[M3devel] win32 threads...now Juno sometimes hangs..

[Tony Hosking]

Hmm.  Possibly.  I'll look more closely.

On 29 Sep 2009, at 10:14, Jay K wrote:

> 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.
> Given the presence of cm/giant on Win32 and not on pthreads, that  
> doesn't seem too surprising.
> ?
> And/or I could easily have mismerged.
>
>
>  - Jay
>
>
>
> From: hosking at cs.purdue.edu
> To: jay.krell at cornell.edu
> Date: Tue, 29 Sep 2009 10:01:16 -0400
> CC: m3devel at elegosoft.com
> Subject: Re: [M3devel] win32 threads...now Juno sometimes hangs..
>
> 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?
>
> On 29 Sep 2009, at 07:19, Jay K wrote:
>
> Hi Tony. Sorry, I had made one large error in ThreadWin32.m3.
> At least. The Enter/Leave mechanical replacement error.
>
> However even with that, the idle thread stuff seemed to cause  
> problems.
> It was there forever, I realize.
>
> Also, I should have done this first, but anyway, later, I tried  
> merging back in your changes from Feb 16.
> Somewhat they are moot (lock vs. LockMutex).
> Somewhat they are already there (WaitHeap, heapCond => condition).
> Somewhat they are trivial (fixing error messages).
>
> That leaves, in my analysis, the BroadcastHeap change.
>
> With this change however, /sometimes/ Juno hangs.
> Is this, like, somehow equivalent to the Posix hang?
> Is the current code the "best"?
>
> Oh darn..it hangs either way. Just not often.
> Could that be "similar" to the pthread problem?
> Any chance you can look at it?
>
> Thanks,
>  - Jay
>
>
>
>
>
>
>

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