A comparison of MPIR-1.2.1 on intel nehalem built as a core2 on Linux and
Windows.
This is in cycles and first col is Linux and second col is windows , ignore
the # , they are wrong
./speed -c -s 1-40 mpn_add_n colfile=1,win64_bat/time_add
overhead 5.71 cycles, precision 1000000 units of 3.75e-10 secs, CPU freq
2664.77 MHz
mpn_add_n colfile=1,win64_bat/time_add
1 #12.38 12.38
2 #11.43 12.38
3 #13.09 13.50
4 #18.41 18.10
5 #23.81 23.81
6 #24.00 24.45
7 #27.76 27.25
8 #26.19 26.19
9 #28.42 30.00
10 #29.62 31.43
11 #32.31 32.86
12 #34.50 34.29
13 #37.39 37.14
14 #40.00 38.73
15 #41.91 42.86
16 #40.48 42.22
17 #44.77 45.72
18 #45.85 46.77
19 #48.39 48.19
20 #49.53 49.76
21 #53.66 53.53
22 #53.81 54.65
23 #55.24 56.33
24 #56.91 57.31
25 #60.48 60.96
26 #60.84 62.65
27 #62.60 63.43
28 #65.72 64.76
29 #68.58 67.46
30 #67.39 69.80
31 #72.67 69.53
32 #72.39 72.96
33 #75.72 77.15
34 #76.91 78.81
35 #76.20 78.26
36 #79.06 80.72
37 #83.34 83.43
38 #84.77 84.90
39 #85.62 85.34
40 #87.49 88.58
./speed -c -s 1-40 mpn_addmul_1.333 colfile=1,win64_bat/time_addmul1
overhead 5.71 cycles, precision 1000000 units of 3.75e-10 secs, CPU freq
2664.77 MHz
mpn_addmul_1.333 colfile=1,win64_bat/time_addmul1
1 #11.43 37.14
2 #17.15 28.33
3 #23.15 31.43
4 #29.05 39.53
5 #34.62 46.11
6 #40.52 49.23
7 #45.72 54.29
8 #51.75 57.60
9 #57.15 65.12
10 #63.09 67.21
11 #69.00 72.63
12 #74.97 75.98
13 #80.01 82.07
14 #76.77 85.72
15 #80.32 90.48
16 #84.24 94.29
17 #91.04 101.52
18 #95.12 104.77
19 #98.95 110.62
20 #103.40 114.86
21 #108.45 118.74
22 #112.95 124.58
23 #116.22 129.26
24 #120.21 133.34
25 #127.04 138.46
26 #131.78 142.97
27 #135.26 147.81
28 #140.71 152.63
29 #146.01 156.67
30 #149.29 161.39
31 #151.82 167.20
32 #157.58 171.12
33 #163.28 177.38
34 #168.20 181.00
35 #173.00 185.66
36 #176.42 191.12
37 #183.57 195.69
38 #185.68 200.07
39 #190.67 204.46
40 #191.45 209.37
./speed -c -s 1-40 mpn_addmul_2 colfile=1,win64_bat/time_addmul2
overhead 5.71 cycles, precision 1000000 units of 3.75e-10 secs, CPU freq
2664.77 MHz
mpn_addmul_2 colfile=1,win64_bat/time_addmul2
1 n/a #0.00
2 #25.10 31.82
3 #33.71 39.53
4 #41.34 49.40
5 #51.20 57.57
6 #57.15 65.53
7 #65.72 73.81
8 #74.00 81.95
9 #83.00 90.01
10 #91.31 97.15
11 #99.70 104.77
12 #108.22 115.16
13 #116.44 122.20
14 #121.93 130.01
15 #131.60 139.69
16 #139.31 147.51
17 #149.05 155.11
18 #156.21 164.43
19 #165.05 171.73
20 #172.72 180.22
21 #181.55 188.48
22 #189.37 199.52
23 #199.07 203.65
24 #206.69 212.16
25 #212.50 221.57
26 #222.27 229.50
27 #231.47 237.38
28 #238.32 246.91
29 #247.81 254.30
30 #255.24 261.65
31 #261.85 272.16
32 #271.55 279.69
33 #280.37 285.91
34 #288.60 295.80
35 #297.46 302.80
36 #304.37 311.85
37 #312.94 320.60
38 #320.62 327.36
39 #328.93 337.28
40 #338.25 343.47
./speed -c -s 1-40 mpn_mul_basecase colfile=1,win64_bat/time_mulbase
overhead 5.71 cycles, precision 1000000 units of 3.75e-10 secs, CPU freq
2664.77 MHz
mpn_mul_basecase colfile=1,win64_bat/time_mulbase
1 #9.52 8.57
2 #28.79 48.57
3 #50.85 72.54
4 #82.68 100.00
5 #114.62 135.24
6 #155.92 178.51
7 #210.50 232.87
8 #267.02 289.22
9 #341.31 438.35
10 #416.70 431.50
11 #504.12 523.84
12 #592.83 612.98
13 #698.18 727.01
14 #803.90 828.87
15 #927.52 951.48
16 #1044.89 1069.58
17 #1197.26 1222.67
18 #1328.40 1350.14
19 #1480.56 1504.67
20 #1633.17 1652.56
21 #1818.39 1838.12
22 #1988.85 2004.68
23 #2185.06 2194.37
24 #2355.79 2372.55
25 #2589.94 2599.87
26 #2769.85 2792.36
27 #2993.14 3007.09
28 #3205.00 3403.94
29 #3445.63 3475.97
30 #3678.54 3708.50
31 #3929.52 3976.62
32 #4184.47 4208.07
33 #4478.52 4500.55
34 #4726.07 4756.50
35 #5034.90 5048.47
36 #5295.16 5317.34
37 #5626.73 5646.50
38 #5902.33 5917.02
39 #6225.96 6252.33
40 #6541.47 6563.06
./speed -c -s 1-40 mpn_sqr_basecase colfile=1,win64_bat/time_sqrbase
overhead 5.71 cycles, precision 1000000 units of 3.75e-10 secs, CPU freq
2664.77 MHz
mpn_sqr_basecase colfile=1,win64_bat/time_sqrbase
1 #7.62 7.62
2 #17.14 17.14
3 #43.81 47.53
4 #74.29 85.72
5 #106.19 114.45
6 #133.83 145.72
7 #171.69 183.59
8 #213.36 223.73
9 #259.08 270.49
10 #310.52 322.39
11 #367.15 376.37
12 #426.64 439.26
13 #494.58 508.89
14 #562.71 572.72
15 #641.03 649.69
16 #713.74 728.12
17 #803.52 812.86
18 #890.97 899.63
19 #982.98 995.49
20 #1082.37 1092.61
21 #1183.96 1204.66
22 #1291.96 1300.94
23 #1405.15 1405.02
24 #1521.08 1531.02
25 #1651.29 1651.48
26 #1769.72 1778.50
27 #1895.14 1911.57
28 #2030.37 2525.85
29 #2195.53 2188.53
30 #2317.56 2333.57
31 #2470.87 2481.63
32 #2627.25 2636.25
33 #2791.54 2805.56
34 #2936.54 2958.32
35 #3118.37 3126.90
36 #3280.58 3298.26
37 #3454.08 3479.90
38 #3648.92 3655.95
39 #3844.89 3844.73
40 #4031.90 4078.56
The very small differences between mpn_add_n on Linux and Windows show that
the other differences are not just down to how we call the cpu timer or
function call overheads, therefore they are real timing differences and not
some artifact. So we hopefully can improve this. I would of preferred AMD
timings as I am more familiar with that chip.
Jason
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