<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 20 Oct 2011, at 08:47, Galder Zamarreņo wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div><blockquote type="cite"><blockquote type="cite"><br class="Apple-interchange-newline">Why are we preferring to provide more cache misses && slower<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">performance, to fake a slightly better precision in eviction?<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">I guess this is the main question, how much worse would the eviction<br></blockquote><blockquote type="cite">precision be if we only relied on the periodic eviction thread?<br></blockquote><br>We did use to have a periodic eviction thread in the JBoss Cache days, but that used to cause us problems since we queued events to the cache in order to apply eviction algorithms.<br></div></span></blockquote><div><br></div><div>That was a different case. In JBC we picked nodes for eviction and put them on an eviction queue and they were analysed periodically. That queue became a bottleneck. </div><div><br></div><div>The suggestion here is to essentially cache time lookups so that you don't call System.cTM() all the time. See Elias Ross' parallel post to this list about Netty's HashedWheelTimer. </div><div><br></div><div>Sanne, I recall your creating a JIRA for this?</div><div><br></div></div><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div><div>--</div><div>Manik Surtani</div><div><a href="mailto:manik@jboss.org">manik@jboss.org</a></div><div><a href="http://twitter.com/maniksurtani">twitter.com/maniksurtani</a></div><div><br></div><div>Lead, Infinispan</div><div><a href="http://www.infinispan.org">http://www.infinispan.org</a></div><div><br></div></div></span><br class="Apple-interchange-newline">
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