diff --git a/bindings/SigarWrapper.pm b/bindings/SigarWrapper.pm
index 7790c704..aef1edc5 100644
--- a/bindings/SigarWrapper.pm
+++ b/bindings/SigarWrapper.pm
@@ -509,6 +509,10 @@ use vars qw(%classes %cmds);
 	  name => 'total_sockets', type => 'Int',
 	  desc => 'Total CPU sockets (physical)',
       },
+      {
+	  name => 'cores_per_socket', type => 'Int',
+	  desc => 'Number of CPU cores per CPU socket',
+      },
     ],
     Uptime => [
       {
diff --git a/bindings/java/src/org/hyperic/sigar/cmd/CpuInfo.java b/bindings/java/src/org/hyperic/sigar/cmd/CpuInfo.java
index ddf8f397..901a006b 100644
--- a/bindings/java/src/org/hyperic/sigar/cmd/CpuInfo.java
+++ b/bindings/java/src/org/hyperic/sigar/cmd/CpuInfo.java
@@ -66,6 +66,7 @@ public class CpuInfo extends SigarCommandBase {
         println("Total CPUs....." + info.getTotalCores());
         if (info.getTotalCores() != info.getTotalSockets()) {
             println("Physical CPUs.." + info.getTotalSockets());
+            println("Cores per CPU.." + info.getCoresPerSocket());
         }
 
         if (cacheSize != Sigar.FIELD_NOTIMPL) {
diff --git a/include/sigar.h b/include/sigar.h
index 0011daf4..79d0a20e 100644
--- a/include/sigar.h
+++ b/include/sigar.h
@@ -188,6 +188,7 @@ typedef struct {
     sigar_uint64_t cache_size;
     int total_sockets;
     int total_cores;
+    int cores_per_socket;
 } sigar_cpu_info_t;
 
 typedef struct {
diff --git a/src/os/aix/aix_sigar.c b/src/os/aix/aix_sigar.c
index 755fc1f6..39be11cc 100644
--- a/src/os/aix/aix_sigar.c
+++ b/src/os/aix/aix_sigar.c
@@ -1987,8 +1987,9 @@ int sigar_cpu_info_list_get(sigar_t *sigar,
 
         info = &cpu_infos->data[cpu_infos->number++];        
 
-        info->total_sockets = ncpu;
         info->total_cores = ncpu;
+        info->cores_per_socket = 1; /*XXX*/
+        info->total_sockets = ncpu; /*XXX*/
 
         info->cache_size = SIGAR_CPU_CACHE_SIZE;
 
diff --git a/src/os/darwin/darwin_sigar.c b/src/os/darwin/darwin_sigar.c
index defb2267..7c8ba9da 100644
--- a/src/os/darwin/darwin_sigar.c
+++ b/src/os/darwin/darwin_sigar.c
@@ -2132,6 +2132,7 @@ int sigar_cpu_info_list_get(sigar_t *sigar,
         info->mhz = mhz;
         info->cache_size = cache_size;
         info->total_cores = sigar->ncpu;
+        info->cores_per_socket = sigar->lcpu;
         info->total_sockets = sigar_cpu_socket_count(sigar);
     }
 
diff --git a/src/os/hpux/hpux_sigar.c b/src/os/hpux/hpux_sigar.c
index 1dffd1e4..0a149202 100644
--- a/src/os/hpux/hpux_sigar.c
+++ b/src/os/hpux/hpux_sigar.c
@@ -679,8 +679,9 @@ int sigar_cpu_info_list_get(sigar_t *sigar,
 
         info = &cpu_infos->data[cpu_infos->number++];
 
-        info->total_sockets = sigar->ncpu;
         info->total_cores = sigar->ncpu;
+        info->cores_per_socket = 1; /*XXX*/
+        info->total_sockets = sigar->ncpu; /*XXX*/
 
 #ifdef __ia64__
         SIGAR_SSTRCPY(info->vendor, "Intel"); /*XXX*/
diff --git a/src/os/linux/linux_sigar.c b/src/os/linux/linux_sigar.c
index a3e75a5e..a3b353d6 100644
--- a/src/os/linux/linux_sigar.c
+++ b/src/os/linux/linux_sigar.c
@@ -1589,8 +1589,10 @@ int sigar_cpu_info_list_get(sigar_t *sigar,
 
         cpu_info = &cpu_infos->data[cpu_infos->number];
         get_cpuinfo_max_freq(cpu_info, cpu_infos->number);
+
+        cpu_info->total_cores = sigar->ncpu;
+        info->cores_per_socket = sigar->lcpu;
         cpu_info->total_sockets = sigar_cpu_socket_count(sigar);
-        cpu_info->total_cores   = sigar->ncpu;
 
         ++cpu_infos->number;
         SIGAR_CPU_INFO_LIST_GROW(cpu_infos);
diff --git a/src/os/solaris/solaris_sigar.c b/src/os/solaris/solaris_sigar.c
index e51b214f..802a8ea6 100644
--- a/src/os/solaris/solaris_sigar.c
+++ b/src/os/solaris/solaris_sigar.c
@@ -1799,6 +1799,7 @@ int sigar_cpu_info_list_get(sigar_t *sigar,
         sigar_cpu_info_t *info = &cpu_infos->data[i];
         info->total_sockets = nsockets;
         info->total_cores = sigar->ncpu;
+        info->cores_per_socket = sigar->ncpu / nsockets;
     }
 
     return SIGAR_OK;
diff --git a/src/os/win32/win32_sigar.c b/src/os/win32/win32_sigar.c
index 151e51aa..f56a5b73 100644
--- a/src/os/win32/win32_sigar.c
+++ b/src/os/win32/win32_sigar.c
@@ -2005,8 +2005,9 @@ static int sigar_cpu_info_get(sigar_t *sigar, sigar_cpu_info_t *info)
     RegCloseKey(key);
     RegCloseKey(cpu);
 
+    info->total_cores = sigar->ncpu;
+    info->cores_per_socket = sigar->lcpu;
     info->total_sockets = sigar_cpu_socket_count(sigar);
-    info->total_cores   = sigar->ncpu;
 
     return SIGAR_OK;
 }