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add intel scalable thru emerald rapids and xeon 6 #918

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457fac7
add intel scalable thru emerald rapids
chillenb Feb 24, 2026
e91308a
icelake/emeraldrapids silver 2vpu and xeon 6
chillenb Feb 24, 2026
fc2b6b5
default to 2 vpu for unknown xeon
chillenb Feb 24, 2026
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60 changes: 54 additions & 6 deletions frame/base/bli_cpuid.c
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Original file line number Diff line number Diff line change
Expand Up @@ -934,17 +934,26 @@ int vpu_count( void )
char model_num[5];
int sku;

int is_gold = 0;
int is_slv = 0;

get_cpu_name( cpu_name );

if ( strstr( cpu_name, "Intel(R) Xeon(R)" ) != NULL )
{
if (( loc = strstr( cpu_name, "Platinum" ) ))
return 2;
if ( loc == NULL )
loc = strstr( cpu_name, "Gold" ); // 1 or 2, tested below
{
if (( loc = strstr( cpu_name, "Gold" ) )) // 1 or 2, tested below
is_gold = 1;
}
if ( loc == NULL )
{
if (( loc = strstr( cpu_name, "Silver" ) ))
return 1;
// Some >=3rd gen scalable Xeon have 2 vpus.
is_slv = 1;
}
if ( loc == NULL )
if (( loc = strstr( cpu_name, "Bronze" ) ))
return 1;
Expand Down Expand Up @@ -979,15 +988,54 @@ int vpu_count( void )
else if ( sku == 5122 ) return 2;
else if ( 6299 >= sku && sku >= 6200 ) return 2; // Cascade Lake Gold
else if ( 5299 >= sku && sku >= 5200 ) return 1; // Cascade Lake Gold
else if ( 5199 >= sku && sku >= 5100 ) return 1;
else if ( 4199 >= sku && sku >= 4100 ) return 1;
else if ( 3199 >= sku && sku >= 3100 ) return 1;
else if ( 4299 >= sku && sku >= 4200 ) return 1; // Cascade Lake Silver
else if ( 5199 >= sku && sku >= 5100 ) return 1; // Skylake Gold (1 VPU)
else if ( 4199 >= sku && sku >= 4100 ) return 1; // Skylake Silver
else if ( 3199 >= sku && sku >= 3100 ) return 1; // Skylake Bronze
else if ( 3299 >= sku && sku >= 3200 ) return 2; // Cascade Lake W
else if ( 2299 >= sku && sku >= 2200 ) return 2; // Cascade Lake W
else if ( 2199 >= sku && sku >= 2120 ) return 2;
else if ( 2102 == sku || sku == 2104 ) return 2; // Gold exceptions
else if ( 2119 >= sku && sku >= 2100 ) return 1;
else return -1;

// 3rd gen Intel Scalable and W all have 2 vpus.
else if ( 8399 >= sku && sku >= 8300 ) return 2; // Ice Lake Platinum
else if ( 6399 >= sku && sku >= 6300 ) return 2; // Ice Lake Gold
// Some Intel Xeon 6 are in the 6300 range,
// but these do not have AVX512
else if ( 5399 >= sku && sku >= 5300 ) return 2; // Ice Lake Gold
else if ( 4399 >= sku && sku >= 4300 ) return 2; // Ice Lake Silver
else if ( 3399 >= sku && sku >= 3300 ) return 2; // Ice Lake W

// 4th gen Intel Scalable and W all have 2 vpus except 3408U
else if ( 8499 >= sku && sku >= 8400 ) return 2; // Sapphire Rapids Platinum
else if ( 6499 >= sku && sku >= 6400 ) return 2; // Sapphire Rapids Gold
else if ( 5499 >= sku && sku >= 5400 ) return 2; // Sapphire Rapids Gold
else if ( 4499 >= sku && sku >= 4400 ) return 2; // Sapphire Rapids Silver
else if ( sku == 3408 ) return 1;
else if ( 3499 >= sku && sku >= 3400 ) return 2; // Sapphire Rapids W


// 5th gen Intel Scalable all have 2 vpus except 3508U
else if ( 8599 >= sku && sku >= 8500 ) return 2; // Emerald Rapids Platinum
else if ( 6599 >= sku && sku >= 6500 && is_gold ) return 2; // Emerald Rapids Gold
else if ( 5599 >= sku && sku >= 5500 ) return 2; // Emerald Rapids Gold
else if ( 4599 >= sku && sku >= 4500 ) return 2; // Emerald Rapids Silver
else if ( sku == 3508 ) return 1;
else if ( 3599 >= sku && sku >= 3500 ) return 2; // Emerald Rapids W

// Intel Xeon 6 all seem to have 2 vpus.
// Note that the format string is different. No precious metals.

else if ( 6999 >= sku && sku >= 6900 ) return 2;
else if ( 6799 >= sku && sku >= 6700 ) return 2;
else if ( 6599 >= sku && sku >= 6500 && !(is_gold) ) return 2;
// Xeon 6 6300 series are AVX2-only.


else return 2;
// guess 2 vpus for unknown Xeons.

}
else if ( strstr( cpu_name, "Intel(R) Core(TM)" ) != NULL )
return 2; // All i7/i9 with avx512?
Expand Down