740
Lightweight
Profiling
May
Cause
System
Hang
with
Concurrent
Stop
Clock
Description
The
processor
may
hang
if
it
performs
an
internal
stop-clock
event
to
handle
an
I
/
O
C-state
request
or
P-state
change
at
approximately
the
same
time
that
a
lightweight
profiling
(
LWP
)
monitored
event
overflows
its
event
counter
,
signalling
the
need
for
an
LWP
event
record
to
be
stored
.
Only
LWP
record
type
2 (
instructions
retired
)
or
LWP
record
type
3 (
branches
retired
)
events
can
cause
this
hang
to
occur
.
LWP
is
enabled
once
software
executes
an
LLWCP
or
XRSTOR
instruction
with
a
valid
LWP
control
block
(
LWPCB
)
address
.
Potential
Effect
on
System
System
hang
.
Suggested
Workaround
Contact
your
AMD
representative
for
information
on
a
BIOS
update
.
Fix
Planned
No
fix
planned
Revision
Guide
for
AMD
Family
15
h
Models
00
h-
0
Fh
Processors
48063
Rev
. 3.18
October
2012
86
Product
Errata