RE: Running tasklist /m in cygwin hangs

RE: Running tasklist /m in cygwin hangs

[Saurabh T]

Hi,
Running
 "tasklist /m file.dll" hangs in Cygwin even though it works perfectly 
fine in the cmd window. Is there any reason for this? I am using a 
somewhat older cygwin (1.7.25) on a Windows 7 box, and do not want to 
upgrade unless newer cygwin doesnt show the problem. Thank you. 		 	   		   		 	   		  
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Re: Running tasklist /m in cygwin hangs

[Andrey Repin]

Greetings, Saurabh T!

> Running
>  "tasklist /m file.dll" hangs in Cygwin

First, mintty (I assume you did mean that) is not "Cygwin" itself.

> even though it works perfectly fine in the cmd window.

I hope you did mean native console by that.

> Is there any reason for this? I am using a
> somewhat older cygwin (1.7.25) on a Windows 7 box, and do not want to 
> upgrade unless newer cygwin doesnt show the problem. Thank you.

$ tasklist /m normaliz.DLL | iconv -f CP866

Имя образа                     PID Модули
========================= ======== ============================================
taskhost.exe                  3492 normaliz.DLL
litestep.exe                  2172 normaliz.DLL
spideragent.exe               3336 normaliz.DLL

Results are the same if running in mintty or native console.
No hangs can be seen from my side.
CYGWIN_NT-6.1 daemon2 1.7.35(0.287/5/3) 2015-03-04 12:09 x86_64 Cygwin
CYGWIN_NT-6.1 daemon2 2.0.0(0.287/5/3) 2015-04-15 17:39 x86_64 Cygwin


-- 
With best regards,
Andrey Repin
Wednesday, April 15, 2015 22:07:13

Sorry for my terrible english...

RE: Running tasklist /m in cygwin hangs

[Saurabh T]

I can confirm it still hangs for me with 1.7.35. I am using the 32 bit (i686) Cygwin which is the only difference from Andrey's.




----------------------------------------
> Date: Wed, 15 Apr 2015 22:15:57 +0300
> From: anrdaemon@yandex.ru
> To: saurabh@hotmail.com; cygwin@cygwin.com
> Subject: Re: Running tasklist /m in cygwin hangs
>
> Greetings, Saurabh T!
>
>> Running
>> "tasklist /m file.dll" hangs in Cygwin
>
> First, mintty (I assume you did mean that) is not "Cygwin" itself.
>
>> even though it works perfectly fine in the cmd window.
>
> I hope you did mean native console by that.
>
>> Is there any reason for this? I am using a
>> somewhat older cygwin (1.7.25) on a Windows 7 box, and do not want to
>> upgrade unless newer cygwin doesnt show the problem. Thank you.
>
> $ tasklist /m normaliz.DLL | iconv -f CP866
>
> Имя образа PID Модули
> ========================= ======== ============================================
> taskhost.exe 3492 normaliz.DLL
> litestep.exe 2172 normaliz.DLL
> spideragent.exe 3336 normaliz.DLL
>
> Results are the same if running in mintty or native console.
> No hangs can be seen from my side.
> CYGWIN_NT-6.1 daemon2 1.7.35(0.287/5/3) 2015-03-04 12:09 x86_64 Cygwin
> CYGWIN_NT-6.1 daemon2 2.0.0(0.287/5/3) 2015-04-15 17:39 x86_64 Cygwin
>
>
> --
> With best regards,
> Andrey Repin
> Wednesday, April 15, 2015 22:07:13
>
> Sorry for my terrible english...
 		 	   		  
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Re: Running tasklist /m in cygwin hangs

[Marco Atzeri]

On 4/17/2015 5:23 PM, Saurabh T wrote:
> I can confirm it still hangs for me with 1.7.35. I am using the 32 bit (i686) Cygwin which is the only difference from Andrey's.
>

on  $ uname -vrsm
CYGWIN_NT-6.1-WOW 1.7.35(0.287/5/3) 2015-03-04 12:07 i686

It is only a bit slow (both mintty and console)

$ time tasklist /m normaliz.DLL

Image Name                     PID Modules
========================= ======== 
============================================
ZenworksWindowsService.ex     1424 normaliz.dll
AppleMobileDeviceService.     1616 normaliz.dll
explorer.exe                  2520 normaliz.dll
PanGPS.exe                    3276 normaliz.dll
PanGPA.exe                    3420 normaliz.dll
iTunesHelper.exe              3544 normaliz.dll
Smc.exe                       5008 normaliz.dll

real    1m25.565s
user    0m0.015s
sys     0m0.046s

It seems some type of timeout in the interaction of this
windows utility and cygwin

Regards
Marco


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Re: Running tasklist /m in cygwin hangs

[Andrey Repin]

Greetings, Marco Atzeri!

>> I can confirm it still hangs for me with 1.7.35. I am using the 32 bit (i686) Cygwin which is the only difference from Andrey's.
>>

> on  $ uname -vrsm
> CYGWIN_NT-6.1-WOW 1.7.35(0.287/5/3) 2015-03-04 12:07 i686

> It is only a bit slow (both mintty and console)

> $ time tasklist /m normaliz.DLL

> Image Name                     PID Modules
> ========================= ======== 
> ============================================
> ZenworksWindowsService.ex     1424 normaliz.dll
> AppleMobileDeviceService.     1616 normaliz.dll
> explorer.exe                  2520 normaliz.dll
> PanGPS.exe                    3276 normaliz.dll
> PanGPA.exe                    3420 normaliz.dll
> iTunesHelper.exe              3544 normaliz.dll
> Smc.exe                       5008 normaliz.dll

> real    1m25.565s

Oh... wow...

real    0m0.088s

[x].[x]

> user    0m0.015s
> sys     0m0.046s

> It seems some type of timeout in the interaction of this
> windows utility and cygwin

Was it native console or pty ?


