Lines Matching refs:statistics
4 Interface statistics
10 This document is a guide to Linux network interface statistics.
12 There are three main sources of interface statistics in Linux:
14 - standard interface statistics based on
16 - protocol-specific statistics; and
17 - driver-defined statistics available via ethtool.
19 Standard interface statistics
22 There are multiple interfaces to reach the standard statistics.
44 Protocol-specific statistics
47 Protocol-specific statistics are exposed via relevant interfaces,
53 Ethtool exposes common low-level statistics.
54 All the standard statistics are expected to be maintained
66 Standard ethtool statistics can be accessed via the interfaces used
70 $ ethtool --include-statistics -a eth0
79 General Ethernet statistics not associated with any particular
100 Driver-defined statistics
103 Driver-defined ethtool statistics can be dumped using `ethtool -S $ifc`, e.g.::
106 NIC statistics:
117 of interfaces as well as their statistics.
126 Each device directory in sysfs contains a `statistics` directory (e.g.
127 `/sys/class/net/lo/statistics/`) with files corresponding to
137 `Documentation/ABI/testing/sysfs-class-net-statistics`.
154 specific statistics. Historically it has also been used to report
155 statistics for which other APIs did not exist, like per-device-queue
156 statistics, or standard-based statistics (e.g. RFC 2863).
161 to retrieve the number of statistics (`.n_stats`).
168 Protocol-related statistics can be requested in get commands by setting
170 statistics are supported in the following commands:
179 Some drivers expose extra statistics via `debugfs`.
190 Drivers should report all statistics which have a matching member in
197 Please note for example that detailed error statistics must be
201 via `/proc/net/dev`. If driver may sleep when retrieving the statistics
204 allows setting the frequency of refreshing statistics, if needed.
206 Retrieving ethtool statistics is a multi-syscall process, drivers are advised
207 to keep the number of statistics constant to avoid race conditions with
218 the statistics they don't report with 0.