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Subject:	Re: cygrunsrv + sshd + rsync = 20 times too slow -- throttled?
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From:	Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Organization:	Systematic Software
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Date:	Tue, 31 Aug 2021 15:29:39 -0600
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I've found you must also copy the matching cygwin-console-helper.exe 
for everything to work correctly!

On 2021-08-31 14:23, Chris Roehrig wrote:
> I did a 'git pull' of the latest topic/pipe and rebuilt and I now do indeed get 100MB/s transfers using both rsync and scp (without pipe_byte).
> (It turns out last time I forgot 'make install'  -- Doh!)
> 
> I still get the procps error however.

> On Tue Aug 31 2021, at 12:53 PM, Chris Roehrig wrote:
>> Thanks, I did some more tests:
>> 	scp also shows no improvement with topic/pipe.    I tried running cygsshd with CYGWIN=pipe_byte as well as empty (in the registry HKLM/SYSTEM/CurrentControlSet/Services/cygsshd/Parameters/Environment/), using net stop cygsshd + net start cygsshd to restart it.   Not sure if that CYGWIN only applies to cygsshd or to all cygwin tasks.
>>
>> I get the procps error just running 'procps' command with no args from mintty (/usr/bin/procps).     Looking at the procps-ng source (procps-ng 3.3.17-1 is what setup_x86_64 reports as my installed package), it appears to be a mmap() failure.
>>
>> I'm wondering if I built/installed cygwin1.dll correctly because I don't get the procps error using the latest stock cygwin1.dll as installed by setup_

>> On Tue Aug 31 2021, at 12:05 PM, Ken Brown via Cygwin wrote:
>>> On 8/30/2021 7:58 PM, Chris Roehrig wrote:
>>>> I got it to build and tried out the topic/pipe branch (checked out on Monday around 4:30pm PDT):
>>>> 1.  I didn't see any improvement in my sshd+rsync time, still 3-4 MB/sec.
>>>> 2.  I get the following error from procps:   procps:ps/output.c:2195: please report this bug
>>>> (I also get this using the main branch build).
>>>> I first updated my cygwin normally using setup-x86_64.exe, then built and copied only the cygwin1.dll into /bin from the install/bin directory (quitting all cygwin tasks first).
>>>
>>> Thanks for testing.
>>>
>>> We're still working on this.  (The discussion has moved to the cygwin-developers mailing list.)  I'll let you know when it's stable, and maybe you can try again.
>>>
>>> As to the procps error, can you give details so that someone can try to reproduce it and debug it?

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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