Hi All:
Are there any experts who can help me to explain the features of the
scheduleInstStop() function?
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李翼超（Charlie）
华为技术有限公司 Huawei Technologies Co., Ltd.
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发件人: Liyichao
发送时间: 2020年8月7日 12:12
收件人: 'gem5-users@gem5.org' <gem5-users@gem5.org>
主题: Supplementing experiment Data///答复: How to make scheduleInstStop() function
to stop simulate at an accurate expected instructions counts for one core
KVM/ATOMIC/O3 CPU simulation?
Hi All:
I use the scheduleInstStop() function to let the m5.simulate() stop at a point
instrutions as my ROI start, for example: 100000000(100M) instrutions, but when
the simulate stop, I print the instructions from last start simulation to the
end, the count always exceed my specified instrutions(100M), like 100423403,
about 0.4% exceeded. If I set to 137579444 in O3 cpu, when simulation stop,
totalInsts() print 121264766,about 12% instruction number error.
The more detail the CPU is or the less expected instruction we set to
scheduleInstStop() , the more error rate the result is.
Can the scheduleInstStop() function to stop simulate at an accurate instrutions
count?
Below is my experiment data:
SP means each ROI segment number
WT means weight each SP
KVM FF INSTS means expected fastforward instrutions set to shceduleInstsStop
in KVM CPU and KVM FF INSTS REAL means actural instructions when simulation
stopped.
Thes same as DETAIL WARMUP INSTS and DETAIL WARMUP INSTS REAL, ROI START REAL
DETAIL SIM INSTS REAL means actural instructions when simulation stopped.
SP
ROI START INSTS
ROI INSTS
WT
GEM5 CPU time(s)
KVM FF INSTS REAL
KVM FF INSTS
KVM FF ERROR
DETAIL WARMUP INSTS REAL
DETAIL WARMUP INSTS
DETAIL WARMUP ERROR RATE
ROI START REAL
ROI START ERROR
ROI START ERROR RATE
DETAIL SIM INSTS REAL
ROI ERROR
ROI ERROR RATE
253
10178192697
7961215
0.0831
235.37
10168198363
10168192697
0.000056%
11769096
10000000
17.69%
10179967459
1774762
0.01744%
9765795
1804580
22.67%
489
14993215251
28956263
0.0807
480.69
14985233613
14983215251
0.013471%
12670891
10000000
26.71%
14997904504
4689253
0.03128%
31630388
2674125
9.24%
745
20961513684
7952028
0.0831
366.16
20951519275
20951513684
0.000027%
10930605
10000000
9.31%
20962449880
936196
0.00447%
9196796
1244768
15.65%
747
20985389544
7913399
0.0831
368.9
20976588014
20975389544
0.005714%
13508368
10000000
35.08%
20990096382
4706838
0.02243%
8729639
816240
10.31%
1535
36747557633
71903019
0.0489
852.12
36737563780
36737557633
0.000017%
13915280
10000000
39.15%
36751479060
3921427
0.01067%
76114831
4211812
5.86%
1576
39801482033
72581100
0.0489
986.37
39791620332
39791482033
0.000348%
13898089
10000000
38.98%
39805518421
4036388
0.01014%
76712281
4131181
5.69%
1630
41397216547
7969257
0.0831
576.6
41387222182
41387216547
0.000014%
14108619
10000000
41.09%
41401330801
4114254
0.00994%
12213236
4243979
53.25%
1678
41875758899
7945777
0.0831
578.1
41871459914
41865758899
0.013617%
14214926
10000000
42.15%
41885674840
9915941
0.02368%
12108036
4162259
52.38%
1884
46344067975
28927369
0.0807
845.82
46334073500
46334067975
0.000012%
11344254
10000000
13.44%
46345417754
1349779
0.00291%
31850077
2922708
10.10%
1919
47342402174
28905117
0.0807
805.16
47332436420
47332402174
0.000072%
12802266
10000000
28.02%
47345238686
2836512
0.00599%
31773934
2868817
9.92%
1926
47542229035
28886691
0.0807
787.53
47534320414
47532229035
0.004400%
12709174
10000000
27.09%
47547029588
4800553
0.01010%
31731786
2845095
9.85%
1940
47914392807
28885810
0.0807
761.57
47904398647
47904392807
0.000012%
12542440
10000000
25.42%
47916941087
2548280
0.00532%
31799566
2913756
10.09%
2756
62457880622
7895848
0.0831
504.08
62447886490
62447880622
0.000009%
13888058
10000000
38.88%
62461774548
3893926
0.00623%
11734236
3838388
48.61%
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