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From "Bill Stoddard" <b...@wstoddard.com>
Subject Apache 2 cycle vs instruction profiling (2.0.40-dev)
Date Wed, 03 Jul 2002 04:09:05 GMT
Here is a profile of 2.0.40-dev HEAD as of an hour or so ago. It is an
improvement over the earlier runs. Instruction count dropped from 58115 to
54888. Part of that was eliminating the duplicate ap_set_keepalive() call.

Bill

Space                      %    Cycles
=====                     ====  =====
User                      18.4  44458
Shared Library            47.9  115610
Kernel                    33.7  81465

Total                           241533 (4.40 per instruction)

/usr/local/apachetest/bin/httpd :

Subroutine Name          Source File                  Ratio Enter  %
Cycles
===============          ===========                  ===== ===== ====
======
.core_input_filter       core.c                        3.05 11     1.5 3515
.ap_rgetline_core        protocol.c                    3.32 6      1.4 3428
.get_filter_handle       util_filter.c                 4.62 2      1.1 2730
.add_any_filter_handle   util_filter.c                 4.55 6      0.9 2173
._ptrgl                  ptrgl.s                       4.94 66     0.8 1956
.net_time_filter         core.c                        3.16 12     0.8 1865
.fix_hostname            vhost.c                       3.61 1      0.7 1611
.core_output_filter      core.c                        3.56 2      0.6 1440
.add_any_filter          util_filter.c                 4.97 1      0.5 1277
.ap_update_child_status_from_indexes scoreboard.c     15.75 2      0.5 1260
.ap_get_brigade          util_filter.c                 3.50 25     0.5 1137
._moveeq                 moveeq.s                      4.98 14     0.4 1080
.ap_find_token           util.c                        4.45 3      0.4 1019
.ap_read_request         protocol.c                    6.35 1      0.3 839
.ap_get_mime_headers     protocol.c                    3.51 1      0.3 800
.ap_content_length_filter protocol.c                   5.03 1      0.3 794
.ap_getword_white        util.c                        2.83 2      0.3 719
.ap_pass_brigade         util_filter.c                 5.30 5      0.3 642
.ap_set_keepalive        http_protocol.c               3.77 1      0.2 558
.read_request_line       protocol.c                    4.48 1      0.2 542
.apr_palloc              glink.s                       3.82 22     0.2 504
.log_error_core          log.c                         3.99 4      0.2 479
.ap_recent_rfc822_date   util_time.c                   2.47 1      0.2 470
.ap_run_quick_handler    config.c                     16.55 1      0.2 464
.isspace                 glink.s                       2.88 22     0.2 380
.ap_http_filter          http_protocol.c               3.74 2      0.2 371
.lookup_builtin_method   http_protocol.c              13.62 1      0.2 368
.tolower                 glink.s                       2.90 19     0.1 331
.ap_process_http_connection http_core.c                9.24 0      0.1 323
.core_create_req         core.c                        5.49 1      0.1 318
.apr_brigade_destroy     glink.s                       6.62 8      0.1 318
.isalpha                 glink.s                       2.77 19     0.1 316
.ap_run_create_request   request.c                     6.82 1      0.1 307
.apr_brigade_split_line  glink.s                       8.47 6      0.1 305
.ap_log_error            log.c                         3.32 4      0.1 292
.ap_add_output_filters_by_type core.c                 12.68 1      0.1 292
.ap_run_log_transaction  protocol.c                    8.74 1      0.1 288
.writev_it_all           core.c                        6.38 1      0.1 287
.ap_run_post_read_request protocol.c                   7.97 1      0.1 271
.http_create_request     http_core.c                   7.09 1      0.1 270
.apr_setsocketopt        glink.s                       3.82 11     0.1 252
.basic_http_header       http_protocol.c               2.98 1      0.1 250
.ap_process_request      http_request.c                9.14 1      0.1 247
.apr_table_get           glink.s                       3.23 12     0.1 232
.cached_explode          util_time.c                   3.55 1      0.1 230
