Hi all:
When I use se mode to execute an ELF under O3 type with Exec debug
flags, the sim_insts in stats.txt is different with the lines of Exec debug
output file.
Sim_ints is 94189557, but Exec debug output file has 472187507 lines. I
have test the same ELF on my aarch64 server with “perf stat -e r11 -e r8:k -e
r8:u ./redis_0327”, the r8:u is userspace instrution counts, the result is:
1,514,293,116 r11
820,116,727 r8:k
429,128,196 r8:u
Is the count of sim_insts was wrong?It seems that the sim_insts is about a
fifth less than the actual count of instructions.
My gem5 versiont is 20.0.0.3, my command is
“./build/ARM/gem5.opt --debug-flags=Exec --debug-file=./new_o3_debug_out.txt
configs/example/se.py --cpu-type=DerivO3CPU --cpu-clock=2.6GHz
--sys-clock=2.6GHz --caches --l2cache --mem-size=8GB
--nvmain-config=../../nvmain_public/Config/template_DRAM_2933.config -c
./redis_0327”
Stats.txt:
final_tick 144144768845 # Number of ticks from beginning of simulation
(restored from checkpoints and never reset)
host_inst_rate 18845 # Simulator instruction rate (inst/s)
host_mem_usage 8562280 # Number of bytes of host memory used
host_op_rate 24546 # Simulator op (including micro ops) rate (op/s)
host_seconds 4998.02 # Real time elapsed on the host
host_tick_rate 28840391 # Simulator tick rate (ticks/s)
sim_freq 1000000000000 # Frequency of simulated ticks
sim_insts 94189557 # Number of instructions simulated
sim_ops 122680518 # Number of ops (including micro ops) simulated
sim_seconds 0.144145 # Number of seconds simulated
sim_ticks 144144768845 # Number of ticks simulated
Exec debug output file:
cat m5out/new_o3_debug_out.txt |wc -l
472187507
________________________________
李翼超（Charlie）
华为技术有限公司 Huawei Technologies Co., Ltd.
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部门：计算系统与组件开发部 [云与计算BG]
手 机：15858232899
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