jperf3

jperf3

[FwAdmin]

Hi cygwin,

I'll report a problem using iperf on windows 10 x64.

Probe is iperf3 runnung on an linux.
With a command line tool on windows 10 iperf runs without any problems.

Problems with iperfcygwin using java.

See here:

bin/iperf3.exe -c a.b.c.d -P 1 -i 1 -p 5201 -f m -t 10
    1579 [main] iperf3 6620 find_fast_cwd: WARNING: Couldn't compute 
FAST_CWD pointer.  Please report this problem to
the public mailing list cygwin@cygwin.com
Done.

And my CPU runs on 100% when starting "Run iperf3".

y.s. fwadmin

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Re: jperf3

[Douglas Coup]

On 7/1/2017 7:27 AM, FwAdmin wrote:
> Hi cygwin,
>
> I'll report a problem using iperf on windows 10 x64.
>
> Probe is iperf3 runnung on an linux.
> With a command line tool on windows 10 iperf runs without any problems.
>
> Problems with iperfcygwin using java.
>
> See here:
>
> bin/iperf3.exe -c a.b.c.d -P 1 -i 1 -p 5201 -f m -t 10
>    1579 [main] iperf3 6620 find_fast_cwd: WARNING: Couldn't compute 
> FAST_CWD pointer.  Please report this problem to
> the public mailing list cygwin@cygwin.com
> Done.
>
> And my CPU runs on 100% when starting "Run iperf3".
>
> y.s. fwadmin

I had the FAST_CWD problem several years ago after a Windows upgrade.  I 
installed the latest Cygwin, and the problem stopped happening.

Regards,

Doug Coup
>
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>


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Re: jperf3

[Marco Atzeri]

On 03/07/2017 15:29, Douglas Coup wrote:
> On 7/1/2017 7:27 AM, FwAdmin wrote:
>> Hi cygwin,
>>
>> I'll report a problem using iperf on windows 10 x64.
>>
>> Probe is iperf3 runnung on an linux.
>> With a command line tool on windows 10 iperf runs without any problems.
>>
>> Problems with iperfcygwin using java.
>>
>> See here:
>>
>> bin/iperf3.exe -c a.b.c.d -P 1 -i 1 -p 5201 -f m -t 10
>>    1579 [main] iperf3 6620 find_fast_cwd: WARNING: Couldn't compute
>> FAST_CWD pointer.  Please report this problem to
>> the public mailing list cygwin@cygwin.com
>> Done.
>>
>> And my CPU runs on 100% when starting "Run iperf3".
>>
>> y.s. fwadmin
>
> I had the FAST_CWD problem several years ago after a Windows upgrade.  I
> installed the latest Cygwin, and the problem stopped happening.
>
> Regards,
>
> Doug Coup
>>

he is mentioning windows 10 x64 and having the problem only with Java.
I assume that the Java machine is triggering an old compatibility
style that cygwin recognizes as old windows.
It seems not the usual FAST_CWD problem of third party.

Marco


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