From 64a1a422dba4b0c09ad38310e32a223f2e16ed9d Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Mon, 17 Oct 2011 09:59:52 +0000 Subject: [PATCH] Add line map statistics to -fmem-report output This patch adds statistics about line maps' memory consumption and macro expansion to the output of -fmem-report. It has been useful in trying to reduce the memory consumption of the macro maps support. Co-Authored-By: Dodji Seketeli From-SVN: r180085 --- gcc/ChangeLog | 11 +++++ gcc/input.c | 96 +++++++++++++++++++++++++++++++++++++++ gcc/input.h | 2 + gcc/toplev.c | 1 + libcpp/ChangeLog | 12 +++++ libcpp/include/line-map.h | 21 +++++++++ libcpp/line-map.c | 63 +++++++++++++++++++++++++ libcpp/macro.c | 29 ++++++++++-- 8 files changed, 231 insertions(+), 4 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9021c977b37..81caf547177 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,14 @@ +2011-10-15 Tom Tromey + Dodji Seketeli + + * input.c (ONE_K, ONE_M, SCALE, STAT_LABEL, FORMAT_AMOUNT): New + macros. + (num_expanded_macros_counter, num_macro_tokens_counter): Declare + new counters. + (dump_line_table_statistics): Define new function. + * input.h (dump_line_table_statistics): Declare new function. + * toplev.c (dump_memory_report): Call dump_line_table_statistics. + 2011-10-15 Tom Tromey Dodji Seketeli diff --git a/gcc/input.c b/gcc/input.c index 89af274d2da..41842b7530f 100644 --- a/gcc/input.c +++ b/gcc/input.c @@ -46,3 +46,99 @@ expand_location (source_location loc) LRK_SPELLING_LOCATION); return xloc; } + +#define ONE_K 1024 +#define ONE_M (ONE_K * ONE_K) + +/* Display a number as an integer multiple of either: + - 1024, if said integer is >= to 10 K (in base 2) + - 1024 * 1024, if said integer is >= 10 M in (base 2) + */ +#define SCALE(x) ((unsigned long) ((x) < 10 * ONE_K \ + ? (x) \ + : ((x) < 10 * ONE_M \ + ? (x) / ONE_K \ + : (x) / ONE_M))) + +/* For a given integer, display either: + - the character 'k', if the number is higher than 10 K (in base 2) + but strictly lower than 10 M (in base 2) + - the character 'M' if the number is higher than 10 M (in base2) + - the charcter ' ' if the number is strictly lower than 10 K */ +#define STAT_LABEL(x) ((x) < 10 * ONE_K ? ' ' : ((x) < 10 * ONE_M ? 'k' : 'M')) + +/* Display an integer amount as multiple of 1K or 1M (in base 2). + Display the correct unit (either k, M, or ' ') after the amout, as + well. */ +#define FORMAT_AMOUNT(size) SCALE (size), STAT_LABEL (size) + +/* Dump statistics to stderr about the memory usage of the line_table + set of line maps. This also displays some statistics about macro + expansion. */ + +void +dump_line_table_statistics (void) +{ + struct linemap_stats s; + size_t total_used_map_size, + macro_maps_size, + total_allocated_map_size; + + memset (&s, 0, sizeof (s)); + + linemap_get_statistics (line_table, &s); + + macro_maps_size = s.macro_maps_used_size + + s.macro_maps_locations_size; + + total_allocated_map_size = s.ordinary_maps_allocated_size + + s.macro_maps_allocated_size + + s.macro_maps_locations_size; + + total_used_map_size = s.ordinary_maps_used_size + + s.macro_maps_used_size + + s.macro_maps_locations_size; + + fprintf (stderr, "Number of expanded macros: %5lu\n", + s.num_expanded_macros); + if (s.num_expanded_macros != 0) + fprintf (stderr, "Average number of tokens per macro expansion: %5lu\n", + s.num_macro_tokens / s.num_expanded_macros); + fprintf (stderr, + "\nLine Table allocations during the " + "compilation process\n"); + fprintf (stderr, "Number of ordinary maps used: %5lu%c\n", + SCALE (s.num_ordinary_maps_used), + STAT_LABEL (s.num_ordinary_maps_used)); + fprintf (stderr, "Ordinary map used size: %5lu%c\n", + SCALE (s.ordinary_maps_used_size), + STAT_LABEL (s.ordinary_maps_used_size)); + fprintf (stderr, "Number of ordinary maps allocated: %5lu%c\n", + SCALE (s.num_ordinary_maps_allocated), + STAT_LABEL (s.num_ordinary_maps_allocated)); + fprintf (stderr, "Ordinary maps allocated size: %5lu%c\n", + SCALE (s.ordinary_maps_allocated_size), + STAT_LABEL (s.ordinary_maps_allocated_size)); + fprintf (stderr, "Number of macro maps used: %5lu%c\n", + SCALE (s.num_macro_maps_used), + STAT_LABEL (s.num_macro_maps_used)); + fprintf (stderr, "Macro maps used size: %5lu%c\n", + SCALE (s.macro_maps_used_size), + STAT_LABEL (s.macro_maps_used_size)); + fprintf (stderr, "Macro maps locations size: %5lu%c\n", + SCALE (s.macro_maps_locations_size), + STAT_LABEL (s.macro_maps_locations_size)); + fprintf (stderr, "Macro maps size: %5lu%c\n", + SCALE (macro_maps_size), + STAT_LABEL (macro_maps_size)); + fprintf (stderr, "Duplicated maps locations size: %5lu%c\n", + SCALE (s.duplicated_macro_maps_locations_size), + STAT_LABEL (s.duplicated_macro_maps_locations_size)); + fprintf (stderr, "Total allocated maps size: %5lu%c\n", + SCALE (total_allocated_map_size), + STAT_LABEL (total_allocated_map_size)); + fprintf (stderr, "Total used maps size: %5lu%c\n", + SCALE (total_used_map_size), + STAT_LABEL (total_used_map_size)); + fprintf (stderr, "\n"); +} diff --git a/gcc/input.h b/gcc/input.h index 9fc55f3ac7f..f2f351311fc 100644 --- a/gcc/input.h +++ b/gcc/input.h @@ -55,4 +55,6 @@ extern location_t input_location; ((linemap_location_in_system_header_p (line_table, LOC))) #define in_system_header (in_system_header_at (input_location)) +void dump_line_table_statistics (void); + #endif diff --git a/gcc/toplev.c b/gcc/toplev.c index c43869c3b31..f508196b3eb 100644 --- a/gcc/toplev.c +++ b/gcc/toplev.c @@ -1827,6 +1827,7 @@ target_reinit (void) void dump_memory_report (bool final) { + dump_line_table_statistics (); ggc_print_statistics (); stringpool_statistics (); dump_tree_statistics (); diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog index bd86466f256..fad0da65853 100644 --- a/libcpp/ChangeLog +++ b/libcpp/ChangeLog @@ -1,3 +1,15 @@ +2011-10-15 Tom Tromey + Dodji Seketeli + + * line-map.h (struct linemap_stats): Declare new struct. + (linemap_get_statistics): Declare ... + * line-map.c (linemap_get_statistics): ... new function. + * macro.c (num_expanded_macros_counter, num_macro_tokens_counter): + Declare new counters. + (enter_macro_context, replace_args): Update + num_macro_tokens_counter. + (cpp_get_token_1): Update num_expanded_macros_counter. + 2011-10-15 Tom Tromey Dodji Seketeli diff --git a/libcpp/include/line-map.h b/libcpp/include/line-map.h index 04a523c2bfc..572e330a1bd 100644 --- a/libcpp/include/line-map.h +++ b/libcpp/include/line-map.h @@ -675,6 +675,27 @@ expanded_location linemap_expand_location_full (struct line_maps *, source_location loc, enum location_resolution_kind lrk); +/* Statistics about maps allocation and usage as returned by + linemap_get_statistics. */ +struct linemap_stats +{ + size_t num_ordinary_maps_allocated; + size_t num_ordinary_maps_used; + size_t ordinary_maps_allocated_size; + size_t ordinary_maps_used_size; + size_t num_expanded_macros; + size_t num_macro_tokens; + size_t num_macro_maps_used; + size_t macro_maps_allocated_size; + size_t macro_maps_used_size; + size_t macro_maps_locations_size; + size_t duplicated_macro_maps_locations_size; +}; + +/* Compute and return statistics about the memory consumption of some + parts of the line table SET. */ +void linemap_get_statistics (struct line_maps *, struct linemap_stats *); + /* Dump debugging information about source location LOC into the file stream STREAM. SET is the line map set LOC comes from. */ void linemap_dump_location (struct line_maps *, source_location, FILE *); diff --git a/libcpp/line-map.c b/libcpp/line-map.c index 3dbaeaba7c9..9086b3e3065 100644 --- a/libcpp/line-map.c +++ b/libcpp/line-map.c @@ -46,6 +46,10 @@ static source_location linemap_macro_loc_to_exp_point (struct line_maps *, source_location, const struct line_map **); +/* Counters defined in macro.c. */ +extern unsigned num_expanded_macros_counter; +extern unsigned num_macro_tokens_counter; + /* Initialize a line map set. */ void @@ -1143,3 +1147,62 @@ linemap_dump_location (struct line_maps *set, fprintf (stream, "{P:%s;F:%s;L:%d;C:%d;S:%d;M:%p;E:%d,LOC:%d}", path, from, l, c, s, (void*)map, e, loc); } + +/* Compute and return statistics about the memory consumption of some + parts of the line table SET. */ + +void +linemap_get_statistics (struct line_maps *set, + struct