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From "Bill Stoddard" <b...@wstoddard.com>
Subject Apache 2 cycle vs instruction profiling
Date Tue, 02 Jul 2002 20:29:59 GMT
Profiled serving a 500 byte file out of mod_mem_cache (CacheEnable mem /).
This analysis covers one complete request starting at ap_read_request and
ending with ap_graceful_stop_signalled.

I've hacked Apache 2 in several places...
The most notable hack is that I remove ap_http_header_filter and send the
pre-built headers straight out of the cache. This substantially reduced the
time spent in apr_brigade_puts (and was good for a 4% or so performance
boost). Can get a lot fancier here by making sure the buffer holding the
headers is properly aligned on a page boundary.

I also shortcircuit the age and freshness calculations in mod_cache (to save
gettimeofday calls). I know we have performance problems with apr_time_now
with potential fixes being discussed.

Last hack is to do a call apr_setsocketopt(csd, APR_INCOMPLETE_READ, 1)
immediately after the call to ap_graceful_stop_signaled to cause the next
ap_read_request to go directly to select rather than calling read first. I
think this is a good optimization because we just checked for a pipelined
request (read returned EAGAIN) so no sense in calling read again. Will
submit a patch for this piece later.

Instructions = Cycles/Ratio

I assume a large ratio is probably a bad thing and indicates, among other
things, that pipeline flushes, pagefaults, etc, are occuring...  I have a
routine flow which should show transtions to the kernel (not sure if it will
show pagefaults or not) that I have not spent a lot of time on. We spend a
suprising amount of time in module log routines and logging is not enabled.

Bill

Space                      %    Cycles
=====                     ====  =====
User                      19.0  46645
Shared Library            48.6  119222
Kernel                    32.4  79405

Total                           245272 (4.22 per instruction)

/usr/local/apachetest/bin/httpd :

