Hi all, Can anyone indicate how to extract performance counters such as the number of DRAM read operations, the number of DRAM write operations, the number of times a page miss occurs, etc.? Inside src/mem/mem_ctrl.cc, MemCtrl::recvTimingReq( ) method, there are two methods for inserting new read and write operations into their respective queues, namely addToReadQueue( ) and addToWriteQueue( ). Can the #reads and #writes can be obtained from here? And what about # page hits/misses? Any help is appreciated. Regards, Aritra

On 9/8/2023 2:55 AM, Aritra Bagchi via gem5-users wrote: > Hi all, > > Can anyone indicate how to extract performance counters such as the number of DRAM read operations, > the number of DRAM write operations, the number of times a page miss occurs, etc.? > > Inside src/mem/mem_ctrl.cc, MemCtrl::recvTimingReq( ) method, there are two methods for inserting > new read and write operations into their respective queues, namely addToReadQueue( ) > and addToWriteQueue( ). Can the #reads and #writes can be obtained from here? And what about # page > hits/misses? Any help is appreciated. The way things generally work in gem5 is that you get a stats dump at the end of a run. There are also ways to request such dumps more frequently. You get a lot of details about accesses to caches and memories. Are you looking at stats dumps and not seeing what you hope for? Best - Eliot Moss

Hi Eliot, In the stats, I got some of the counters I wanted. In the source code, now I can look at how they are computed and get ideas. I wanted these data not at the end of simulation, but at intermediate times, but I could obtain them by controlling some parameters. Thanks, Aritra On Fri, Sep 8, 2023 at 6:06 PM Eliot Moss <moss@cs.umass.edu> wrote: > On 9/8/2023 2:55 AM, Aritra Bagchi via gem5-users wrote: > > Hi all, > > > > Can anyone indicate how to extract performance counters such as the > number of DRAM read operations, > > the number of DRAM write operations, the number of times a page miss > occurs, etc.? > > > > Inside src/mem/mem_ctrl.cc, MemCtrl::recvTimingReq( ) method, there are > two methods for inserting > > new read and write operations into their respective queues, > namely addToReadQueue( ) > > and addToWriteQueue( ). Can the #reads and #writes can be obtained from > here? And what about # page > > hits/misses? Any help is appreciated. > > The way things generally work in gem5 is that you get a stats dump at > the end of a run. There are also ways to request such dumps more > frequently. > You get a lot of details about accesses to caches and memories. Are you > looking at stats dumps and not seeing what you hope for? > > Best - Eliot Moss >