Date: Wed, 4 Jan 2012 00:03:50 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r229448 - stable/8/share/man/man4 Message-ID: <201201040003.q0403oZC050275@svn.freebsd.org>
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Author: yongari Date: Wed Jan 4 00:03:50 2012 New Revision: 229448 URL: http://svn.freebsd.org/changeset/base/229448 Log: MFC r227349,227513-227514: r227349: Document TI_SF_BUF_JUMBO and Xr altq. r227513: Document newly introduced a loader tunable and sysctl variables. r227514: Clarify hw.ti.%d.dac tunable. Modified: stable/8/share/man/man4/ti.4 Directory Properties: stable/8/share/man/man4/ (props changed) Modified: stable/8/share/man/man4/ti.4 ============================================================================== --- stable/8/share/man/man4/ti.4 Wed Jan 4 00:03:33 2012 (r229447) +++ stable/8/share/man/man4/ti.4 Wed Jan 4 00:03:50 2012 (r229448) @@ -30,7 +30,7 @@ .\" .\" $FreeBSD$ .\" -.Dd July 16, 2005 +.Dd November 14, 2011 .Dt TI 4 .Os .Sh NAME @@ -42,7 +42,7 @@ place the following lines in your kernel configuration file: .Bd -ragged -offset indent .Cd "device ti" -.Cd "options TI_PRIVATE_JUMBOS" +.Cd "options TI_SF_BUF_JUMBO" .Cd "options TI_JUMBO_HDRSPLIT" .Ed .Pp @@ -97,13 +97,14 @@ for more discussion on zero copy receive .Pp The .Nm -driver normally uses jumbo receive buffers allocated by the +driver uses UMA backed jumbo receive buffers, but can be configured +to use .Xr sendfile 2 -buffer allocator, but can be configured to use its own private pool of -jumbo buffers that are contiguous instead of buffers from the jumbo -allocator, which are made up of multiple page sized chunks. -To turn on private jumbos, use the -.Dv TI_PRIVATE_JUMBOS +buffer allocator. +To turn on +.Xr sendfile 2 +buffer allocator, use the +.Dv TI_SF_BUF_JUMBO option. .Pp Support for vlans is also available using the @@ -203,6 +204,93 @@ NEC Gigabit Ethernet .It Silicon Graphics PCI Gigabit Ethernet adapter .El +.Sh LOADER TUNABLES +Tunables can be set at the +.Xr loader 8 +prompt before booting the kernel or stored in +.Xr loader.conf 5 . +.Bl -tag -width "xxxxxx" +.It Va hw.ti.%d.dac +If this tunable is set to 0 it will disable DAC (Dual Address Cycle). +The default value is 1 which means driver will use full 64bit +DMA addressing. +.El +.Sh SYSCTL VARIABLES +The following variables are available as both +.Xr sysctl 8 +variables and +.Xr loader 8 +tunables. +The interface has to be brought down and up again before a +change takes effect when any of the following tunables are +changed. +The one microsecond clock tick referenced below is a nominal +time and the actual hardware may not provide granularity to +this level. +For example, on Tigon 2 (revision 6) cards with release 12.0 +the clock granularity is 5 microseconds. +.Bl -tag -width "xxxxxx" +.It Va dev.ti.%d.rx_coal_ticks +This value, receive coalesced ticks, controls the number of clock +ticks (of 1 microseconds each) that must elapse before the NIC DMAs +the receive return producer pointer to the Host and generates an +interrupt. +This parameter works in conjunction with the rx_max_coal_bds, +receive max coalesced BDs, tunable parameter. +The NIC will return the receive return producer pointer to the Host +when either of the thresholds is exceeded. +A value of 0 means that this parameter is ignored and receive BDs +will only be returned when the receive max coalesced BDs value is +reached. +The default valus is 170. +.It Va dev.ti.%d.rx_max_coal_bds +This value, receive max coalesced BDs, controls the number of +receive buffer descriptors that will be coalesced before the NIC +updates the receive return ring producer index. +If this value is set to 0 it will disable receive buffer descriptor +coalescing. +The default valus is 64. +.It Va dev.ti.%d.ti_tx_coal_ticks +This value, send coalesced ticks, controls the number of clock +ticks (of 1 microseconds each) that must elapse before the NIC DMAs +the send consumer pointer to the Host and generates an interrupt. +This parameter works in conjunction with the tx_max_coal_bds, +send max coalesced BDs, tunable parameter. +The NIC will return the send consumer pointer to the Host when +either of the thresholds is exceeded. +A value of 0 means that this parameter is ignored and send BDs will +only be returned when the send max coalesced BDs value is reached. +The default value is 2000. +.It Va dev.ti.%d.tx_max_coal_bds +This value, send max coalesced BDs, controls the number of send +buffer descriptors that will be coalesced before the NIC updates +the send consumer index. +If this valus is set to 0 it will disable send buffer descriptor +coalescing. +The default valus is 32. +.It Va dev.ti.%d.tx_buf_ratio +This value controls the ratio of the remaining memory in the NIC +that should be devoted to transmit buffer vs. receive buffer. +The lower 7 bits are used to indicate the ratio in 1/64th increments. +For example, setting this value to 16 will set the transmit buffer +to 1/4 of the remaining buffer space. +In no cases will the transmit or receive buffer be reduced below +68 KB. +For a 1 MB NIC the approximate total space for data buffers is +800 KB. +For a 512 KB NIC that number is 300 KB. +The default value is 21. +.It Va dev.ti.%d.stat_ticks +The value, stat ticks, controls the number of clock ticks +(of 1 microseconds each) that must elapse before the NIC DMAs +the statistics block to the Host and generates a STATS_UPDATED +event. +If set to zero then statistics are never DMAed to the Host. +It is recommended that this value be set to a high enough +frequency to not mislead someone reading statistics refreshes. +Several times a second is enough. +The default value is 2000000 (2 seconds). +.El .Sh IOCTLS In addition to the standard .Xr socket 2 @@ -313,6 +401,7 @@ the network connection (cable). .El .Sh SEE ALSO .Xr sendfile 2 , +.Xr altq 4 , .Xr arp 4 , .Xr netintro 4 , .Xr ng_ether 4 ,
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