Date: Fri, 9 Nov 2007 16:09:06 -0800 From: "Matt Reimer" <mattjreimer@gmail.com> To: net@freebsd.org Subject: Should syncache.count ever be negative? Message-ID: <f383264b0711091609n81875b6v444055960ab0fd96@mail.gmail.com>
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On a eight core machine running RELENG_7 I'm seeing TCP stalls, sometimes lasting up to 60 seconds or so. While trying to track this down I noticed that net.inet.tcp.syncache.count is negative. Should it be possible for the count to go negative? Perhaps it indicates a race, or the counter is wrongly being decremented twice? Matt # sysctl net.inet.tcp.syncache net.inet.tcp.syncache.rst_on_sock_fail: 1 net.inet.tcp.syncache.rexmtlimit: 3 net.inet.tcp.syncache.hashsize: 512 net.inet.tcp.syncache.count: -97 net.inet.tcp.syncache.cachelimit: 15360 net.inet.tcp.syncache.bucketlimit: 30
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