diff options
Diffstat (limited to 'gprof/gprof.texi')
| -rw-r--r-- | gprof/gprof.texi | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/gprof/gprof.texi b/gprof/gprof.texi index f8be278..969d60e 100644 --- a/gprof/gprof.texi +++ b/gprof/gprof.texi @@ -2082,11 +2082,12 @@ New-style histogram records are read by @code{hist.c:@-hist_read_rec}. For the first histogram record, allocate a memory array to hold all the bins, and read them in. When multiple profile data files (or files with multiple histogram -records) are read, the starting address, ending address, number -of bins and sampling rate must match between the various histograms, -or a fatal error will result. -If everything matches, just sum the additional histograms into -the existing in-memory array. +records) are read, the memory ranges of each pair of histogram records +must be either equal, or non-overlapping. For each pair of histogram +records, the resolution (memory region size divided by the number of +bins) must be the same. The time unit must be the same for all +histogram records. If the above containts are met, all histograms +for the same memory range are merged. As each call graph record is read (@code{call_graph.c:@-cg_read_rec}), the parent and child addresses |