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ChristopherJam
Registered: Aug 2004
Posts: 1424 |
Profiling tool?
Has anyone come across or written a tool that lets you execute a chunk of 6502 that then reports back a disassembly where each instruction is annotated with the total number of cycles it consumed?
Something like unp64 but with added instrumentation, basically.
Closest a quick google found for me was a tool for generating such reports from logs produced by a hardware bus monitor.. |
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Krill
Registered: Apr 2002
Posts: 3098 |
Enough to profile "pure" algorithms, converting input to output without side-effects. Which is all you need for now. :) |
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Martin Piper
Registered: Nov 2007
Posts: 739 |
Quote: VICE PDB Monitor 1.0 (get the extra files from github as per comments ) has a limited profiler, Martin did it so I'm not a 100% sure how it works. But I think it uses the memmap operations to count how often an address is executed. So its doesn't give you clocks but it does give hotspots. Its open source so if you wish to extend it to be better, feel free ;)
Currently VICE PDB Monitor uses Vice's mmzap and mmshow between executions or breakpoints to gather execution information and generate a heat map. It's not entirely exact since Vice doesn't trap multiple executions from the same address.
I'm pondering adding some profiling syntax and command line arguments to BDD6502 to allow cycle exact profiling a source level debugging of the same.
One thing I would like to support is support for self modifying code where the opcode is changed. This would be useful for very optimised self modifying code. This does however have challenges for regular profile views because cycle counts can change when the opcode is changed. |
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Slajerek
Registered: May 2015
Posts: 63 |
@oziphantom noted :) all these are not logged yet, the Champ profile reports do not take these things into account. Will add soon, thanks for pointing this out. |
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