Subroutine Name          Source File                  Ratio Enter  %
Cycles
===============          ===========                  ===== ===== ====
======
.core_input_filter       core.c                        3.15 11     1.5 3628
.ap_rgetline_core        protocol.c                    3.05 6      1.3 3241
.get_filter_handle       util_filter.c                 4.58 2      1.1 2705
.ap_find_token           util.c                        4.16 6      0.9 2306
.add_any_filter_handle   util_filter.c                 4.37 6      0.9 2090
.net_time_filter         core.c                        2.90 12     0.7 1713
._ptrgl                  ptrgl.s                       4.13 66     0.7 1637
.fix_hostname            vhost.c                       3.65 1      0.7 1626
.core_output_filter      core.c                        3.63 2      0.6 1469
.ap_update_child_status_from_indexes scoreboard.c     17.94 2      0.6 1435
.add_any_filter          util_filter.c                 5.46 1      0.6 1403
.ap_get_brigade          util_filter.c                 3.32 25     0.4 1079
.ap_set_keepalive        http_protocol.c               3.50 2      0.4 1036
._moveeq                 moveeq.s                      4.72 14     0.4 1025
.ap_read_request         protocol.c                    6.32 1      0.3 834
.ap_getword_white        util.c                        3.09 2      0.3 784
.ap_get_mime_headers     protocol.c                    3.32 1      0.3 756
.ap_content_length_filter protocol.c                   4.33 1      0.3 736
.ap_pass_brigade         util_filter.c                 4.82 5      0.2 584
.ap_recent_rfc822_date   util_time.c                   2.74 1      0.2 520
.log_error_core          log.c                         4.28 4      0.2 513
.read_request_line       protocol.c                    4.15 1      0.2 502
.apr_palloc              glink.s                       3.71 22     0.2 490
.apr_brigade_destroy     glink.s                       6.51 12     0.2 469
.isspace                 glink.s                       3.45 22     0.2 455
.core_create_req         core.c                        7.57 1      0.2 439
.apr_table_get           glink.s                       4.50 16     0.2 432
.ap_run_log_transaction  protocol.c                   12.05 1      0.2 398
.ap_run_quick_handler    config.c                     13.96 1      0.2 391
.cached_explode          util_time.c                   5.61 1      0.1 365
.ap_run_create_request   request.c                     8.06 1      0.1 363
.ap_log_error            log.c                         3.82 4      0.1 336
.tolower                 glink.s                       2.93 19     0.1 334
.ap_http_filter          http_protocol.c               3.35 2      0.1 332
.ap_add_output_filters_by_type core.c                 14.32 1      0.1 329
.apr_brigade_create      glink.s                       3.48 15     0.1 313
.__divi64                glink.s                      12.72 4      0.1 305
.isalpha                 glink.s                       2.64 19     0.1 301
.lookup_builtin_method   http_protocol.c              10.91 1      0.1 295
.apr_setsocketopt        glink.s                       4.39 11     0.1 290
.ap_process_http_connection http_core.c                8.17 0      0.1 286
.writev_it_all           core.c                        6.07 1      0.1 273
.basic_http_header       http_protocol.c               3.09 1      0.1 260
.http_create_request     http_core.c                   6.19 1      0.1 235
.strlen                  glink.s                       9.76 4      0.1 234
.apr_brigade_split_line  glink.s                       6.39 6      0.1 230
.apr_table_make          glink.s                       6.28 6      0.1 226
.form_header_field       http_protocol.c               2.73 2      0.1 213
.avoid_xlc_bug           core.c                        4.79 11     0.1 211
.ap_byterange_filter     http_protocol.c               7.26 1      0.1 210
.ap_run_post_read_request protocol.c                   5.88 1      0.1 200
.ap_discard_request_body http_protocol.c               2.82 1      0.1 200
.apr_pstrcatv            glink.s                      29.67 1      0.1 178
.strchr                  glink.s                       7.39 4      0.1 177
.basic_http_header_check http_protocol.c               4.18 1      0.1 176
.check_pipeline_flush    http_request.c                3.97 1      0.1 175
.ap_update_vhost_from_headers vhost.c                  5.61 1      0.1 174
.memset                  glink.s                       6.95 4      0.1 167
.strncasecmp             glink.s                       5.44 5      0.1 163
.create_empty_config     config.c                      7.75 1      0.1 163
.apr_brigade_puts        glink.s                       6.48 4      0.1 156
.ap_process_request      http_request.c                5.68 1      0.1 153
.ap_graceful_stop_signalled worker.c                  51.13 1      0.1 153
.apr_brigade_write       glink.s                       3.18 8      0.1 153
.ap_parse_uri            protocol.c                    3.40 1      0.1 150
.ap_set_byterange        http_protocol.c               4.54 1      0.1 145
.ap_add_output_filter    util_filter.c                17.40 1      0.1 139
.apr_pool_destroy        glink.s                      22.80 1      0.1 137
.ap_basic_http_header    http_protocol.c               9.04 1      0.1 136
.apr_table_unset         glink.s                      10.73 2      0.1 129
.apr_sendv               glink.s                      20.00 1      0.0 120
.ap_update_child_status  scoreboard.c                  8.30 2      0.0 116
.ap_index_of_response    http_protocol.c               6.09 1      0.0 116
.ap_get_limit_req_body   core.c                       15.43 1      0.0 108
.apr_array_make          glink.s                      17.97 1      0.0 108
.ap_get_server_version   core.c                       21.36 1      0.0 107
.remove_any_filter       util_filter.c                 3.44 2      0.0 107
.apr_table_mergen        glink.s                       8.72 2      0.0 105
.isdigit                 glink.s                       8.20 2      0.0 98
.apr_table_overlap       glink.s                      16.00 1      0.0 96
.apr_pstrdup             glink.s                      15.73 1      0.0 94
.apr_table_addn          glink.s                       3.93 4      0.0 94
.ap_get_output_filter_handle util_filter.c            15.53 2      0.0 93
.apr_off_t_toa           glink.s                      15.53 1      0.0 93
.apr_uri_parse           glink.s                      15.33 1      0.0 92
.apr_brigade_partition   glink.s                       3.73 4      0.0 90
.apr_pool_create_ex      glink.s                      14.60 1      0.0 88
.apr_brigade_split       glink.s                       2.85 5      0.0 86
.ap_make_method_list     http_protocol.c               3.25 1      0.0 81
.apr_parse_addr_port     glink.s                      13.10 1      0.0 79
.ap_set_content_length   protocol.c                    3.73 1      0.0 75
.ap_remove_output_filter util_filter.c                 3.42 2      0.0 68
.ap_explode_recent_gmt   util_time.c                  17.05 1      0.0 68
.apr_psprintf            glink.s                       5.57 2      0.0 67
.ap_set_content_type     http_protocol.c               2.91 1      0.0 61
.apr_bucket_flush_create glink.s                       9.67 1      0.0 58
.apr_brigade_cleanup     glink.s                       9.17 1      0.0 55
.ap_create_request_config config.c                    54.20 1      0.0 54
.ap_add_output_filter_handle util_filter.c             2.83 3      0.0 51
.ap_method_number_of     http_protocol.c               2.40 1      0.0 48
.ap_finalize_request_protocol protocol.c               2.47 1      0.0 47
.apr_table_setn          glink.s                       2.39 3      0.0 43
.apr_time_now            glink.s                       6.23 1      0.0 37
.ap_add_input_filter_handle util_filter.c              2.83 2      0.0 34
.apr_pstrmemdup          glink.s                       5.67 1      0.0 34
.apr_bucket_eos_create   glink.s                       2.17 1      0.0 13

