583024cf22
Petr Machata says:
====================
netdevsim: Support for L3 HW stats
"L3 stats" is a suite of interface statistics aimed at reflecting traffic
taking place in a HW device, on an object corresponding to some software
netdevice. Support for this stats suite has been added recently, in commit
ca0a53dcec94 ("Merge branch 'net-hw-counters-for-soft-devices'").
In this patch set:
- Patch #1 adds support for L3 stats to netdevsim.
Real devices can have various conditions for when an L3 counter is
available. To simulate this, netdevsim maintains a list of devices
suitable for HW stats collection. Only when l3_stats is enabled on both a
netdevice itself, and in netdevsim, will netdevsim contribute values to
L3 stats.
This enablement and disablement is done via debugfs:
# echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/enable_ifindex
# echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/disable_ifindex
Besides this, there is a third toggle to mark a device for future failure:
# echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/fail_next_enable
- This allows HW-independent testing of stats reporting and in-kernel APIs,
as well as a test for enablement rollback, which is difficult to do
otherwise. This netdevsim-specific selftest is added in patch #2.
- Patch #3 adds another driver-specific selftest, namely a test aimed at
checking mlxsw-induced stats monitoring events.
====================
Link: https://lore.kernel.org/r/cover.1647265833.git.petrm@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Linux kernel
============
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In order to build the documentation, use ``make htmldocs`` or
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There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
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the problems which may result by upgrading your kernel.