chrome/browser/memory_details.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/memory_details.h"
   6
   7 #include "base/bind.h"
   8 #include "base/file_version_info.h"
   9 #include "base/metrics/histogram.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/stringprintf.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "chrome/browser/extensions/extension_service.h"
  14 #include "chrome/browser/profiles/profile.h"
  15 #include "chrome/common/url_constants.h"
  16 #include "components/nacl/common/nacl_process_type.h"
  17 #include "content/public/browser/browser_child_process_host_iterator.h"
  18 #include "content/public/browser/browser_thread.h"
  19 #include "content/public/browser/child_process_data.h"
  20 #include "content/public/browser/navigation_controller.h"
  21 #include "content/public/browser/navigation_entry.h"
  22 #include "content/public/browser/render_process_host.h"
  23 #include "content/public/browser/render_view_host.h"
  24 #include "content/public/browser/render_widget_host_iterator.h"
  25 #include "content/public/browser/web_contents.h"
  26 #include "content/public/common/bindings_policy.h"
  27 #include "extensions/browser/process_manager.h"
  28 #include "extensions/browser/process_map.h"
  29 #include "extensions/browser/view_type_utils.h"
  30 #include "extensions/common/extension.h"
  31 #include "grit/chromium_strings.h"
  32 #include "grit/generated_resources.h"
  33 #include "ui/base/l10n/l10n_util.h"
  34
  35 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
  36 #include "content/public/browser/zygote_host_linux.h"
  37 #endif
  38
  39 using base::StringPrintf;
  40 using content::BrowserChildProcessHostIterator;
  41 using content::BrowserThread;
  42 using content::NavigationEntry;
  43 using content::RenderViewHost;
  44 using content::RenderWidgetHost;
  45 using content::WebContents;
  46 using extensions::Extension;
  47
  48 // static
  49 std::string ProcessMemoryInformation::GetRendererTypeNameInEnglish(
  50     RendererProcessType type) {
  51   switch (type) {
  52     case RENDERER_NORMAL:
  53       return "Tab";
  54     case RENDERER_CHROME:
  55       return "Tab (Chrome)";
  56     case RENDERER_EXTENSION:
  57       return "Extension";
  58     case RENDERER_DEVTOOLS:
  59       return "Devtools";
  60     case RENDERER_INTERSTITIAL:
  61       return "Interstitial";
  62     case RENDERER_BACKGROUND_APP:
  63       return "Background App";
  64     case RENDERER_UNKNOWN:
  65     default:
  66       NOTREACHED() << "Unknown renderer process type!";
  67       return "Unknown";
  68   }
  69 }
  70
  71 // static
  72 std::string ProcessMemoryInformation::GetFullTypeNameInEnglish(
  73     int process_type,
  74     RendererProcessType rtype) {
  75   if (process_type == content::PROCESS_TYPE_RENDERER)
  76     return GetRendererTypeNameInEnglish(rtype);
  77   return content::GetProcessTypeNameInEnglish(process_type);
  78 }
  79
  80 ProcessMemoryInformation::ProcessMemoryInformation()
  81     : pid(0),
  82       num_processes(0),
  83       is_diagnostics(false),
  84       process_type(content::PROCESS_TYPE_UNKNOWN),
  85       renderer_type(RENDERER_UNKNOWN) {
  86 }
  87
  88 ProcessMemoryInformation::~ProcessMemoryInformation() {}
  89
  90 bool ProcessMemoryInformation::operator<(
  91     const ProcessMemoryInformation& rhs) const {
  92   return working_set.priv < rhs.working_set.priv;
  93 }
  94
  95 ProcessData::ProcessData() {}
  96
  97 ProcessData::ProcessData(const ProcessData& rhs)
  98     : name(rhs.name),
  99       process_name(rhs.process_name),
 100       processes(rhs.processes) {
 101 }
 102
 103 ProcessData::~ProcessData() {}
 104
 105 ProcessData& ProcessData::operator=(const ProcessData& rhs) {
 106   name = rhs.name;
 107   process_name = rhs.process_name;
 108   processes = rhs.processes;
 109   return *this;
 110 }
 111
 112 // About threading:
 113 //
 114 // This operation will hit no fewer than 3 threads.
 115 //
 116 // The BrowserChildProcessHostIterator can only be accessed from the IO thread.
