diff options
Diffstat (limited to 'base/tracked_objects.h')
| -rw-r--r-- | base/tracked_objects.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/base/tracked_objects.h b/base/tracked_objects.h index 5068e6a..806934f 100644 --- a/base/tracked_objects.h +++ b/base/tracked_objects.h @@ -26,7 +26,7 @@ // across a series of objects so that the counts and times can be rapidly // updated without (usually) having to lock the data, and hence there is usually // very little contention caused by the tracking. The data can be viewed via -// the about:tracking URL, with a variety of sorting and filtering choices. +// the about:profiler URL, with a variety of sorting and filtering choices. // // These classes serve as the basis of a profiler of sorts for the Tasks system. // As a result, design decisions were made to maximize speed, by minimizing @@ -118,7 +118,7 @@ // // The above description tries to define the high performance (run time) // portions of these classes. After gathering statistics, calls instigated -// by visiting about:tracking will assemble and aggregate data for display. The +// by visiting about:profiler will assemble and aggregate data for display. The // following data structures are used for producing such displays. They are // not performance critical, and their only major constraint is that they should // be able to run concurrently with ongoing augmentation of the birth and death @@ -153,7 +153,7 @@ // (example: how many threads are in a specific consecutive set of Snapshots? // What was the total birth count for that set? etc.). Aggregation instances // collect running sums of any set of snapshot instances, and are used to print -// sub-totals in an about:tracking page. +// sub-totals in an about:profiler page. // // TODO(jar): I need to store DataCollections, and provide facilities for taking // the difference between two gathered DataCollections. For now, I'm just @@ -663,6 +663,13 @@ class BASE_EXPORT ThreadData { static bool InitializeAndSetTrackingStatus(bool status); static bool tracking_status(); + // Special versions of Now() for getting times at start and end of a tracked + // run. They are super fast when tracking is disabled, and have some internal + // side effects when we are tracking, so that we can deduce the amount of time + // accumulated outside of execution of tracked runs. + static TrackedTime NowForStartOfRun(); + static TrackedTime NowForEndOfRun(); + // Provide a time function that does nothing (runs fast) when we don't have // the profiler enabled. It will generally be optimized away when it is // ifdef'ed to be small enough (allowing the profiler to be "compiled out" of @@ -722,7 +729,7 @@ class BASE_EXPORT ThreadData { static base::ThreadLocalStorage::Slot tls_index_; // Link to the most recently created instance (starts a null terminated list). - // The list is traversed by about:tracking when it needs to snapshot data. + // The list is traversed by about:profiler when it needs to snapshot data. // This is only accessed while list_lock_ is held. static ThreadData* all_thread_data_list_head_; // Set of ThreadData instances for use with worker threads. When a worker |