Shlib Subroutine         Source File                  Ratio Enter  %
Cycles
================         ===========                  ===== ===== ====
======
.memset                  memset.s                      4.99 9      5.5 13580
.apr_table_get           apr_tables.c                  3.15 21     2.1 5030
.__is_wctype_std         libc/__is_wctype_std.c        3.34 68     1.8 4536
.strcasecmp              libaixinet/strcasecmp.c       3.47 12     1.8 4458
.apr_palloc              apr_pools.c                   1.97 104    1.5 3680
.apr_vformatter          apr_snprintf.c                3.83 2      1.3 3231
.apr_table_setn          apr_tables.c                  2.97 13     1.2 2936
._moveeq                 moveeq.s                      3.83 11     1.1 2818
.apr_setsocketopt        sockopt.c                     3.53 13     1.1 2753
.__divu64                divu64.s                      2.75 3      1.1 2675
.memchr                  libc/memchr.c                 3.61 11     1.1 2668
.__divi64                divi64.s                      2.71 5      1.0 2509
.strlen                  strlen.s                      3.18 17     0.8 2077
.pthread_mutex_lock      libpthreads/mutex.c          10.40 3      0.8 1841
.apr_bucket_alloc        apr_buckets_alloc.c           2.72 28     0.7 1684
.apr_brigade_cleanup     apr_brigade.c                 2.74 17     0.7 1648
.apr_brigade_puts        apr_brigade.c                 2.32 5      0.6 1585
.isspace                 libc/isspace.c                2.84 23     0.5 1306
.apr_brigade_split_line  apr_brigade.c                 2.43 6      0.5 1297
.apr_brigade_write       apr_brigade.c                 2.22 11     0.5 1247
.apr_brigade_create      apr_brigade.c                 2.11 21     0.5 1199
.strncasecmp             libaixinet/strcasecmp.c       2.74 6      0.5 1177
.cache_url_handler       mod_cache.c                   5.88 1      0.5 1147
.allocator_alloc         apr_pools.c                   4.47 5      0.5 1143
._moveeq                 moveeq.s                      4.70 16     0.5 1118
.apr_pool_cleanup_register apr_pools.c                 2.17 22     0.4 1099
.apr_bucket_free         apr_buckets_alloc.c           2.87 28     0.4 1080
._ptrgl                  ptrgl.s                       2.46 72     0.4 1063
._ptrgl                  ptrgl.s                       2.65 63     0.4 1000
.allocator_free          apr_pools.c                   4.23 5      0.4 960
.tolower                 libc/tolower.c                2.87 19     0.4 926
.apr_bucket_simple_copy  apr_buckets_simple.c          3.39 14     0.4 902
.multi_log_transaction   mod_log_config.c             28.55 1      0.4 885
.make_array_core         apr_tables.c                  2.40 12     0.3 790
.apr_pool_cleanup_kill   apr_pools.c                   4.05 12     0.3 786
.unserialize_table       mod_mem_cache.c               5.17 4      0.3 781
.strchr                  strchr.s                      2.90 5      0.3 778
.apr_array_push_noclear  apr_tables.c                  1.69 20     0.3 776
.isupper                 libc/isupper.c                1.94 19     0.3 739
.isalpha                 libc/isalpha.c                1.92 19     0.3 730
.apr_recv                sendrecv.c                    6.67 2      0.3 693
.heap_bucket_destroy     apr_buckets_heap.c            2.49 17     0.3 644
.apr_uri_parse           apr_uri.c                     5.22 1      0.3 627
.match_headers           mod_setenvif.c               16.49 1      0.3 627
.apr_table_mergen        apr_tables.c                  3.11 2      0.3 621
.find_entry              cache_hash.c                  4.42 1      0.3 619
.apr_table_overlap       apr_tables.c                  2.98 1      0.2 611
.pthread_mutex_unlock    libpthreads/mutex.c           5.02 3      0.2 603
.ap_cache_get_cachetype  cache_util.c                 10.48 1      0.2 597
.overlap_hash            apr_tables.c                  3.50 4      0.2 588
.apr_palloc              glink.s                       2.62 37     0.2 583
.apr_bucket_simple_split apr_buckets_simple.c          1.82 10     0.2 564
