/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * The Mozilla Foundation . * Portions created by the Initial Developer are Copyright (C) 2011 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Taras Glek * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ /** * This file lists Telemetry histograms collected by Mozilla. The format is * * HISTOGRAM(id, minimum, maximum, bucket count, histogram kind, * human-readable description for about:telemetry) * * This file is the master list of telemetry histograms reported to Mozilla servers. * The other data reported by telemetry is listed on https://wiki.mozilla.org/Privacy/Reviews/Telemetry/Measurements * * Please note that only BOOLEAN histograms are allowed to have a minimum value * of zero, and that bucket counts should be >= 3. */ /* Convenience macro for BOOLEAN histograms. */ #define HISTOGRAM_BOOLEAN(id, message) HISTOGRAM(id, 0, 1, 2, BOOLEAN, message) /** * a11y telemetry */ HISTOGRAM_BOOLEAN(A11Y_INSTANTIATED, "has accessibility support been instantiated") HISTOGRAM_BOOLEAN(ISIMPLE_DOM_USAGE, "have the ISimpleDOM* accessibility interfaces been used") HISTOGRAM_BOOLEAN(IACCESSIBLE_TABLE_USAGE, "has the IAccessibleTable accessibility interface been used") /** * Cycle collector telemetry */ HISTOGRAM(CYCLE_COLLECTOR, 1, 10000, 50, EXPONENTIAL, "Time spent on one cycle collection (ms)") HISTOGRAM(CYCLE_COLLECTOR_VISITED_REF_COUNTED, 1, 300000, 50, EXPONENTIAL, "Number of ref counted objects visited by the cycle collector") HISTOGRAM(CYCLE_COLLECTOR_VISITED_GCED, 1, 300000, 50, EXPONENTIAL, "Number of JS objects visited by the cycle collector") HISTOGRAM(CYCLE_COLLECTOR_COLLECTED, 1, 100000, 50, EXPONENTIAL, "Number of objects collected by the cycle collector") /** * GC telemetry */ HISTOGRAM(GC_REASON, 0, 20, 20, LINEAR, "Reason (enum value) for initiating a GC") HISTOGRAM_BOOLEAN(GC_IS_COMPARTMENTAL, "Is it a compartmental GC?") HISTOGRAM_BOOLEAN(GC_IS_SHAPE_REGEN, "Is it a shape regenerating GC?") HISTOGRAM(GC_MS, 1, 10000, 50, EXPONENTIAL, "Time spent running JS GC (ms)") HISTOGRAM(GC_MARK_MS, 1, 10000, 50, EXPONENTIAL, "Time spent running JS GC mark phase (ms)") HISTOGRAM(GC_SWEEP_MS, 1, 10000, 50, EXPONENTIAL, "Time spent running JS GC sweep phase (ms)") HISTOGRAM(TELEMETRY_PING, 1, 3000, 10, EXPONENTIAL, "Time taken to submit telemetry info (ms)") HISTOGRAM_BOOLEAN(TELEMETRY_SUCCESS, "Successful telemetry submission") HISTOGRAM(MEMORY_JS_COMPARTMENTS_SYSTEM, 1, 1000, 50, EXPONENTIAL, "Total JavaScript compartments used for add-ons and internals.") HISTOGRAM(MEMORY_JS_COMPARTMENTS_USER, 