FreeBSD src
57af292d36
This is two fixes, which establishes what I /think/ is pretty close to the theoretical PHY maximum speed on the AR9380 devices. * When doing A-MPDU on a TID, don't queue to the hardware directly if the hardware queue is busy. This gives us time to get more packets queued up (and the hardware is busy, so there's no point in queuing more to the hardware right now) to potentially form an A-MPDU. This fixes up the throughput issue I was seeing where a couple hundred single frames were being sent a second interspersed between A-MPDU frames. It just happened that the software queue had exactly one frame in it at that point. Queuing it until the hardware finishes transmitting isn't exactly costly. * When determining whether to dequeue from a software node/TID queue into the hardware queue, fix up the checks to work right for EDMA chips (ar9380 and later.) Before it was not dispatching anything until the FIFO was empty. Now we allow it to dispatch another aggregate up to the hardware aggregate limit, like I intended with the earlier work. This allows a 5GHz HT40, short-GI, "htprotmode off" test at MCS23 to achieve 357 Mbit/sec in a one-way UDP test. The stars have to be aligned /just right/ so there are no retries but it can happen. Just don't expect it to work in an OTA test if your 2yo is running around the room - MCS23 is very very sensitive to channel conditions. Tested: * AR9380 STA (test) -> AR9580 hostap TODO: * More thorough testing on pre-AR9380 chips (AR5416, AR9160, AR9280) * (Finally) teach ath_rate_sample about throughput/latency rather than air time, so I can get good transmit rates with a 2yo running around. |
||
|---|---|---|
| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| targets | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7) and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The `buildkernel` and `installkernel` targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process. See build(7), config(8), and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information. Note: If you want to build and install the kernel with the `buildkernel` and `installkernel` targets, you might need to build world before. More information is available in the handbook. The kernel configuration files reside in the sys/<arch>/conf sub-directory. GENERIC is the default configuration used in release builds. NOTES contains entries and documentation for all possible devices, not just those commonly used. Source Roadmap: --------------- bin System/user commands. cddl Various commands and libraries under the Common Development and Distribution License. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tests Regression tests which can be run by Kyua. See tests/README for additional information. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html