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#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <emscripten/threading.h>
#include <cpuinfo.h>
#include <cpuinfo/internal-api.h>
#include <cpuinfo/log.h>
static const volatile float infinity = INFINITY;
static struct cpuinfo_package static_package = { };
static struct cpuinfo_cache static_x86_l3 = {
.size = 2 * 1024 * 1024,
.associativity = 16,
.sets = 2048,
.partitions = 1,
.line_size = 64,
};
void cpuinfo_emscripten_init(void) {
struct cpuinfo_processor* processors = NULL;
struct cpuinfo_core* cores = NULL;
struct cpuinfo_cluster* clusters = NULL;
struct cpuinfo_cache* l1i = NULL;
struct cpuinfo_cache* l1d = NULL;
struct cpuinfo_cache* l2 = NULL;
const bool is_x86 = signbit(infinity - infinity);
int logical_cores_count = emscripten_num_logical_cores();
if (logical_cores_count <= 0) {
logical_cores_count = 1;
}
uint32_t processor_count = (uint32_t) logical_cores_count;
uint32_t core_count = processor_count;
uint32_t cluster_count = 1;
uint32_t big_cluster_core_count = core_count;
uint32_t processors_per_core = 1;
if (is_x86) {
if (processor_count % 2 == 0) {
processors_per_core = 2;
core_count = processor_count / 2;
big_cluster_core_count = core_count;
}
} else {
/* Assume ARM/ARM64 */
if (processor_count > 4) {
/* Assume big.LITTLE architecture */
cluster_count = 2;
big_cluster_core_count = processor_count >= 8 ? 4 : 2;
}
}
uint32_t l2_count = is_x86 ? core_count : cluster_count;
processors = calloc(processor_count, sizeof(struct cpuinfo_processor));
if (processors == NULL) {
cpuinfo_log_error("failed to allocate %zu bytes for descriptions of %"PRIu32" logical processors",
processor_count * sizeof(struct cpuinfo_processor), processor_count);
goto cleanup;
}
cores = calloc(processor_count, sizeof(struct cpuinfo_core));
if (cores == NULL) {
cpuinfo_log_error("failed to allocate %zu bytes for descriptions of %"PRIu32" cores",
processor_count * sizeof(struct cpuinfo_core), processor_count);
goto cleanup;
}
clusters = calloc(cluster_count, sizeof(struct cpuinfo_cluster));
if (clusters == NULL) {
cpuinfo_log_error("failed to allocate %zu bytes for descriptions of %"PRIu32" clusters",
cluster_count * sizeof(struct cpuinfo_cluster), cluster_count);
goto cleanup;
}
l1i = calloc(core_count, sizeof(struct cpuinfo_cache));
if (l1i == NULL) {
cpuinfo_log_error("failed to allocate %zu bytes for descriptions of %"PRIu32" L1I caches",
core_count * sizeof(struct cpuinfo_cache), core_count);
goto cleanup;
}
l1d = calloc(core_count, sizeof(struct cpuinfo_cache));
if (l1d == NULL) {
cpuinfo_log_error("failed to allocate %zu bytes for descriptions of %"PRIu32" L1D caches",
core_count * sizeof(struct cpuinfo_cache), core_count);
goto cleanup;
}
l2 = calloc(l2_count, sizeof(struct cpuinfo_cache));
if (l2 == NULL) {
cpuinfo_log_error("failed to allocate %zu bytes for descriptions of %"PRIu32" L2 caches",
l2_count * sizeof(struct cpuinfo_cache), l2_count);
goto cleanup;
}
static_package.processor_count = processor_count;
static_package.core_count = core_count;
static_package.cluster_count = cluster_count;
if (is_x86) {
strncpy(static_package.name, "x86 vCPU", CPUINFO_PACKAGE_NAME_MAX);
} else {
strncpy(static_package.name, "ARM vCPU", CPUINFO_PACKAGE_NAME_MAX);
}
for (uint32_t i = 0; i < core_count; i++) {
for (uint32_t j = 0; j < processors_per_core; j++) {
processors[i * processors_per_core + j] = (struct cpuinfo_processor) {
.smt_id = j,
.core = cores + i,
.cluster = clusters + (uint32_t) (i >= big_cluster_core_count),
.package = &static_package,
.cache.l1i = l1i + i,
.cache.l1d = l1d + i,
.cache.l2 = is_x86 ? l2 + i : l2 + (uint32_t) (i >= big_cluster_core_count),
