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em(4): update sysctl list, mention iflib(4)

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Some of the settings, e.g. disabling/enabling msix, are now handled
as generic iflib variables; mention iflib explicitly in tunables
section (in addition to SEE ALSO).

Reviewed by:	cc, gbe (manpages)
Differential Revision:	https://reviews.freebsd.org/D39999
This commit is contained in:
Yuri Pankov 2023-05-09 10:00:32 +02:00
parent 20d8d9809a
commit b0cf48305f
1 changed files with 10 additions and 16 deletions
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26
share/man/man4/em.4
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@ -31,7 +31,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd January 30, 2019
.Dd May 8, 2023
.Dt EM 4
.Os
.Sh NAME
@ -215,6 +215,9 @@ Tunables can be set at the
.Xr loader 8
prompt before booting the kernel or stored in
.Xr loader.conf 5 .
See
.Xr iflib 4
for per-instance variables.
.Bl -tag -width indent
.It Va hw.em.disable_crc_stripping
Disable or enable hardware stripping of CRC field.
@ -224,27 +227,12 @@ Default 0 (enabled).
.It Va hw.em.eee_setting
Disable or enable Energy Efficient Ethernet.
Default 1 (disabled).
.It Va hw.em.msix
Enable or disable MSI-X style interrupts.
Default 1 (enabled).
.It Va hw.em.smart_pwr_down
Enable or disable smart power down features on newer adapters.
Default 0 (disabled).
.It Va hw.em.sbp
Show bad packets when in promiscuous mode.
Default 0 (off).
.It Va hw.em.rxd
Number of receive descriptors allocated by the driver.
The default value is 1024 for adapters newer than 82547,
and 256 for older ones.
The 82542 and 82543-based adapters can handle up to 256 descriptors,
while others can have up to 4096.
.It Va hw.em.txd
Number of transmit descriptors allocated by the driver.
The default value is 1024 for adapters newer than 82547,
and 256 for older ones.
The 82542 and 82543-based adapters can handle up to 256 descriptors,
while others can have up to 4096.
.It Va hw.em.rx_int_delay
This value delays the generation of receive interrupts in units of
1.024 microseconds.
@ -264,6 +252,12 @@ If
.Va hw.em.tx_int_delay
is non-zero, this tunable limits the maximum delay in which a transmit
interrupt is generated.
.It Va hw.em.max_interrupt_rate
Maximum interrupts per second.
The default value is 8000.
.It Va hw.em.rx_process_limit
Maximum number of received packets to process at a time, -1 means unlimited.
The default value is 100.
.El
.Sh FILES
.Bl -tag -width /dev/led/em*