[Bug 30712] Slow transitioning AMD ondemand CPU because of wrong sampling_rate

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https://bugzilla.kernel.org/show_bug.cgi?id=30712





--- Comment #6 from justincase@xxxxxxxxxxx  2011-03-28 05:28:09 ---
(In reply to comment #4)
(In reply to comment #5)

> sampling rate -> 100900

Oops, I did a mistake, this should have been 109000 and not 100900... I ran the
last part again. 

Using the *original* source code benchmark : 

#round load sleep performance powersave percentage
0 50000 50000 53543 73043 73.304
1 100000 100000 98023 126766 77.326
2 150000 150000 159160 210128 75.744
3 200000 200000 196206 249704 78.575
4 250000 250000 243273 306993 79.244
5 300000 300000 292181 361470 80.831
6 350000 350000 343698 394660 87.087
7 400000 400000 416815 484761 85.984
8 450000 450000 462757 545664 84.806
9 500000 500000 520991 598003 87.122
10 550000 550000 535377 596937 89.687
11 600000 600000 583483 648846 89.926
12 650000 650000 628524 698827 89.940
13 700000 700000 695536 757017 91.879
14 750000 750000 728124 804866 90.465
15 800000 800000 780291 857666 90.978
16 850000 850000 877801 967767 90.704
17 900000 900000 857772 949362 90.353
18 950000 950000 975308 1083946 89.978
19 1000000 1000000 1057874 1146442 92.275
20 1050000 1050000 1004248 1092633 91.911
21 1100000 1100000 1137662 1235654 92.070
22 1150000 1150000 1177812 1299840 90.612
23 1200000 1200000 1237668 1349017 91.746
24 1250000 1250000 1277581 1398822 91.333
25 1300000 1300000 1346782 1470433 91.591
26 1350000 1350000 1372685 1514791 90.619
27 1400000 1400000 1425458 1555385 91.647
28 1450000 1450000 1488907 1614644 92.213
29 1500000 1500000 1534220 1660851 92.376
30 1550000 1550000 1589945 1705595 93.219
31 1600000 1600000 1623821 1774659 91.500
32 1650000 1650000 1682260 1819625 92.451
33 1700000 1700000 1718704 1855909 92.607
34 1750000 1750000 1800496 1916997 93.923
35 1800000 1800000 1834767 1969702 93.149
36 1850000 1850000 1836771 1991248 92.242
37 1900000 1900000 1934180 2091324 92.486
38 1950000 1950000 1946207 2129832 91.378
39 2000000 2000000 2021666 2189178 92.348


Using the *modified* source code benchmark : 

sampling rate -> 109000

#round load sleep performance powersave percentage
0 50000 50000 51888 67155 77.267
1 100000 100000 100547 134729 74.629
2 150000 150000 150290 189240 79.417
3 200000 200000 202431 245879 82.330
4 250000 250000 250859 316895 79.161
5 300000 300000 303353 355627 85.301
6 350000 350000 342444 403122 84.948
7 400000 400000 398541 455542 87.487
8 450000 450000 445787 505192 88.241
9 500000 500000 494594 558546 88.550
10 550000 550000 550286 624562 88.107
11 600000 600000 599732 648617 92.463
12 650000 650000 658792 709540 92.848
13 700000 700000 692467 761048 90.989
14 750000 750000 734578 815476 90.080
15 800000 800000 795283 874258 90.967
16 850000 850000 853177 932069 91.536
17 900000 900000 908659 984574 92.290
18 950000 950000 944224 1020172 92.555
19 1000000 1000000 991434 1057693 93.736
20 1050000 1050000 1030782 1105324 93.256
21 1100000 1100000 1082488 1163559 93.033
22 1150000 1150000 1157796 1242472 93.185
23 1200000 1200000 1195277 1278660 93.479
24 1250000 1250000 1242131 1352067 91.869
25 1300000 1300000 1284598 1391095 92.344
26 1350000 1350000 1342151 1428773 93.937
27 1400000 1400000 1384506 1490919 92.863
28 1450000 1450000 1444801 1566643 92.223
29 1500000 1500000 1489048 1602071 92.945
30 1550000 1550000 1547435 1661750 93.121
31 1600000 1600000 1600977 1699581 94.198
32 1650000 1650000 1646659 1744241 94.405
33 1700000 1700000 1706900 1808868 94.363
34 1750000 1750000 1744235 1864876 93.531
35 1800000 1800000 1782070 1899208 93.832
36 1850000 1850000 1833140 1956952 93.673
37 1900000 1900000 1913469 2021041 94.677
38 1950000 1950000 1938900 2078972 93.262
39 2000000 2000000 1988934 2111682 94.187

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