Tried running the program with +RTS -Nn where n = 2 or more? that should use more OS threads<br><br><div class="gmail_quote">On Sun, Dec 21, 2008 at 10:43 PM, Günther Schmidt <span dir="ltr">&lt;<a href="mailto:redcom@fedoms.com">redcom@fedoms.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br>
<br>
in an application of mine I start a long-running operation in a thread via forkIO so that the UI process doesn&#39;t get blocked.<br>
It just so happens, that the long-running process also takes the CPU to nearly 100% while it runs.<br>
<br>
During that time the run-time system does *not* switch back and forth between the UI-process and the long-running task, it seems that the UI process only gets woken up *after* the high CPU thread finishes completely.<br>

<br>
To the effect of course that it makes no difference at all to the UIs responsiveness whether I use forkIO or not.<br>
<br>
The long running process is pretty atomic, it&#39;s a single query to the database which takes up to a minute to complete so I don&#39;t see a chance to squeeze a &quot;mainIteration&quot; in there.<br>
<br>
What can I do?<br>
<br>
Günther<br>
<br>
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</blockquote></div><br>