1, 1000, 50, EXPONENTIAL, "Total JavaScript compartments used for web pages") HISTOGRAM(MEMORY_JS_GC_HEAP, 1024, 512 * 1024, 50, EXPONENTIAL, "Memory used by the garbage-collected JavaScript heap (KB)") HISTOGRAM(MEMORY_RESIDENT, 32 * 1024, 1024 * 1024, 50, EXPONENTIAL, "Resident memory size (KB)") HISTOGRAM(MEMORY_STORAGE_SQLITE, 1024, 512 * 1024, 50, EXPONENTIAL, "Memory used by SQLite (KB)") HISTOGRAM(MEMORY_IMAGES_CONTENT_USED_UNCOMPRESSED, 1024, 1024 * 1024, 50, EXPONENTIAL, "Memory used for uncompressed, in-use content images (KB)") HISTOGRAM(MEMORY_HEAP_ALLOCATED, 1024, 1024 * 1024, 50, EXPONENTIAL, "Heap memory allocated (KB)") HISTOGRAM(MEMORY_EXPLICIT, 1024, 1024 * 1024, 50, EXPONENTIAL, "Explicit memory allocations (KB)") #if defined(XP_MACOSX) HISTOGRAM(MEMORY_FREE_PURGED_PAGES_MS, 1, 1024, 10, EXPONENTIAL, "Time(ms) to purge MADV_FREE'd heap pages.") #endif #if defined(XP_WIN) HISTOGRAM(EARLY_GLUESTARTUP_READ_OPS, 1, 100, 12, LINEAR, "ProcessIoCounters.ReadOperationCount before glue startup") HISTOGRAM(EARLY_GLUESTARTUP_READ_TRANSFER, 1, 50 * 1024, 12, EXPONENTIAL, "ProcessIoCounters.ReadTransferCount before glue startup (KB)") HISTOGRAM(GLUESTARTUP_READ_OPS, 1, 100, 12, LINEAR, "ProcessIoCounters.ReadOperationCount after glue startup") HISTOGRAM(GLUESTARTUP_READ_TRANSFER, 1, 50 * 1024, 12, EXPONENTIAL, "ProcessIoCounters.ReadTransferCount after glue startup (KB)") #elif defined(XP_UNIX) HISTOGRAM(EARLY_GLUESTARTUP_HARD_FAULTS, 1, 100, 12, LINEAR, "Hard faults count before glue startup") HISTOGRAM(GLUESTARTUP_HARD_FAULTS, 1, 500, 12, EXPONENTIAL, "Hard faults count after glue startup") HISTOGRAM(PAGE_FAULTS_HARD, 8, 64 * 1024, 13, EXPONENTIAL, "Hard page faults (since last telemetry ping)") #endif HISTOGRAM(FONTLIST_INITOTHERFAMILYNAMES, 1, 30000, 50, EXPONENTIAL, "Time(ms) spent on reading other family names from all fonts") HISTOGRAM(FONTLIST_INITFACENAMELISTS, 1, 30000, 50, EXPONENTIAL, "Time(ms) spent on reading family names from all fonts") #if defined(XP_WIN) HISTOGRAM(DWRITEFONT_INITFONTLIST_TOTAL, 1, 30000, 10, EXPONENTIAL, "gfxDWriteFontList::InitFontList Total (ms)") HISTOGRAM(DWRITEFONT_INITFONTLIST_INIT, 1, 30000, 10, EXPONENTIAL, "gfxDWriteFontList::InitFontList init (ms)") HISTOGRAM(DWRITEFONT_INITFONTLIST_GDI, 1, 30000, 10, EXPONENTIAL, "gfxDWriteFontList::InitFontList GdiInterop object (ms)") HISTOGRAM(DWRITEFONT_DELAYEDINITFONTLIST_TOTAL, 1, 30000, 10, EXPONENTIAL, "gfxDWriteFontList::DelayedInitFontList Total (ms)") HISTOGRAM(DWRITEFONT_DELAYEDINITFONTLIST_COUNT, 1, 10000, 10, EXPONENTIAL, "gfxDWriteFontList::DelayedInitFontList