hello all,
I emulate the same program in x86-se and x86-fs modes ,I have two puzzles
when I get the stats.txt
puzzle 1: the sim_seconds is huge different
puzzle 2：the TLB accesses is huge different
here is my program
#include <stdio.h>
void main(){
int a [10240];
int i=0;
int sum;
for(i=0;i<=10239;i++)
{
a[i]=i;
}
printf("%d\n",a[i-1]);
}
The following is the simulation results
se model ：
commend line：build/X86/gem5.opt configs/example/se.py
--cpu-type=TimingSimpleCPU --caches - c mountfile/arrraywritenew
stats.txt:
---------- Begin Simulation Statistics ----------
sim_seconds 0.000515 #
Number of seconds simulated
sim_ticks 515234000 #
Number of ticks simulated
system.cpu.dtb.rdAccesses 63141 #
TLB accesses on read requests
system.cpu.dtb.wrAccesses 32281 #
TLB accesses on write requests
system.cpu.dtb.rdMisses 72 #
TLB misses on read requests
system.cpu.dtb.wrMisses 24 #
TLB misses on write requests
system.cpu.itb.rdAccesses 0 #
TLB accesses on read requests
system.cpu.itb.wrAccesses 225198 #
TLB accesses on write requests
system.cpu.itb.rdMisses 0 #
TLB misses on read requests
system.cpu.itb.wrMisses 74 #
TLB misses on write requests
FS model：
common line：build/X86/gem5.opt configs/example/se.py --cpu-type=TimingSimpleCPU
--caches --script=configs/boot/arraywrite.rcS
stats.txt
--------- Begin Simulation Statistics ----------
sim_seconds 5.308574 #
Number of seconds simulated
sim_ticks 5308574319000 #
Number of ticks simulated
final_tick 5308574319000
system.cpu.dtb.rdAccesses 16111843 #
TLB accesses on read requests
system.cpu.dtb.wrAccesses 10662308 #
TLB accesses on write requests
system.cpu.dtb.rdMisses 7951 #
TLB misses on read requests
system.cpu.dtb.wrMisses 1181
system.cpu.itb.rdAccesses 0 #
TLB accesses on read requests
system.cpu.itb.wrAccesses 163647017 #
TLB accesses on write requests
system.cpu.itb.rdMisses 0 #
TLB misses on read requests
system.cpu.itb.wrMisses 3946
Thanks in advance
regards
lily_______________________________________________
gem5-users mailing list
[email protected]
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
