1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/worker_host/worker_service.h"
#include "base/command_line.h"
#include "base/singleton.h"
#include "base/sys_info.h"
#include "base/thread.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/plugin_service.h"
#include "chrome/browser/worker_host/worker_process_host.h"
#include "chrome/browser/renderer_host/render_process_host.h"
#include "chrome/browser/renderer_host/resource_message_filter.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/notification_service.h"
#include "net/base/registry_controlled_domain.h"
namespace {
static const int kMaxWorkerProcesses = 10;
}
WorkerService* WorkerService::GetInstance() {
return Singleton<WorkerService>::get();
}
WorkerService::WorkerService() : next_worker_route_id_(0) {
// Receive a notification if the message filter is deleted.
NotificationService::current()->AddObserver(
this,
NotificationType::RESOURCE_MESSAGE_FILTER_SHUTDOWN,
NotificationService::AllSources());
}
WorkerService::~WorkerService() {
}
bool WorkerService::CreateDedicatedWorker(const GURL &url,
int render_view_route_id,
ResourceMessageFilter* filter,
int renderer_route_id) {
WorkerProcessHost* worker = NULL;
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kWebWorkerProcessPerCore)) {
worker = GetProcessToFillUpCores();
} else {
worker = GetProcessForDomain(url);
}
if (!worker) {
worker = new WorkerProcessHost(filter->resource_dispatcher_host());
if (!worker->Init()) {
delete worker;
return false;
}
}
// Generate a unique route id for the browser-worker communication that's
// unique among all worker processes. That way when the worker process sends
// a wrapped IPC message through us, we know which WorkerProcessHost to give
// it to.
worker->CreateWorker(url, render_view_route_id, ++next_worker_route_id_,
renderer_route_id, filter);
return true;
}
void WorkerService::ForwardMessage(const IPC::Message& message) {
for (ChildProcessHost::Iterator iter(ChildProcessInfo::WORKER_PROCESS);
!iter.Done(); ++iter) {
WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
if (worker->FilterMessage(message))
return;
}
// TODO(jabdelmalek): tell sender that callee is gone
}
WorkerProcessHost* WorkerService::GetProcessForDomain(const GURL& url) {
int num_processes = 0;
std::string domain =
net::RegistryControlledDomainService::GetDomainAndRegistry(url);
for (ChildProcessHost::Iterator iter(ChildProcessInfo::WORKER_PROCESS);
!iter.Done(); ++iter) {
num_processes++;
WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
for (WorkerProcessHost::Instances::const_iterator instance =
worker->instances().begin();
instance != worker->instances().end(); ++instance) {
if (net::RegistryControlledDomainService::GetDomainAndRegistry(
instance->url) == domain) {
return worker;
}
}
}
if (num_processes >= kMaxWorkerProcesses)
return GetLeastLoadedWorker();
return NULL;
}
WorkerProcessHost* WorkerService::GetProcessToFillUpCores() {
int num_processes = 0;
ChildProcessHost::Iterator iter(ChildProcessInfo::WORKER_PROCESS);
for (; !iter.Done(); ++iter)
num_processes++;
if (num_processes >= base::SysInfo::NumberOfProcessors())
return GetLeastLoadedWorker();
return NULL;
}
WorkerProcessHost* WorkerService::GetLeastLoadedWorker() {
WorkerProcessHost* smallest = NULL;
for (ChildProcessHost::Iterator iter(ChildProcessInfo::WORKER_PROCESS);
!iter.Done(); ++iter) {
WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
if (!smallest || worker->instances().size() < smallest->instances().size())
smallest = worker;
}
return smallest;
}
void WorkerService::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK(type.value == NotificationType::RESOURCE_MESSAGE_FILTER_SHUTDOWN);
ResourceMessageFilter* filter = Source<ResourceMessageFilter>(source).ptr();
for (ChildProcessHost::Iterator iter(ChildProcessInfo::WORKER_PROCESS);
!iter.Done(); ++iter) {
WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
worker->RendererShutdown(filter);
}
}
|
