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[v1.02][x86] Extending peakperf computation to hybid cores

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Dr-Noob
2022-11-05 18:17:38 +00:00
parent cec91a1e4d
commit 1eb1a5246e
2 changed files with 50 additions and 39 deletions
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88
src/x86/cpuid.c
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@@ -179,7 +179,7 @@ struct uarch* get_cpu_uarch(struct cpuInfo* cpu) {
return get_uarch_from_cpuid(cpu, eax, efamily, family, emodel, model, (int)stepping);
}
int64_t get_peak_performance(struct cpuInfo* cpu, struct topology* topo, int64_t max_freq, bool accurate_pp) {
int64_t get_peak_performance(struct cpuInfo* cpu, bool accurate_pp) {
/*
* PP = PeakPerformance
* SP = SinglePrecision
@@ -192,46 +192,56 @@ int64_t get_peak_performance(struct cpuInfo* cpu, struct topology* topo, int64_t
* 16(If AVX512), 8(If AVX), 4(If SSE) *
*/
int64_t freq;
#ifdef __linux__
if(accurate_pp)
freq = measure_frequency(cpu);
else
freq = max_freq;
#else
// Silence compiler warning
(void)(accurate_pp);
freq = max_freq;
#endif
struct cpuInfo* ptr = cpu;
int64_t total_flops = 0;
//First, check we have consistent data
if(freq == UNKNOWN_DATA || topo->logical_cores == UNKNOWN_DATA) {
return -1;
for(int i=0; i < cpu->num_cpus; ptr = ptr->next_cpu, i++) {
struct topology* topo = ptr->topo;
int64_t max_freq = get_freq(ptr->freq);
int64_t freq;
#ifdef __linux__
if(accurate_pp)
freq = measure_frequency(ptr);
else
freq = max_freq;
#else
// Silence compiler warning
(void)(accurate_pp);
freq = max_freq;
#endif
//First, check we have consistent data
if(freq == UNKNOWN_DATA || topo->logical_cores == UNKNOWN_DATA) {
return -1;
}
struct features* feat = ptr->feat;
int vpus = get_number_of_vpus(ptr);
int64_t flops = topo->physical_cores * topo->sockets * (freq*1000000) * vpus;
if(feat->FMA3 || feat->FMA4)
flops = flops*2;
// Ice Lake has AVX512, but it has 1 VPU for AVX512, while
// it has 2 for AVX2. If this is a Ice Lake CPU, we are computing
// the peak performance supposing AVX2, not AVX512
if(feat->AVX512 && vpus_are_AVX512(ptr))
flops = flops*16;
else if(feat->AVX || feat->AVX2)
flops = flops*8;
else if(feat->SSE)
flops = flops*4;
// See https://sites.utexas.edu/jdm4372/2018/01/22/a-peculiar-
// throughput-limitation-on-intels-xeon-phi-x200-knights-landing/
if(is_knights_landing(ptr))
flops = flops * 6 / 7;
total_flops += flops;
}
struct features* feat = cpu->feat;
int vpus = get_number_of_vpus(cpu);
int64_t flops = topo->physical_cores * topo->sockets * (freq*1000000) * vpus;
if(feat->FMA3 || feat->FMA4)
flops = flops*2;
// Ice Lake has AVX512, but it has 1 VPU for AVX512, while
// it has 2 for AVX2. If this is a Ice Lake CPU, we are computing
// the peak performance supposing AVX2, not AVX512
if(feat->AVX512 && vpus_are_AVX512(cpu))
flops = flops*16;
else if(feat->AVX || feat->AVX2)
flops = flops*8;
else if(feat->SSE)
flops = flops*4;
// See https://sites.utexas.edu/jdm4372/2018/01/22/a-peculiar-
// throughput-limitation-on-intels-xeon-phi-x200-knights-landing/
if(is_knights_landing(cpu))
flops = flops * 6 / 7;
return flops;
return total_flops;
}
struct hypervisor* get_hp_info(bool hv_present) {
@@ -498,7 +508,7 @@ struct cpuInfo* get_cpu_info() {
}
cpu->num_cpus = modules;
cpu->peak_performance = get_peak_performance(cpu, cpu->topo, get_freq(cpu->freq), accurate_pp());
cpu->peak_performance = get_peak_performance(cpu, accurate_pp());
return cpu;
}