 117 //
 118 // The RenderProcessHostIterator can only be accessed from the UI thread.
 119 //
 120 // This operation can take 30-100ms to complete.  We never want to have
 121 // one task run for that long on the UI or IO threads.  So, we run the
 122 // expensive parts of this operation over on the file thread.
 123 //
 124 void MemoryDetails::StartFetch(UserMetricsMode user_metrics_mode) {
 125   // This might get called from the UI or FILE threads, but should not be
 126   // getting called from the IO thread.
 127   DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
 128   user_metrics_mode_ = user_metrics_mode;
 129
 130   // In order to process this request, we need to use the plugin information.
 131   // However, plugin process information is only available from the IO thread.
 132   BrowserThread::PostTask(
 133       BrowserThread::IO, FROM_HERE,
 134       base::Bind(&MemoryDetails::CollectChildInfoOnIOThread, this));
 135 }
 136
 137 MemoryDetails::~MemoryDetails() {}
 138
 139 std::string MemoryDetails::ToLogString() {
 140   std::string log;
 141   log.reserve(4096);
 142   ProcessMemoryInformationList processes = ChromeBrowser()->processes;
 143   // Sort by memory consumption, low to high.
 144   std::sort(processes.begin(), processes.end());
 145   // Print from high to low.
 146   for (ProcessMemoryInformationList::reverse_iterator iter1 =
 147           processes.rbegin();
 148        iter1 != processes.rend();
 149        ++iter1) {
 150     log += ProcessMemoryInformation::GetFullTypeNameInEnglish(
 151             iter1->process_type, iter1->renderer_type);
 152     if (!iter1->titles.empty()) {
 153       log += " [";
 154       for (std::vector<base::string16>::const_iterator iter2 =
 155                iter1->titles.begin();
 156            iter2 != iter1->titles.end(); ++iter2) {
 157         if (iter2 != iter1->titles.begin())
 158           log += "|";
 159         log += base::UTF16ToUTF8(*iter2);
 160       }
 161       log += "]";
 162     }
 163     log += StringPrintf(" %d MB private, %d MB shared",
 164                         static_cast<int>(iter1->working_set.priv) / 1024,
 165                         static_cast<int>(iter1->working_set.shared) / 1024);
 166 #if defined(OS_CHROMEOS)
 167     log += StringPrintf(", %d MB swapped",
 168                         static_cast<int>(iter1->working_set.swapped) / 1024);
 169 #endif
 170     log += "\n";
 171   }
 172   return log;
 173 }
 174
 175 void MemoryDetails::CollectChildInfoOnIOThread() {
 176   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 177
 178   std::vector<ProcessMemoryInformation> child_info;
 179
 180   // Collect the list of child processes. A 0 |handle| means that
 181   // the process is being launched, so we skip it.
 182   for (BrowserChildProcessHostIterator iter; !iter.Done(); ++iter) {
 183     ProcessMemoryInformation info;
 184     if (!iter.GetData().handle)
 185       continue;
 186     info.pid = base::GetProcId(iter.GetData().handle);
 187     if (!info.pid)
 188       continue;
 189
 190     info.process_type = iter.GetData().process_type;
 191     info.renderer_type = ProcessMemoryInformation::RENDERER_UNKNOWN;
 192     info.titles.push_back(iter.GetData().name);
 193     child_info.push_back(info);
 194   }
 195
 196   // Now go do expensive memory lookups from the file thread.
 197   BrowserThread::PostTask(
 198       BrowserThread::FILE, FROM_HERE,
 199       base::Bind(&MemoryDetails::CollectProcessData, this, child_info));
 200 }
 201
 202 void MemoryDetails::CollectChildInfoOnUIThread() {
 203   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 204
 205 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 206   const pid_t zygote_pid = content::ZygoteHost::GetInstance()->GetPid();
 207 #endif
 208
 209   ProcessData* const chrome_browser = ChromeBrowser();
 210   // Get more information about the process.
 211   for (size_t index = 0; index < chrome_browser->processes.size();
 212       index++) {
 213     // Check if it's a renderer, if so get the list of page titles in it and
 214     // check if it's a diagnostics-related process.  We skip about:memory pages.
 215     // Iterate the RenderProcessHosts to find the tab contents.