.apr_table_unset         apr_tables.c                  2.72 2      0.2 564
.read                    libc/read.c                   7.89 2      0.2 552
.spin_lock_global_ppc_up locks_ppc_up.s               16.71 3      0.2 551
.apr_brigade_destroy     apr_brigade.c                 2.68 12     0.2 547
.apr_bucket_alloc        glink.s                       3.21 28     0.2 539
.heap_bucket_read        apr_buckets_heap.c            1.95 30     0.2 528
.open_entity             mod_mem_cache.c               6.32 1      0.2 512
.apr_brigade_partition   apr_brigade.c                 3.31 4      0.2 476
.apr_table_make          apr_tables.c                  2.50 10     0.2 475
.islower                 libc/islower.c                5.89 4      0.2 471
.run_cleanups            apr_pools.c                   9.58 1      0.2 460
.apr_pool_cleanup_kill   glink.s                       6.06 12     0.2 437
.socket_bucket_read      apr_buckets_socket.c          3.62 2      0.2 428
.pthread_mutex_lock      glink.s                      23.62 3      0.2 425
.cache_out_filter        mod_cache.c                   4.35 1      0.2 387
.apr_palloc              glink.s                       3.07 21     0.2 387
.apr_sendv               sendrecv.c                    8.37 1      0.2 385
.apr_pvsprintf           apr_pools.c                   3.91 2      0.2 383
.apr_pstrcat             apr_strings.c                 3.15 1      0.2 378
.conv_10                 apr_snprintf.c                2.64 4      0.2 370
.apr_bucket_heap_make    apr_buckets_heap.c            3.81 3      0.1 365
.apr_pool_cleanup_register glink.s                     2.88 21     0.1 362
.apr_bucket_shared_split apr_buckets_refcount.c        2.00 10     0.1 360
.apr_wait_for_io_or_timeout sendrecv.c                 6.40 1      0.1 352
.apr_bucket_shared_destroy glink.s                     3.45 17     0.1 352
.cache_select_url        cache_storage.c               4.76 1      0.1 343
.strcasecmp              glink.s                       5.13 11     0.1 339
.apr_table_addn          apr_tables.c                  2.14 4      0.1 333
.apr_pstrdup             apr_strings.c                 2.84 5      0.1 330
.apr_parse_addr_port     sockaddr.c                    5.30 1      0.1 323
.apr_bucket_shared_destroy apr_buckets_refcount.c      3.07 17     0.1 313
.kread                   glink.s                      26.03 2      0.1 312
.pthread_mutex_unlock    glink.s                      16.82 3      0.1 303
.isdigit                 libc/isdigit.c                5.03 3      0.1 302
.apr_brigade_split       apr_brigade.c                 2.12 5      0.1 292
.apr_allocator_alloc     glink.s                      12.09 4      0.1 290
.spin_unlock_global_ppc_up locks_ppc_up.s              6.94 3      0.1 271
.apr_thread_mutex_lock   thread_mutex.c                5.60 3      0.1 269
.decrement_refcount      mod_mem_cache.c              10.18 1      0.1 265
.apr_pool_destroy        apr_pools.c                   4.97 1      0.1 263
.writev                  libc/write.c                 13.13 1      0.1 263
._ptrgl                  ptrgl.s                      10.81 4      0.1 259
.strlen                  glink.s                       5.28 8      0.1 254
.read_headers            mod_mem_cache.c               3.96 1      0.1 253
.apr_bucket_simple_split glink.s                       4.07 10     0.1 244
.apr_pstrcatv            apr_strings.c                 2.88 1      0.1 242
.read_real_time          read_real_time.s              8.61 1      0.1 241
.__pthread_geterrno_addr libpthreads/lib_lock.c        4.91 4      0.1 236
.apr_pool_create_ex      apr_pools.c                   3.50 1      0.1 235
._Errno                  libc/errno.c                  3.99 3      0.1 228
.apr_bucket_shared_make  glink.s                      12.47 3      0.1 224
.read_body               mod_mem_cache.c               5.32 1      0.1 223
.apr_atomic_dec          apr_atomic.c                  7.10 1      0.1 220
.apr_pstrmemdup          glink.s                      36.37 1      0.1 218
._ptrgl                  ptrgl.s                       8.62 4      0.1 207
