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| author | Ingo Molnar <mingo@elte.hu> | 2007-08-09 09:16:51 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-08-09 09:16:51 (GMT) |
| commit | 254753dc321ea2b753ca9bc58ac329557a20efac (patch) | |
| tree | 57abb3eeaad1f9c9cc258975bef92567f5a01253 /kernel/time.c | |
| parent | 6e82a3befe91423e501c2124312bd805be0048eb (diff) | |
| download | linux-fsl-qoriq-254753dc321ea2b753ca9bc58ac329557a20efac.tar.xz | |
sched: make the multiplication table more accurate
do small deltas in the weight and multiplication constant table so
that the worst-case numeric error is better than 1:100000000. (8 digits)
the current error table is:
nice mult * inv_mult error
------------------------------------------
-20: 88761 * 48388 -0.0000000065
-19: 71755 * 59856 -0.0000000037
-18: 56483 * 76040 0.0000000056
-17: 46273 * 92818 0.0000000042
-16: 36291 * 118348 -0.0000000065
-15: 29154 * 147320 -0.0000000037
-14: 23254 * 184698 -0.0000000009
-13: 18705 * 229616 -0.0000000037
-12: 14949 * 287308 -0.0000000009
-11: 11916 * 360437 -0.0000000009
-10: 9548 * 449829 -0.0000000009
-9: 7620 * 563644 -0.0000000037
-8: 6100 * 704093 0.0000000009
-7: 4904 * 875809 0.0000000093
-6: 3906 * 1099582 -0.0000000009
-5: 3121 * 1376151 -0.0000000058
-4: 2501 * 1717300 0.0000000009
-3: 1991 * 2157191 -0.0000000035
-2: 1586 * 2708050 0.0000000009
-1: 1277 * 3363326 0.0000000014
0: 1024 * 4194304 0.0000000000
1: 820 * 5237765 0.0000000009
2: 655 * 6557202 0.0000000033
3: 526 * 8165337 -0.0000000079
4: 423 * 10153587 0.0000000012
5: 335 * 12820798 0.0000000079
6: 272 * 15790321 0.0000000037
7: 215 * 19976592 -0.0000000037
8: 172 * 24970740 -0.0000000037
9: 137 * 31350126 -0.0000000079
10: 110 * 39045157 -0.0000000061
11: 87 * 49367440 -0.0000000037
12: 70 * 61356676 0.0000000056
13: 56 * 76695844 -0.0000000075
14: 45 * 95443717 -0.0000000072
15: 36 * 119304647 -0.0000000009
16: 29 * 148102320 -0.0000000037
17: 23 * 186737708 -0.0000000028
18: 18 * 238609294 -0.0000000009
19: 15 * 286331153 -0.0000000002
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/time.c')
0 files changed, 0 insertions, 0 deletions