From abd16fb1120cfebd99f4efc9eba9b326fdf05715 Mon Sep 17 00:00:00 2001 From: Teresa Johnson <tejohnson@gcc.gnu.org> Date: Tue, 4 Sep 2012 21:20:30 +0000 Subject: [PATCH] Adding change log entries for r190952: Enhances the gcov program summary by adding a histogram of arc counter entries. This is used to compute working set information in the compiler for use by optimizations that need information on hot vs cold counter values or the rough working set size in terms of the number of counters. Each working set data point is the minimum counter value and number of counters required to reach a given percentage of the cumulative counter sum across the profiled execution (sum_all in the program summary). 2012-09-04 Teresa Johnson <tejohnson@google.com> * libgcc/libgcov.c (struct gcov_summary_buffer): New structure. (gcov_histogram_insert): New function. (gcov_compute_histogram): Ditto. (gcov_exit): Invoke gcov_compute_histogram, and perform merging of histograms during summary merging. * gcc/gcov-io.c (gcov_write_summary): Write out non-zero histogram entries to function summary along with an occupancy bit vector. (gcov_read_summary): Read in the histogram entries. (gcov_histo_index): New function. (void gcov_histogram_merge): Ditto. * gcc/gcov-io.h (gcov_type_unsigned): New type. (struct gcov_bucket_type): Ditto. (struct gcov_ctr_summary): Include histogram. (GCOV_TAG_SUMMARY_LENGTH): Update to include histogram entries. (GCOV_HISTOGRAM_SIZE): New macro. (GCOV_HISTOGRAM_BITVECTOR_SIZE): Ditto. * gcc/profile.c (NUM_GCOV_WORKING_SETS): Ditto. (gcov_working_sets): New global variable. (compute_working_sets): New function. (find_working_set): Ditto. (get_exec_counts): Invoke compute_working_sets. * gcc/coverage.c (read_counts_file): Merge histograms, and fix bug with accessing summary info for non-summable counters. * gcc/basic-block.h (gcov_type_unsigned): New type. (struct gcov_working_set_info): Ditto. (find_working_set): Declare. * gcc/gcov-dump.c (tag_summary): Dump out histogram. From-SVN: r190953 --- gcc/ChangeLog | 25 +++++++++++++++++++++++++ libgcc/ChangeLog | 8 ++++++++ 2 files changed, 33 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d0c7a73a4f4c..834fa34c6029 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,28 @@ +2012-09-04 Teresa Johnson <tejohnson@google.com> + + * gcov-io.c (gcov_write_summary): Write out non-zero histogram + entries to function summary along with an occupancy bit vector. + (gcov_read_summary): Read in the histogram entries. + (gcov_histo_index): New function. + (void gcov_histogram_merge): Ditto. + * gcov-io.h (gcov_type_unsigned): New type. + (struct gcov_bucket_type): Ditto. + (struct gcov_ctr_summary): Include histogram. + (GCOV_TAG_SUMMARY_LENGTH): Update to include histogram entries. + (GCOV_HISTOGRAM_SIZE): New macro. + (GCOV_HISTOGRAM_BITVECTOR_SIZE): Ditto. + * profile.c (NUM_GCOV_WORKING_SETS): Ditto. + (gcov_working_sets): New global variable. + (compute_working_sets): New function. + (find_working_set): Ditto. + (get_exec_counts): Invoke compute_working_sets. + * coverage.c (read_counts_file): Merge histograms, and + fix bug with accessing summary info for non-summable counters. + * basic-block.h (gcov_type_unsigned): New type. + (struct gcov_working_set_info): Ditto. + (find_working_set): Declare. + * gcov-dump.c (tag_summary): Dump out histogram. + 2012-09-04 Diego Novillo <dnovillo@google.com> PR bootstrap/54484 diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index 463b87289c6e..ed5b2af2e22a 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,11 @@ +2012-09-04 Teresa Johnson <tejohnson@google.com> + + * libgcov.c (struct gcov_summary_buffer): New structure. + (gcov_histogram_insert): New function. + (gcov_compute_histogram): Ditto. + (gcov_exit): Invoke gcov_compute_histogram, and perform merging of + histograms during summary merging. + 2012-09-01 Mark Kettenis <kettenis@openbsd.org> * config.host (x86_64-*-openbsd*): New target. -- GitLab