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| author | jhb <jhb@FreeBSD.org> | 2003-01-08 01:23:16 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2003-01-08 01:23:16 +0000 |
| commit | a331d8e0375791cf9ad202823d8afdc3dc4d02ba (patch) | |
| tree | c34d3114b7f3f8befe7b024b64358c323634cb2c /sys/i386 | |
| parent | 47dd2b5659fde33fa7fdcf59f85ef8bbc783d89a (diff) | |
| download | FreeBSD-src-a331d8e0375791cf9ad202823d8afdc3dc4d02ba.zip FreeBSD-src-a331d8e0375791cf9ad202823d8afdc3dc4d02ba.tar.gz | |
If the boot processor supports hyperthreading and contains more than one
logical CPU, display the number of logical CPUs per physical processor
underneath the list of CPU features.
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/i386/identcpu.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/i386/i386/identcpu.c b/sys/i386/i386/identcpu.c index 59ed809..040fb6f 100644 --- a/sys/i386/i386/identcpu.c +++ b/sys/i386/i386/identcpu.c @@ -604,6 +604,15 @@ printcpuinfo(void) "\037IA64" /* CPU can execute IA64 instructions */ "\040PBE" /* Pending Break Enable */ ); + + /* + * If this CPU supports hyperthreading then mention + * the number of logical CPU's it contains. + */ + if (cpu_feature & CPUID_HTT && + (cpuid_cpuinfo & CPUID_HTT_CORES) > 0x100) + printf("\n Hyperthreading: %d logical CPUs", + (cpuid_cpuinfo & CPUID_HTT_CORES) >> 16); } if (strcmp(cpu_vendor, "AuthenticAMD") == 0 && nreg >= 0x80000001) |
