Include CPU information in UMA system profile.

This is particularly useful to help determine which CPUs fail to tick
monotonically in HighResNow() on Windows.

BUG=254211

Review URL: https://chromiumcodereview.appspot.com/17770005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@212323 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 5 insertions, 1 deletions

diff --git a/base/cpu.cc b/base/cpu.cc
index 4a94af0..1761529 100644
--- a/base/cpu.cc
+++ b/base/cpu.cc
@@ -19,7 +19,8 @@
 namespace base {
 
 CPU::CPU()
-  : type_(0),
+  : signature_(0),
+    type_(0),
     family_(0),
     model_(0),
     stepping_(0),
@@ -105,6 +106,7 @@ void CPU::Initialize() {
   // Interpret CPU feature information.
   if (num_ids > 0) {
     __cpuid(cpu_info, 1);
+    signature_ = cpu_info[0];
     stepping_ = cpu_info[0] & 0xf;
     model_ = ((cpu_info[0] >> 4) & 0xf) + ((cpu_info[0] >> 12) & 0xf0);
     family_ = (cpu_info[0] >> 8) & 0xf;
diff --git a/base/cpu.h b/base/cpu.h
index 1d45258..509763e 100644
--- a/base/cpu.h
+++ b/base/cpu.h
@@ -31,6 +31,7 @@ class BASE_EXPORT CPU {
 
   // Accessors for CPU information.
   const std::string& vendor_name() const { return cpu_vendor_; }
+  int signature() const { return signature_; }
   int stepping() const { return stepping_; }
   int model() const { return model_; }
   int family() const { return family_; }
@@ -55,6 +56,7 @@ class BASE_EXPORT CPU {
   // Query the processor for CPUID information.
   void Initialize();
 
+  int signature_;  // raw form of type, family, model, and stepping
   int type_;  // process type
   int family_;  // family of the processor
   int model_;  // model of processor