.avoid_xlc_bug           core.c                        5.16 11     0.1 227
.apr_brigade_create      glink.s                       3.41 11     0.1 225
.apr_table_make          glink.s                       6.19 6      0.1 223
.create_empty_config     config.c                     10.49 1      0.1 220
.check_pipeline_flush    http_request.c                4.89 1      0.1 215
.ap_discard_request_body http_protocol.c               3.03 1      0.1 215
.strlen                  glink.s                       8.45 4      0.1 203
.ap_update_vhost_from_headers vhost.c                  6.34 1      0.1 196
.basic_http_header_check http_protocol.c               4.68 1      0.1 196
.__divi64                glink.s                      10.19 3      0.1 184
.form_header_field       http_protocol.c               2.33 2      0.1 182
.ap_update_child_status  scoreboard.c                 12.27 2      0.1 172
.isdigit                 glink.s                      14.00 2      0.1 168
.apr_brigade_cleanup     glink.s                       5.58 5      0.1 167
.ap_parse_uri            protocol.c                    3.78 1      0.1 166
.apr_sendv               glink.s                      27.54 1      0.1 165
.apr_brigade_puts        glink.s                       6.88 4      0.1 165
.apr_brigade_write       glink.s                       3.13 8      0.1 150
.apr_pstrcatv            glink.s                      24.75 1      0.1 148
.ap_byterange_filter     http_protocol.c               4.59 1      0.1 133
.ap_add_output_filter    util_filter.c                16.66 1      0.1 133
.apr_pool_destroy        glink.s                      21.67 1      0.1 130
.apr_pstrdup             glink.s                      20.67 1      0.1 124
.ap_graceful_stop_signalled worker.c                  41.17 1      0.1 124
.apr_off_t_toa           glink.s                      20.33 1      0.1 122
.apr_uri_parse           glink.s                      19.88 1      0.0 119
.ap_basic_http_header    http_protocol.c               7.87 1      0.0 118
.ap_set_content_length   protocol.c                    5.85 1      0.0 117
.strchr                  glink.s                       4.69 4      0.0 112
.remove_any_filter       util_filter.c                 3.47 2      0.0 108
.ap_make_method_list     http_protocol.c               4.14 1      0.0 104
.ap_set_byterange        http_protocol.c               3.22 1      0.0 103
.ap_get_server_version   core.c                       19.25 1      0.0 96
.apr_array_make          glink.s                      15.96 1      0.0 96
.ap_remove_output_filter util_filter.c                 4.72 2      0.0 94
.memset                  glink.s                       3.90 4      0.0 94
.ap_set_content_type     http_protocol.c               4.18 1      0.0 88
.apr_table_mergen        glink.s                      14.62 1      0.0 88
.apr_table_overlap       glink.s                      14.42 1      0.0 86
.apr_table_addn          glink.s                       3.49 4      0.0 84
.apr_parse_addr_port     glink.s                      13.08 1      0.0 78
.ap_get_output_filter_handle util_filter.c            12.83 2      0.0 77
.apr_brigade_partition   glink.s                       3.16 4      0.0 76
.ap_index_of_response    http_protocol.c               3.87 1      0.0 74
.ap_get_limit_req_body   core.c                       10.39 1      0.0 73
.apr_brigade_split       glink.s                       2.35 5      0.0 70
.apr_time_now            glink.s                      10.79 1      0.0 65
.apr_pool_create_ex      glink.s                      10.08 1      0.0 60
.apr_bucket_flush_create glink.s                       9.50 1      0.0 57
.strncasecmp             glink.s                       4.60 2      0.0 55
.ap_add_output_filter_handle util_filter.c             3.00 3      0.0 54
.ap_method_number_of     http_protocol.c               2.40 1      0.0 48
.ap_finalize_request_protocol protocol.c               2.42 1      0.0 46
.ap_create_request_config config.c                     38.75 1      0.0 39
.apr_pstrmemdup          glink.s                       5.75 1      0.0 34
.ap_add_input_filter_handle util_filter.c              2.83 2      0.0 34
.apr_psprintf            glink.s                       5.58 1      0.0 34
