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<p class="MsoNormal"><span style="color:#1F497D">Thanks Jason.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Jason Evans [mailto:jasone@canonware.com]
<br>
<b>Sent:</b> Tuesday, June 02, 2015 10:10 PM<br>
<b>To:</b> Mayank Kumar (mayankum)<br>
<b>Cc:</b> jemalloc-discuss@canonware.com<br>
<b>Subject:</b> Re: interpretation of malloc_stats_print() output<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On Jun 2, 2015, at 11:25 AM, Mayank Kumar (mayankum) <<a href="mailto:mayankum@cisco.com">mayankum@cisco.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am trying to match output from malloc_stats with output from top and also trying to figure out total process virtual memory usage from stats.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">What fields in the stats should be added to get the total virtual memory for my process ?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">For the version of jemalloc you're using, virtual memory can be computed by multiplying the number of chunks times the chunk size -- 396 MiB in this case.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Also is this link an accurate measurement of fragmentation for my process?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a href="http://jemalloc.net/mailman/jemalloc-discuss/2014-April/000766.html">http://jemalloc.net/mailman/jemalloc-discuss/2014-April/000766.html</a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">from the link it seems active should be less than allocated, but I see otherwise. Is there a documentation somewhere to decipher this interesting output from jemalloc stats ?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The jemalloc manual documents all the statistics:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span class="apple-tab-span"> </span><a href="http://www.canonware.com/download/jemalloc/jemalloc-latest/doc/jemalloc.html">http://www.canonware.com/download/jemalloc/jemalloc-latest/doc/jemalloc.html</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">CPUs: 2<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Arenas: 8<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Pointer size: 4<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Quantum size: 16<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Page size: 4096<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Min active:dirty page ratio per arena: 8:1<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Maximum thread-cached size class: 32768<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Chunk size: >>>4194304<<< (2^22)<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Allocated: 251363184, active: 270594048, mapped: 415236096<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Current active ceiling: 1488977920<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">chunks: nchunks highchunks curchunks<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> 100 99 >>>99<<<<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">huge: nmalloc ndalloc allocated<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> 0 0 0<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> [...]<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Jason<o:p></o:p></p>
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