File size: 8,594 Bytes
c95a088 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 | /* ds4_gpu_args.c — shared parser for --gpu-vram and --gpu-devices.
*
* See ds4_gpu_args.h. The actual CUDA probing for the "auto" branch
* lives in ds4_cuda.cu so this .c file never includes <cuda_runtime.h>
* directly (mirroring the rest of the tree's separation between .c and
* .cu compilation units).
*/
#include "ds4_gpu_args.h"
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define DS4_GPU_ARGS_DEFAULT_SAFETY_MARGIN ((size_t)512 * 1024 * 1024)
/* Helper: copy at most outlen-1 bytes of msg into out and NUL-terminate. */
static void errbuf_set(char *out, size_t outlen, const char *msg) {
if (!out || outlen == 0) return;
size_t n = strlen(msg);
if (n >= outlen) n = outlen - 1;
memcpy(out, msg, n);
out[n] = '\0';
}
static void errbuf_setf(char *out, size_t outlen, const char *fmt, ...) {
if (!out || outlen == 0) return;
va_list ap;
va_start(ap, fmt);
vsnprintf(out, outlen, fmt, ap);
va_end(ap);
}
/* Maximum per-entry values. Generous, but small enough to keep all
* downstream arithmetic safely inside size_t/int. */
#define DS4_GPU_ARGS_MAX_VRAM_GB 16384 /* 16 TiB per device */
#define DS4_GPU_ARGS_MAX_DEVICE_INDEX 1023 /* CUDA visible-device ID cap */
/* Parse a comma-separated list of nonnegative integers into out_count
* entries of out[]. Returns 0 on success, nonzero on parse error.
* Empty entries (",,") or trailing/leading commas error. Per-entry
* upper bound enforced via max_value (use LONG_MAX for "no cap"). */
static int parse_csv_int_list(const char *s,
long *out,
int *out_count,
int max_count,
long max_value,
char *errbuf,
size_t errbuflen,
const char *what) {
*out_count = 0;
if (!s || !*s) {
errbuf_setf(errbuf, errbuflen, "%s: empty value", what);
return 1;
}
const char *p = s;
while (*p) {
/* Disallow leading whitespace inside the list. */
while (*p == ' ' || *p == '\t') p++;
char *end = NULL;
errno = 0;
long v = strtol(p, &end, 10);
if (end == p) {
errbuf_setf(errbuf, errbuflen, "%s: not a number: '%s'", what, p);
return 1;
}
if (errno != 0 || v < 0 || v > max_value) {
errbuf_setf(errbuf, errbuflen,
"%s: out-of-range value: '%s' (allowed 0..%ld)",
what, p, max_value);
return 1;
}
if (*out_count >= max_count) {
errbuf_setf(errbuf, errbuflen, "%s: too many entries (max %d)", what, max_count);
return 1;
}
out[*out_count] = v;
(*out_count)++;
while (*end == ' ' || *end == '\t') end++;
if (*end == ',') {
end++;
if (*end == '\0' || *end == ',') {
errbuf_setf(errbuf, errbuflen, "%s: empty entry near '%s'", what, end);
return 1;
}
} else if (*end != '\0') {
errbuf_setf(errbuf, errbuflen, "%s: junk after value: '%s'", what, end);
return 1;
}
p = end;
}
if (*out_count == 0) {
errbuf_setf(errbuf, errbuflen, "%s: no values parsed", what);
return 1;
}
return 0;
}
int parse_gpu_vram_arg(const char *vram_arg,
const char *devices_arg,
ds4_gpu_config *out,
bool *out_skip_cuda,
char *errbuf,
size_t errbuflen) {
if (!out || !out_skip_cuda) {
errbuf_set(errbuf, errbuflen, "internal: NULL out parameter");
return 1;
}
*out_skip_cuda = false;
/* Caller zeroed *out — just confirm. */
out->n_gpus = 0;
out->safety_margin_bytes = DS4_GPU_ARGS_DEFAULT_SAFETY_MARGIN;
/* Parse devices_arg first so we have the filter when handling "auto". */
