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[tor-bugs] #14056 [Tor]: IPredator complains that we call time() too much when running over 500Mbps

#14056: IPredator complains that we call time() too much when running over 500Mbps
-----------------------------------------+---------------------------------
 Reporter:  teor                         |          Owner:
     Type:  defect                       |         Status:  new
 Priority:  normal                       |      Milestone:  Tor:
Component:  Tor                          |  0.2.6.x-final
 Keywords:  performance tor-relay lorax  |        Version:  Tor: 0.2.5.10
Parent ID:                               |  Actual Points:
                                         |         Points:
-----------------------------------------+---------------------------------
 IPredator writes:
 >We are constantly testing kernel 3.x vs. the latest 2.6, but noticed
 that with kernel 3.x beyond 500MBit Tor would spend massive amounts of
 CPU time on calling time(). On kernel 2.6 we use kernel.vsyscall64=2
 which minimizes the impact of constantly doing that.

 https://ipredator.se/guide/torserver#performance
 (JavaScript may be required, unfortunately.)

 nickm, is this still an issue?
 This would be possible to simulate using chutney, right?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/14056>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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