Webware for Python

OK, I admit to knowing almost nothing about the way tasks are allocated 
between threads in WebWare, but I happened to do a "ps axf" today on a 
machine that has been running  for about 8 months, and saw this:

 1622 ?        SN     0:00 /bin/sh ./AppServer
19647 ?        SN    49:47  \_ python Launch.py ThreadedAppServer
19648 ?        SN     1:48      \_ python Launch.py ThreadedAppServer
19649 ?        SN   142:38          \_ python Launch.py ThreadedAppServer
19650 ?        SN     0:00          \_ python Launch.py ThreadedAppServer
19651 ?        SN   117:47          \_ python Launch.py ThreadedAppServer
19652 ?        SN     0:00          \_ python Launch.py ThreadedAppServer
19653 ?        SN     0:00          \_ python Launch.py ThreadedAppServer
19654 ?        SN     0:00          \_ python Launch.py ThreadedAppServer
19655 ?        SN     0:00          \_ python Launch.py ThreadedAppServer
19656 ?        SN     0:00          \_ python Launch.py ThreadedAppServer

Notice the uneven distribution of CPU times.  Now, if the threads are 
tasked sequentially, so that thread 2 is used only if thread 1 is 
already busy, then this makes sense; it says I often had 2 simultaneous 
requests, but never more than 2.

Is that actually how tasks are assigned to threads?

-- 
- Tim Roberts, timr@...
  Providenza & Boekelheide, Inc.

Re: [Webware-discuss] CPU Usage Pattern From: Frank Barknecht <fbar@fo...> - 2004-07-07 20:14 Hallo, Tim Roberts hat gesagt: // Tim Roberts wrote: > OK, I admit to knowing almost nothing about the way tasks are allocated > between threads in WebWare, but I happened to do a "ps axf" today Cool, I didn't know these options. > on a machine that has been running for about 8 months, and saw > this: > > 1622 ? SN 0:00 /bin/sh ./AppServer 19647 ? SN > 49:47 \_ python Launch.py ThreadedAppServer 19648 ? SN > 1:48 \_ python Launch.py ThreadedAppServer 19649 ? SN > 142:38 \_ python Launch.py ThreadedAppServer 19650 ? > SN 0:00 \_ python Launch.py ThreadedAppServer 19651 ? > SN 117:47 \_ python Launch.py ThreadedAppServer 19652 ? > SN 0:00 \_ python Launch.py ThreadedAppServer 19653 ? > SN 0:00 \_ python Launch.py ThreadedAppServer 19654 ? > SN 0:00 \_ python Launch.py ThreadedAppServer 19655 ? > SN 0:00 \_ python Launch.py ThreadedAppServer 19656 ? > SN 0:00 \_ python Launch.py ThreadedAppServer > > Notice the uneven distribution of CPU times. I get a very similar picture with a slighty more loaded server. There are 2 out of 10 threads that appear to never be used, one is used a lot, the others only a little bit. This could be used to tune servers a bit. In your case it might not be necessary to run all those threads. Ciao -- Frank Barknecht _ ______footils.org__

Re: [Webware-discuss] CPU Usage Pattern From: Frank Barknecht <fbar@fo...> - 2004-07-07 21:30 Hallo, Frank Barknecht hat gesagt: // Frank Barknecht wrote: > I get a very similar picture with a slighty more loaded server. There > are 2 out of 10 threads that appear to never be used, one is used a > lot, the others only a little bit. This could be used to tune servers > a bit. In your case it might not be necessary to run all those > threads. I should add, this is on Debian stable with Python 2.2 Ciao -- Frank Barknecht _ ______footils.org__

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