
|
/* The second event would cause a flush */
|
|
emit(payload_buf, payload_size);
|
|
|
|
/* The third would cause the previous flush events to be written
|
|
* to disk */
|
|
emit(payload_buf, payload_size);
|
|
|
|
/* Flush the last event to disk manually */
|
|
ovni_flush();
|
|
ovni_proc_fini();
|
|
|
|
free(payload_buf);
|
|
|
|
return 0;
|
|
}
|