Table
3-5
Relationship
Between
the
CPU
Configuration
and
Number
of
Root
Complexes
Ordered
Only
for
Server
Ordered
for
CPU
Module
Ordered
Together
With
Server
(Mounting
at
Factory)
Ordered
Separately
From
Server
(Expansion
on
Site)
Without
I/O
Bus
Reconfiguration
With
I/O
Bus
Reconfiguration
Number
of
CPUs
1
2
2
2
Number
of
root
complexes
4
8
4
8
3.3
Relationship
Between
the
CPU
Configuration
and
Number
of
Root
Complexes
The
1-CPU
configuration
of
the
SPARC
M12-2S
consists
of
four
root
complexes,
and
the
2-CPU
configuration
consists
of
four
or
eight
root
complexes.
A
root
complex
consists
of
an
I/O
controller
mounted
on
a
processor
and
the
PCI
switches,
PCI
devices,
etc.
under
the
I/O
controller.
The
number
of
root
complexes
at
CPU
module
expansion
on
site
is
kept
at
the
default
value
of
4,
by
default.
In
this
case,
the
system
configuration
can
be
kept
as
is
since
the
I/O
bus
is
not
reconfigured,
but
the
PCI
card
mounting
rules
are
also
kept,
so
they
are
the
same
as
those
for
the
1-CPU
configuration.
To
change
the
number
of
root
complexes
to
eight,
the
system
administrator
needs
to
change
the
XSCF
settings
to
reconfigure
the
I/O
bus
reconfiguration.
For
details
on
the
setting
method,
see
the
man
page
for
the
setpparmode(8)
command
or
the
Fujitsu
SPARC
M12
and
Fujitsu
M10/SPARC
M10
XSCF
Reference
Manual
.
Changing
the
number
of
root
complexes
to
eight
increases
the
maximum
number
of
mounted
PCI
cards.
However,
because
device
path
names
change
with
the
reconfiguration
of
the
I/O
bus,
system
reconfiguration
such
as
to
set
a
device
path
name
again
may
be
required
for
any
device
path
names
used
by
applications.
Chapter
3
PCI
Card
Mounting
Rules
for
the
SPARC
M12-2S
29
Содержание SPARC M12
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