long dev_list[DS4_MAX_GPUS] = {0};
int dev_count = 0;
if (devices_arg) {
if (parse_csv_int_list(devices_arg, dev_list, &dev_count,
DS4_MAX_GPUS,
DS4_GPU_ARGS_MAX_DEVICE_INDEX,
errbuf, errbuflen,
"--gpu-devices") != 0) {
return 1;
}
}
/* Case 1: vram_arg unset. */
if (vram_arg == NULL) {
if (devices_arg == NULL) {
errbuf_set(errbuf, errbuflen, "internal: parse_gpu_vram_arg called with both args NULL");
return 1;
}
/* --gpu-devices given without --gpu-vram: implicit auto with filter. */
vram_arg = "auto";
}
/* Case 2: --gpu-vram 0 — short-circuit. */
if (!strcmp(vram_arg, "0")) {
if (devices_arg) {
errbuf_set(errbuf, errbuflen,
"--gpu-vram 0 conflicts with --gpu-devices");
return 1;
}
*out_skip_cuda = true;
return 0;
}
/* Case 3: --gpu-vram auto. */
if (!strcmp(vram_arg, "auto")) {
#if !defined(DS4_NO_GPU) && !defined(__APPLE__)
int filter_buf[DS4_MAX_GPUS];
const int *filter_ptr = NULL;
if (dev_count > 0) {
for (int i = 0; i < dev_count; i++) filter_buf[i] = (int)dev_list[i];
filter_ptr = filter_buf;
}
if (ds4_gpu_args_probe_auto_cuda(filter_ptr, dev_count, out,
out->safety_margin_bytes,
errbuf, errbuflen) != 0) {
return 1;
}
return 0;
#else
(void)dev_list; (void)dev_count;
errbuf_set(errbuf, errbuflen,
"--gpu-vram auto requires a CUDA build");
return 1;
#endif
}
/* Case 4: explicit GB budgets — "N[,N...]" */
long vram_list[DS4_MAX_GPUS] = {0};
int vram_count = 0;
if (parse_csv_int_list(vram_arg, vram_list, &vram_count,
DS4_MAX_GPUS,
DS4_GPU_ARGS_MAX_VRAM_GB,
errbuf, errbuflen,
"--gpu-vram") != 0) {
return 1;
}
if (dev_count > 0 && dev_count != vram_count) {
errbuf_setf(errbuf, errbuflen,
"--gpu-devices count (%d) does not match --gpu-vram count (%d)",
dev_count, vram_count);
return 1;
}
out->n_gpus = vram_count;
for (int i = 0; i < vram_count; i++) {
int dev_id = (dev_count > 0) ? (int)dev_list[i] : i;
out->device_indices[i] = dev_id;
out->vram_bytes[i] = (size_t)vram_list[i] * (size_t)1024 * 1024 * 1024;
}
return 0;
}
int format_gpu_layout_line(const ds4_gpu_config *cfg,
bool was_auto,
char *out,
size_t outlen) {
if (!out || outlen == 0 || !cfg) return -1;
/* "ds4: GPU config: N devices [d0,d1,...] requested, budgets G0,G1,... GB; auto=<bool>" */
int written = snprintf(out, outlen,
"ds4: GPU config: %d device%s [",
cfg->n_gpus, cfg->n_gpus == 1 ? "" : "s");
if (written < 0 || (size_t)written >= outlen) return written;
for (int i = 0; i < cfg->n_gpus; i++) {
int n = snprintf(out + written, outlen - (size_t)written,
"%s%d", i ? "," : "", cfg->device_indices[i]);
if (n < 0 || (size_t)(written + n) >= outlen) return written + n;
written += n;
}
int n = snprintf(out + written, outlen - (size_t)written,
"] requested, budgets ");
if (n < 0 || (size_t)(written + n) >= outlen) return written + n;
written += n;
for (int i = 0; i < cfg->n_gpus; i++) {
double gb = (double)cfg->vram_bytes[i] / (1024.0 * 1024.0 * 1024.0);
int m = snprintf(out + written, outlen - (size_t)written,
"%s%.0f", i ? "," : "", gb);
if (m < 0 || (size_t)(written + m) >= outlen) return written + m;
written += m;
}
int t = snprintf(out + written, outlen - (size_t)written,
" GB; auto=%s", was_auto ? "true" : "false");
if (t < 0) return t;
written += t;
return written;
}
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