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| author | Martin Liska <mliska@suse.cz> | 2020-01-22 12:08:11 +0100 |
|---|---|---|
| committer | Martin Liska <mliska@suse.cz> | 2020-01-22 12:08:11 +0100 |
| commit | 5f32f9cf13f99f6295591927950aaf98aa8dba91 (patch) | |
| tree | 59ab45c6e2d886178d1ca9e17317ffdc1c043c31 /libgcc/libgcov-profiler.c | |
| parent | f96af171bee93486896407ccad0e1e4dc200bc0c (diff) | |
| download | gcc-5f32f9cf13f99f6295591927950aaf98aa8dba91.zip gcc-5f32f9cf13f99f6295591927950aaf98aa8dba91.tar.gz gcc-5f32f9cf13f99f6295591927950aaf98aa8dba91.tar.bz2 | |
Smart relaxation of TOP N counter.
PR tree-optimization/92924
* profile.c (compute_value_histograms): Divide
all counter values.
PR tree-optimization/92924
* libgcov-driver.c (prune_topn_counter): New.
(prune_counters): Likewise.
(dump_one_gcov): Prune a run-time counter.
* libgcov-profiler.c (__gcov_topn_values_profiler_body):
For a known value, add GCOV_TOPN_VALUES to value.
Otherwise, decrement all counters by one.
Diffstat (limited to 'libgcc/libgcov-profiler.c')
| -rw-r--r-- | libgcc/libgcov-profiler.c | 30 |
1 files changed, 14 insertions, 16 deletions
diff --git a/libgcc/libgcov-profiler.c b/libgcc/libgcov-profiler.c index 9417904..f45ef49 100644 --- a/libgcc/libgcov-profiler.c +++ b/libgcc/libgcov-profiler.c @@ -119,37 +119,35 @@ __gcov_topn_values_profiler_body (gcov_type *counters, gcov_type value, ++counters; - /* We have GCOV_TOPN_VALUES as we can keep multiple values - next to each other. */ - unsigned sindex = 0; - for (unsigned i = 0; i < GCOV_TOPN_VALUES; i++) { if (value == counters[2 * i]) { if (use_atomic) - __atomic_fetch_add (&counters[2 * i + 1], 1, __ATOMIC_RELAXED); + __atomic_fetch_add (&counters[2 * i + 1], GCOV_TOPN_VALUES, + __ATOMIC_RELAXED); else - counters[2 * i + 1]++; + counters[2 * i + 1] += GCOV_TOPN_VALUES; return; } - else if (counters[2 * i + 1] == 0) + else if (counters[2 * i + 1] <= 0) { /* We found an empty slot. */ counters[2 * i] = value; - counters[2 * i + 1] = 1; + counters[2 * i + 1] = GCOV_TOPN_VALUES; return; } - - if (counters[2 * i + 1] < counters[2 * sindex + 1]) - sindex = i; } - /* We haven't found an empty slot, then decrement the smallest. */ - if (use_atomic) - __atomic_fetch_sub (&counters[2 * sindex + 1], 1, __ATOMIC_RELAXED); - else - counters[2 * sindex + 1]--; + /* We haven't found an empty slot, then decrement all + counter values by one. */ + for (unsigned i = 0; i < GCOV_TOPN_VALUES; i++) + { + if (use_atomic) + __atomic_fetch_sub (&counters[2 * i + 1], 1, __ATOMIC_RELAXED); + else + counters[2 * i + 1]--; + } } #ifdef L_gcov_topn_values_profiler |