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Message-Id: <1346132337-21325-1-git-send-email-lw@cn.fujitsu.com> Date: Tue, 28 Aug 2012 13:38:57 +0800 From: Li Wei <lw@...fujitsu.com> To: shemminger@...tta.com Cc: netdev@...r.kernel.org, Li Wei <lw@...fujitsu.com> Subject: [PATCH] iproute2: tc.8: update UNITS section. - rename section UNITS to PARAMETERS. - break section PARAMETERS down to four subsections to cover the common used parameter types(RATES, TIMES, SIZES, VALUES). - add some explaination for IEC units in RATES. - point out the max value we can set for RATES, TIMES and SIZES. Signed-off-by: Li Wei <lw@...fujitsu.com> --- man/man8/tc.8 | 111 +++++++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 85 insertions(+), 26 deletions(-) diff --git a/man/man8/tc.8 b/man/man8/tc.8 index 98fbfcd..44d644a 100644 --- a/man/man8/tc.8 +++ b/man/man8/tc.8 @@ -257,19 +257,20 @@ qdiscs applies. FILTERS Filters have a three part ID, which is only needed when using a hashed filter hierarchy. -.SH UNITS -All parameters accept a floating point number, possibly followed by a unit. -.P -Bandwidths or rates can be specified in: -.TP -bps -Bytes per second + +.SH PARAMETERS +These following parameters are widely used in TC, for other parameters, +see the man page for individual qdiscs. + .TP -kbps -Kilobytes per second +RATES +Bandwidths or rates. +These parameters accept a floating point number, possibly followed by +a unit(both SI and IEC units supported). +.RS .TP -mbps -Megabytes per second +bit or a bare number +Bits per second .TP kbit Kilobits per second @@ -277,27 +278,41 @@ Kilobits per second mbit Megabits per second .TP -bit or a bare number -Bits per second -.P -Amounts of data can be specified in: +gbit +Gegabits per second .TP -kb or k -Kilobytes +tbit +Terabits per second .TP -mb or m -Megabytes +bps +Bytes per second .TP -mbit -Megabits +kbps +Kilobytes per second .TP -kbit -Kilobits +mbps +Megabytes per second .TP -b or a bare number -Bytes. +gbps +Gigabytes per second +.TP +tbps +Terabytes per second + +.P +To specified in IEC units, just replace the SI prefix(k-, m-, g-, t-) with +IEC prefix(ki-, mi-, gi- and ti-) respectively. + .P -Lengths of time can be specified in: +TC store rates as a __u32 integer in bps internally, +so we can specify a max rate of UINT32_MAX bps. +.RE + +.TP +TIMES +Length of time. Can be specified as a float pointing number +followed by an optional unit: +.RS .TP s, sec or secs Whole seconds @@ -308,6 +323,50 @@ Milliseconds us, usec, usecs or a bare number Microseconds. +.P +TC defined it's own time unit(equals to microsecond) and store time values +as __u32 integer, thus we can specify a max time value of UINT32_MAX usecs. +.RE + +.TP +SIZES +Amounts of data. Can be specified as a float pointing number +followed by an optional unit: +.RS +.TP +b or a bare number +Bytes. +.TP +kbit +Kilobites +.TP +kb or k +Kilobytes +.TP +mbit +Megabits +.TP +mb or m +Megabytes +.TP +gbit +Gigabites +.TP +gb or g +Gigabytes + +.P +TC store sizes internally as __u32 integer in byte, so we can specify +a max size of UINT32_MAX bytes. +.RE + +.TP +VALUES +Other values without a unit. +These parameters read as decimal by default, but you can +indicate TC to read them as octal and hexadecimal by adding a '0' +or '0x' prefix respectively. + .SH TC COMMANDS The following commands are available for qdiscs, classes and filter: .TP -- 1.7.10.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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