Fast, Accurate Performance Profiles

Hotspot analysis finds functions using the most time. Click [+] for the call stacks. Double click to see the source.

See the results on your source

A double click from the function list takes you to the hottest spot in the function.

Locks and Waits

Quickly find a common cause of slow performance in parallel programs: waiting too long time on a lock while the cores are underutilized during the wait.

Timeline filters results

Select a time range in the timeline and filter out data (e.g., application startup) that masks accurate results.

See when threads are running and waiting and when transitions occur.

Profile a Running Application

No need to stop and re-launch the application when profiling

• Attach to Process(Windows only)

• Profile System with EBS (Windows & Linux)

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System Wide Event Based Sampling (EBS)

Uses the on chip PMU to count performance events like cache misses, clock ticks and instructions retired.

Predefined EBS Profiles

Easy EBS setup for newer processors. No memorizing complex event names. Profiles vary by microarchitecture.

Opportunities Highlighted

General Exploration turns the cell pink when it suspects a tuning opportunity is present. Hover gives suggestions