linemap_stats *s) +{ + size_t ordinary_maps_allocated_size, ordinary_maps_used_size, + macro_maps_allocated_size, macro_maps_used_size, + macro_maps_locations_size = 0, duplicated_macro_maps_locations_size = 0; + + struct line_map *cur_map; + + ordinary_maps_allocated_size = + LINEMAPS_ORDINARY_ALLOCATED (set) * sizeof (struct line_map); + + ordinary_maps_used_size = + LINEMAPS_ORDINARY_USED (set) * sizeof (struct line_map); + + macro_maps_allocated_size = + LINEMAPS_MACRO_ALLOCATED (set) * sizeof (struct line_map); + + for (cur_map = LINEMAPS_MACRO_MAPS (set); + cur_map && cur_map <= LINEMAPS_LAST_MACRO_MAP (set); + ++cur_map) + { + unsigned i; + + linemap_assert (linemap_macro_expansion_map_p (cur_map)); + + macro_maps_locations_size += + 2 * MACRO_MAP_NUM_MACRO_TOKENS (cur_map) * sizeof (source_location); + + for (i = 0; i < 2 * MACRO_MAP_NUM_MACRO_TOKENS (cur_map); i += 2) + { + if (MACRO_MAP_LOCATIONS (cur_map)[i] == + MACRO_MAP_LOCATIONS (cur_map)[i + 1]) + duplicated_macro_maps_locations_size += + sizeof (source_location); + } + } + + macro_maps_used_size = + LINEMAPS_MACRO_USED (set) * sizeof (struct line_map); + + s->num_ordinary_maps_allocated = LINEMAPS_ORDINARY_ALLOCATED (set); + s->num_ordinary_maps_used = LINEMAPS_ORDINARY_USED (set); + s->ordinary_maps_allocated_size = ordinary_maps_allocated_size; + s->ordinary_maps_used_size = ordinary_maps_used_size; + s->num_expanded_macros = num_expanded_macros_counter; + s->num_macro_tokens = num_macro_tokens_counter; + s->num_macro_maps_used = LINEMAPS_MACRO_USED (set); + s->macro_maps_allocated_size = macro_maps_allocated_size; + s->macro_maps_locations_size = macro_maps_locations_size; + s->macro_maps_used_size = macro_maps_used_size; + s->duplicated_macro_maps_locations_size = + duplicated_macro_maps_locations_size; +} diff --git a/libcpp/macro.c b/libcpp/macro.c index d760383b548..2d0eeaa0388 100644 --- a/libcpp/macro.c +++ b/libcpp/macro.c @@ -165,6 +165,13 @@ static void consume_next_token_from_context (cpp_reader *pfile, source_location *); static const cpp_token* cpp_get_token_1 (cpp_reader *, source_location *); +/* Statistical counter tracking the number of macros that got + expanded. */ +unsigned num_expanded_macros_counter = 0; +/* Statistical counter tracking the total number tokens resulting + from macro expansion. */ +unsigned num_macro_tokens_counter = 0; + /* Emits a warning if NODE is a macro defined in the main file that has not been used. */ int @@ -1082,10 +1089,15 @@ enter_macro_context (cpp_reader *pfile, cpp_hashnode *node, (const cpp_token **) macro_tokens->base, count); + num_macro_tokens_counter += count; } else - _cpp_push_token_context (pfile, node, macro->exp.tokens, - macro_real_token_count (macro)); + { + unsigned tokens_count = macro_real_token_count (macro); + _cpp_push_token_context (pfile, node, macro->exp.tokens, + tokens_count); + num_macro_tokens_counter += tokens_count; + } } if (pragma_buff) @@ -1095,13 +1107,18 @@ enter_macro_context (cpp_reader *pfile, cpp_hashnode *node, padding_token (pfile, result), 1); do { + unsigned tokens_count; _cpp_buff *tail = pragma_buff->next; pragma_buff->next = NULL; + tokens_count = ((const cpp_token **) BUFF_FRONT (pragma_buff) + - (const cpp_token **) pragma_buff->base); push_ptoken_context (pfile, NULL, pragma_buff, (const cpp_token **) pragma_buff->base, - ((const cpp_token **) BUFF_FRONT (pragma_buff) - - (const cpp_token **) pragma_buff->base)); + tokens_count); pragma_buff = tail; + if (!CPP_OPTION (pfile, track_macro_expansion)) + num_macro_tokens_counter += tokens_count; + } while (pragma_buff != NULL); return 2; @@ -1711,6 +1728,8 @@ replace_args (cpp_reader *pfile, cpp_hashnode *node, cpp_macro *macro, else push_ptoken_context (pfile, node, buff, first, tokens_buff_count (buff)); + + num_macro_tokens_counter += tokens_buff_count (buff); } /* Return a special padding token, with padding inherited from SOURCE. */ @@ -2240,6 +2259,8 @@ cpp_get_token_1 (cpp_reader *pfile, source_location *location) } else { + if (pfile->context->c.macro) + ++num_expanded_macros_counter; _cpp_pop_context (pfile); if (pfile->state.in_directive) continue;