* TBF parameters: overhead and linklayer ?
@ 2010-03-15 16:42 Julien Vehent
[not found] ` <cone.1268730409.349704.27722.1001@bork.lsof.org>
0 siblings, 1 reply; 3+ messages in thread
From: Julien Vehent @ 2010-03-15 16:42 UTC (permalink / raw)
To: Netdev
Hello,
TC_TBF man page seem outdated (even in latest version of iproute2) and
doesn't explain what those two parameters do:
# tc qdisc add tbf help
Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu
BYTES[/BYTES] ]
[ peakrate KBPS ] [ latency TIME ] [ overhead BYTES ] [ linklayer
TYPE ]
- overhead ?
- linklayer ?
Or did I miss something ?
Thanks,
Julien
^ permalink raw reply [flat|nested] 3+ messages in thread[parent not found: <cone.1268730409.349704.27722.1001@bork.lsof.org>]
* Re: TBF parameters: overhead and linklayer [UTF-8]? [not found] ` <cone.1268730409.349704.27722.1001@bork.lsof.org> @ 2010-03-16 10:03 ` Julien Vehent 2010-03-16 10:21 ` TBF parameters: overhead and linklayer ? Julien Vehent 0 siblings, 1 reply; 3+ messages in thread From: Julien Vehent @ 2010-03-16 10:03 UTC (permalink / raw) To: Roel van Meer; +Cc: Netdev Thanks Roel, I then found this wwebsite from your link http://www.adsl-optimizer.dk I'm trying to find more information on how to use this... documentation is really not easily accessible. (currently reading latest iproute2 source code available) On Tue, 16 Mar 2010 10:06:49 +0100, Roel van Meer <rolek@bokxing•nl> wrote: > Julien Vehent writes: > >> TC_TBF man page seem outdated (even in latest version of iproute2) and >> doesn't explain what those two parameters do: >> >> # tc qdisc add tbf help >> Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu >> BYTES[/BYTES] ] >> [ peakrate KBPS ] [ latency TIME ] [ overhead BYTES ] [ linklayer >> TYPE ] >> >> >> - overhead ? >> - linklayer ? >> >> Or did I miss something ? > > No, you're right. You might want to have a look at this page: > http://ace-host.stuart.id.au/russell/files/tc/tc-atm/ > > Regards, > > roel ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: TBF parameters: overhead and linklayer ? 2010-03-16 10:03 ` TBF parameters: overhead and linklayer [UTF-8]? Julien Vehent @ 2010-03-16 10:21 ` Julien Vehent 0 siblings, 0 replies; 3+ messages in thread From: Julien Vehent @ 2010-03-16 10:21 UTC (permalink / raw) To: Netdev; +Cc: Roel van Meer, ahu Gotcha ! in iproute2-2.6.33/tc/tc_util.c 442 int get_linklayer(unsigned int *val, const char *arg) 443 { 444 int res; 445 446 if (matches(arg, "ethernet") == 0) 447 res = LINKLAYER_ETHERNET; 448 else if (matches(arg, "atm") == 0) 449 res = LINKLAYER_ATM; 450 else if (matches(arg, "adsl") == 0) 451 res = LINKLAYER_ATM; 452 else 453 return -1; /* Indicate error */ 454 455 *val = res; 456 return 0; 457 } Now, if I try this, it works: ses0gnoc:~# tc qdisc add dev eth0 root tbf rate 1mbit burst 10000 latency 10ms linklayer atm ses0gnoc:~# tc -s qdisc show dev eth0 qdisc tbf 8004: root rate 1000Kbit burst 10000b lat 10.0ms Sent 754 bytes 5 pkt (dropped 0, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 No ongoing taskforce to rewrite those manpages ? TC is a great tool, but documentation severely suck... On Tue, 16 Mar 2010 11:03:28 +0100, Julien Vehent <julien@linuxwall•info> wrote: > Thanks Roel, > > I then found this wwebsite from your link http://www.adsl-optimizer.dk > > I'm trying to find more information on how to use this... documentation is > really not easily accessible. > > (currently reading latest iproute2 source code available) > > On Tue, 16 Mar 2010 10:06:49 +0100, Roel van Meer <rolek@bokxing•nl> > wrote: >> Julien Vehent writes: >> >>> TC_TBF man page seem outdated (even in latest version of iproute2) and >>> doesn't explain what those two parameters do: >>> >>> # tc qdisc add tbf help >>> Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu >>> BYTES[/BYTES] ] >>> [ peakrate KBPS ] [ latency TIME ] [ overhead BYTES ] [ > linklayer >>> TYPE ] >>> >>> >>> - overhead ? >>> - linklayer ? >>> >>> Or did I miss something ? >> >> No, you're right. You might want to have a look at this page: >> http://ace-host.stuart.id.au/russell/files/tc/tc-atm/ >> >> Regards, >> >> roel > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger•kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-03-15 16:42 TBF parameters: overhead and linklayer ? Julien Vehent
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2010-03-16 10:03 ` TBF parameters: overhead and linklayer [UTF-8]? Julien Vehent
2010-03-16 10:21 ` TBF parameters: overhead and linklayer ? Julien Vehent
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