On Tue, Jun 15, 2010 at 10:14 PM, Gorka Guardiola pau...@gmail.com wrote:
On Wed, Jun 16, 2010 at 12:07 AM, erik quanstrom quans...@quanstro.net
wrote:
Last time I needed something similar, I just run a modified iostats.
how does iostats add latency?
hence the modified.
Hi Gorka
Do you
On Tue, Jun 22, 2010 at 2:53 PM, John Floren slawmas...@gmail.com wrote:
On Tue, Jun 15, 2010 at 10:14 PM, Gorka Guardiola pau...@gmail.com wrote:
On Wed, Jun 16, 2010 at 12:07 AM, erik quanstrom quans...@quanstro.net
wrote:
Last time I needed something similar, I just run a modified iostats.
On Tue, Jun 15, 2010 at 9:45 PM, Devon H. O'Dell devon.od...@gmail.com wrote:
2010/6/15 John Floren slawmas...@gmail.com:
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a high-latency
network, but since I may be
On programs where I control the client and the server, I simulated
it by spawning a process that did sleep and then do the write.
That is, you could send many things at once (i.e., same bandwidth)
but you could pretend the thing was delayed.
One tricky point was to be sure that sends were still
On Wed Jun 16 18:17:45 EDT 2010, n...@lsub.org wrote:
On programs where I control the client and the server, I simulated
it by spawning a process that did sleep and then do the write.
That is, you could send many things at once (i.e., same bandwidth)
but you could pretend the thing was
the ethernet, or shim ethernet, device seems like a better place for
this.
ip is not the only protocol! that's what loopback(3) does, but without
the real network. it would be good to plug loopback or similar into a
real
ethernet. it's also worth looking at loopback's implementation
On Wed, 16 Jun 2010 18:31:17 EDT erik quanstrom quans...@quanstro.net wrote:
On Wed Jun 16 18:17:45 EDT 2010, n...@lsub.org wrote:
On programs where I control the client and the server, I simulated
it by spawning a process that did sleep and then do the write.
That is, you could send
You'd need some plumbing in devether to demultiplex incoming
packets addressed to this device (assuming it has its own MAC
address).
i don't think you would. if you're using the latency device as your
ethernet device, no muxing is required.
Something like a tap device would allow you to
On Wed, 16 Jun 2010 20:10:49 EDT erik quanstrom quans...@quanstro.net wrote:
You'd need some plumbing in devether to demultiplex incoming
packets addressed to this device (assuming it has its own MAC
address).
i don't think you would. if you're using the latency device as your
ethernet
i don't think you would. if you're using the latency device as your
ethernet device, no muxing is required.
Yes, if you dedicate a port. A reasonable tradeoff in some cases.
you don't need to dedicate a port. just open protocol -1.
Something like a tap device would allow you to
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a high-latency
network, but since I may be modifying the kernel, running stuff on
e.g. mordor is not the best option. I have enough systems here to do
the tests, I just need
On Tue, Jun 15, 2010 at 5:29 PM, John Floren slawmas...@gmail.com wrote:
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a high-latency
network, but since I may be modifying the kernel, running stuff on
e.g. mordor is
2010/6/15 John Floren slawmas...@gmail.com:
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a high-latency
network, but since I may be modifying the kernel, running stuff on
e.g. mordor is not the best option. I have
I've come up with a basic idea, but before I go diving in I want to
run it by 9fans and get opinions. What I'm thinking is writing a
synthetic file system that will collect writes to /net; to simulate a
high-latency file copy, you would run this synthetic fs, then do 9fs
remote; cp
On Tue, Jun 15, 2010 at 2:39 PM, erik quanstrom quans...@quanstro.netwrote:
I've come up with a basic idea, but before I go diving in I want to
run it by 9fans and get opinions. What I'm thinking is writing a
synthetic file system that will collect writes to /net; to simulate a
the only trick will be getting the simulated ethernet to
grab the real ethernet during setup. i imagine that you'll
need something like
ether0=type=fake
fake=real=#l1/ether1 i=10 iσ=20 o=5 oσ=0
in plan9.ini
- erik
Could one write a filesystem server that is a
On Tue, Jun 15, 2010 at 11:29 PM, John Floren slawmas...@gmail.com wrote:
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a high-latency
network, but since I may be modifying the kernel, running stuff on
e.g. mordor is
Last time I needed something similar, I just run a modified iostats.
how does iostats add latency?
- erik
On Tue, Jun 15, 2010 at 11:39 PM, Jorden M jrm8...@gmail.com wrote:
On Tue, Jun 15, 2010 at 5:29 PM, John Floren slawmas...@gmail.com wrote:
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a high-latency
network, but
On Wed, Jun 16, 2010 at 12:07 AM, erik quanstrom quans...@quanstro.net wrote:
Last time I needed something similar, I just run a modified iostats.
how does iostats add latency?
hence the modified.
--
- curiosity sKilled the cat
On Tue, Jun 15, 2010 at 5:45 PM, Devon H. O'Dell devon.od...@gmail.com wrote:
2010/6/15 John Floren slawmas...@gmail.com:
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a high-latency
network, but since I may be
2010/6/15 John Floren slawmas...@gmail.com:
On Tue, Jun 15, 2010 at 5:45 PM, Devon H. O'Dell devon.od...@gmail.com
wrote:
2010/6/15 John Floren slawmas...@gmail.com:
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a
any reason loopback(3) wont work? it has options for delay and latency.
I'm going to be doing some work with 9P and high-latency links this
summer and fall. I need to be able to test things over a high-latency
network, but since I may be modifying the kernel, running stuff on
e.g. mordor is
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