Font Family Count") HISTOGRAM_BOOLEAN(DWRITEFONT_DELAYEDINITFONTLIST_GDI_TABLE, "gfxDWriteFontList::DelayedInitFontList GDI Table Access") HISTOGRAM(DWRITEFONT_DELAYEDINITFONTLIST_COLLECT, 1, 30000, 10, EXPONENTIAL, "gfxDWriteFontList::DelayedInitFontList GetSystemFontCollection (ms)") HISTOGRAM(DWRITEFONT_DELAYEDINITFONTLIST_ITERATE, 1, 30000, 10, EXPONENTIAL, "gfxDWriteFontList::DelayedInitFontList iterate over families (ms)") HISTOGRAM(GDI_INITFONTLIST_TOTAL, 1, 30000, 10, EXPONENTIAL, "gfxGDIFontList::InitFontList Total (ms)") #elif defined(XP_MACOSX) HISTOGRAM(MAC_INITFONTLIST_TOTAL, 1, 30000, 10, EXPONENTIAL, "gfxMacPlatformFontList::InitFontList Total (ms)") #endif HISTOGRAM(SYSTEM_FONT_FALLBACK, 1, 100000, 50, EXPONENTIAL, "System font fallback (us)") HISTOGRAM(SYSTEM_FONT_FALLBACK_FIRST, 1, 40000, 20, EXPONENTIAL, "System font fallback, first call (ms)") HISTOGRAM_BOOLEAN(SHUTDOWN_OK, "Did the browser start after a successful shutdown") HISTOGRAM(IMAGE_DECODE_LATENCY, 50, 5000000, 100, EXPONENTIAL, "Time spent decoding an image chunk (us)") HISTOGRAM(IMAGE_DECODE_TIME, 50, 50000000, 100, EXPONENTIAL, "Time spent decoding an image (us)") HISTOGRAM(IMAGE_DECODE_ON_DRAW_LATENCY, 50, 50000000, 100, EXPONENTIAL, "Time from starting a decode to it showing up on the screen (us)") HISTOGRAM(IMAGE_DECODE_CHUNKS, 1, 500, 50, EXPONENTIAL, "Number of chunks per decode attempt") HISTOGRAM(IMAGE_DECODE_COUNT, 1, 500, 50, EXPONENTIAL, "Decode count") HISTOGRAM(IMAGE_DECODE_SPEED_JPEG, 500, 50000000, 50, EXPONENTIAL, "JPEG image decode speed (Kbytes/sec)") HISTOGRAM(IMAGE_DECODE_SPEED_GIF, 500, 50000000, 50, EXPONENTIAL, "GIF image decode speed (Kbytes/sec)") HISTOGRAM(IMAGE_DECODE_SPEED_PNG, 500, 50000000, 50, EXPONENTIAL, "PNG image decode speed (Kbytes/sec)") HISTOGRAM_BOOLEAN(CANVAS_2D_USED, "2D canvas used") HISTOGRAM_BOOLEAN(CANVAS_WEBGL_USED, "WebGL canvas used") /** * Networking telemetry */ HISTOGRAM(TOTAL_CONTENT_PAGE_LOAD_TIME, 100, 30000, 100, EXPONENTIAL, "HTTP: Total page load time (ms)") HISTOGRAM(HTTP_SUBITEM_OPEN_LATENCY_TIME, 1, 30000, 50, EXPONENTIAL, "HTTP subitem: Page start -> subitem open() (ms)") HISTOGRAM(HTTP_SUBITEM_FIRST_BYTE_LATENCY_TIME, 1, 30000, 50, EXPONENTIAL, "HTTP subitem: Page start -> first byte received for subitem reply (ms)") HISTOGRAM(HTTP_REQUEST_PER_PAGE, 1, 1000, 50, EXPONENTIAL, "HTTP: Requests per page (count)") HISTOGRAM(HTTP_REQUEST_PER_PAGE_FROM_CACHE, 1, 101, 102, LINEAR, "HTTP: Requests serviced from cache (%)") #define _HTTP_HIST(name, label) \ HISTOGRAM(name, 1, 30000, 50, EXPONENTIAL, "HTTP " label) \ #define HTTP_HISTOGRAMS(prefix, labelprefix) \ _HTTP_HIST(HTTP_##prefix##_DNS_ISSUE_TIME, labelprefix "open() -> DNS request issued (ms)") \ _HTTP_HIST(HTTP_##prefix##_DNS_LOOKUP_TIME, labelprefix "DNS lookup time (ms)") \ _HTTP_HIST(HTTP_##prefix##_TCP_CONNECTION, labelprefix "TCP connection setup (ms)") \ _HTTP_HIST(HTTP_##prefix##_OPEN_TO_FIRST_SENT, labelprefix "Open -> first byte of request sent (ms)") \ _HTTP_HIST(HTTP_##prefix##_FIRST_SENT_TO_LAST_RECEIVED, labelprefix "First byte of request sent -> last byte of response received (ms)") \ _HTTP_HIST(HTTP_##prefix##_OPEN_TO_FIRST_RECEIVED, labelprefix "Open -> first byte of reply received (ms)") \ _HTTP_HIST(HTTP_##prefix##_OPEN_TO_FIRST_FROM_CACHE, labelprefix "Open -> cache read start (ms)") \ _HTTP_HIST(HTTP_##prefix##_CACHE_READ_TIME, labelprefix "Cache read time (ms)") \ _HTTP_HIST(HTTP_##prefix##_REVALIDATION, labelprefix "Positive cache validation time (ms)") \ _HTTP_HIST(HTTP_##prefix##_COMPLETE_LOAD, labelprefix "Overall load time - all (ms)") \ _HTTP_HIST(HTTP_##prefix##_COMPLETE_LOAD_CACHED, labelprefix "Overall load time - cache hits (ms)") \ _HTTP_HIST(HTTP_##prefix##_COMPLETE_LOAD_NET, labelprefix "Overall load time - network (ms)") \ HTTP_HISTOGRAMS(PAGE, "page: ") HTTP_HISTOGRAMS(SUB, "subitem: ") #undef _HTTP_HIST #undef HTTP_HISTOGRAMS HISTOGRAM(HTTP_CACHE_DISPOSITION, 1, 5, 5, LINEAR, "HTTP Cache Hit, Reval, Failed-Reval, Miss") HISTOGRAM(HTTP_DISK_CACHE_DISPOSITION, 1, 5, 5, LINEAR, "HTTP Disk Cache Hit, Reval, Failed-Reval, Miss") HISTOGRAM(HTTP_MEMORY_CACHE_DISPOSITION, 1, 5, 5, LINEAR, "HTTP Memory Cache Hit, Reval, Failed-Reval, Miss") HISTOGRAM(HTTP_OFFLINE_CACHE_DISPOSITION, 1, 5, 5, LINEAR, "HTTP Offline Cache Hit, Reval, Failed-Reval, Miss") HISTOGRAM(CACHE_DEVICE_SEARCH, 1, 100, 100, LINEAR, "Time to search cache (ms)") HISTOGRAM(CACHE_MEMORY_SEARCH, 1, 100, 100, LINEAR, "Time to search memory cache (ms)") HISTOGRAM(CACHE_DISK_SEARCH, 1, 100, 100, LINEAR, "Time to search disk cache (ms)") HISTOGRAM(CACHE_OFFLINE_SEARCH, 1, 100, 100, LINEAR, "Time to search offline cache (ms)") HISTOGRAM(HTTP_DISK_CACHE_OVERHEAD, 1, 32000000, 100, EXPONENTIAL, "HTTP Disk cache memory overhead (bytes)") HISTOGRAM(FIND_PLUGINS, 1, 3000, 10, EXPONENTIAL, "Time spent scanning filesystem for plugins (ms)") HISTOGRAM(CHECK_JAVA_ENABLED, 1, 3000, 10, EXPONENTIAL, "Time spent checking if Java is enabled (ms)") /* Define 2 histograms: MOZ_SQLITE_(NAME)_MS and * MOZ_SQLITE_(NAME)_MAIN_THREAD_MS. These are meant to be used by * IOThreadAutoTimer which relies on _MAIN_THREAD_MS histogram