On Mon, 24 Jul 2017 16:41:12 -0700
Yuchung Cheng wrote:
> On Mon, Jul 24, 2017 at 11:29 AM, Neal Cardwell wrote:
> > On Mon, Jul 24, 2017 at 2:17 PM, Yuchung Cheng wrote:
> >> On Sun, Jul 23, 2017 at 7:37 PM, Neal Cardwell
> >> wrote:
> >>> On Sun, Jul 23, 2017 at 10:36 PM, Neal Cardwell
On Mon, Jul 24, 2017 at 11:29 AM, Neal Cardwell wrote:
> On Mon, Jul 24, 2017 at 2:17 PM, Yuchung Cheng wrote:
>> On Sun, Jul 23, 2017 at 7:37 PM, Neal Cardwell wrote:
>>> On Sun, Jul 23, 2017 at 10:36 PM, Neal Cardwell
>>> wrote:
> ...
What if we call the field tp->prior_cwnd? Then at le
On Mon, Jul 24, 2017 at 2:17 PM, Yuchung Cheng wrote:
> On Sun, Jul 23, 2017 at 7:37 PM, Neal Cardwell wrote:
>> On Sun, Jul 23, 2017 at 10:36 PM, Neal Cardwell wrote:
...
>>> What if we call the field tp->prior_cwnd? Then at least we'd have some
>>> nice symmetry:
>>>
>>> - tp->snd_cwnd, which
On Sun, Jul 23, 2017 at 7:37 PM, Neal Cardwell wrote:
> On Sun, Jul 23, 2017 at 10:36 PM, Neal Cardwell wrote:
>> On Fri, Jul 21, 2017 at 5:16 PM, Yuchung Cheng wrote:
>>> On Fri, Jul 21, 2017 at 1:46 PM, Neal Cardwell
>>> wrote:
On Fri, Jul 21, 2017 at 4:27 PM, Lisong Xu wrote:
>
>
On Sun, Jul 23, 2017 at 10:36 PM, Neal Cardwell wrote:
> On Fri, Jul 21, 2017 at 5:16 PM, Yuchung Cheng wrote:
>> On Fri, Jul 21, 2017 at 1:46 PM, Neal Cardwell wrote:
>>> On Fri, Jul 21, 2017 at 4:27 PM, Lisong Xu wrote:
Hi Yuchung,
This test scenario is only one example t
On Fri, Jul 21, 2017 at 5:16 PM, Yuchung Cheng wrote:
> On Fri, Jul 21, 2017 at 1:46 PM, Neal Cardwell wrote:
>> On Fri, Jul 21, 2017 at 4:27 PM, Lisong Xu wrote:
>>>
>>> Hi Yuchung,
>>>
>>> This test scenario is only one example to trigger this bug. In general, as
>>> long as cwnd <4, the undo
On Fri, Jul 21, 2017 at 1:46 PM, Neal Cardwell wrote:
> On Fri, Jul 21, 2017 at 4:27 PM, Lisong Xu wrote:
>>
>> Hi Yuchung,
>>
>> This test scenario is only one example to trigger this bug. In general, as
>> long as cwnd <4, the undo function has this bug.
>
>
> Yes, personally I agree that this
On Fri, Jul 21, 2017 at 4:27 PM, Lisong Xu wrote:
>
> Hi Yuchung,
>
> This test scenario is only one example to trigger this bug. In general, as
> long as cwnd <4, the undo function has this bug.
Yes, personally I agree that this seems like an issue that is general
enough to be worth fixing. In
Hi Yuchung,
This test scenario is only one example to trigger this bug. In
generally, as long as cwnd <4, the undo function has this bug.
This would not be a problem for a normal network. But might be an issue,
if the network is highly congested (e.g., many many TCP flows with small
cwnd <4)
Hi Yuchung,
This test scenario is only one example to trigger this bug. In general,
as long as cwnd <4, the undo function has this bug.
This would not be a problem for a normal network. But might be an issue,
if the network is highly congested (e.g., many many TCP flows with small
cwnd <4).
On Thu, Jul 20, 2017 at 2:28 PM, Wei Sun wrote:
> Hi Yuchung,
>
> Sorry for the confusion. The test case was adapted from an old DSACK
> test case (i.e., forget to remove something).
>
> Attached is a new and simple one. Thanks
Note that the test scenario is fairly rare IMO: the connection first
Hi Yuchung,
Sorry for the confusion. The test case was adapted from an old DSACK
test case (i.e., forget to remove something).
Attached is a new and simple one. Thanks
On Wed, Jul 19, 2017 at 2:31 PM, Yuchung Cheng wrote:
> On Tue, Jul 18, 2017 at 2:36 PM, Wei Sun wrote:
>> Hi there,
>>
>>
On Tue, Jul 18, 2017 at 2:36 PM, Wei Sun wrote:
> Hi there,
>
> We find a buggy behavior when using Linux TCP Reno and HTCP in low
> bandwidth or highly congested network environments.
>
> In a simple word, their undo functions may mistakenly double the cwnd,
> leading to a more aggressive behavio
Hi there,
We find a buggy behavior when using Linux TCP Reno and HTCP in low
bandwidth or highly congested network environments.
In a simple word, their undo functions may mistakenly double the cwnd,
leading to a more aggressive behavior in a highly congested scenario.
The detailed reason:
The
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