topo1.xml : 1 sockets, 4 core x2 THREAD

<groups>
 <group level="1" cache-level="3">
  <cpu count="8" mask="ff,0,0,0">0, 1, 2, 3, 4, 5, 6, 7</cpu>
  <children>
   <group level="2" cache-level="2">
    <cpu count="2" mask="3,0,0,0">0, 1</cpu>
    <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
   </group>
   <group level="2" cache-level="2">
    <cpu count="2" mask="c,0,0,0">2, 3</cpu>
    <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
   </group>
   <group level="2" cache-level="2">
    <cpu count="2" mask="30,0,0,0">4, 5</cpu>
    <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
   </group>
   <group level="2" cache-level="2">
    <cpu count="2" mask="c0,0,0,0">6, 7</cpu>
    <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
   </group>
  </children>
 </group>
</groups>


topo2.xml:
 2 package(s) x 4 core(s) x 2 hardware threads

<groups>
 <group level="1" cache-level="0">
  <cpu count="16" mask="ffff,0,0,0">0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15</cpu>
  <children>
   <group level="2" cache-level="3">
    <cpu count="8" mask="ff,0,0,0">0, 1, 2, 3, 4, 5, 6, 7</cpu>
    <children>
     <group level="3" cache-level="2">
      <cpu count="2" mask="3,0,0,0">0, 1</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
     </group>
     <group level="3" cache-level="2">
      <cpu count="2" mask="c,0,0,0">2, 3</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
     </group>
     <group level="3" cache-level="2">
      <cpu count="2" mask="30,0,0,0">4, 5</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
     </group>
     <group level="3" cache-level="2">
      <cpu count="2" mask="c0,0,0,0">6, 7</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
     </group>
    </children>
   </group>
   <group level="2" cache-level="3">
    <cpu count="8" mask="ff00,0,0,0">8, 9, 10, 11, 12, 13, 14, 15</cpu>
    <children>
     <group level="3" cache-level="2">
      <cpu count="2" mask="300,0,0,0">8, 9</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
     </group>
     <group level="3" cache-level="2">
      <cpu count="2" mask="c00,0,0,0">10, 11</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
     </group>
     <group level="3" cache-level="2">
      <cpu count="2" mask="3000,0,0,0">12, 13</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
     </group>
     <group level="3" cache-level="2">
      <cpu count="2" mask="c000,0,0,0">14, 15</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
     </group>
    </children>
   </group>
  </children>
 </group>
</groups>