2010/5/18 Stéphane Ducasse <stephane.ducasse@inria.fr>:
this is cool We could then build tools for you :) Boxes are packages, little squares are classes
Blue: classes with no instances Green: classes with instances, but no used Red: classes with instances and at least one used
just brainstorming with mariano
Interesting. Could it draw with pink, the ones who has no instances, but having a methods invocations (an abstract superclasses can have no instances, but can be under heavy use).
On May 17, 2010, at 10:40 PM, Eliot Miranda wrote:
On Mon, May 17, 2010 at 11:30 AM, Stéphane Ducasse <stephane.ducasse@inria.fr> wrote:
On Ma
bytes 28 to 31: image flags, conventional VMs use only bit 0, Cog also uses bits 1 through 4        bit 0: 1 => open full screen, 0 => open using width & height        bit 1: 1 => image floats are in little-endian format, 0=> image floats are in big-endian format        bit 2: 1 => Process's 4th inst var (after myList) is threadId to be used by the VM for overlapped calls
       bit 3: 1 => set the flag bit on methods that the VM will only interpret (because they're considered too big to JIT)        bit 4: 1 => preempting a process does not put it to the back of its run queue
I was not clear how to read     bit 3: 1 this information is not in the compiledMethods?
For the Cog JIT I want to measure which methods get interpreted to determine the threshold at which to decide to JIT methods. Â It makes little sense to JIT methods that are large and only executed once, typically class initialization methods. A simple criterion is to set a limit on the number of literals in a method. Â But I still need to know whether my threshold is affecting frequently used methods. Â So I added the option of setting the flag bit in any method which the JIT refuses to compile because it has too many literals. Â Since I need to see which methods are interpreted on start-up putting a flag in the image header was convenient. Â The effect is that the JIT will set the flag bit on any method it refuses to JIT. Â I can then browse these in the image and decide whether any are important and adjust the threshold accordingly. Â Arguably this should be a command line argument, not an image header flag.
Stef
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