[ovs-git] [openvswitch/ovs] 384320: dpif-netdev-perf: Accurate cycle counter update

Ben Pfaff noreply at github.com
Thu Dec 5 19:17:41 UTC 2019

  Branch: refs/heads/master
  Home:   https://github.com/openvswitch/ovs
  Commit: 3843208ee019b8559dc02a01039b8d43cc4dac0b
  Author: Malvika Gupta <malvika.gupta at arm.com>
  Date:   2019-12-05 (Thu, 05 Dec 2019)

  Changed paths:
    M lib/dpif-netdev-perf.h

  Log Message:
  dpif-netdev-perf: Accurate cycle counter update

The accurate timing implementation in this patch gets the wall clock counter via
cntvct_el0 register access. This call is portable to all aarch64 architectures
and has been verified on an 64-bit arm server.

Suggested-by: Yanqin Wei <yanqin.wei at arm.com>
Reviewed-by: Ilya Maximets <i.maximets at ovn.org>
Signed-off-by: Malvika Gupta <malvika.gupta at arm.com>
Signed-off-by: Ben Pfaff <blp at ovn.org>

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