From a79bb600b9f021a69798aca83214644422219772 Mon Sep 17 00:00:00 2001
From: Doug MacEachern <dougm@hyperic.com>
Date: Wed, 11 Aug 2004 22:44:38 +0000
Subject: [PATCH] assume Xeon on redhat AS 2.1 is HT enabled

---
 src/os/linux/linux_sigar.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/os/linux/linux_sigar.c b/src/os/linux/linux_sigar.c
index ff9957a2..9cb2b755 100644
--- a/src/os/linux/linux_sigar.c
+++ b/src/os/linux/linux_sigar.c
@@ -1078,7 +1078,7 @@ int sigar_cpu_info_list_get(sigar_t *sigar,
                             sigar_cpu_info_list_t *cpu_infos)
 {
     FILE *fp;
-    int id;
+    int id, fake_id = -1;
     int cpu_id[36], cpu_ix=0;
     /* in the event that a box has > 36 cpus */
     int cpu_id_max = sizeof(cpu_id)/sizeof(int);
@@ -1093,6 +1093,8 @@ int sigar_cpu_info_list_get(sigar_t *sigar,
     memset(&cpu_id[0], -1, sizeof(cpu_id));
 
     while (get_cpu_info(sigar, &cpu_infos->data[cpu_infos->number], fp, &id)) {
+        fake_id++;
+
         if (id >= 0) {
             int i, fold=0;
             for (i=0; (i<cpu_ix) && (i<cpu_id_max); i++) {
@@ -1115,6 +1117,17 @@ int sigar_cpu_info_list_get(sigar_t *sigar,
                 }
             }
         }
+        else if (strEQ(cpu_infos->data[cpu_infos->number].model, "Xeon")) {
+            /* Redhat AS 2.1 /proc/cpuinfo does not have any of the
+             * attributes we use to detect hyperthreading, in this case
+             * if model Xeon, assume HT enabled.  FUCK IT.
+             */
+            if (fake_id % 2) {
+                sigar->ht_enabled = 1;
+                sigar->lcpu = 2; /* XXX assume 2 for now */
+                continue;
+            }
+        }
 
         ++cpu_infos->number;
         SIGAR_CPU_INFO_LIST_GROW(cpu_infos);