.apr_table_setn          glink.s                       2.17 2      0.0 26
.apr_table_unset         glink.s                       2.17 2      0.0 26
.apr_bucket_eos_create   glink.s                       2.17 1      0.0 13
.ap_explode_recent_gmt   util_time.c                   2.75 1      0.0 11

Shlib Subroutine         Source File                  Ratio Enter  %
Cycles
================         ===========                  ===== ===== ====
======
.memset                  memset.s                      5.63 9      6.3 15311
.__is_wctype_std         libc/__is_wctype_std.c        3.41 66     1.9 4498
.apr_table_get           apr_tables.c                  3.26 17     1.8 4255
.apr_palloc              apr_pools.c                   2.13 95     1.5 3641
._moveeq                 moveeq.s                      4.47 11     1.4 3283
.__divu64                divu64.s                      2.72 3      1.1 2675
.memchr                  libc/memchr.c                 3.61 11     1.1 2667
.apr_table_setn          apr_tables.c                  3.04 12     1.1 2633
.apr_setsocketopt        sockopt.c                     3.34 13     1.1 2599
.strcasecmp              libaixinet/strcasecmp.c       3.70 7      1.0 2519
.__divi64                divi64.s                      2.78 4      1.0 2308
.strlen                  strlen.s                      3.39 14     0.8 1877
.apr_brigade_cleanup     apr_brigade.c                 3.05 17     0.8 1839
.apr_vformatter          apr_snprintf.c                4.32 1      0.8 1824
.pthread_mutex_lock      libpthreads/mutex.c          10.02 3      0.7 1774
.apr_bucket_alloc        apr_buckets_alloc.c           2.55 28     0.7 1580
.apr_brigade_puts        apr_brigade.c                 2.31 5      0.7 1578
.apr_brigade_split_line  apr_brigade.c                 2.81 6      0.6 1498
.isspace                 libc/isspace.c                3.08 23     0.6 1418
.apr_brigade_write       apr_brigade.c                 2.13 11     0.5 1198
.cache_url_handler       mod_cache.c                   5.79 1      0.5 1130
.multi_log_transaction   mod_log_config.c             36.36 1      0.5 1127
.allocator_alloc         apr_pools.c                   4.35 5      0.5 1120
._ptrgl                  ptrgl.s                       2.78 63     0.4 1050
.apr_brigade_create      apr_brigade.c                 2.23 17     0.4 1023
._ptrgl                  ptrgl.s                       2.42 70     0.4 1018
.apr_bucket_simple_copy  apr_buckets_simple.c          3.72 14     0.4 990
.apr_bucket_free         apr_buckets_alloc.c           2.56 28     0.4 963
.allocator_free          apr_pools.c                   4.19 5      0.4 953
.apr_pool_cleanup_register apr_pools.c                 2.22 18     0.4 920
._moveeq                 moveeq.s                      4.04 13     0.4 864
.tolower                 libc/tolower.c                2.64 19     0.4 851
.apr_array_push_noclear  apr_tables.c                  1.78 20     0.3 814
.make_array_core         apr_tables.c                  2.40 12     0.3 792
.strchr                  strchr.s                      2.90 5      0.3 778
.isalpha                 libc/isalpha.c                1.94 19     0.3 738
.apr_bucket_simple_split apr_buckets_simple.c          2.30 10     0.3 713
.apr_table_overlap       apr_tables.c                  3.42 1      0.3 700
.match_headers           mod_setenvif.c               18.42 1      0.3 700
.heap_bucket_destroy     apr_buckets_heap.c            2.68 17     0.3 694
.strncasecmp             libaixinet/strcasecmp.c       3.20 3      0.3 692
.find_entry              cache_hash.c                  4.74 1      0.3 663
.apr_palloc              glink.s                       3.05 36     0.3 658
.isupper                 libc/isupper.c                1.71 19     0.3 648
.run_cleanups            apr_pools.c                  12.68 1      0.3 609
.apr_uri_parse           apr_uri.c                     4.97 1      0.2 596
.overlap_hash            apr_tables.c                  3.53 4      0.2 592
.apr_pool_cleanup_kill   apr_pools.c                   4.36 8      0.2 585
.unserialize_table       mod_mem_cache.c               3.83 4      0.2 578
.pthread_mutex_unlock    libpthreads/mutex.c           4.80 3      0.2 576
.apr_table_unset         apr_tables.c                  2.71 2      0.2 561