-- 
With best regards,
Andrey Repin
Saturday, April 18, 2015 02:02:39

Sorry for my terrible english...


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Re: Running tasklist /m in cygwin hangs

[Marco Atzeri]

On 4/18/2015 1:05 AM, Andrey Repin wrote:
> Greetings, Marco Atzeri!
>
>>> I can confirm it still hangs for me with 1.7.35. I am using the 32 bit (i686) Cygwin which is the only difference from Andrey's.
>>>
>
>> on  $ uname -vrsm
>> CYGWIN_NT-6.1-WOW 1.7.35(0.287/5/3) 2015-03-04 12:07 i686
>
>> It is only a bit slow (both mintty and console)
>
>> $ time tasklist /m normaliz.DLL
>
>> Image Name                     PID Modules
>> ========================= ========
>> ============================================
>> ZenworksWindowsService.ex     1424 normaliz.dll
>> AppleMobileDeviceService.     1616 normaliz.dll
>> explorer.exe                  2520 normaliz.dll
>> PanGPS.exe                    3276 normaliz.dll
>> PanGPA.exe                    3420 normaliz.dll
>> iTunesHelper.exe              3544 normaliz.dll
>> Smc.exe                       5008 normaliz.dll
>
>> real    1m25.565s
>
> Oh... wow...
>
> real    0m0.088s
>
> [x].[x]
>
>> user    0m0.015s
>> sys     0m0.046s
>
>> It seems some type of timeout in the interaction of this
>> windows utility and cygwin
>
> Was it native console or pty ?
>

on 32bit cygwin on 64bit W7
cmd+bash and mintty+bash have the same long time.

As the effect is around 10 sec per line and "tasklist.exe" is looking
which process is using a certain dll, I presume that there is a negative
interactions (timeout, double sleep ?).

cmd alone or 64 bit cygwin has no delay effect.

However on 64bit you can compare

/cygdrive/c/windows/SysWOW64/tasklist.exe /m normaliz.dll
/cygdrive/c/windows/System32/tasklist.exe /m normaliz.dll

timing ;-)

Regards
Marco

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Re: Running tasklist /m in cygwin hangs

[Andrey Repin]

Greetings, Marco Atzeri!

>>>> I can confirm it still hangs for me with 1.7.35. I am using the 32 bit (i686) Cygwin which is the only difference from Andrey's.
>>>>
>>
>>> on  $ uname -vrsm
>>> CYGWIN_NT-6.1-WOW 1.7.35(0.287/5/3) 2015-03-04 12:07 i686
>>
>>> It is only a bit slow (both mintty and console)
>>
>>> $ time tasklist /m normaliz.DLL
>>> real    1m25.565s
>>
>> Oh... wow...
>>
>> real    0m0.088s
>>
>> [x].[x]
>>
>>> user    0m0.015s
>>> sys     0m0.046s
>>
>>> It seems some type of timeout in the interaction of this
>>> windows utility and cygwin
>>
>> Was it native console or pty ?
>>

> on 32bit cygwin on 64bit W7
> cmd+bash and mintty+bash have the same long time.

> As the effect is around 10 sec per line and "tasklist.exe" is looking
> which process is using a certain dll, I presume that there is a negative
> interactions (timeout, double sleep ?).

> cmd alone or 64 bit cygwin has no delay effect.

> However on 64bit you can compare

True.

> /cygdrive/c/windows/SysWOW64/tasklist.exe /m normaliz.dll
> /cygdrive/c/windows/System32/tasklist.exe /m normaliz.dll

> timing ;-)

It isn't as slow as yours, but definitely slow.

$ time /c/windows/System32/tasklist.exe /m normaliz.dll | iconv -f CP866
  ...skip...
real    0m0.093s
user    0m0.015s
sys     0m0.030s

$ time /c/windows/SysWOW64/tasklist.exe /m normaliz.dll | iconv -f CP866
  ...skip...
real    0m15.560s
user    0m0.000s
sys     0m0.045s


-- 
With best regards,
Andrey Repin
Saturday, April 18, 2015 17:42:41

Sorry for my terrible english...


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Re: Running tasklist /m in cygwin hangs

[Bryan Berns]

On Wed, Apr 15, 2015 at 1:52 PM, Saurabh T <saurabh@hotmail.com> wrote:
> Hi,
> Running
>  "tasklist /m file.dll" hangs in Cygwin even though it works perfectly
> fine in the cmd window. Is there any reason for this? I am using a
> somewhat older cygwin (1.7.25) on a Windows 7 box, and do not want to
> upgrade unless newer cygwin doesnt show the problem. Thank you.
> --
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>

It doesn't hang for me, but it is significantly slower.  I'm running
the latest development release.  Tasklist appears to be WMI heavy.  I
ran Process Monitor and it appears that when running tasklist /m under
bash, WMI is significantly more active.  WMI actually opens tzres.dll
(Time Zone Resources) about 150,000 times vice a mere 800 times when
executing through a standard command prompt.  Moreover, WMI really
doesn't appear to be doing much of anything with tzres.dll... just
open/close/open/close/open/close.  Very curious indeed.

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