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Message-Id: <20120722.124248.1156716792541498634.davem@davemloft.net> Date: Sun, 22 Jul 2012 12:42:48 -0700 (PDT) From: David Miller <davem@...emloft.net> To: subramanian.vijay@...il.com Cc: netdev@...r.kernel.org Subject: Re: [PATCH 00/16] Remove the ipv4 routing cache From: Vijay Subramanian <subramanian.vijay@...il.com> Date: Sun, 22 Jul 2012 00:47:27 -0700 > I have been running your routing removal patches for the past 3 days > (upgraded yesterday to latest set including the 17th patch you sent in > response to Eric's comment) and have not seen any issues (crashes > etc). Thanks for testing. > Apart from time spent in fib_table_lookup(), it seems time is also > spent in check_leaf(). I assume this is expected behavior. > Here are 2 sample perf outputs (I have appended the kbench outputs to > each file) Yes, the two biggest hogs will be fib_table_lookup() and check_leaf(). check_leaf() is expensive largely because that's where we write the fib_result block, which is a structure on the fib_lookup() caller's stack. Your perf traces roughly approximate mine. Thanks. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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