mirrors/tracy
1
0
Fork 0
mirror of https://github.com/wolfpld/tracy synced 2025-04-29 12:23:53 +00:00
Code Issues Releases Wiki Activity

Reword resolution claims.

Browse Source
This commit is contained in:
Bartosz Taudul 2017-11-18 20:01:44 +01:00
parent 16e9bcfe75
commit 5776effc9b
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
README.md
View File

@ -115,8 +115,8 @@ You also need to periodically collect the GPU events using the `TracyGpuCollect`
Tracy's time measurement precision is not infinite. It's only as good as the system-provided timers are. Tracy's time measurement precision is not infinite. It's only as good as the system-provided timers are.
- On the embedded ARM-based systems you can expect to have 1 µs time resolution. Some hardware is able to provide hundreds-nanoseconds resolution. - On the embedded ARM-based systems you can expect to have 1 µs time resolution. Some hardware is able to provide tens to hundreds nanoseconds resolution.
- On x86 the time resolution depends on the hardware implementation of the RDTSCP instruction and typically is in the low nanoseconds. This may vary from one micro-architecture to another and requires a fairly modern (Sandy Bridge) processor for reliable results. - On x86 the time resolution depends on the hardware implementation of the RDTSCP instruction and typically is a couple of nanoseconds. This may vary from one micro-architecture to another and requires a fairly modern (Sandy Bridge) processor for reliable results.
While the data collection is very lightweight, it is not completely free. Each recorded zone event has a cost, which tracy tries to calculate and display on the timeline view, as a red zone. Note that this is an *approximation* of the real cost, which ignores many important factors. For example, you can't determine the impact of cache effects. The CPU frequency may be reduced in some situations, which will increase the recorded time, but the displayed profiler cost will not compensate for that. While the data collection is very lightweight, it is not completely free. Each recorded zone event has a cost, which tracy tries to calculate and display on the timeline view, as a red zone. Note that this is an *approximation* of the real cost, which ignores many important factors. For example, you can't determine the impact of cache effects. The CPU frequency may be reduced in some situations, which will increase the recorded time, but the displayed profiler cost will not compensate for that.