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authorScott Bardone <sbardone@chelsio.com>2005-06-23 01:40:19 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-06-23 01:40:19 -0400
commit559fb51ba7e66fe298b8355fabde1275b7def35f (patch)
treee1de3eb86ea5e6ac8c5f27dc32140a0c2aacc51e /Documentation/networking
parenta5324343955997d1439f26518ddac567cd5d134b (diff)
downloadop-kernel-dev-559fb51ba7e66fe298b8355fabde1275b7def35f.zip
op-kernel-dev-559fb51ba7e66fe298b8355fabde1275b7def35f.tar.gz
Update Chelsio gige net driver.
- Use extern prefix for functions required. - Removed a lot of wrappers, including t1_read/write_reg_4. - Removed various macros, using native kernel calls now. - Enumerated various #defines. - Removed a lot of shared code which is not currently used in "NIC only" mode. - Removed dead code. Documentation/networking/cxgb.txt: - Updated release notes for version 2.1.1 drivers/net/chelsio/ch_ethtool.h - removed file, no longer using ETHTOOL namespace. drivers/net/chelsio/common.h - moved code from osdep.h to common.h - added comment to #endif indicating which symbol it closes. drivers/net/chelsio/cphy.h - removed dead code. - added comment to #endif indicating which symbol it closes. drivers/net/chelsio/cxgb2.c - use DMA_{32,64}BIT_MASK in include/linux/dma-mapping.h. - removed unused code. - use printk message for link info resembling drivers/net/mii.c. - no longer using the MODULE_xxx namespace. - no longer using "pci_" namespace. - no longer using ETHTOOL namespace. drivers/net/chelsio/cxgb2.h - removed file, merged into common.h drivers/net/chelsio/elmer0.h - removed dead code. - added various enums. - added comment to #endif indicating which symbol it closes. drivers/net/chelsio/espi.c - removed various macros, using native kernel calls now. - removed a lot of wrappers, including t1_read/write_reg_4. drivers/net/chelsio/espi.h - added comment to #endif indicating which symbol it closes. drivers/net/chelsio/gmac.h - added comment to #endif indicating which symbol it closes. drivers/net/chelsio/mv88x201x.c - changes to sync with Chelsio TOT. drivers/net/chelsio/osdep.h - removed file, consolidation. osdep was used to translate wrapper functions since our code supports multiple OSs. removed wrappers. drivers/net/chelsio/pm3393.c - removed various macros, using native kernel calls now. - removed a lot of wrappers, including t1_read/write_reg_4. - removed unused code. drivers/net/chelsio/regs.h - added a few register entries for future and current feature support. - added comment to #endif indicating which symbol it closes. drivers/net/chelsio/sge.c - rewrote large portion of scatter-gather engine to stabilize performance. - using u8/u16/u32 kernel types instead of __u8/__u16/__u32 compiler types. drivers/net/chelsio/sge.h - rewrote large portion of scatter-gather engine to stabilize performance. - added comment to #endif indicating which symbol it closes. drivers/net/chelsio/subr.c - merged tp.c into subr.c - removed various macros, using native kernel calls now. - removed a lot of wrappers, including t1_read/write_reg_4. - removed unused code. drivers/net/chelsio/suni1x10gexp_regs.h - modified copyright and authorship of file. - added comment to #endif indicating which symbol it closes. drivers/net/chelsio/tp.c - removed file, merged into subr.c. drivers/net/chelsio/tp.h - removed file. include/linux/pci_ids.h - patched to include PCI_VENDOR_ID_CHELSIO 0x1425, removed define from our code.
Diffstat (limited to 'Documentation/networking')
-rw-r--r--Documentation/networking/cxgb.txt72
1 files changed, 51 insertions, 21 deletions
diff --git a/Documentation/networking/cxgb.txt b/Documentation/networking/cxgb.txt
index 9f2eb64..7632463 100644
--- a/Documentation/networking/cxgb.txt
+++ b/Documentation/networking/cxgb.txt
@@ -2,9 +2,9 @@
Driver Release Notes for Linux
- Version 2.1.0
+ Version 2.1.1
- March 8, 2005
+ June 20, 2005
CONTENTS
========
@@ -21,8 +21,7 @@ INTRODUCTION
This document describes the Linux driver for Chelsio 10Gb Ethernet Network
Controller. This driver supports the Chelsio N210 NIC and is backward
- compatible with the Chelsio N110 model 10Gb NICs. This driver supports AMD64
- and EM64T, and x86 systems.