.apr_brigade_destroy     apr_brigade.c                 4.12 8      0.2 561
.apr_bucket_alloc        glink.s                       3.28 28     0.2 550
.read                    libc/read.c                   7.40 2      0.2 518
.heap_bucket_read        apr_buckets_heap.c            1.89 30     0.2 511
.spin_lock_global_ppc_up locks_ppc_up.s               15.15 3      0.2 500
.apr_recv                sendrecv.c                    4.76 2      0.2 495
.apr_brigade_partition   apr_brigade.c                 3.43 4      0.2 493
.cache_out_filter        mod_cache.c                   5.68 1      0.2 489
.apr_table_make          apr_tables.c                  2.48 10     0.2 471
.socket_bucket_read      apr_buckets_socket.c          3.96 2      0.2 468
.apr_pool_cleanup_kill   glink.s                       9.61 8      0.2 462
.apr_pvsprintf           apr_pools.c                   9.31 1      0.2 456
.apr_bucket_shared_destroy glink.s                     4.32 17     0.2 441
.ap_cache_get_cachetype  cache_util.c                  7.66 1      0.2 436
.apr_atomic_dec          apr_atomic.c                 14.07 1      0.2 436
.open_entity             mod_mem_cache.c               5.16 1      0.2 418
.cache_select_url        cache_storage.c               5.77 1      0.2 416
.pthread_mutex_lock      glink.s                      22.47 3      0.2 404
.apr_palloc              glink.s                       3.92 17     0.2 400
.pthread_mutex_unlock    glink.s                      22.17 3      0.2 399
.apr_bucket_shared_split apr_buckets_refcount.c        2.18 10     0.2 392
.apr_table_mergen        apr_tables.c                  3.99 1      0.2 372
.kread                   glink.s                      30.69 2      0.2 368
.apr_sendv               sendrecv.c                    7.98 1      0.2 367
.apr_atomic_inc          apr_atomic.c                 12.03 1      0.1 349
.apr_bucket_heap_make    apr_buckets_heap.c            3.60 3      0.1 346
.apr_thread_mutex_lock   thread_mutex.c                7.20 3      0.1 346
.apr_table_addn          apr_tables.c                  2.20 4      0.1 343
.cache_run_open_entity   cache_storage.c              10.55 1      0.1 338
.apr_wait_for_io_or_timeout sendrecv.c                 5.97 1      0.1 328
.strcasecmp              glink.s                       8.81 6      0.1 317
.apr_pool_cleanup_register glink.s                     3.08 17     0.1 314
.apr_bucket_shared_destroy apr_buckets_refcount.c      3.08 17     0.1 314
.apr_brigade_split       apr_brigade.c                 2.26 5      0.1 312
.apr_bucket_simple_split glink.s                       5.19 10     0.1 312
.apr_pool_destroy        apr_pools.c                   5.84 1      0.1 310
.islower                 libc/islower.c                7.59 2      0.1 304
.apr_pstrdup             apr_strings.c                 2.61 5      0.1 303
.spin_unlock_global_ppc_up locks_ppc_up.s              7.26 3      0.1 283
._ptrgl                  ptrgl.s                      11.62 4      0.1 279
.apr_parse_addr_port     sockaddr.c                    4.54 1      0.1 277
.__pthread_geterrno_addr libpthreads/lib_lock.c        5.58 4      0.1 268
.read_headers            mod_mem_cache.c               3.99 1      0.1 255
.apr_bucket_shared_make  glink.s                      14.07 3      0.1 253
._Errno                  libc/errno.c                  4.39 3      0.1 250
.writev                  libc/write.c                 12.21 1      0.1 244
.isdigit                 libc/isdigit.c                4.07 3      0.1 244
.read_real_time          read_real_time.s              8.66 1      0.1 242
.apr_pstrcatv            apr_strings.c                 2.88 1      0.1 242
.apr_allocator_alloc     glink.s                       9.93 4      0.1 238
.apr_pool_create_ex      apr_pools.c                   3.56 1      0.1 238
.apr_vformatter          glink.s                      36.12 1      0.1 217
.islower                 glink.s                      18.00 2      0.1 216
.gettimeofday            libc/gettimeofday.c           5.07 1      0.1 213
.conv_10                 apr_snprintf.c                3.03 2      0.1 212
.apr_recv                glink.s                      17.04 2      0.1 204
