Solarflare
Server
Adapter
User
Guide
Solarflare
Adapters
on
Linux
Issue
20
©
Solarflare
Communications
2017
129
port_rx_pm_trunc_vfifo_full
Number
of
packets
truncated
or
discarded
because
there
was
not
enough
packet
memory
available
to
receive
them.
Happens
when
packets
cannot
be
delivered
as
quickly
as
they
arrive
due
to:
•
packet
rate
exceeds
maximum
supported
by
the
adapter.
•
adapter
is
inserted
into
a
low
speed
or
low
width
PCI
slot
–
so
the
PCIe
bus
cannot
support
the
required
bandwidth.
•
packets
are
being
replicated
by
the
adapter
and
the
resulting
bandwidth
cannot
be
handled
by
the
PCIe
bus.
•
host
memory
bandwidth
is
being
used
by
other
devices
resulting
in
poor
performance
for
the
adapter.
port_rx_pm_discard_vfifo_full
Count
of
the
number
of
packets
dropped
because
of
a
lack
of
main
packet
memory
on
the
adapter
to
receive
the
packet
into.
port_rx_pm_trunc_qbb
Not
currently
supported.
port_rx_pm_discard_qbb
Not
currently
supported.
port_rx_pm_discard_mapping
Number
of
packets
dropped
because
they
have
an
802.1p
priority
level
configured
to
be
dropped
port_rx_dp_q_disabled_packets
Increments
when
the
filter
indicates
the
packet
should
be
delivered
to
a
specific
rx
queue
which
is
currently
disabled
due
to
configuration
error
or
error
condition.
port_rx_dp_di_dropped_packets
Number
of
packets
dropped
because
the
filters
indicate
the
packet
should
be
dropped.
Can
happen
because:
•
the
packet
does
not
match
any
filter.
•
the
matched
filter
indicates
the
packet
should
be
dropped.
Table
28:
Ethtool
‐
S
output
Field
Description