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I could have easily flubbed it but the one time I tried to debug your Broadcast change, I had a deadlock due to one thread having the cm/giant lock and waiting for cs/heap, and another thread vice versa. It's pretty easy to see in the debugger.<BR>
Given the presence of cm/giant on Win32 and not on pthreads, that doesn't seem too surprising.<BR>
?<BR>
And/or I could easily have mismerged.<BR>
<BR>
<BR>
- Jay<BR><BR><BR> <BR>
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From: hosking@cs.purdue.edu<BR>To: jay.krell@cornell.edu<BR>Date: Tue, 29 Sep 2009 10:01:16 -0400<BR>CC: m3devel@elegosoft.com<BR>Subject: Re: [M3devel] win32 threads...now Juno sometimes hangs..<BR><BR>
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<DIV><FONT class=ecxApple-style-span color=#0000ff face="'Gill Sans'"><SPAN style="FONT-SIZE: medium" class=ecxApple-style-span>None of what you say rings any bells. I don't think any of this is in the BroadcastHeap stuff. It *may* be similar to the POSIX hang that I fixed. I'll need to look more closely at the ThreadWin32 code. But you are getting corruption, not a hang, right?</SPAN></FONT></DIV></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></DIV></SPAN></DIV></SPAN></DIV><BR>
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<DIV>On 29 Sep 2009, at 07:19, Jay K wrote:</DIV><BR class=ecxApple-interchange-newline>
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<DIV style="FONT-FAMILY: Verdana; FONT-SIZE: 10pt" class=ecxhmmessage>Hi Tony. Sorry, I had made one large error in ThreadWin32.m3.<BR>At least. The Enter/Leave mechanical replacement error.<BR> <BR>However even with that, the idle thread stuff seemed to cause problems.<BR>It was there forever, I realize.<BR> <BR>Also, I should have done this first, but anyway, later, I tried merging back in your changes from Feb 16.<BR>Somewhat they are moot (lock vs. LockMutex).<BR>Somewhat they are already there (WaitHeap, heapCond => condition).<BR>Somewhat they are trivial (fixing error messages).<BR> <BR>That leaves, in my analysis, the BroadcastHeap change.<BR> <BR>With this change however, /sometimes/ Juno hangs.<BR>Is this, like, somehow equivalent to the Posix hang?<BR>Is the current code the "best"?<BR> <BR>Oh darn..it hangs either way. Just not often.<BR>Could that be "similar" to the pthread problem?<BR>Any chance you can look at it?<BR> <BR>Thanks,<BR> - Jay<BR><BR><BR><BR><BR><BR></DIV></SPAN></BLOCKQUOTE></DIV><BR> </body>
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