.strlen                  glink.s                       6.72 5      0.1 202
.read_body               mod_mem_cache.c               4.70 1      0.1 197
.read                    glink.s                      16.29 2      0.1 196
._ptrgl                  ptrgl.s                       8.14 4      0.1 195
.writev                  glink.s                      30.79 1      0.1 185
.bzero                   glink.s                      30.58 1      0.1 184
.memchr                  glink.s                       3.05 10     0.1 183
.apr_off_t_toa           apr_strings.c                 2.77 1      0.1 177
.decrement_refcount      mod_mem_cache.c               6.78 1      0.1 176
.apr_table_setn          glink.s                       2.82 10     0.1 169
._ptrgl                  ptrgl.s                       5.49 5      0.1 165
.apr_allocator_mutex_get apr_pools.c                  40.50 2      0.1 162
.ap_cache_liststr        glink.s                      13.06 2      0.1 157
.memcache_gdsf_algorithm mod_mem_cache.c               5.59 2      0.1 156
.apr_array_make          apr_tables.c                  7.74 1      0.1 155
.apr_pstrmemdup          apr_strings.c                 3.32 2      0.1 152
.ap_cache_tokstr         cache_util.c                  3.24 1      0.1 146
.apr_pstrmemdup          glink.s                      23.58 1      0.1 142
.apr_thread_mutex_unlock thread_mutex.c                2.94 3      0.1 141
.memcmp                  memcmp.s                      3.88 1      0.1 140
.apr_bucket_eos_create   apr_buckets_eos.c             3.47 2      0.1 139
.apr_bucket_heap_create  apr_buckets_heap.c            2.65 2      0.1 138
.ap_cache_tokstr         glink.s                      22.00 1      0.1 132
.cache_hash_get          glink.s                      21.92 1      0.1 132
.__divi64                glink.s                      21.58 1      0.1 130
.strlen                  glink.s                       4.25 5      0.1 128
.apr_table_make          glink.s                       5.31 4      0.1 128
.memcmp                  glink.s                      21.17 1      0.1 127
.minchild                cache_pqueue.c                7.22 1      0.1 123
.apr_bucket_shared_copy  apr_buckets_refcount.c        1.87 4      0.0 120
.apr_pstrndup            apr_strings.c                 3.84 1      0.0 119
.ap_cache_liststr        cache_util.c                  2.80 2      0.0 118
.cache_find              cache_cache.c                 8.96 1      0.0 116
._Errno                  glink.s                       6.44 3      0.0 116
.select                  glink.s                      19.33 1      0.0 116
.gettimeofday            glink.s                      19.17 1      0.0 115
.apr_allocator_free      glink.s                       4.60 4      0.0 110
.apr_thread_mutex_lock   glink.s                      18.00 1      0.0 108
.apr_pstrdup             glink.s                       6.00 3      0.0 108
.apr_time_now            time.c                        4.32 1      0.0 108
.cache_generate_key_default cache_storage.c            6.32 1      0.0 108
.cache_find              glink.s                      17.46 1      0.0 105
.cache_update            cache_cache.c                 3.35 1      0.0 104
.apr_bucket_immortal_create apr_buckets_simple.c       4.28 1      0.0 103
.apr_bucket_shared_make  apr_buckets_refcount.c        5.69 3      0.0 102
.kwritev                 glink.s                      16.96 1      0.0 102
.apr_bucket_flush_create apr_buckets_flush.c           5.05 1      0.0 101
.apr_bucket_simple_copy  glink.s                       4.21 4      0.0 101
.ap_set_content_type     glink.s                      16.50 1      0.0 99
.apr_setsocketopt        glink.s                       8.19 2      0.0 98
.memset                  glink.s                       8.10 2      0.0 97
.ap_cache_get_cachetype  glink.s                      16.00 1      0.0 96
.free_proc_chain         apr_pools.c                   6.79 1      0.0 95
.apr_thread_mutex_lock   glink.s                       7.77 2      0.0 93
.time_base_to_time       libc/POWER/time_base_to_time.c  1.66 1      0.0 93
.memset                  glink.s                      15.42 1      0.0 92
.cache_update            glink.s                      15.42 1      0.0 92
