175 lines
3.8 KiB
C
175 lines
3.8 KiB
C
/* Copyright (c) 2021-2022 Barcelona Supercomputing Center (BSC)
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* SPDX-License-Identifier: MIT */
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#ifndef OVNI_H
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#define OVNI_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <limits.h>
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#include <linux/limits.h>
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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 <string.h>
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#include <sys/types.h>
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/* Hardcode the JSON_Value to avoid a dependency with janson */
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typedef struct json_value_t JSON_Value;
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#define OVNI_METADATA_VERSION 1
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#define OVNI_TRACEDIR "ovni"
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#define OVNI_MAX_HOSTNAME 512
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/* Reserved buffer for event allocation per thread */
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#define OVNI_MAX_EV_BUF (2 * 1024LL * 1024LL) /* 2 MiB */
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#define OVNI_STREAM_MAGIC "ovni"
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#define OVNI_STREAM_VERSION 1
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#define OVNI_MODEL_VERSION "O1 V1 T1 M1 D1 K1 61"
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#define OVNI_STREAM_EXT ".obs"
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/* Follow https://semver.org rules for versioning */
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#define OVNI_LIB_VERSION "1.0.0"
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/* ----------------------- common ------------------------ */
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enum ovni_ev_flags {
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OVNI_EV_JUMBO = 0x10,
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};
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struct __attribute__((__packed__)) ovni_jumbo_payload {
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uint32_t size;
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uint8_t data[1];
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};
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union __attribute__((__packed__)) ovni_ev_payload {
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int8_t i8[16];
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int16_t i16[8];
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int32_t i32[4];
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int64_t i64[2];
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uint8_t u8[16];
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uint16_t u16[8];
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uint32_t u32[4];
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uint64_t u64[2];
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struct ovni_jumbo_payload jumbo;
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};
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struct __attribute__((__packed__)) ovni_ev_header {
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/* first 4 bits reserved, last 4 for payload size */
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uint8_t flags;
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uint8_t model;
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uint8_t category;
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uint8_t value;
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uint64_t clock;
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};
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struct __attribute__((__packed__)) ovni_ev {
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struct ovni_ev_header header;
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/* The payload size may vary depending on the ev type:
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* - normal: 0, or 2 to 16 bytes
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* - jumbo: 0 to 2^32 - 1 bytes */
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union ovni_ev_payload payload;
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};
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struct __attribute__((__packed__)) ovni_stream_header {
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char magic[4];
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uint32_t version;
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};
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/* ----------------------- runtime ------------------------ */
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/* State of each thread on runtime */
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struct ovni_rthread {
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/* Current thread id */
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pid_t tid;
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/* Stream trace file descriptor */
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int streamfd;
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int ready;
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/* The number of bytes filled with events */
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size_t evlen;
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/* Buffer to write events */
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uint8_t *evbuf;
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};
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/* State of each process on runtime */
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struct ovni_rproc {
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/* Where the process trace is finally copied */
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char procdir_final[PATH_MAX];
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/* Where the process trace is flushed */
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char procdir[PATH_MAX];
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/* If needs to be moved at the end */
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int move_to_final;
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int app;
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int pid;
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char loom[OVNI_MAX_HOSTNAME];
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int ncpus;
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clockid_t clockid;
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int ready;
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JSON_Value *meta;
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};
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#define ovni_version_check() ovni_version_check_str(OVNI_LIB_VERSION)
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void ovni_version_check_str(const char *version);
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void ovni_proc_init(int app, const char *loom, int pid);
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/* Sets the MPI rank of the current process and the number of total nranks */
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void ovni_proc_set_rank(int rank, int nranks);
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void ovni_proc_fini(void);
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void ovni_thread_init(pid_t tid);
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void ovni_thread_free(void);
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int ovni_thread_isready(void);
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void ovni_ev_set_mcv(struct ovni_ev *ev, const char *mcv);
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/* Gets the event clock in ns */
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uint64_t ovni_ev_get_clock(const struct ovni_ev *ev);
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/* Sets the event clock in ns */
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void ovni_ev_set_clock(struct ovni_ev *ev, uint64_t clock);
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/* Returns the current value of the ovni clock in ns */
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uint64_t ovni_clock_now(void);
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void ovni_payload_add(struct ovni_ev *ev, const uint8_t *buf, int size);
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int ovni_ev_size(const struct ovni_ev *ev);
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int ovni_payload_size(const struct ovni_ev *ev);
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void ovni_add_cpu(int index, int phyid);
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/* Adds the event to the events buffer. The buffer is flushed first if the event
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* doesn't fit in the buffer. */
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void ovni_ev_emit(struct ovni_ev *ev);
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void ovni_ev_jumbo_emit(struct ovni_ev *ev, const uint8_t *buf, uint32_t bufsize);
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void ovni_flush(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* OVNI_H */
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