being * "+ 1" away from MOZ_SQLITE_(NAME)_MS. */ #define SQLITE_TIME_SPENT(NAME, DESC) \ HISTOGRAM(MOZ_SQLITE_ ## NAME ## _MS, 1, 3000, 10, EXPONENTIAL, DESC) \ HISTOGRAM(MOZ_SQLITE_ ## NAME ## _MAIN_THREAD_MS, 1, 3000, 10, EXPONENTIAL, DESC) #define SQLITE_TIME_PER_FILE(NAME, DESC) \ SQLITE_TIME_SPENT(OTHER_ ## NAME, DESC) \ SQLITE_TIME_SPENT(PLACES_ ## NAME, DESC) \ SQLITE_TIME_SPENT(COOKIES_ ## NAME, DESC) \ SQLITE_TIME_SPENT(URLCLASSIFIER_ ## NAME, DESC) \ SQLITE_TIME_SPENT(WEBAPPS_ ## NAME, DESC) SQLITE_TIME_SPENT(OPEN, "Time spent on SQLite open() (ms)") SQLITE_TIME_SPENT(TRUNCATE, "Time spent on SQLite truncate() (ms)") SQLITE_TIME_PER_FILE(READ, "Time spent on SQLite read() (ms)") SQLITE_TIME_PER_FILE(WRITE, "Time spent on SQLite write() (ms)") SQLITE_TIME_PER_FILE(SYNC, "Time spent on SQLite fsync() (ms)") #undef SQLITE_TIME_PER_FILE #undef SQLITE_TIME_SPENT HISTOGRAM(MOZ_SQLITE_OTHER_READ_B, 1, 32768, 3, LINEAR, "SQLite read() (bytes)") HISTOGRAM(MOZ_SQLITE_PLACES_READ_B, 1, 32768, 3, LINEAR, "SQLite read() (bytes)") HISTOGRAM(MOZ_SQLITE_COOKIES_READ_B, 1, 32768, 3, LINEAR, "SQLite read() (bytes)") HISTOGRAM(MOZ_SQLITE_URLCLASSIFIER_READ_B, 1, 32768, 3, LINEAR, "SQLite read() (bytes)") HISTOGRAM(MOZ_SQLITE_WEBAPPS_READ_B, 1, 32768, 3, LINEAR, "SQLite read() (bytes)") HISTOGRAM(MOZ_SQLITE_PLACES_WRITE_B, 1, 32768, 3, LINEAR, "SQLite write (bytes)") HISTOGRAM(MOZ_SQLITE_COOKIES_WRITE_B, 1, 32768, 3, LINEAR, "SQLite write (bytes)") HISTOGRAM(MOZ_SQLITE_URLCLASSIFIER_WRITE_B, 1, 32768, 3, LINEAR, "SQLite write (bytes)") HISTOGRAM(MOZ_SQLITE_WEBAPPS_WRITE_B, 1, 32768, 3, LINEAR, "SQLite write (bytes)") HISTOGRAM(MOZ_SQLITE_OTHER_WRITE_B, 1, 32768, 3, LINEAR, "SQLite write (bytes)") HISTOGRAM(MOZ_STORAGE_ASYNC_REQUESTS_MS, 1, 32768, 20, EXPONENTIAL, "mozStorage async requests completion (ms)") HISTOGRAM_BOOLEAN(MOZ_STORAGE_ASYNC_REQUESTS_SUCCESS, "mozStorage async requests success") HISTOGRAM(STARTUP_MEASUREMENT_ERRORS, 1, mozilla::StartupTimeline::MAX_EVENT_ID, mozilla::StartupTimeline::MAX_EVENT_ID + 1, LINEAR, "Flags errors in startup calculation()") HISTOGRAM(NETWORK_DISK_CACHE_OPEN, 1, 10000, 10, EXPONENTIAL, "Time spent opening disk cache (ms)") HISTOGRAM(NETWORK_DISK_CACHE_TRASHRENAME, 1, 10000, 10, EXPONENTIAL, "Time spent renaming bad Cache to Cache.Trash (ms)") HISTOGRAM(NETWORK_DISK_CACHE_DELETEDIR, 1, 10000, 10, EXPONENTIAL, "Time spent deleting disk cache (ms)") /** * Url-Classifier telemetry */ #ifdef MOZ_URL_CLASSIFIER HISTOGRAM(URLCLASSIFIER_PS_FILELOAD_TIME, 1, 1000, 10, EXPONENTIAL, "Time spent loading PrefixSet from file (ms)") HISTOGRAM(URLCLASSIFIER_PS_FALLOCATE_TIME, 1, 1000, 10, EXPONENTIAL, "Time spent fallocating PrefixSet (ms)") HISTOGRAM(URLCLASSIFIER_PS_CONSTRUCT_TIME, 1, 5000, 15, EXPONENTIAL, "Time spent constructing PrefixSet from DB (ms)") HISTOGRAM(URLCLASSIFIER_PS_LOOKUP_TIME, 1, 500, 10, EXPONENTIAL, "Time spent per PrefixSet lookup (ms)") #endif /** * Places telemetry. */ HISTOGRAM(PLACES_PAGES_COUNT, 1000, 150000, 20, EXPONENTIAL, "PLACES: Number of unique pages") HISTOGRAM(PLACES_BOOKMARKS_COUNT, 100, 8000, 15, EXPONENTIAL, "PLACES: Number of bookmarks") HISTOGRAM(PLACES_TAGS_COUNT, 1, 200, 10, EXPONENTIAL, "PLACES: Number of tags") HISTOGRAM(PLACES_FOLDERS_COUNT, 1, 200, 10, EXPONENTIAL, "PLACES: Number of folders") HISTOGRAM(PLACES_KEYWORDS_COUNT, 1, 200, 10, EXPONENTIAL, "PLACES: Number of keywords") HISTOGRAM(PLACES_SORTED_BOOKMARKS_PERC, 1, 100, 10, LINEAR, "PLACES: Percentage of bookmarks organized in folders") HISTOGRAM(PLACES_TAGGED_BOOKMARKS_PERC, 1, 100, 10, LINEAR, "PLACES: Percentage of tagged bookmarks") HISTOGRAM(PLACES_DATABASE_FILESIZE_MB, 5, 200, 10, EXPONENTIAL, "PLACES: Database filesize (MB)") HISTOGRAM(PLACES_DATABASE_JOURNALSIZE_MB, 1, 50, 10, EXPONENTIAL, "PLACES: Database journal size (MB)") HISTOGRAM(PLACES_DATABASE_PAGESIZE_B, 1024, 32768, 10, EXPONENTIAL, "PLACES: Database page size (bytes)") HISTOGRAM(PLACES_DATABASE_SIZE_PER_PAGE_B, 500, 10240, 20, EXPONENTIAL, "PLACES: Average size of a place in the database (bytes)") HISTOGRAM(PLACES_EXPIRATION_STEPS_TO_CLEAN, 1, 10, 10, LINEAR, "PLACES: Expiration steps to cleanup the database") HISTOGRAM(PLACES_AUTOCOMPLETE_1ST_RESULT_TIME_MS, 50, 500, 10, EXPONENTIAL, "PLACES: Time for first autocomplete result if > 50ms (ms)") /** * Thunderbird-specific telemetry. */ #ifdef MOZ_THUNDERBIRD HISTOGRAM(THUNDERBIRD_GLODA_SIZE_MB, 1, 1000, 40, LINEAR, "Gloda: size of global-messages-db.sqlite (MB)") HISTOGRAM(THUNDERBIRD_CONVERSATIONS_TIME_TO_2ND_GLODA_QUERY_MS, 1, 10000, 30, EXPONENTIAL, "Conversations: time between the moment we click and the second gloda query returns (ms)") HISTOGRAM(THUNDERBIRD_INDEXING_RATE_MSG_PER_S, 1, 100, 20, LINEAR, "Gloda: indexing rate (message/s)") #endif HISTOGRAM_BOOLEAN(INNERWINDOWS_WITH_MUTATION_LISTENERS, "Deleted or to-be-reused innerwindow which has had mutation event listeners.") HISTOGRAM(XUL_REFLOW_MS, 1, 3000, 10, EXPONENTIAL, "xul reflows") HISTOGRAM(XUL_INITIAL_FRAME_CONSTRUCTION, 1, 3000, 10, EXPONENTIAL, "initial xul frame construction") HISTOGRAM_BOOLEAN(XMLHTTPREQUEST_ASYNC_OR_SYNC, "Type of XMLHttpRequest, async or sync") #undef HISTOGRAM_BOOLEAN