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| author | Ilya Maximets <i.maximets@samsung.com> | 2018-10-11 15:06:44 +0300 |
|---|---|---|
| committer | Ian Stokes <ian.stokes@intel.com> | 2018-10-12 15:22:54 +0100 |
| commit | 6794be1deea818f21eae0a6b24c96ec5650ba758 (patch) | |
| tree | 9303bd7632f4d2491ec391dc4fa86a166d0c4c4c /vswitchd | |
| parent | 21e9b77b885d4a147d8e04bdcb0e560a7258abdd (diff) | |
| download | openvswitch-6794be1deea818f21eae0a6b24c96ec5650ba758.tar.gz | |
dpif-netdev-perf: Clarify frequency number.
'dpif-netdev/pmd-perf-show' command prints the frequency number
calculated from the total number of cycles spent for iterations
for the measured period. This number could be confusing, because
users may think that it should be equal to CPU frequency, especially
on non-x86 systems where TSC frequency likely does not match with
CPU one.
Moreover, counted TSC cycles could differ from the HW TSC cycles
in case of a large number of PMD reloads, because cycles spent
outside of the main polling loop are not taken into account anywhere.
In this case the frequency will not match even TSC frequency.
Let's clarify the meaning in order to avoid this misunderstanding.
'Cycles' replaced with 'Used TSC cycles', which describes how many TSC
cycles consumed by the main polling loop. % of the total TSC cycles
now printed instead of GHz frequency, because GHz is unclear for
understanding, especially without knowing the exact TSC frequency.
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
Diffstat (limited to 'vswitchd')
| -rw-r--r-- | vswitchd/ovs-vswitchd.8.in | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/vswitchd/ovs-vswitchd.8.in b/vswitchd/ovs-vswitchd.8.in index e39d158d5..901f75e6f 100644 --- a/vswitchd/ovs-vswitchd.8.in +++ b/vswitchd/ovs-vswitchd.8.in @@ -1,9 +1,5 @@ .\" -*- nroff -*- -.de IQ -. br -. ns -. IP "\\$1" -.. +.so lib/ovs.tmac .TH ovs\-vswitchd 8 "@VERSION@" "Open vSwitch" "Open vSwitch Manual" .\" This program's name: .ds PN ovs\-vswitchd |