.cache.l3 = is_x86 ? &static_x86_l3 : NULL,
};
}
cores[i] = (struct cpuinfo_core) {
.processor_start = i * processors_per_core,
.processor_count = processors_per_core,
.core_id = i,
.cluster = clusters + (uint32_t) (i >= big_cluster_core_count),
.package = &static_package,
.vendor = cpuinfo_vendor_unknown,
.uarch = cpuinfo_uarch_unknown,
.frequency = 0,
};
l1i[i] = (struct cpuinfo_cache) {
.size = 32 * 1024,
.associativity = 4,
.sets = 128,
.partitions = 1,
.line_size = 64,
.processor_start = i * processors_per_core,
.processor_count = processors_per_core,
};
l1d[i] = (struct cpuinfo_cache) {
.size = 32 * 1024,
.associativity = 4,
.sets = 128,
.partitions = 1,
.line_size = 64,
.processor_start = i * processors_per_core,
.processor_count = processors_per_core,
};
if (is_x86) {
l2[i] = (struct cpuinfo_cache) {
.size = 256 * 1024,
.associativity = 8,
.sets = 512,
.partitions = 1,
.line_size = 64,
.processor_start = i * processors_per_core,
.processor_count = processors_per_core,
};
}
}
if (is_x86) {
clusters[0] = (struct cpuinfo_cluster) {
.processor_start = 0,
.processor_count = processor_count,
.core_start = 0,
.core_count = core_count,
.cluster_id = 0,
.package = &static_package,
.vendor = cpuinfo_vendor_unknown,
.uarch = cpuinfo_uarch_unknown,
.frequency = 0,
};
static_x86_l3.processor_count = processor_count;
} else {
clusters[0] = (struct cpuinfo_cluster) {
.processor_start = 0,
.processor_count = big_cluster_core_count,
.core_start = 0,
.core_count = big_cluster_core_count,
.cluster_id = 0,
.package = &static_package,
.vendor = cpuinfo_vendor_unknown,
.uarch = cpuinfo_uarch_unknown,
.frequency = 0,
};
l2[0] = (struct cpuinfo_cache) {
.size = 1024 * 1024,
.associativity = 8,
.sets = 2048,
.partitions = 1,
.line_size = 64,
.processor_start = 0,
.processor_count = big_cluster_core_count,
};
if (cluster_count > 1) {
l2[1] = (struct cpuinfo_cache) {
.size = 256 * 1024,
.associativity = 8,
.sets = 512,
.partitions = 1,
.line_size = 64,
.processor_start = big_cluster_core_count,
.processor_count = processor_count - big_cluster_core_count,
};
clusters[1] = (struct cpuinfo_cluster) {
.processor_start = big_cluster_core_count,
.processor_count = processor_count - big_cluster_core_count,
.core_start = big_cluster_core_count,
.core_count = processor_count - big_cluster_core_count,
.cluster_id = 1,
.package = &static_package,
.vendor = cpuinfo_vendor_unknown,
.uarch = cpuinfo_uarch_unknown,
.frequency = 0,
};
}
}
/* Commit changes */
cpuinfo_cache[cpuinfo_cache_level_1i] = l1i;
cpuinfo_cache[cpuinfo_cache_level_1d] = l1d;
cpuinfo_cache[cpuinfo_cache_level_2] = l2;
if (is_x86) {
cpuinfo_cache[cpuinfo_cache_level_3] = &static_x86_l3;
}
cpuinfo_processors = processors;
cpuinfo_cores = cores;
cpuinfo_clusters = clusters;
cpuinfo_packages = &static_package;
cpuinfo_cache_count[cpuinfo_cache_level_1i] = processor_count;
cpuinfo_cache_count[cpuinfo_cache_level_1d] = processor_count;
cpuinfo_cache_count[cpuinfo_cache_level_2] = l2_count;
if (is_x86) {
cpuinfo_cache_count[cpuinfo_cache_level_3] = 1;
}
cpuinfo_global_uarch = (struct cpuinfo_uarch_info) {
.uarch = cpuinfo_uarch_unknown,
.processor_count = processor_count,
.core_count = core_count,
};
cpuinfo_processors_count = processor_count;
cpuinfo_cores_count = processor_count;
cpuinfo_clusters_count = cluster_count;
cpuinfo_packages_count = 1;
cpuinfo_max_cache_size = is_x86 ? 128 * 1024 * 1024 : 8 * 1024 * 1024;
cpuinfo_is_initialized = true;
processors = NULL;
cores = NULL;
clusters = NULL;
l1i = l1d = l2 = NULL;
cleanup:
free(processors);
free(cores);
free(clusters);
free(l1i);
free(l1d);
free(l2);
}
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