Showing the changes to tools/perf/scripts/python (1 of 1 file). Show all
Unified · Split
| @@ -40,10 +40,24 @@ def get_kallsyms_table(): · 39 unmodified lines | |||
| 40 | 40 | ||
| 41 | def get_sym(sloc): | 41 | def get_sym(sloc): |
| 42 | loc = int(sloc) | 42 | loc = int(sloc) |
| 43 | for symloc, name in kallsyms[::-1]: | 43 | |
| 44 | if loc >= symloc: | 44 | # Invariant: kallsyms[i][0] <= loc for all 0 <= i <= start |
| 45 | return (name, loc - symloc) | 45 | # kallsyms[i][0] > loc for all end <= i < len(kallsyms) |
| 46 | return (None, 0) | 46 | start, end = -1, len(kallsyms) |
| 47 | while end != start + 1: | ||
| 48 | pivot = (start + end) // 2 | ||
| 49 | if loc < kallsyms[pivot][0]: | ||
| 50 | end = pivot | ||
| 51 | else: | ||
| 52 | start = pivot | ||
| 53 | |||
| 54 | # Now (start == -1 or kallsyms[start][0] <= loc) | ||
| 55 | # and (start == len(kallsyms) - 1 or loc < kallsyms[start + 1][0]) | ||
| 56 | if start >= 0: | ||
| 57 | symloc, name = kallsyms[start] | ||
| 58 | return (name, loc - symloc) | ||
| 59 | else: | ||
| 60 | return (None, 0) | ||
| 47 | 61 | ||
| 48 | def print_drop_table(): | 62 | def print_drop_table(): |
| 49 | print "%25s %25s %25s" % ("LOCATION", "OFFSET", "COUNT") | 63 | print "%25s %25s %25s" % ("LOCATION", "OFFSET", "COUNT") |