.apr_bucket_socket_create apr_buckets_socket.c         4.36 1      0.0 92
.ap_log_error            glink.s                       3.70 4      0.0 89
.apr_palloc              glink.s                       7.06 2      0.0 85
.isdigit                 glink.s                      13.92 1      0.0 84
.apr_bucket_heap_create  glink.s                       6.92 2      0.0 83
.cache_pq_percolate_down cache_pqueue.c                4.85 1      0.0 82
.apr_bucket_free         glink.s                       3.40 4      0.0 82
.ap_add_output_filter    glink.s                      13.42 1      0.0 80
.cache_pq_change_priority cache_pqueue.c               3.75 1      0.0 79
.cache_read_entity_headers cache_storage.c             3.58 1      0.0 79
.apr_atomic_dec          glink.s                      12.42 1      0.0 74
.memchr                  glink.s                      12.29 1      0.0 74
.strncasecmp             glink.s                      11.96 1      0.0 72
.apr_table_get           glink.s                       2.37 5      0.0 71
.apr_bucket_eos_make     apr_buckets_eos.c             4.79 2      0.0 67
.apr_bucket_eos_create   glink.s                      10.92 1      0.0 66
.simple_bucket_read      apr_buckets_simple.c          4.09 2      0.0 66
.ap_set_keepalive        glink.s                      10.71 1      0.0 64
.cache_read_entity_body  cache_storage.c               6.33 1      0.0 63
.apr_bucket_immortal_create glink.s                   10.29 1      0.0 62
.apr_atomic_inc          glink.s                      10.12 1      0.0 61
.apr_allocator_alloc     apr_pools.c                  15.06 4      0.0 60
.apr_getsocketopt        glink.s                       9.62 1      0.0 58
.ap_pass_brigade         glink.s                       4.73 2      0.0 57
.apr_bucket_immortal_make apr_buckets_simple.c         7.18 1      0.0 50
.apr_brigade_create      glink.s                       8.17 1      0.0 49
.cache_hash_get          cache_hash.c                  3.46 1      0.0 48
.apr_getsocketopt        sockopt.c                     7.92 1      0.0 48
.apr_pstrndup            glink.s                       7.75 1      0.0 46
.ap_get_output_filter_handle glink.s                   3.83 2      0.0 46
.ap_basic_http_header    glink.s                       7.67 1      0.0 46
.brigade_cleanup         apr_brigade.c                11.25 4      0.0 45
.apr_brigade_write       glink.s                       2.17 3      0.0 39
.strcasecmp              glink.s                       6.29 1      0.0 38
.apr_bucket_socket_make  apr_buckets_socket.c          5.18 1      0.0 36
.ap_remove_output_filter glink.s                       5.83 1      0.0 35
.apr_psprintf            apr_pools.c                   1.83 1      0.0 33
.apr_pool_cleanup_register glink.s                     5.38 1      0.0 32
.isspace                 glink.s                       5.38 1      0.0 32
.strchr                  glink.s                       5.21 1      0.0 31
.cache_read_entity_body  glink.s                       4.92 1      0.0 30
.bzero                   memset.s                      9.58 1      0.0 29
.apr_bucket_destroy_noop apr_buckets.c                 7.00 4      0.0 28
.apr_allocator_free      apr_pools.c                   7.00 4      0.0 28
.apr_thread_mutex_unlock glink.s                       2.17 2      0.0 26
.apr_allocator_owner_get apr_pools.c                   5.00 2      0.0 20
.memcache_inc_frequency  mod_mem_cache.c               2.14 1      0.0 15
.apr_bucket_flush_make   apr_buckets_flush.c           2.00 1      0.0 14
.memset                  glink.s                       2.17 1      0.0 13
.cache_select_url        glink.s                       2.17 1      0.0 13
.apr_pstrdup             glink.s                       2.17 1      0.0 13
.apr_thread_mutex_unlock glink.s                       2.17 1      0.0 13
.apr_brigade_puts        glink.s                       2.17 1      0.0 13
.apr_bucket_heap_make    glink.s                       2.17 1      0.0 13
.cache_pq_change_priority glink.s                      2.17 1      0.0 13
.memcache_get_pos        mod_mem_cache.c               4.00 1      0.0 12
.eos_bucket_read         apr_buckets_eos.c             2.75 1      0.0 11


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