69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
/* Copyright (c) 2021-2023 Barcelona Supercomputing Center (BSC)
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* SPDX-License-Identifier: GPL-3.0-or-later */
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "common.h"
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#include "compat.h"
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#include "ovni.h"
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int64_t delta = 0LL;
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static void
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thread_execute_delayed(int32_t cpu, int32_t creator_tid, uint64_t tag)
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{
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struct ovni_ev ev = {0};
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ovni_ev_set_mcv(&ev, "OHx");
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ovni_ev_set_clock(&ev, ovni_clock_now() + delta);
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ovni_payload_add(&ev, (uint8_t *) &cpu, sizeof(cpu));
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ovni_payload_add(&ev, (uint8_t *) &creator_tid, sizeof(creator_tid));
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ovni_payload_add(&ev, (uint8_t *) &tag, sizeof(tag));
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ovni_ev_emit(&ev);
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}
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static inline void
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start_delayed(int rank, int nranks)
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{
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char hostname[OVNI_MAX_HOSTNAME];
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char rankname[OVNI_MAX_HOSTNAME + 64];
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if (gethostname(hostname, OVNI_MAX_HOSTNAME) != 0)
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die("gethostname failed");
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sprintf(rankname, "%s.%d", hostname, rank);
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ovni_version_check();
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ovni_proc_init(1, rankname, getpid());
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ovni_proc_set_rank(rank, nranks);
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ovni_thread_init(get_tid());
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/* All ranks inform CPUs */
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for (int i = 0; i < nranks; i++)
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ovni_add_cpu(i, i);
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int curcpu = rank;
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dbg("thread %d has cpu %d (ncpus=%d)",
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get_tid(), curcpu, nranks);
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delta = ((int64_t) rank) * 2LL * 3600LL * 1000LL * 1000LL * 1000LL;
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thread_execute_delayed(curcpu, -1, 0);
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}
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int
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main(void)
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{
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int rank = atoi(getenv("OVNI_RANK"));
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int nranks = atoi(getenv("OVNI_NRANKS"));
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start_delayed(rank, nranks);
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ovni_flush();
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ovni_thread_free();
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ovni_proc_fini();
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return 0;
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}
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