+ compatible with the Chelsio N110 model 10Gb NICs.
FEATURES
@@ -121,23 +120,17 @@ PERFORMANCE
Disabling SACK:
sysctl -w net.ipv4.tcp_sack=0
- Setting TCP read buffers (min/default/max):
- sysctl -w net.ipv4.tcp_rmem="10000000 10000000 10000000"
-
- Setting TCP write buffers (min/pressure/max):
- sysctl -w net.ipv4.tcp_wmem="10000000 10000000 10000000"
-
- Setting TCP buffer space (min/pressure/max):
- sysctl -w net.ipv4.tcp_mem="10000000 10000000 10000000"
-
- Setting large number of incoming connection requests (2.6.x only):
+ Setting large number of incoming connection requests:
sysctl -w net.ipv4.tcp_max_syn_backlog=3000
Setting maximum receive socket buffer size:
- sysctl -w net.core.rmem_max=524287
+ sysctl -w net.core.rmem_max=1024000
Setting maximum send socket buffer size:
- sysctl -w net.core.wmem_max=524287
+ sysctl -w net.core.wmem_max=1024000
+
+ Set smp_affinity (on a multiprocessor system) to a single CPU:
+ echo 1 > /proc/irq/<interrupt_number>/smp_affinity
Setting default receive socket buffer size:
sysctl -w net.core.rmem_default=524287
@@ -151,8 +144,14 @@ PERFORMANCE
Setting maximum backlog (# of unprocessed packets before kernel drops):
sysctl -w net.core.netdev_max_backlog=300000
- Set smp_affinity (on a multiprocessor system) to a single CPU:
- echo 00000001 > /proc/irq/<interrupt_number>/smp_affinity
+ Setting TCP read buffers (min/default/max):
+ sysctl -w net.ipv4.tcp_rmem="10000000 10000000 10000000"
+
+ Setting TCP write buffers (min/pressure/max):
+ sysctl -w net.ipv4.tcp_wmem="10000000 10000000 10000000"
+
+ Setting TCP buffer space (min/pressure/max):
+ sysctl -w net.ipv4.tcp_mem="10000000 10000000 10000000"
TCP window size for single connections:
The receive buffer (RX_WINDOW) size must be at least as large as the
@@ -186,7 +185,7 @@ DRIVER MESSAGES
may be found in /var/log/messages.
Driver up:
- Chelsio Network Driver - version 2.1.0
+ Chelsio Network Driver - version 2.1.1
NIC detected:
eth#: Chelsio N210 1x10GBaseX NIC (rev #), PCIX 133MHz/64-bit
@@ -282,13 +281,44 @@ KNOWN ISSUES
the number of outstanding transactions, via BIOS configuration
programming of the PCI-X card, to the following:
- Data Length (bytes): 2k
- Total allowed outstanding transactions: 1
+ Data Length (bytes): 1k
+ Total allowed outstanding transactions: 2
Please refer to AMD 8131-HT/PCI-X Errata 26310 Rev 3.08 August 2004,
section 56, "133-MHz Mode Split Completion Data Corruption" for more
details with this bug and workarounds suggested by AMD.
+ It may be possible to work outside AMD's recommended PCI-X settings, try
+ increasing the Data Length to 2k bytes for increased performance. If you
+ have issues with these settings, please revert to the "safe" settings
+ and duplicate the problem before submitting a bug or asking for support.
+
+ NOTE: The default setting on most systems is 8 outstanding transactions
+ and 2k bytes data length.
+
+ 4. On multiprocessor systems, it has been noted that an application which
+ is handling 10Gb networking can switch between CPUs causing degraded
+ and/or unstable performance.
+
+ If running on an SMP system and taking performance measurements, it
+ is suggested you either run the latest netperf-2.4.0+ or use a binding
+ tool such as Tim Hockin's procstate utilities (runon)
+ <http://www.hockin.org/~thockin/procstate/>.
+
+ Binding netserver and netperf (or other applications) to particular
+ CPUs will have a significant difference in performance measurements.
+ You may need to experiment which CPU to bind the application to in
+ order to achieve the best performance for your system.
+
+ If you are developing an application designed for 10Gb networking,
+ please keep in mind you may want to look at kernel functions
+ sched_setaffinity & sched_getaffinity to bind your application.
+
+ If you are just running user-space applications such as ftp, telnet,
+ etc., you may want to try the runon tool provided by Tim Hockin's
+ procstate utility. You could also try binding the interface to a
+ particular CPU: runon 0 ifup eth0
+
SUPPORT
=======
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