 216     ProcessMemoryInformation& process =
 217         chrome_browser->processes[index];
 218
 219     scoped_ptr<content::RenderWidgetHostIterator> widgets(
 220         RenderWidgetHost::GetRenderWidgetHosts());
 221     while (content::RenderWidgetHost* widget = widgets->GetNextHost()) {
 222       content::RenderProcessHost* render_process_host =
 223           widget->GetProcess();
 224       DCHECK(render_process_host);
 225       // Ignore processes that don't have a connection, such as crashed tabs.
 226       if (!render_process_host->HasConnection() ||
 227           process.pid != base::GetProcId(render_process_host->GetHandle())) {
 228         continue;
 229       }
 230       process.process_type = content::PROCESS_TYPE_RENDERER;
 231       Profile* profile =
 232           Profile::FromBrowserContext(
 233               render_process_host->GetBrowserContext());
 234       ExtensionService* extension_service = profile->GetExtensionService();
 235       extensions::ProcessMap* extension_process_map = NULL;
 236       // No extensions on Android. So extension_service can be NULL.
 237       if (extension_service)
 238           extension_process_map = extensions::ProcessMap::Get(profile);
 239
 240       // The RenderProcessHost may host multiple WebContentses.  Any
 241       // of them which contain diagnostics information make the whole
 242       // process be considered a diagnostics process.
 243       if (!widget->IsRenderView())
 244         continue;
 245
 246       RenderViewHost* host = RenderViewHost::From(widget);
 247       WebContents* contents = WebContents::FromRenderViewHost(host);
 248       GURL url;
 249       if (contents) {
 250         url = contents->GetURL();
 251         SiteData* site_data =
 252             &chrome_browser->site_data[contents->GetBrowserContext()];
 253         SiteDetails::CollectSiteInfo(contents, site_data);
 254       }
 255       extensions::ViewType type = extensions::GetViewType(contents);
 256       if (host->GetEnabledBindings() & content::BINDINGS_POLICY_WEB_UI) {
 257         process.renderer_type = ProcessMemoryInformation::RENDERER_CHROME;
 258       } else if (extension_process_map &&
 259                  extension_process_map->Contains(host->GetProcess()->GetID())) {
 260         // For our purposes, don't count processes containing only hosted apps
 261         // as extension processes. See also: crbug.com/102533.
 262         std::set<std::string> extension_ids =
 263             extension_process_map->GetExtensionsInProcess(
 264             host->GetProcess()->GetID());
 265         for (std::set<std::string>::iterator iter = extension_ids.begin();
 266              iter != extension_ids.end(); ++iter) {
 267           const Extension* extension =
 268               extension_service->GetExtensionById(*iter, false);
 269           if (extension && !extension->is_hosted_app()) {
 270             process.renderer_type =
 271                 ProcessMemoryInformation::RENDERER_EXTENSION;
 272             break;
 273           }
 274         }
 275       }
 276       if (extension_process_map &&
 277           extension_process_map->Contains(host->GetProcess()->GetID())) {
 278         const Extension* extension =
 279             extension_service->extensions()->GetByID(url.host());
 280         if (extension) {
 281           base::string16 title = base::UTF8ToUTF16(extension->name());
 282           process.titles.push_back(title);
 283           process.renderer_type =
 284               ProcessMemoryInformation::RENDERER_EXTENSION;
 285           continue;
 286         }
 287       }
 288
 289       if (!contents) {
 290         process.renderer_type =
 291             ProcessMemoryInformation::RENDERER_INTERSTITIAL;
 292         continue;
 293       }
 294
 295       if (type == extensions::VIEW_TYPE_BACKGROUND_CONTENTS) {
 296         process.titles.push_back(base::UTF8ToUTF16(url.spec()));
 297         process.renderer_type =
 298             ProcessMemoryInformation::RENDERER_BACKGROUND_APP;
 299         continue;
 300       }
 301
 302       // Since we have a WebContents and and the renderer type hasn't been
 303       // set yet, it must be a normal tabbed renderer.
 304       if (process.renderer_type == ProcessMemoryInformation::RENDERER_UNKNOWN)
 305         process.renderer_type = ProcessMemoryInformation::RENDERER_NORMAL;
 306
 307       base::string16 title = contents->GetTitle();
 308       if (!title.length())
 309         title = l10n_util::GetStringUTF16(IDS_DEFAULT_TAB_TITLE);
 310       process.titles.push_back(title);
 311
 312       // We need to check the pending entry as well as the virtual_url to
 313       // see if it's a chrome://memory URL (we don't want to count these in
 314       // the total memory usage of the browser).
