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DeeJanuzandClaude Opus 5.5
1a76d1560b
The history of frame-hands (~/Desktop/Projects/frame-hands on the Frame), filtered to what moves: the camera broker (camd/), the tracker and its offline tools (trackd/), the shared file layouts (include/), the ncnn models, the analysis tools, and the calibration and model helpers they import from the Python prototype. The reverse-engineering notes, probes, camprobe, and the rest of the prototype stay in frame-hands. Unchanged here: the renames to ft- names and Frametop paths follow. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* tp - read kernel tracepoints system-wide through perf_event_open.
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*
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* One perf ring per CPU; every event on that CPU writes into it. Field
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* offsets come from the tracefs format files, so kernel layout changes don't
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* silently break parsing. Needs root (or CAP_PERFMON plus tracefs access).
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*/
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#pragma once
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#define TP_MAX_FIELDS 40
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#define TP_MAX_EVENTS 8
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#define TP_MAX_CPUS 64
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#define TP_MAX_PENDING 2048
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#define TP_MAX_RAW 256
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typedef struct {
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char name[48];
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int offset;
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int size;
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bool is_signed;
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} tp_field_t;
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typedef struct {
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char system[32];
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char name[48];
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int id;
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tp_field_t fields[TP_MAX_FIELDS];
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int nfields;
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} tp_event_t;
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typedef struct {
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const tp_event_t *ev;
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const uint8_t *raw;
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uint32_t rawlen;
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uint64_t time; /* CLOCK_MONOTONIC ns */
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uint32_t cpu;
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uint32_t pid;
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uint32_t tid;
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} tp_sample_t;
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typedef void (*tp_cb)(void *ctx, const tp_sample_t *s);
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typedef struct {
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int ncpu;
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int ring_fd[TP_MAX_CPUS];
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void *ring[TP_MAX_CPUS];
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size_t map_len;
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int fds[TP_MAX_CPUS * TP_MAX_EVENTS];
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int nfds;
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int epfd;
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tp_event_t *events[TP_MAX_EVENTS];
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int nevents;
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uint64_t lost;
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uint8_t scratch[65536];
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/* samples drained from all rings, sorted by time before dispatch */
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tp_sample_t pend[TP_MAX_PENDING];
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uint8_t pend_raw[TP_MAX_PENDING][TP_MAX_RAW];
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int npend;
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} tp_t;
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bool tp_event_load(tp_event_t *ev, const char *system, const char *name, char *err, size_t errn);
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int tp_field(const tp_event_t *ev, const char *name);
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int64_t tp_get(const tp_event_t *ev, int field, const uint8_t *raw, uint32_t rawlen);
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bool tp_open(tp_t *tp, tp_event_t **events, int nevents, char *err, size_t errn);
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/*
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* Wait up to timeout_ms, then hand every pending sample to cb in time order,
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* across all CPUs. Returns samples read, -1 on error.
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*/
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int tp_poll(tp_t *tp, int timeout_ms, tp_cb cb, void *ctx);
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void tp_close(tp_t *tp);
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