[THIN] Re: thread quanta and chkroot.cmd thingy

Hi Brian,

Got into a discussion with Rick Dehlinger about this a few years ago and
called in Mark Russinovich as a referee. 

His opinion was that it does matter. Smaller timeslices (quanta) mean a more
responsive system when you've got a lot of processes, but at the cost of
more context switches per second. So overall excecution efficiency is
reduced a bit, but for applications getting keyboard input for example
(word, excel etc) it means a whole lot smoother input/display. 

One side effect of large quanta is even more incredible end to end slewing
when your'e using a mouse to navigate through a large spreadsheet.

Of couse large quanta make a lot of sense for a small number of i/o
intensive processes, but not terminal services.

Regards,

Rick

Ulrich Mack
rmack@xxxxxxxxxxxxxx
Volante Systems
18 Heussler Terrace, Milton 4064
Queensland Australia
tel +61 7 32467704



-----Original Message-----
From: Brian Madden [mailto:brian@xxxxxxxxxxxxxxx] 
Sent: Tuesday, 16 September 2003 6:33 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: thread quanta and chkroot.cmd thingy


So, after reading all these quanta things, does this setting really make a
difference?

I understand that Tim and/or Kevin are testing to see which setting is
better, but wouldn't it not really matter since an adverse setting would
only be impacted by what an administrator is actively running on the
console?

I would assume that this setting doesn't really matter in the real world?

Brian

Brian Madden
202.302.3657
brian@xxxxxxxxxxxxxxxx
--------
Visit www.brianmadden.com for thin client white papers, books, product
reviews, courseware, and training videos.


-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Timothy Mangan
Sent: Monday, September 15, 2003 1:07 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: thread quanta and chkroot.cmd thingy

Simple test.  The thread that owns the "foreground window" also gets a
priority boost.  You can see this in the performance monitor.  Start a
program (I like "regedit" because it only has one thread), bring up
performance monitor: Add counter Thread: Current Priority for the thread(s)
of the application to be tested.  You will see the priority increase when
the window had the focus.  Works as console of TS session.

tim


-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]
Sent: Monday, September 15, 2003 9:28 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: thread quanta and chkroot.cmd thingy

Here is Kevin's response:

His answer has made me curious. I can prove who is right with a small test.
I'll let you know. Kevin Goodman CTO RTO Software
* +1-678-455-5506 x702
6  +1-678-455-5551*
kevin.goodman@xxxxxxxxxxx
Address:  5400 Laurel Springs Pkwy, #108 Suwanee, GA  30024  USA
http://www.rtosoft.com

Bernd Harzog
CEO
RTO Software, Inc.
bernd.harzog@xxxxxxxxxxx
678-455-5506 x701
www.rtosoft.com

 -----Original Message-----
From:   Ron Oglesby [mailto:roglesby@xxxxxxxxxxxx] 
Sent:   Monday, September 15, 2003 9:22 AM
To:     thin@xxxxxxxxxxxxx
Subject:        [THIN] Re: thread quanta and chkroot.cmd thingy

Ok, no I have to allot some time today to test this.

Ron Oglesby
Senior Technical Architect
 
RapidApp
Office 312.372.7188
Mobile 815.325.7618
email roglesby@xxxxxxxxxxxx
 

-----Original Message-----
From: Andrew Rogers [mailto:Andrew.Rogers@xxxxxxxxxxxxxxxxxx]
Sent: Monday, September 15, 2003 8:12 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: thread quanta and chkroot.cmd thingy

Interesting, RTOSoft vs TMurgent - whos right?

You really know how to ask good questions Brian!! :)

Andrew
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