It looks like the number of CUs is being set to 8. The simulator is segfaulting for some other reason, and you haven't shown enough info to know why it is segfaulting.
-----Original Message----- From: gem5-dev <[email protected]> On Behalf Of Tsungtai Yeh Sent: Saturday, July 28, 2018 5:41 PM To: [email protected] Subject: Re: [gem5-dev] How to increase the default CU counts in GCN_X86 gem5-apu? I changed the default value of “—num-compute-units” to 8 in apu_se.py. I still got the segmentation fault. The following is the trace from gem5 simulation. The 8 CUs are initialized successfully, but get the failure during the instruction fetching stage. — Tsung Tai parser.add_option("-u", "--num-compute-units", type="int", default=8, help="number of GPU compute units") 51620963000: system.cpu2.CUs0: trueWgSize[0] = 256 51620963000: system.cpu2.CUs0: trueWgSize[1] = 1 51620963000: system.cpu2.CUs0: trueWgSize[2] = 1 51620963000: system.cpu2.CUs0: trueWgSizeTotal = 256 51620963000: system.cpu2.CUs0: Free WF slots = 36, Mapped WFs = 0, VGPR Availability = 0, SGPR Availability = 0 51620963000: system.cpu2.CUs1: trueWgSize[0] = 256 51620963000: system.cpu2.CUs1: trueWgSize[1] = 1 51620963000: system.cpu2.CUs1: trueWgSize[2] = 1 51620963000: system.cpu2.CUs1: trueWgSizeTotal = 256 51620963000: system.cpu2.CUs1: Free WF slots = 36, Mapped WFs = 0, VGPR Availability = 0, SGPR Availability = 0 51620963000: system.cpu2.CUs2: trueWgSize[0] = 256 51620963000: system.cpu2.CUs2: trueWgSize[1] = 1 51620963000: system.cpu2.CUs2: trueWgSize[2] = 1 51620963000: system.cpu2.CUs2: trueWgSizeTotal = 256 51620963000: system.cpu2.CUs2: Free WF slots = 36, Mapped WFs = 0, VGPR Availability = 0, SGPR Availability = 0 51620963000: system.cpu2.CUs3: trueWgSize[0] = 256 51620963000: system.cpu2.CUs3: trueWgSize[1] = 1 51620963000: system.cpu2.CUs3: trueWgSize[2] = 1 51620963000: system.cpu2.CUs3: trueWgSizeTotal = 256 51620963000: system.cpu2.CUs3: Free WF slots = 36, Mapped WFs = 0, VGPR Availability = 0, SGPR Availability = 0 51620963000: system.cpu2.CUs4: trueWgSize[0] = 256 51620963000: system.cpu2.CUs4: trueWgSize[1] = 1 51620963000: system.cpu2.CUs4: trueWgSize[2] = 1 51620963000: system.cpu2.CUs4: trueWgSizeTotal = 256 51620963000: system.cpu2.CUs4: Free WF slots = 36, Mapped WFs = 0, VGPR Availability = 0, SGPR Availability = 0 51620963000: system.cpu2.CUs5: trueWgSize[0] = 256 51620963000: system.cpu2.CUs5: trueWgSize[1] = 1 51620963000: system.cpu2.CUs5: trueWgSize[2] = 1 51620963000: system.cpu2.CUs5: trueWgSizeTotal = 256 51620963000: system.cpu2.CUs5: Free WF slots = 36, Mapped WFs = 0, VGPR Availability = 0, SGPR Availability = 0 51620963000: system.cpu2.CUs6: trueWgSize[0] = 256 51620963000: system.cpu2.CUs6: trueWgSize[1] = 1 51620963000: system.cpu2.CUs6: trueWgSize[2] = 1 51620963000: system.cpu2.CUs6: trueWgSizeTotal = 256 51620963000: system.cpu2.CUs6: Free WF slots = 36, Mapped WFs = 0, VGPR Availability = 0, SGPR Availability = 0 51620963000: system.cpu2.CUs7: trueWgSize[0] = 256 51620963000: system.cpu2.CUs7: trueWgSize[1] = 1 51620963000: system.cpu2.CUs7: trueWgSize[2] = 1 51620963000: system.cpu2.CUs7: trueWgSizeTotal = 256 51620963000: system.cpu2.CUs7: Free WF slots = 36, Mapped WFs = 0, VGPR Availability = 0, SGPR Availability = 0 51620963000: system.cpu0.workload.drivers.device.dispatcher: kernel 0 failed to launch 51620963000: system.cpu0.workload.drivers.device.dispatcher: Returning 0 Kernels 51620964000: global: WF[0][0]: Id28 reserved fetch buffer entry for PC = 0x7ffeebde9100 51620964000: global: CU7: WF[0][0]: Id28: Initiate fetch from pc: 140732855652608 0x7ffeebde9100 51620964000: global: CU7: WF[0][0]: Initiating fetch translation: 0x7ffeebde9100 gem5 has encountered a segmentation fault! ________________________________ From: Tsungtai Yeh Sent: Friday, July 27, 2018 7:20:55 AM To: [email protected] Cc: [email protected] Subject: [gem5-dev] How to increase the default CU counts in GCN_X86 gem5-apu? I tried to increase the CU counts to 32 in the gem5-apu. However, I found I could not only increase "--num-compute-units" default count (4). Do you know any other parameters I also need to change when increasing the CU counts? Thank you. _______________________________________________ gem5-dev mailing list [email protected] http://m5sim.org/mailman/listinfo/gem5-dev _______________________________________________ gem5-dev mailing list [email protected] http://m5sim.org/mailman/listinfo/gem5-dev
