Commit Graph

9 Commits

Author SHA1 Message Date
Maxim Sobolev
e50d35e6c6 Add new tunable 'net.link.ifqmaxlen' to set default send interface
queue length. The default value for this parameter is 50, which is
quite low for many of today's uses and the only way to modify this
parameter right now is to edit if_var.h file. Also add read-only
sysctl with the same name, so that it's possible to retrieve the
current value.

MFC after:	1 month
2010-05-03 07:32:50 +00:00
Andriy Gapon
8e45f0b7c6 strict kobj signatures: fix assortment of miibus_writereg impls
return type should be int, not void

Reviewed by:	imp, current@
Approved by:	jhb (mentor)
2009-06-11 17:14:54 +00:00
Attilio Rao
1abcdbd127 When user_frac in the polling subsystem is low it is going to busy the
CPU for too long period than necessary.  Additively, interfaces are kept
polled (in the tick) even if no more packets are available.
In order to avoid such situations a new generic mechanism can be
implemented in proactive way, keeping track of the time spent on any
packet and fragmenting the time for any tick, stopping the processing
as soon as possible.

In order to implement such mechanism, the polling handler needs to
change, returning the number of packets processed.
While the intended logic is not part of this patch, the polling KPI is
broken by this commit, adding an int return value and the new flag
IFCAP_POLLING_NOCOUNT (which will signal that the return value is
meaningless for the installed handler and checking should be skipped).

Bump __FreeBSD_version in order to signal such situation.

Reviewed by:	emaste
Sponsored by:	Sandvine Incorporated
2009-05-30 15:14:44 +00:00
Benno Rice
aec9f8e993 - Move ether_ifdetach earlier.
- Drain callouts after ether_ifdetach.

Suggested by:	jhb
2008-06-17 05:48:42 +00:00
Benno Rice
6e48215925 Use callout_init_mtx to simplify locking somewhat. While we're here, rearrange
some operations in smc_detach to remove the need for the smc_shutdown variable.

Suggested by:	jhb
2008-06-13 00:48:09 +00:00
Benno Rice
764e058a5b Make sure we drain our taskqueues and stop our callouts in detach. 2008-06-12 00:38:54 +00:00
Benno Rice
3c463a49eb Switch to using a normal mutex instead of a spin mutex.
We still use the interrupt filter due to performance problems that show up if
we don't.  The main problem seen is that, due to the interrupt being edge
triggered, we occasionally miss interrupts which leads us to not notice that
we can transmit more packets.  Using the new approach, which just schedules
a task on a taskqueue, we are guaranteed to have the task run even if the
interrupt arrived while we were already executing.  If we were to use an
ithread the system would mask the interrupt while the handler is run and we'd
miss interrupts.
2008-06-11 07:26:02 +00:00
Benno Rice
269a069678 Convert bus_space_{read,write}_* calls to bus_{read,write}_* calls.
Suggested by:	jhb
2008-06-11 06:53:55 +00:00
Benno Rice
694c651803 This is a rewritten driver for the SMSC LAN91C111. It's based in part on the
sn(4) driver and also looking at newer drivers.  The reason for the rewrite is
to support MII and to try and resolve some performance issues found when trying
to use the sn(4) driver on the Gumstix network boards.

For reference, the SMSC LAN91C111 is a non-PCI ethernet part whose lineage
dates back to Ye Olde Days of ISA.  It seems to get some use in the embedded
space these days on parts lacking on-board MACs or on-board PCI controllers,
such as the XScale PXA line of ARM CPUs.

This also includes a driver for the SMSC LAN83C183 10/100 PHY.

Man page to follow.
2008-06-06 05:00:49 +00:00