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proper check if HT is enabled

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This commit is contained in:
Doug MacEachern 2006-03-03 02:01:19 +00:00
parent 34f39da4d3
commit 7250cfe937
1 changed files with 15 additions and 0 deletions
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15
src/os/linux/linux_sigar.c
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@ -216,8 +216,23 @@ static int is_ht_enabled(sigar_t *sigar)
sigar_cpuid(1, &eax, &ebx, &ecx, &edx);
if (edx & (1<<28)) {
unsigned long apic_id =
(ebx & 0xFF000000) >> 24;
unsigned long log_id, phy_id_mask=0xFF, i=1;
sigar->lcpu = (ebx & 0x00FF0000) >> 16;
while (i < sigar->lcpu) {
i *= 2;
phy_id_mask <<= 1;
}
log_id = apic_id & ~phy_id_mask;
if (log_id == 0) {
sigar->lcpu = 1;
}
if (sigar->lcpu > 1) {
sigar->ht_enabled = 1;
sigar_log_printf(sigar, SIGAR_LOG_DEBUG,