ethernet/chelsio/cxgb.rst

1 .. SPDX-License-Identifier: GPL-2.0
8 Driver Release Notes for Linux
35 Adaptive Interrupts (adaptive-rx)
36 ---------------------------------
46   By default, adaptive-rx is disabled.
47   To enable adaptive-rx::
49       ethtool -C <interface> adaptive-rx on
51   To disable adaptive-rx, use ethtool::
53       ethtool -C <interface> adaptive-rx off
55   After disabling adaptive-rx, the timer latency value will be set to 50us.
56   You may set the timer latency after disabling adaptive-rx::
58       ethtool -C <interface> rx-usecs <microseconds>
62       ethtool -C eth0 rx-usecs 100
64   You may also provide a timer latency value while disabling adaptive-rx::
66       ethtool -C <interface> adaptive-rx off rx-usecs <microseconds>
68   If adaptive-rx is disabled and a timer latency value is specified, the timer
70   adaptive-rx is enabled.
72   To view the status of the adaptive-rx and timer latency values::
74       ethtool -c <interface>
78 -----------------------------------------
90       ethtool -K <interface> tso off
94       ethtool -K <interface> tso on
98       ethtool -k <interface>
107  application. Doing so is not warranted in any way by Chelsio Communications,
116  your system. You may want to write a script that runs at boot-up which
121       setpci -d 1425::
127       sysctl -w net.ipv4.tcp_timestamps=0
131       sysctl -w net.ipv4.tcp_sack=0
135       sysctl -w net.ipv4.tcp_max_syn_backlog=3000
139       sysctl -w net.core.rmem_max=1024000
143       sysctl -w net.core.wmem_max=1024000
151       sysctl -w net.core.rmem_default=524287
155       sysctl -w net.core.wmem_default=524287
159       sysctl -w net.core.optmem_max=524287
163       sysctl -w net.core.netdev_max_backlog=300000
167       sysctl -w net.ipv4.tcp_rmem="10000000 10000000 10000000"
171       sysctl -w net.ipv4.tcp_wmem="10000000 10000000 10000000"
175       sysctl -w net.ipv4.tcp_mem="10000000 10000000 10000000"
180    Bandwidth-Delay Product of the communication link between the sender and
182    size up to 2 times the Bandwidth-Delay Product. Reference page 289 of
190    RX_WINDOW sizes of 256KB - 512KB should be sufficient.
194        sysctl -w net.ipv4.tcp_rmem="<min> <default> <max>"
217      Chelsio Network Driver - version 2.1.1
221      eth#: Chelsio N210 1x10GBaseX NIC (rev #), PCIX 133MHz/64-bit
245       and re-assembled in a different order than expected.
262 	  chkconfig --level 2345 irqbalance off
272 	      title Red Hat Enterprise Linux AS (2.4.21-27.ELsmp)
274 	      kernel /vmlinuz-2.4.21-27.ELsmp ro root=/dev/hda3 noirqbalance
275 	      initrd /initrd-2.4.21-27.ELsmp.img
285       the ifcfg-eth# config files in /etc/sysconfig/network-scripts, looking
289       ifcfg-eth# files, it will bring up the device with the next available
303   3. Transport Protocol (TP) hangs when running heavy multi-connection traffic
304      on an AMD Opteron system with HyperTransport PCI-X Tunnel chipset.
306       If your AMD Opteron system uses the AMD-8131 HyperTransport PCI-X Tunnel
307       chipset, you may experience the "133-Mhz Mode Split Completion Data
308       Corruption" bug identified by AMD while using a 133Mhz PCI-X card on the
309       bus PCI-X bus.
311       AMD states, "Under highly specific conditions, the AMD-8131 PCI-X Tunnel
312       can provide stale data via split completion cycles to a PCI-X card that
320 	programming of the PCI-X card, to the following:
326       Please refer to AMD 8131-HT/PCI-X Errata 26310 Rev 3.08 August 2004,
327       section 56, "133-MHz Mode Split Completion Data Corruption" for more
330       It may be possible to work outside AMD's recommended PCI-X settings, try
340   4. On multiprocessor systems, it has been noted that an application which
345       is suggested you either run the latest netperf-2.4.0+ or use a binding
351       You may need to experiment which CPU to bind the application to in
354       If you are developing an application designed for 10Gb networking,
356       sched_setaffinity & sched_getaffinity to bind your application.
358       If you are just running user-space applications such as ftp, telnet,
371 -------------------------------------------------------------------------------
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