gem5 - gem5

Age	Commit message (Collapse)	Author
2011-02-18	inorder: add names and slot #s to res. dprints	Korey Sewell

2011-02-18	inorder: don't overuse getLatency()	Korey Sewell
	resources don't need to call getLatency because the latency is already a member in the class. If there is some type of special case where different instructions impose a different latency inside a resource then we can revisit this and add getLatency() back in
2011-02-18	inorder: cleanup in destructors	Korey Sewell
	cleanup hanging pointers and other cruft in the destructors
2011-02-18	inorder: remove events for zero-cycle resources	Korey Sewell
	if a resource has a zero cycle latency (e.g. RegFile write), then dont allocate an event for it to use
2011-02-18	inorder: update pipeline interface for handling finished resource reqs	Korey Sewell
	formerly, to free up bandwidth in a resource, we could just change the pointer in that resource but at the same time the pipeline stages had visibility to see what happened to a resource request. Now that we are recycling these requests (to avoid too much dynamic allocation), we can't throw away the request too early or the pipeline stage gets bad information. Instead, mark when a request is done with the resource all together and then let the pipeline stage call back to the resource that it's time to free up the bandwidth for more instructions * inteface notes * - When an instruction completes and is done in a resource for that cycle, call done() - When an instruction fails and is done with a resource for that cycle, call done(false) - When an instruction completes, but isnt finished with a resource, call completed() - When an instruction fails, but isnt finished with a resource, call completed(false) * * * inorder: tlbmiss wakeup bug fix
2011-02-18	inorder: remove request map, use request vector	Korey Sewell
	take away all instances of reqMap in the code and make all references use the built-in request vectors inside of each resource. The request map was dynamically allocating a request per instruction. The request vector just allocates N number of requests during instantiation and then the surrounding code is fixed up to reuse those N requests *** setRequest() and clearRequest() are the new accessors needed to define a new request in a resource
2011-02-18	inorder: add valid bit for resource requests	Korey Sewell
	this will allow us to reuse resource requests within a resource instead of always dynamically allocating
2011-02-18	inorder: remove reqRemoveList	Korey Sewell
	we are going to be getting away from creating new resource requests for every instruction so no more need to keep track of a reqRemoveList and clean it up every tick
2011-02-18	inorder: initialize res. req. vectors based on resource bandwidth	Korey Sewell
	first change in an optimization that will stop InOrder from allocating new memory for every instruction's request to a resource. This gets expensive since every instruction needs to access ~10 requests before graduation. Instead, the plan is to allocate just enough resource request objects to satisfy each resource's bandwidth (e.g. the execution unit would need to allocate 3 resource request objects for a 1-issue pipeline since on any given cycle it could have 2 read requests and 1 write request) and then let the instructions contend and reuse those allocated requests. The end result is a smaller memory footprint for the InOrder model and increased simulation performance
2011-02-12	inorder: utilize cached skeds in pipeline	Korey Sewell
	allow the pipeline and resources to use the cached instruction schedule and resource sked iterator
2011-02-04	inorder: fault handling	Korey Sewell
	Maintain all information about an instruction's fault in the DynInst object rather than any cpu-request object. Also, if there is a fault during the execution stage then just save the fault inside the instruction and trap once the instruction tries to graduate
2011-01-07	Replace curTick global variable with accessor functions.	Steve Reinhardt
	This step makes it easy to replace the accessor functions (which still access a global variable) with ones that access per-thread curTick values.
2011-01-07	inorder: replace schedEvent() code with reschedule().	Steve Reinhardt
	There were several copies of similar functions that looked like they all replicated reschedule(), so I replaced them with direct calls. Keeping this separate from the previous cset since there may be some subtle functional differences if the code ever reschedules an event that is scheduled but not squashed (though none were detected in the regressions).
2011-01-07	inorder: get rid of references to mainEventQueue.	Steve Reinhardt
	Events need to be scheduled on the queue assigned to the SimObject, not on the global queue (which should be going away). Also cleaned up a number of redundant expressions that made the code unnecessarily verbose.
2010-06-28	inorder: remove another debug stat	Korey Sewell

2010-06-26	inorder: remove debugging stat	Korey Sewell
	m5 doesnt do stats specific to binary and this resource request stat is probably only useful for people who really know the ins/outs of the model anyway
2010-06-24	inorder: enforce 78-character rule	Korey Sewell

2010-06-23	inorder-stats: add instruction type stats	Korey Sewell
	also, remove inst-req stats as default.good for debugging but in terms of pure processor stats they aren't useful
2010-01-31	inorder: inst count mgmt	Korey Sewell

2010-01-31	inorder: implement split loads	Korey Sewell

2010-01-31	inorder: object cleanup in destructors	Korey Sewell

2010-01-31	inorder-stats: add prereq to basic stat	Korey Sewell
	only show requests processed when the resource is actually in use
2010-01-31	inorder: squash on memory stall	Korey Sewell
	add code to recognize memory stalls in resources and the pipeline as well as squash a thread if there is a stall and we are in the switch on cache miss model
2010-01-31	inorder: init internal debug cpu counters	Korey Sewell
	- cpuEventNum - resReqCount
2009-05-26	types: add a type for thread IDs and try to use it everywhere	Nathan Binkert

2009-05-12	inorder-resources: delete events	Korey Sewell
	make sure unrecognized events in the resource pool are deleted and also delete resource events in destructor
2009-05-12	inorder-tlb: squash insts in TLB correctly	Korey Sewell
	TLB had a bug where if it was stalled and waiting , it would not squash all instructions older than squashed instruction correctly * * *
2009-05-12	inorder-fetch: update model to use predecoder	Korey Sewell

2009-02-10	InOrder: Import new inorder CPU model from MIPS.	Korey Sewell
	This model currently only works in MIPS_SE mode, so it will take some effort to clean it up and make it generally useful. Hopefully people are willing to help make that happen!