Network Statistics

Solaris network drivers must implement statistics variables. GLD itself tallies some network statistics, but other statistics must be counted by each GLD-based driver. GLD provides support for GLD-based drivers to report a standard set of network driver statistics. Statistics are reported by GLD using the kstat(7D) and kstat(9S) mechanisms. The DL_GET_STATISTICS_REQ DLPI command can also be used to retrieve the current statistics counters. All statistics are maintained as unsigned, and all are 32 bits unless otherwise noted.

GLD maintains and reports the following statistics.

rbytes64

Total bytes successfully received on the interface (64 bits)

rbytes

Total bytes successfully received on the interface

obytes64

Total bytes requested to be transmitted on the interface (64 bits)

obytes

Total bytes requested to be transmitted on the interface

ipackets64

Total packets successfully received on the interface (64 bits)

ipackets

Total packets successfully received on the interface

opackets64

Total packets requested to be transmitted on the interface (64 bits)

opackets

Total packets requested to be transmitted on the interface

multircv

Multicast packets successfully received, including group and functional addresses (long)

multixmt

Multicast packets requested to be transmitted, including group and functional addresses (long)

brdcstrcv

Broadcast packets successfully received (long)

brdcstxmt

Broadcast packets requested to be transmitted (long)

unknowns

Valid received packets not accepted by any Stream (long)

noxmtbuf

Packets discarded on output because transmit buffer was busy, or no buffer could be allocated for transmit (long)

blocked

Number of times a received packet could not be put up a Stream because the queue was flow-controlled (long)

xmtretry

Times transmit was retried after having been delayed due to lack of resources (long)

promisc

Current ``promiscuous'' state of the interface (string)

The device-dependent driver counts the following statistics, keeping track of them in a private per-instance structure. When GLD is asked to report statistics, it calls the driver's gldm_get_stats() entry point (as described in the gldm_get_stats(9E) man page) to update the device-specific statistics in the gld_stats(9S) structure. GLD then reports the updated statistics using the named statistics variables shown below.

ifspeed

Current estimated bandwidth of the interface in bits per second (64 bits)

media

Current media type in use by the device (string)

intr

Times interrupt handler was called and claimed the interrupt (long)

norcvbuf

Number of times a valid incoming packet was known to have been discarded because no buffer could be allocated for receive (long)

ierrors

Total packets received that could not be processed because they contained errors (long)

oerrors

Total packets that were not successfully transmitted because of errors (long)

missed

Packets known to have been dropped by the hardware on receive (long)

uflo

Times FIFO underflowed on transmit (long)

oflo

Times receiver overflowed during receive (long)

The following group of statistics applies to networks of type DL_ETHER. These statistics are maintained by device-specific drivers of that type, as shown previously.

align_errors

Packets received with framing errors (not an integral number of octets) (long)

fcs_errors

Packets received with CRC errors (long)

duplex

Current duplex mode of the interface (string)

carrier_errors

Number of times carrier was lost or never detected on a transmission attempt (long)

collisions

Ethernet collisions during transmit (long)

ex_collisions

Frames where excess collisions occurred on transmit, causing transmit failure (long)

tx_late_collisions

Number of times a transmit collision occurred late (after 512 bit times) (long)

defer_xmts

Packets without collisions where first transmit attempt was delayed because the medium was busy (long)

first_collisions

Packets successfully transmitted with exactly one collision

multi_collisions

Packets successfully transmitted with multiple collisions

sqe_errors

Number of times SQE test error was reported

macxmt_errors

Packets encountering transmit MAC failures, except carrier and collision failures

macrcv_errors

Packets received with MAC errors, except align_errors, fcs_errors, and toolong_errors

toolong_errors

Packets received larger than the maximum permitted length

runt_errors

Packets received smaller than the minimum permitted length (long)

The following group of statistics applies to networks of type DL_TPR; these are maintained by device-specific drivers of that type, as shown above.

line_errors

Packets received with non-data bits or FCS errors

burst_errors

Number of times an absence of transitions for five half-bit timers was detected

signal_losses

Number of times loss of signal condition on the ring was detected

ace_errors

Number of times an AMP or SMP frame, in which A is equal to C is equal to 0, was followed by another such SMP frame without an intervening AMP frame

internal_errors

Number of times the station recognized an internal error

lost_frame_errors

Number of times the TRR timer expired during transmit

frame_copied_errors

Number of times a frame addressed to this station was received with the FS field `A' bit set to 1

token_errors

Number of times the station acting as the active monitor recognized an error condition that needed a token transmitted

freq_errors

Number of times the frequency of the incoming signal differed from the expected frequency

The following group of statistics applies to networks of type DL_FDDI; these are maintained by device-specific drivers of that type, as shown above

mac_errors

Frames detected in error by this MAC that had not been detected in error by another MAC

mac_lost_errors

Frames received with format errors such that the frame was stripped

mac_tokens

Number of tokens received (total of non-restricted and restricted)

mac_tvx_expired

Number of times that TVX has expired

mac_late

Number of TRT expirations since this MAC was reset or a token was received

mac_ring_ops

Number of times the ring has entered the ``Ring Operational'' state from the ``Ring Not Operational'' state