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Diffstat (limited to 'share/man/man4/mxge.4')
| -rw-r--r-- | share/man/man4/mxge.4 | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/share/man/man4/mxge.4 b/share/man/man4/mxge.4 index 87b3217..50cc0a9 100644 --- a/share/man/man4/mxge.4 +++ b/share/man/man4/mxge.4 @@ -31,7 +31,7 @@ .\" .\" $FreeBSD$ .\" -.Dd September 15, 2006 +.Dd February 13, 2008 .Dt MXGE 4 .Os .Sh NAME @@ -53,6 +53,8 @@ module at boot time, place the following lines in if_mxge_load="YES" mxge_ethp_z8e_load="YES" mxge_eth_z8e_load="YES" +mxge_rss_ethp_z8e_load="YES" +mxge_rss_eth_z8e_load="YES" .Ed .Sh DESCRIPTION The @@ -60,7 +62,8 @@ The driver provides support for PCI Express 10 Gigabit Ethernet adapters based on the Myricom LANai Z8E chip. The driver supports Transmit/Receive checksum offload, -Jumbo Frames as well as TCP segmentation offload (TSO). +Jumbo Frames, TCP segmentation offload (TSO) as well +as Large Receive Offload (LRO). For further hardware information, see .Pa http://www.myri.com/ . .Pp @@ -106,12 +109,44 @@ This value delays the generation of all interrupts in units of The default value is 30. .It Va hw.mxge.skip_pio_read This value determines whether or not the driver may omit doing a -pio read in the interrupt handler which ensures that the interrupt +PIO read in the interrupt handler which ensures that the interrupt line has been deasserted when using xPIC interrupts. A non-zero value may result in lower CPU overhead, however it may also result in spurious interrupts. The default value is 0. +This tunable has no effect when the device is +using MSI or MSI-X interrupts. +.It Va hw.mxge.max_slices +This value determines the maximum number of slices the driver +will attempt to use. +The default value is 1. +A slice is comprised +of a set of receive queues and an associated interrupt thread. +When using multiple slices, the NIC hashes traffic to different slices +based on the value of +.Va hw.mxge.rss_hash_type . +Using multiple slices requires that your motherboard and Myri10GE NIC +both be capable of MSI-X. +Older Myri10GE NICs can be field upgraded to add +MSI-X using the "10G NIC Tool Kit" for FreeBSD which is available from +.Pa http://www.myri.com/scs/download-10g-tools.html . +.Pp +.It Va hw.mxge.rss_hash_type +This value determines how incoming traffic is steered to different +slices. +This tunable is ignored when using just a single slice. +The legal values for this tunable are: +.Bl -tag -width "XXXX" +.It 1 +Hash on the source and destination IPv4 addresses. +.It 2 +Hash on source and destination IPv4 addresses and if the packet +is TCP, then also hash on the TCP source and destination ports. +.It 4 +Hash on the TCP or UDP source ports. +This is the default value. +.El .El .Sh DIAGNOSTICS .Bl -diag @@ -121,7 +156,8 @@ A fatal initialization error has occurred. A fatal initialization error has occurred. .It "mxge%d: Could not find firmware image %s" The appropriate firmware kld module was not installed. -This is a fatal initialization error. +This is a non-fatal initialization error, but will +result in running in a reduced performance mode. .El .Sh SUPPORT For general information and support, |
