Hello gem5 community,
I'm afraid my simulation is getting stuck when restoring KVM checkpoints with
DerivO3CPU while running a multithreaded application.
I'm running a full system with x86. Simulation is ok when restoring with
AtomicSimpleCPU (i.e., output prints all expected info).
I tried to run gem5 with DerivO3CPU with --debug-flags=Exec to get more info.
Early in the simulation I got the following error while the Exec flag was being
printed:
1879968079707500: system.cpu0: T0 : 0xffffffff8151a1b0
@__cpuidle_text_start+24.32775 : Microcode_ROM : br 0x800a : IntAlu :
1879968079707500: system.cpu2: T0 : 0xffffffff8151a1b0
@__cpuidle_text_start+24.32775 : Microcode_ROM : br 0x800a : IntAlu :
1879968079707500: system.cpu3: T0 : 0xffffffff81601ea0
@smp_apic_timer_interrupt+36. 1 : JLE_I : limm t2, 0x40 : IntAlu :
D=0x0000000000000040
1879968079707500: system.cpu4: T0 : 0x7fb5988c4b6a : comisd XMM2
gem5.opt: build/X86/arch/x86/insts/static_inst.cc:141: static void
X86ISA::X86StaticInst::printReg(std::ostream&, RegId, int): Assertion `size ==
1 || size == 2 || size == 4 || size == 8' failed.
Program aborted at tick 1879968079707500
A similar thing happen when I try to recover from another checkpoint:
4997159090526000: system.switch_cpus2: T0 : 0x7fb597f93c5b. 0 :
MOVUPS_XMM_M : ldfp %xmm0_low, DS:[rsi] : FloatMemRead :
D=0xc00b567540bda98c A=0x7fb55867c536
4997159090585000: system.switch_cpus4: T0 : 0x7fb597f70167 : mov
ecx
4997159090585000: system.switch_cpus4: T0 : 0x7fb597f70167. 0 :
MOV_R_R : mov eax, eax, ecx : IntAlu : D=0x0000000000000063
4997159090585000: system.switch_cpus4: T0 : 0x7fb597f70169 : movd
XMM0
gem5.opt: build/X86/arch/x86/insts/static_inst.cc:141: static void
X86ISA::X86StaticInst::printReg(std::ostream&, RegId, int): Assertion `size ==
1 || size == 2 || size == 4 || size == 8' failed.
Program aborted at tick 4997159090592000
Both problems seem to appear when running MMX code.
Are ISA extensions (MMX, SSE, AVX) not supported by the flag? Or by gem5 in
general?
Thank you very much,
Pedro.
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