Closed #178.
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I am going to close this for now. Two reasons:
1. The primary reason for this report was that I misunderstood how Flent
measures latency for its default plot. Currently, that plot shows latency to
the -H host. As noted in
https://github.com/tohojo/flent/issues/181#issuecomment-530500478, there
Rich Brown writes:
> Update: I'm trying to get repeatable test showing a difference of latency
> between the Flent ping_host values and a separate/concurrent fping run. (I
> saw it two days ago, but can't reproduce now... This is roundabout way to say
> that, for the moment, the Flent ping_hos
Update: I'm trying to get repeatable test showing a difference of latency
between the Flent ping_host values and a separate/concurrent fping run. (I saw
it two days ago, but can't reproduce now... This is roundabout way to say that,
for the moment, the Flent ping_host and separate fping runs are
Rich Brown writes:
>> > 1. Could flent charts use the `--test-parameter=ping_hosts=...` instead of
>> > values from the -H host?
>
>> Well, it should probably show both by default. For now, there's a separate
>> plot type you can use to see the extra flows (-p ping_extra).
>
> I don't see how t
Rich Brown writes:
>> > 2. Why is there a discrepency between the
> `--test-parameter=ping_hosts=...` reading (showing 30-38 msec in my
> tests) and a separate, concurrent fping test (see original post, where
> it was running 20-22 msec)?
>
>> Good question. IPv4 vs IPv6 maybe?
>
> I don't thi
PS Why am I perseverating about this now? I have taken Dave's script and
packaged it for ease of use. See [Coffee Shop Bloat
Script](https://github.com/richb-hanover/coffee-shop-bloat-test)
I can conceal a lot of the options into the script if I know what they are.
Thanks again.
--
You are re
> > 2. Why is there a discrepency between the
`--test-parameter=ping_hosts=...` reading (showing 30-38 msec in my
tests) and a separate, concurrent fping test (see original post, where
it was running 20-22 msec)?
> Good question. IPv4 vs IPv6 maybe?
I don't think so. Here's fping for both atl.
> > 1. Could flent charts use the `--test-parameter=ping_hosts=...` instead of
> > values from the -H host?
> Well, it should probably show both by default. For now, there's a separate
> plot type you can use to see the extra flows (-p ping_extra).
I don't see how to use the `-p` option. When I
Rich Brown writes:
> Hmmm... The `--test-parameter=ping_hosts=gstatic.com` information
> appears in the command-line summary but not in the charts. Is this
> correct?
>
> If so, the charts display significantly different latency depending on
> which -H host gets used. The Terminal display (bottom
Hmmm... The `--test-parameter=ping_hosts=gstatic.com` information appears in
the command-line summary but not in the charts. Is this correct?
If so, the charts display significantly different latency depending on which -H
host gets used. The Terminal display (bottom) shows fairly consistent pin
Rich Brown writes:
> Ahah! I see the difference. I was testing against `gstatic.com` with
> Terminal; Flent was testing against `flent-fremont.bufferbloat.net`
>
> This seems a pretty big disparity between test results. Is there an
> option to tell Flent to ping a more local host? Thanks.
You c
Ahah! I see the difference. I was testing against `gstatic.com` with Terminal;
Flent was testing against `flent-fremont.bufferbloat.net`
This seems a pretty big disparity between test results. Is there an option to
tell Flent to ping a more local host? Thanks.
```
bash-3.2$ fping -c 1000 gstati
Rich Brown writes:
> Here's the log file: https://pastebin.com/aBXCgjD1
>
> NB I'll be away for the weekend, so won't follow up for a while.
> Thanks.
Looks like those are the actual ping times reported by fping:
[1567795827.309700] flent-fremont.bufferbloat.net : [175], 84 bytes, 95.5 ms
(104
Here's the log file: https://pastebin.com/aBXCgjD1
NB I'll be away for the weekend, so won't follow up for a while. Thanks.
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Rich Brown writes:
> Hmmm, not this time... What else could I check?
>
> ![image](https://user-images.githubusercontent.com/1094930/64439228-7e5a5880-d097-11e9-9068-1f80fd634be7.png)
If you turn on debug logging during the test run (-L option), that log
will include the actual output of the ping
Hmmm, not this time... What else could I check?
![image](https://user-images.githubusercontent.com/1094930/64439228-7e5a5880-d097-11e9-9068-1f80fd634be7.png)
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Rich Brown writes:
> Using Flent 1.3.0 with fping 4.2 on macOS 10.2.6:
>
> I see high ping times (>100 msec in the following report) despite the
> fact that actual ping times (measured by fping during the flent test)
> are 20-30 msec, and none higher that 47 msec. (I am on 7mbps/768kbps
> DSL, so
Using Flent 1.3.0 with fping 4.2 on macOS 10.2.6:
I see high ping times (>100 msec in the following report) despite the fact that
actual ping times (measured by fping during the flent test) are 20-30 msec, and
none higher that 47 msec. (I am on 7mbps/768kbps DSL, so the 6.95mbps seems
accurate.
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