 315       //
 316       // When we reach here, chrome://memory will be the pending entry since
 317       // we haven't responded with any data such that it would be committed.
 318       // If you have another chrome://memory tab open (which would be
 319       // committed), we don't want to count it either, so we also check the
 320       // last committed entry.
 321       //
 322       // Either the pending or last committed entries can be NULL.
 323       const NavigationEntry* pending_entry =
 324           contents->GetController().GetPendingEntry();
 325       const NavigationEntry* last_committed_entry =
 326           contents->GetController().GetLastCommittedEntry();
 327       if ((last_committed_entry &&
 328            LowerCaseEqualsASCII(last_committed_entry->GetVirtualURL().spec(),
 329                                 chrome::kChromeUIMemoryURL)) ||
 330           (pending_entry &&
 331            LowerCaseEqualsASCII(pending_entry->GetVirtualURL().spec(),
 332                                 chrome::kChromeUIMemoryURL))) {
 333         process.is_diagnostics = true;
 334       }
 335     }
 336
 337 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 338     if (process.pid == zygote_pid) {
 339       process.process_type = content::PROCESS_TYPE_ZYGOTE;
 340     }
 341 #endif
 342   }
 343
 344   // Get rid of other Chrome processes that are from a different profile.
 345   for (size_t index = 0; index < chrome_browser->processes.size();
 346       index++) {
 347     if (chrome_browser->processes[index].process_type ==
 348         content::PROCESS_TYPE_UNKNOWN) {
 349       chrome_browser->processes.erase(
 350           chrome_browser->processes.begin() + index);
 351       index--;
 352     }
 353   }
 354
 355   if (user_metrics_mode_ == UPDATE_USER_METRICS)
 356     UpdateHistograms();
 357
 358   OnDetailsAvailable();
 359 }
 360
 361 void MemoryDetails::UpdateHistograms() {
 362   // Reports a set of memory metrics to UMA.
 363   // Memory is measured in KB.
 364
 365   const ProcessData& browser = *ChromeBrowser();
 366   size_t aggregate_memory = 0;
 367   int chrome_count = 0;
 368   int extension_count = 0;
 369   int plugin_count = 0;
 370   int pepper_plugin_count = 0;
 371   int pepper_plugin_broker_count = 0;
 372   int renderer_count = 0;
 373   int other_count = 0;
 374   int worker_count = 0;
 375   int process_limit = content::RenderProcessHost::GetMaxRendererProcessCount();
 376   for (size_t index = 0; index < browser.processes.size(); index++) {
 377     int sample = static_cast<int>(browser.processes[index].working_set.priv);
 378     aggregate_memory += sample;
 379     switch (browser.processes[index].process_type) {
 380       case content::PROCESS_TYPE_BROWSER:
 381         UMA_HISTOGRAM_MEMORY_KB("Memory.Browser", sample);
 382         continue;
 383       case content::PROCESS_TYPE_RENDERER: {
 384         ProcessMemoryInformation::RendererProcessType renderer_type =
 385             browser.processes[index].renderer_type;
 386         switch (renderer_type) {
 387           case ProcessMemoryInformation::RENDERER_EXTENSION:
 388             UMA_HISTOGRAM_MEMORY_KB("Memory.Extension", sample);
 389             extension_count++;
 390             continue;
 391           case ProcessMemoryInformation::RENDERER_CHROME:
 392             UMA_HISTOGRAM_MEMORY_KB("Memory.Chrome", sample);
 393             chrome_count++;
 394             continue;
 395           case ProcessMemoryInformation::RENDERER_UNKNOWN:
 396             NOTREACHED() << "Unknown renderer process type.";
 397             continue;
 398           case ProcessMemoryInformation::RENDERER_NORMAL:
 399           default:
 400             // TODO(erikkay): Should we bother splitting out the other subtypes?
