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Dont fetch if smt is enabled if its not supported (AMD). Dont guess cache topology, fetch it from CPUID (AMD)

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Dr-Noob
2020-09-01 13:08:44 +02:00
parent 5cca6df218
commit 877833db0a
2 changed files with 75 additions and 38 deletions
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111
src/cpuid.c
View File

@@ -59,17 +59,6 @@ void init_cpu_info(struct cpuInfo* cpu) {
cpu->AES = false;
cpu->SHA = false;
}
/*
void init_topology_struct(struct topology* topo, struct cache* cach) {
(*topo)->total_cores = 0;
(*topo)->physical_cores = 0;
(*topo)->logical_cores = 0;
(*topo)->smt_available = 0;
(*topo)->smt_supported = 0;
(*topo)->sockets = 0;
(*topo)->apic = malloc(sizeof(struct apic));
(*topo)->cach = cach;
}*/
void init_topology_struct(struct topology* topo, struct cache* cach) {
topo->total_cores = 0;
@@ -282,34 +271,79 @@ struct cpuInfo* get_cpu_info() {
return cpu;
}
uint8_t get_number_llc_amd(struct topology* topo) {
uint32_t eax = 0x8000001D;
uint32_t ebx = 0;
uint32_t ecx = 3; // LLC Level
uint32_t edx = 0;
uint32_t num_sharing_cache = 0;
cpuid(&eax, &ebx, &ecx, &edx);
num_sharing_cache = ((eax >> 14) & 0xFFF) + 1;
return topo->logical_cores / num_sharing_cache;
}
void guess_cache_topology_amd(struct cpuInfo* cpu, struct topology* topo) {
topo->cach->L1i->num_caches = topo->physical_cores;
topo->cach->L1d->num_caches = topo->physical_cores;
topo->cach->L2->num_caches = topo->physical_cores;
if(topo->cach->L3->exists) {
if(cpu->maxExtendedLevels >= 0x8000001D) {
topo->cach->L3->num_caches = get_number_llc_amd(topo);
bool get_cache_topology_amd(struct cpuInfo* cpu, struct topology* topo) {
if(cpu->maxExtendedLevels >= 0x8000001D) {
uint32_t i, eax, ebx, ecx, edx, num_sharing_cache, cache_type, cache_level;
i = 0;
do {
eax = 0x8000001D;
ebx = 0;
ecx = i; // cache id
edx = 0;
cpuid(&eax, &ebx, &ecx, &edx);
cache_type = eax & 0x1F;
if(cache_type > 0) {
num_sharing_cache = ((eax >> 14) & 0xFFF) + 1;
cache_level = (eax >>= 5) & 0x7;
switch (cache_type) {
case 1: // Data Cache (We assume this is L1d)
if(cache_level != 1) {
printBug("Found data cache at level %d (expected 1)", cache_level);
return false;
}
topo->cach->L1d->num_caches = topo->logical_cores / num_sharing_cache;
break;
case 2: // Instruction Cache (We assume this is L1i)
if(cache_level != 1) {
printBug("Found instruction cache at level %d (expected 1)", cache_level);
return false;
}
topo->cach->L1i->num_caches = topo->logical_cores / num_sharing_cache;
break;
case 3: // Unified Cache (This may be L2 or L3)
if(cache_level == 2) {
topo->cach->L2->num_caches = topo->logical_cores / num_sharing_cache;
}
else if(cache_level == 3) {
topo->cach->L3->num_caches = topo->logical_cores / num_sharing_cache;
}
else {
printBug("Found unified cache at level %d (expected == 2 or 3)", cache_level);
return false;
}
break;
default: // Unknown Type Cache
printBug("Unknown Type Cache found at ID %d", i);
return false;
}
}
i++;
} while (cache_type > 0);
}
else {
printWarn("Can't read topology information from cpuid (needed extended level is 0x%.8X, max is 0x%.8X). Guessing cache sizes", 0x8000001D, cpu->maxExtendedLevels);
topo->cach->L1i->num_caches = topo->physical_cores;
topo->cach->L1d->num_caches = topo->physical_cores;
if(topo->cach->L3->exists) {
topo->cach->L2->num_caches = topo->physical_cores;
topo->cach->L3->num_caches = 1;
}
else {
printWarn("Can't read topology information from cpuid (needed extended level is 0x%.8X, max is 0x%.8X)", 0x8000001D, cpu->maxExtendedLevels);
topo->cach->L3->num_caches = 1;
topo->cach->L2->num_caches = 1;
}
}
return true;
}
// Main reference: https://software.intel.com/content/www/us/en/develop/articles/intel-64-architecture-processor-topology-enumeration.html
@@ -375,7 +409,10 @@ struct topology* get_topology_info(struct cpuInfo* cpu, struct cache* cach) {
}
if (cpu->maxLevels >= 0x00000001) {
topo->smt_available = is_smt_enabled_amd(topo);
if(topo->smt_supported > 1)
topo->smt_available = is_smt_enabled_amd(topo);
else
topo->smt_available = 1;
}
else {
printWarn("Can't read topology information from cpuid (needed level is 0x%.8X, max is 0x%.8X)", 0x0000000B, cpu->maxLevels);
@@ -388,7 +425,7 @@ struct topology* get_topology_info(struct cpuInfo* cpu, struct cache* cach) {
else
topo->sockets = topo->total_cores / topo->physical_cores;
guess_cache_topology_amd(cpu, topo);
get_cache_topology_amd(cpu, topo);
break;

2
src/main.c
View File

@@ -6,7 +6,7 @@
#include "cpuid.h"
#include "global.h"
static const char* VERSION = "0.66";
static const char* VERSION = "0.67";
void print_help(char *argv[]) {
printf("Usage: %s [--version] [--help] [--levels] [--style \"fancy\"|\"retro\"|\"legacy\"] [--color \"intel\"|\"amd\"|'R,G,B:R,G,B:R,G,B:R,G,B']\n\n\