Function cbm_default_worker_count

src/foundation/system_info.c:283–306

}

int cbm_default_worker_count(bool initial) {
    /* CBM_WORKERS env override (clamped to [1, CBM_WORKERS_MAX]).
     * Useful inside containers where sysconf(_SC_NPROCESSORS_ONLN)
     * reports host CPUs rather than the cgroup's effective CPU quota.
     * Same precedence shape as other CBM_* env overrides:
     * explicit override > implicit detection. */
    char buf[CBM_SZ_32];
    if (cbm_safe_getenv("CBM_WORKERS", buf, sizeof(buf), NULL) != NULL) {
        long n = strtol(buf, NULL, CBM_DECIMAL_BASE);
        if (n >= MIN_WORKERS && n <= CBM_WORKERS_MAX) {
            return (int)n;
        }
        cbm_log_warn("workers.env.invalid", "value", buf, "fallback", "sysconf");
    }

    cbm_system_info_t info = cbm_system_info();
    if (initial) {
        /* Use all cores for initial indexing — user is waiting */
        return info.total_cores;
    }
    /* Incremental: leave headroom for user's apps */
    int workers = info.perf_cores - SKIP_ONE;
    return workers > 0 ? workers : MIN_WORKERS;
}