<div dir="ltr"><font color="#500050" face="arial, sans-serif">Hi all:</font><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px"><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">    Can anybody help me to understand the usage of &#39;shared_cpu_map&#39; in</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">/sys/devices/system/cpu/cpuX/</span><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">cache/indexX/.</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">    </span><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">when I execute the cmd--&#39;#cat shared_cpu_map&#39;, it retures &#39;05&#39;.</span><div>
<span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">     And my computer use Ubuntu12.04,Intel core i3 CPU.</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px"><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">     I have read one email in LKML,it says:</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">
<br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px"><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">&quot;The patch also adds a bunch of interfaces under</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">/sys/devices/system/cpu/cpuX/</span><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">cache, showing various information about the</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">caches.  Most useful field being shared_cpu_map, which says what caches are</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">shared among which logical cpus. &quot;</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px"><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">     But I still cannot catch the meaning of  &#39;which says what caches</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">are shared among which logical cpus&#39;.</span><br style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px"><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:13px">     Thanks. </span> <br>
-- <br><div dir="ltr">Sincerely,<div>Ren Zhen</div></div>
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