.memchr                  glink.s                       3.18 10     0.1 191
._ptrgl                  ptrgl.s                       6.33 5      0.1 190
.memcache_gdsf_algorithm mod_mem_cache.c               6.68 2      0.1 187
.apr_off_t_toa           apr_strings.c                 2.84 1      0.1 182
.apr_atomic_inc          apr_atomic.c                  6.14 1      0.1 178
.apr_pstrndup            apr_strings.c                 5.72 1      0.1 177
.cache_run_open_entity   cache_storage.c               5.50 1      0.1 176
.ap_cache_liststr        cache_util.c                  4.14 2      0.1 174
.read                    glink.s                      14.18 2      0.1 170
.apr_allocator_free      glink.s                       7.08 4      0.1 170
.gettimeofday            libc/gettimeofday.c           3.96 1      0.1 166
.ap_cache_tokstr         cache_util.c                  3.66 1      0.1 165
.memcmp                  memcmp.s                      4.41 1      0.1 159
.apr_thread_mutex_unlock thread_mutex.c                3.24 3      0.1 156
.apr_pstrmemdup          apr_strings.c                 3.33 2      0.1 153
.apr_table_setn          glink.s                       2.50 10     0.1 150
.memset                  glink.s                      12.15 2      0.1 146
.apr_recv                glink.s                      11.87 2      0.1 142
.islower                 glink.s                       5.60 4      0.1 134
.apr_thread_mutex_lock   glink.s                      11.12 2      0.1 133
.apr_time_now            time.c                        5.29 1      0.1 132
.ap_set_content_type     glink.s                      21.80 1      0.1 131
.__divi64                glink.s                      21.70 1      0.1 130
.apr_vformatter          glink.s                      10.83 2      0.1 130
.strlen                  glink.s                       4.33 5      0.1 130
.cache_hash_get          glink.s                      21.33 1      0.1 128
.memcmp                  glink.s                      21.30 1      0.1 128
._Errno                  glink.s                       7.04 3      0.1 127
.ap_cache_get_cachetype  glink.s                      20.77 1      0.1 125
.ap_cache_tokstr         glink.s                      20.60 1      0.1 124
.apr_table_make          glink.s                       5.09 4      0.0 122
.apr_bucket_heap_create  glink.s                      10.13 2      0.0 122
.ap_cache_liststr        glink.s                      10.08 2      0.0 121
.cache_find              glink.s                      18.63 1      0.0 112
.cache_update            glink.s                      18.63 1      0.0 112
.cache_pq_change_priority cache_pqueue.c               5.30 1      0.0 111
.apr_bucket_shared_copy  apr_buckets_refcount.c        1.69 4      0.0 108
.apr_atomic_dec          glink.s                      17.50 1      0.0 105
.kwritev                 glink.s                      17.13 1      0.0 103
.gettimeofday            glink.s                      17.10 1      0.0 103
.apr_bucket_eos_create   apr_buckets_eos.c             2.55 2      0.0 102
.apr_bucket_socket_create apr_buckets_socket.c         4.82 1      0.0 101
.cache_find              cache_cache.c                 7.71 1      0.0 100
.bzero                   glink.s                      16.67 1      0.0 100
.ap_log_error            glink.s                       4.16 4      0.0 100
.free_proc_chain         apr_pools.c                   6.97 1      0.0 98
.apr_table_get           glink.s                       3.25 5      0.0 98
.cache_read_entity_body  cache_storage.c               9.74 1      0.0 97
.writev                  glink.s                      16.00 1      0.0 96
.apr_bucket_heap_create  apr_buckets_heap.c            1.79 2      0.0 93
.time_base_to_time       libc/POWER/time_base_to_time.c  1.66 1      0.0 93
.apr_pstrdup             glink.s                       5.16 3      0.0 93
.memset                  glink.s                      15.47 1      0.0 93
.ap_pass_brigade         glink.s                       7.70 2      0.0 92
.select                  glink.s                      15.30 1      0.0 92
