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sys/powerpc/powernv/platform_powernv.c
| Show First 20 Lines • Show All 475 Lines • ▼ Show 20 Lines | powernv_smp_probe_threads(platform_t plat) | ||||
| } | } | ||||
| smp_threads_per_core = nthreads; | smp_threads_per_core = nthreads; | ||||
| if (mp_ncpus % nthreads == 0) | if (mp_ncpus % nthreads == 0) | ||||
| mp_ncores = mp_ncpus / nthreads; | mp_ncores = mp_ncpus / nthreads; | ||||
| } | } | ||||
| static struct cpu_group * | static struct cpu_group * | ||||
| cpu_group_init(struct cpu_group *group, struct cpu_group *parent, | |||||
| const cpuset_t *cpus, int children, int level, int flags) | |||||
| { | |||||
| struct cpu_group *child; | |||||
| child = children != 0 ? smp_topo_alloc(children) : NULL; | |||||
| group->cg_parent = parent; | |||||
| group->cg_child = child; | |||||
| CPU_COPY(cpus, &group->cg_mask); | |||||
| group->cg_count = CPU_COUNT(cpus); | |||||
| group->cg_children = children; | |||||
| group->cg_level = level; | |||||
| group->cg_flags = flags; | |||||
| return (child); | |||||
| } | |||||
| static struct cpu_group * | |||||
| powernv_smp_topo(platform_t plat) | powernv_smp_topo(platform_t plat) | ||||
| { | { | ||||
| struct cpu_group *core, *dom, *root; | |||||
| cpuset_t corecpus, domcpus; | |||||
| int cpuid, i, j, k, ncores; | |||||
| if (mp_ncpus % smp_threads_per_core != 0) { | if (mp_ncpus % smp_threads_per_core != 0) { | ||||
| printf("WARNING: Irregular SMP topology. Performance may be " | printf("%s: irregular SMP topology (%d threads, %d per core)\n", | ||||
| "suboptimal (%d threads, %d on first core)\n", | __func__, mp_ncpus, smp_threads_per_core); | ||||
| mp_ncpus, smp_threads_per_core); | |||||
| return (smp_topo_none()); | return (smp_topo_none()); | ||||
| } | } | ||||
| /* Don't do anything fancier for non-threaded SMP */ | root = smp_topo_alloc(1); | ||||
| if (smp_threads_per_core == 1) | dom = cpu_group_init(root, NULL, &all_cpus, vm_ndomains, CG_SHARE_NONE, | ||||
| return (smp_topo_none()); | 0); | ||||
| return (smp_topo_1level(CG_SHARE_L1, smp_threads_per_core, | /* | ||||
| CG_FLAG_SMT)); | * Redundant layers will be collapsed by the caller so we don't need a | ||||
| * special case for a single domain. | |||||
| */ | |||||
| for (i = 0; i < vm_ndomains; i++, dom++) { | |||||
| CPU_COPY(&cpuset_domain[i], &domcpus); | |||||
| ncores = CPU_COUNT(&domcpus) / smp_threads_per_core; | |||||
| KASSERT(CPU_COUNT(&domcpus) % smp_threads_per_core == 0, | |||||
| ("%s: domain %d core count not divisible by thread count", | |||||
| __func__, i)); | |||||
| core = cpu_group_init(dom, root, &domcpus, ncores, CG_SHARE_L3, | |||||
| 0); | |||||
| for (j = 0; j < ncores; j++, core++) { | |||||
| /* | |||||
| * Assume that consecutive CPU IDs correspond to sibling | |||||
| * threads. | |||||
| */ | |||||
| CPU_ZERO(&corecpus); | |||||
| for (k = 0; k < smp_threads_per_core; k++) { | |||||
| cpuid = CPU_FFS(&domcpus) - 1; | |||||
| CPU_CLR(cpuid, &domcpus); | |||||
| CPU_SET(cpuid, &corecpus); | |||||
| } | |||||
| (void)cpu_group_init(core, dom, &corecpus, 0, | |||||
| CG_SHARE_L1, CG_FLAG_SMT); | |||||
| } | |||||
| } | |||||
| return (root); | |||||
| } | } | ||||
| #endif | #endif | ||||
| static void | static void | ||||
| powernv_reset(platform_t platform) | powernv_reset(platform_t platform) | ||||
| { | { | ||||
| ▲ Show 20 Lines • Show All 69 Lines • Show Last 20 Lines | |||||