mirror of
https://github.com/xmrig/xmrig.git
synced 2024-11-18 00:37:46 +00:00
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/* XMRig
|
|
* Copyright 2010 Jeff Garzik <jgarzik@pobox.com>
|
|
* Copyright 2012-2014 pooler <pooler@litecoinpool.org>
|
|
* Copyright 2014 Lucas Jones <https://github.com/lucasjones>
|
|
* Copyright 2014-2016 Wolf9466 <https://github.com/OhGodAPet>
|
|
* Copyright 2016 Jay D Dee <jayddee246@gmail.com>
|
|
* Copyright 2016-2017 XMRig <support@xmrig.com>
|
|
*
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <cpuid.h>
|
|
#include <string.h>
|
|
#include <stdbool.h>
|
|
#include <math.h>
|
|
|
|
#ifndef BUILD_TEST
|
|
# include <libcpuid.h>
|
|
#endif
|
|
|
|
#include "cpu.h"
|
|
|
|
|
|
#ifndef BUILD_TEST
|
|
void cpu_init_common() {
|
|
struct cpu_raw_data_t raw = { 0 };
|
|
struct cpu_id_t data = { 0 };
|
|
|
|
cpuid_get_raw_data(&raw);
|
|
cpu_identify(&raw, &data);
|
|
|
|
strncpy(cpu_info.brand, data.brand_str, sizeof(cpu_info.brand) - 1);
|
|
|
|
cpu_info.total_logical_cpus = data.total_logical_cpus;
|
|
cpu_info.sockets = data.total_logical_cpus / data.num_logical_cpus;
|
|
cpu_info.total_cores = data.num_cores * cpu_info.sockets;
|
|
cpu_info.l3_cache = data.l3_cache > 0 ? data.l3_cache * cpu_info.sockets : 0;
|
|
|
|
// Workaround for AMD CPUs https://github.com/anrieff/libcpuid/issues/97
|
|
if (data.vendor == VENDOR_AMD && data.l3_cache <= 0 && data.l2_assoc == 16 && data.ext_family >= 21) {
|
|
cpu_info.l2_cache = data.l2_cache * (cpu_info.total_cores / 2) * cpu_info.sockets;
|
|
}
|
|
else {
|
|
cpu_info.l2_cache = data.l2_cache > 0 ? data.l2_cache * cpu_info.total_cores * cpu_info.sockets : 0;
|
|
}
|
|
|
|
|
|
# ifdef __x86_64__
|
|
cpu_info.flags |= CPU_FLAG_X86_64;
|
|
# endif
|
|
|
|
if (data.flags[CPU_FEATURE_AES]) {
|
|
cpu_info.flags |= CPU_FLAG_AES;
|
|
}
|
|
|
|
if (data.flags[CPU_FEATURE_BMI2]) {
|
|
cpu_info.flags |= CPU_FLAG_BMI2;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
int get_optimal_threads_count(int algo, bool double_hash, int max_cpu_usage) {
|
|
if (cpu_info.total_logical_cpus == 1) {
|
|
return 1;
|
|
}
|
|
|
|
int cache = cpu_info.l3_cache ? cpu_info.l3_cache : cpu_info.l2_cache;
|
|
int count = 0;
|
|
const int size = (algo ? 1024 : 2048) * (double_hash ? 2 : 1);
|
|
|
|
if (cache) {
|
|
count = cache / size;
|
|
}
|
|
else {
|
|
count = cpu_info.total_logical_cpus / 2;
|
|
}
|
|
|
|
if (count > cpu_info.total_logical_cpus) {
|
|
count = cpu_info.total_logical_cpus;
|
|
}
|
|
|
|
if (((float) count / cpu_info.total_logical_cpus * 100) > max_cpu_usage) {
|
|
count = ceil((float) cpu_info.total_logical_cpus * (max_cpu_usage / 100.0));
|
|
}
|
|
|
|
return count < 1 ? 1 : count;
|
|
}
|