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Check if reported HTT cores are physical cores. This commit does not

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affect AMD CPUs at all because HTT bit is disabled earlier.  Intel
multicore CPUs and ULE scheduler may be affected.
This commit is contained in:
Jung-uk Kim 2006-04-25 00:06:37 +00:00
parent d94607de56
commit daea0aad84
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=158007
2 changed files with 16 additions and 0 deletions
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8
sys/amd64/amd64/mp_machdep.c
View File

@ -183,6 +183,7 @@ void
mp_topology(void)
{
struct cpu_group *group;
u_int regs[4];
int logical_cpus;
int apic_id;
int groups;
@ -195,6 +196,13 @@ mp_topology(void)
logical_cpus = (cpu_procinfo & CPUID_HTT_CORES) >> 16;
if (logical_cpus <= 1)
return;
/* Nothing to do if reported cores are physical cores. */
if (strcmp(cpu_vendor, "GenuineIntel") == 0 && cpu_high >= 4) {
cpuid_count(4, 0, regs);
if ((regs[0] & 0x1f) != 0 &&
logical_cpus <= ((regs[0] >> 26) & 0x3f) + 1)
return;
}
group = &mp_groups[0];
groups = 1;
for (cpu = 0, apic_id = 0; apic_id < MAXCPU; apic_id++) {

8
sys/i386/i386/mp_machdep.c
View File

@ -240,6 +240,7 @@ void
mp_topology(void)
{
struct cpu_group *group;
u_int regs[4];
int logical_cpus;
int apic_id;
int groups;
@ -252,6 +253,13 @@ mp_topology(void)
logical_cpus = (cpu_procinfo & CPUID_HTT_CORES) >> 16;
if (logical_cpus <= 1)
return;
/* Nothing to do if reported cores are physical cores. */
if (strcmp(cpu_vendor, "GenuineIntel") == 0 && cpu_high >= 4) {
cpuid_count(4, 0, regs);
if ((regs[0] & 0x1f) != 0 &&
logical_cpus <= ((regs[0] >> 26) & 0x3f) + 1)
return;
}
group = &mp_groups[0];
groups = 1;
for (cpu = 0, apic_id = 0; apic_id < MAXCPU; apic_id++) {