 401             UMA_HISTOGRAM_MEMORY_KB("Memory.Renderer", sample);
 402             renderer_count++;
 403             continue;
 404         }
 405       }
 406       case content::PROCESS_TYPE_PLUGIN:
 407         UMA_HISTOGRAM_MEMORY_KB("Memory.Plugin", sample);
 408         plugin_count++;
 409         continue;
 410       case content::PROCESS_TYPE_WORKER:
 411         UMA_HISTOGRAM_MEMORY_KB("Memory.Worker", sample);
 412         worker_count++;
 413         continue;
 414       case content::PROCESS_TYPE_UTILITY:
 415         UMA_HISTOGRAM_MEMORY_KB("Memory.Utility", sample);
 416         other_count++;
 417         continue;
 418       case content::PROCESS_TYPE_ZYGOTE:
 419         UMA_HISTOGRAM_MEMORY_KB("Memory.Zygote", sample);
 420         other_count++;
 421         continue;
 422       case content::PROCESS_TYPE_SANDBOX_HELPER:
 423         UMA_HISTOGRAM_MEMORY_KB("Memory.SandboxHelper", sample);
 424         other_count++;
 425         continue;
 426       case content::PROCESS_TYPE_GPU:
 427         UMA_HISTOGRAM_MEMORY_KB("Memory.Gpu", sample);
 428         other_count++;
 429         continue;
 430       case content::PROCESS_TYPE_PPAPI_PLUGIN:
 431         UMA_HISTOGRAM_MEMORY_KB("Memory.PepperPlugin", sample);
 432         pepper_plugin_count++;
 433         continue;
 434       case content::PROCESS_TYPE_PPAPI_BROKER:
 435         UMA_HISTOGRAM_MEMORY_KB("Memory.PepperPluginBroker", sample);
 436         pepper_plugin_broker_count++;
 437         continue;
 438       case PROCESS_TYPE_NACL_LOADER:
 439         UMA_HISTOGRAM_MEMORY_KB("Memory.NativeClient", sample);
 440         other_count++;
 441         continue;
 442       case PROCESS_TYPE_NACL_BROKER:
 443         UMA_HISTOGRAM_MEMORY_KB("Memory.NativeClientBroker", sample);
 444         other_count++;
 445         continue;
 446       default:
 447         NOTREACHED();
 448         continue;
 449     }
 450   }
 451 #if defined(OS_CHROMEOS)
 452   // Chrome OS exposes system-wide graphics driver memory which has historically
 453   // been a source of leak/bloat.
 454   base::SystemMemoryInfoKB meminfo;
 455   if (base::GetSystemMemoryInfo(&meminfo) && meminfo.gem_size != -1)
 456     UMA_HISTOGRAM_MEMORY_MB("Memory.Graphics", meminfo.gem_size / 1024 / 1024);
 457 #endif
 458
 459   UMA_HISTOGRAM_COUNTS_100("Memory.ProcessLimit", process_limit);
 460   UMA_HISTOGRAM_COUNTS_100("Memory.ProcessCount",
 461       static_cast<int>(browser.processes.size()));
 462   UMA_HISTOGRAM_COUNTS_100("Memory.ChromeProcessCount", chrome_count);
 463   UMA_HISTOGRAM_COUNTS_100("Memory.ExtensionProcessCount", extension_count);
 464   UMA_HISTOGRAM_COUNTS_100("Memory.OtherProcessCount", other_count);
 465   UMA_HISTOGRAM_COUNTS_100("Memory.PluginProcessCount", plugin_count);
 466   UMA_HISTOGRAM_COUNTS_100("Memory.PepperPluginProcessCount",
 467       pepper_plugin_count);
 468   UMA_HISTOGRAM_COUNTS_100("Memory.PepperPluginBrokerProcessCount",
 469       pepper_plugin_broker_count);
 470   UMA_HISTOGRAM_COUNTS_100("Memory.RendererProcessCount", renderer_count);
 471   UMA_HISTOGRAM_COUNTS_100("Memory.WorkerProcessCount", worker_count);
 472   // TODO(viettrungluu): Do we want separate counts for the other
 473   // (platform-specific) process types?
 474
 475   int total_sample = static_cast<int>(aggregate_memory / 1000);
 476   UMA_HISTOGRAM_MEMORY_MB("Memory.Total", total_sample);
 477
 478 #if defined(OS_CHROMEOS)
 479   UpdateSwapHistograms();
 480 #endif
 481
 482 }
 483
 484 #if defined(OS_CHROMEOS)
 485 void MemoryDetails::UpdateSwapHistograms() {
 486   UMA_HISTOGRAM_BOOLEAN("Memory.Swap.HaveSwapped", swap_info_.num_writes > 0);
 487   if (swap_info_.num_writes == 0)
 488     return;
 489
 490   // Only record swap info when any swaps have happened, to give us more
 491   // detail in the histograms.