.apr_bucket_shared_make  apr_buckets_refcount.c        5.08 3      0.0 91
.apr_thread_mutex_lock   glink.s                      15.13 1      0.0 91
.apr_bucket_immortal_create apr_buckets_simple.c          3.54 1      0.0 85
.isdigit                 glink.s                      13.77 1      0.0 83
.ap_add_output_filter    glink.s                      13.53 1      0.0 81
.minchild                cache_pqueue.c                4.48 1      0.0 76
.apr_bucket_simple_copy  glink.s                       3.08 4      0.0 74
.cache_generate_key_default cache_storage.c               4.29 1      0.0 73
.cache_read_entity_body  glink.s                      11.87 1      0.0 71
.apr_bucket_free         glink.s                       2.93 4      0.0 70
.apr_bucket_eos_make     apr_buckets_eos.c             4.80 2      0.0 67
.apr_array_make          apr_tables.c                  3.36 1      0.0 67
.cache_pq_percolate_down cache_pqueue.c                3.94 1      0.0 67
.cache_update            cache_cache.c                 2.16 1      0.0 67
.apr_psprintf            apr_pools.c                   1.83 2      0.0 66
.apr_brigade_create      glink.s                      10.97 1      0.0 66
.apr_thread_mutex_unlock glink.s                       5.48 2      0.0 66
.ap_set_keepalive        glink.s                       5.45 2      0.0 65
.apr_bucket_eos_create   glink.s                      10.77 1      0.0 65
.apr_allocator_mutex_get apr_pools.c                  15.90 2      0.0 64
.strncasecmp             glink.s                      10.47 1      0.0 63
.memchr                  glink.s                      10.17 1      0.0 61
.brigade_cleanup         apr_brigade.c                15.00 4      0.0 60
.apr_bucket_flush_create apr_buckets_flush.c           2.86 1      0.0 57
.cache_read_entity_headers cache_storage.c               2.60 1      0.0 57
.apr_bucket_immortal_create glink.s                       9.23 1      0.0 55
.apr_getsocketopt        glink.s                       9.10 1      0.0 55
.apr_atomic_inc          glink.s                       9.00 1      0.0 54
.simple_bucket_read      apr_buckets_simple.c          3.26 2      0.0 52
.apr_pstrcat             glink.s                       8.33 1      0.0 50
.cache_hash_get          cache_hash.c                  3.54 1      0.0 50
.ap_remove_output_filter glink.s                       8.10 1      0.0 49
.memcache_get_pos        mod_mem_cache.c              16.00 1      0.0 48
.apr_palloc              glink.s                       3.93 2      0.0 47
.ap_get_output_filter_handle glink.s                       3.90 2      0.0
47
.apr_brigade_write       glink.s                       2.39 3      0.0 43
.strcasecmp              glink.s                       7.07 1      0.0 42
.apr_bucket_immortal_make apr_buckets_simple.c          5.86 1      0.0 41
.bzero                   memset.s                     13.27 1      0.0 40
.apr_bucket_heap_make    glink.s                       6.50 1      0.0 39
.ap_basic_http_header    glink.s                       6.17 1      0.0 37
.apr_bucket_socket_make  apr_buckets_socket.c          5.23 1      0.0 37
.apr_pstrndup            glink.s                       5.63 1      0.0 34
.strchr                  glink.s                       5.23 1      0.0 31
.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_allocator_alloc     apr_pools.c                   7.00 4      0.0 28
.apr_getsocketopt        sockopt.c                     4.47 1      0.0 27
.apr_setsocketopt        glink.s                       2.17 2      0.0 26
.isspace                 glink.s                       4.07 1      0.0 24
.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
.apr_brigade_puts        glink.s                       2.17 1      0.0 13
.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
.cache_pq_change_priority glink.s                       2.17 1      0.0 13
.apr_pool_cleanup_register glink.s                       2.17 1      0.0 13
.apr_thread_mutex_unlock glink.s                       2.17 1      0.0 13
.eos_bucket_read         apr_buckets_eos.c             2.75 1      0.0 11


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