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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/renderer_host/render_process_host.h" | 5 #include "chrome/browser/renderer_host/render_process_host.h" |
6 | 6 |
7 #include "base/rand_util.h" | 7 #include "base/rand_util.h" |
8 #include "base/sys_info.h" | 8 #include "base/sys_info.h" |
9 #include "chrome/common/chrome_constants.h" | 9 #include "chrome/common/chrome_constants.h" |
10 #include "chrome/common/notification_service.h" | 10 #include "chrome/common/notification_service.h" |
11 | 11 |
12 namespace { | 12 namespace { |
13 | 13 |
14 unsigned int GetMaxRendererProcessCount() { | 14 unsigned int GetMaxRendererProcessCount() { |
15 // Defines the maximum number of renderer processes according to the | 15 // Defines the maximum number of renderer processes according to the |
16 // amount of installed memory as reported by the OS. The table | 16 // amount of installed memory as reported by the OS. The table |
17 // values are calculated by assuming that you want the renderers to | 17 // values are calculated by assuming that you want the renderers to |
18 // use half of the installed ram and assuming that each tab uses | 18 // use half of the installed ram and assuming that each tab uses |
19 // ~25MB. | 19 // ~40MB, however the curve is not linear but piecewise linear with |
20 // interleaved slopes of 3 and 2. | |
21 // If you modify this table you need to adjust browser\browser_uitest.cc | |
22 // to match the expected number of processes. | |
23 | |
20 static const int kMaxRenderersByRamTier[] = { | 24 static const int kMaxRenderersByRamTier[] = { |
21 4, // less than 256MB | 25 3, // less than 256MB |
22 8, // 256MB | 26 6, // 256MB |
23 12, // 512MB | 27 9, // 512MB |
24 16, // 768MB | 28 12, // 768MB |
29 14, // 1024MB | |
30 18, // 1280MB | |
31 20, // 1536MB | |
32 22, // 1792MB | |
33 24, // 2048MB | |
34 26, // 2304MB | |
35 29, // 2560MB | |
36 32, // 2816MB | |
37 35, // 3072MB | |
38 38, // 3328MB | |
39 40 // 3584MB | |
darin (slow to review)
2009/02/19 18:40:02
40 seems too high to me. can we just double our p
| |
25 }; | 40 }; |
26 | 41 |
27 static unsigned int max_count = 0; | 42 static unsigned int max_count = 0; |
28 if (!max_count) { | 43 if (!max_count) { |
29 size_t memory_tier = base::SysInfo::AmountOfPhysicalMemoryMB() / 256; | 44 size_t memory_tier = base::SysInfo::AmountOfPhysicalMemoryMB() / 256; |
30 if (memory_tier >= arraysize(kMaxRenderersByRamTier)) | 45 if (memory_tier >= arraysize(kMaxRenderersByRamTier)) |
31 max_count = chrome::kMaxRendererProcessCount; | 46 max_count = chrome::kMaxRendererProcessCount; |
32 else | 47 else |
33 max_count = kMaxRenderersByRamTier[memory_tier]; | 48 max_count = kMaxRenderersByRamTier[memory_tier]; |
34 } | 49 } |
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151 | 166 |
152 return NULL; | 167 return NULL; |
153 } | 168 } |
154 | 169 |
155 void RenderProcessHost::Unregister() { | 170 void RenderProcessHost::Unregister() { |
156 if (host_id_ >= 0) { | 171 if (host_id_ >= 0) { |
157 all_hosts.Remove(host_id_); | 172 all_hosts.Remove(host_id_); |
158 host_id_ = -1; | 173 host_id_ = -1; |
159 } | 174 } |
160 } | 175 } |
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