 492   const ProcessData& browser = *ChromeBrowser();
 493   size_t aggregate_memory = 0;
 494   for (size_t index = 0; index < browser.processes.size(); index++) {
 495     int sample = static_cast<int>(browser.processes[index].working_set.swapped);
 496     aggregate_memory += sample;
 497     switch (browser.processes[index].process_type) {
 498       case content::PROCESS_TYPE_BROWSER:
 499         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Browser", sample);
 500         continue;
 501       case content::PROCESS_TYPE_RENDERER: {
 502         ProcessMemoryInformation::RendererProcessType renderer_type =
 503             browser.processes[index].renderer_type;
 504         switch (renderer_type) {
 505           case ProcessMemoryInformation::RENDERER_EXTENSION:
 506             UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Extension", sample);
 507             continue;
 508           case ProcessMemoryInformation::RENDERER_CHROME:
 509             UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Chrome", sample);
 510             continue;
 511           case ProcessMemoryInformation::RENDERER_UNKNOWN:
 512             NOTREACHED() << "Unknown renderer process type.";
 513             continue;
 514           case ProcessMemoryInformation::RENDERER_NORMAL:
 515           default:
 516             UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Renderer", sample);
 517             continue;
 518         }
 519       }
 520       case content::PROCESS_TYPE_PLUGIN:
 521         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Plugin", sample);
 522         continue;
 523       case content::PROCESS_TYPE_WORKER:
 524         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Worker", sample);
 525         continue;
 526       case content::PROCESS_TYPE_UTILITY:
 527         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Utility", sample);
 528         continue;
 529       case content::PROCESS_TYPE_ZYGOTE:
 530         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Zygote", sample);
 531         continue;
 532       case content::PROCESS_TYPE_SANDBOX_HELPER:
 533         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.SandboxHelper", sample);
 534         continue;
 535       case content::PROCESS_TYPE_GPU:
 536         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.Gpu", sample);
 537         continue;
 538       case content::PROCESS_TYPE_PPAPI_PLUGIN:
 539         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.PepperPlugin", sample);
 540         continue;
 541       case content::PROCESS_TYPE_PPAPI_BROKER:
 542         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.PepperPluginBroker", sample);
 543         continue;
 544       case PROCESS_TYPE_NACL_LOADER:
 545         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.NativeClient", sample);
 546         continue;
 547       case PROCESS_TYPE_NACL_BROKER:
 548         UMA_HISTOGRAM_MEMORY_KB("Memory.Swap.NativeClientBroker", sample);
 549         continue;
 550       default:
 551         NOTREACHED();
 552         continue;
 553     }
 554   }
 555
 556   int total_sample = static_cast<int>(aggregate_memory / 1000);
 557   UMA_HISTOGRAM_MEMORY_MB("Memory.Swap.Total", total_sample);
 558
 559   UMA_HISTOGRAM_CUSTOM_COUNTS("Memory.Swap.CompressedDataSize",
 560                               swap_info_.compr_data_size / (1024 * 1024),
 561                               1, 4096, 50);
 562   UMA_HISTOGRAM_CUSTOM_COUNTS("Memory.Swap.OriginalDataSize",
 563                               swap_info_.orig_data_size / (1024 * 1024),
 564                               1, 4096, 50);
 565   UMA_HISTOGRAM_CUSTOM_COUNTS("Memory.Swap.MemUsedTotal",
 566                               swap_info_.mem_used_total / (1024 * 1024),
 567                               1, 4096, 50);
 568   UMA_HISTOGRAM_CUSTOM_COUNTS("Memory.Swap.NumReads",
 569                               swap_info_.num_reads,
 570                               1, 100000000, 100);
 571   UMA_HISTOGRAM_CUSTOM_COUNTS("Memory.Swap.NumWrites",
 572                               swap_info_.num_writes,
 573                               1, 100000000, 100);
 574
 575   if (swap_info_.orig_data_size > 0 && swap_info_.compr_data_size > 0) {
 576     UMA_HISTOGRAM_CUSTOM_COUNTS(
 577         "Memory.Swap.CompressionRatio",
 578         swap_info_.orig_data_size / swap_info_.compr_data_size,
 579         1, 20, 20);
 580   }
 581 }
 582
 583 #endif