Solarflare
Server
Adapter
User
Guide
Solarflare
Adapters
on
Windows
Issue
20
©
Solarflare
Communications
2017
239
•
Processor
Turbo
mode
•
Ultra
Low
Power
State
•
PCIe
Active
State
Power
Management
(ASPM)
•
Unnecessary
SMM/SMI
features
The
latency
can
be
improved
by
selecting
the
highest
performance
power
plan:
•
Consider
using
the
Optimum
performance
power
plan
added
by
the
Solarflare
driver
package
installer,
which:
‐
Disables
all
CPU
idle
states
‐
Sets
the
OS
device
idle
policy
to
favor
performance
over
power
savings
‐
Disables
PCIe
ASPM
(Active
State
Power
Management)
The
installer
does
not
enable
this
by
default
as,
on
certain
systems,
it
might
significantly
increase
energy
usage.
•
Otherwise,
select
the
Always
On
or
High
performance
power
plan.
The
power
plan
is
configured
from
the
Control
Panel
>
Hardware
>
Power
Options:
You
can
also
use
the
powercfg.exe
utility
that
is
installed
with
Windows:
•
List
all
power
schemes
in
the
current
user's
environment:
powercfg
/LIST
•
Make
the
specified
power
scheme
active
on
the
computer:
powercfg
/SETACTIVE
<GUID>
See
https://technet.microsoft.com/en