commit | 916c761400646667da616842e394b5c7cc4b6f43 | [log] [tgz] |
---|---|---|
author | Hector Dearman <hjd@google.com> | Mon Jul 09 15:42:22 2018 +0100 |
committer | Hector Dearman <hjd@google.com> | Mon Jul 09 15:42:22 2018 +0100 |
tree | 3184901ce9297f6e0e00ef6e1b6b6653a3af1947 | |
parent | 3d26fdb55fe716cfa3bbc258e85573f74a696601 [diff] |
perfetto-ui: Add state holder - Add a new directory: common/ for code which is common to frontend/ and controller/ but not general purpose (base/). - Add the monolithic state interface (common/state.ts). - Add frontend/globals.ts for global variables the whole frontend needs to access. For now this will contain: - the state store - the dispatch function If this grows too much we'll have to revisit and find a better solution but for now this seems resonable. Bug: 111101304 Change-Id: Ia79a0da0e53c19eae5242469aaa6ffdeaa7567f4
Perfetto is an open-source project for performance instrumentation and tracing of Linux/Android/Chrome platforms and user-space apps.
It consists of:
A portable, high efficiency, user-space tracing library
designed for tracing of multi-process systems, based on zero-alloc zero-copy zero-syscall (on fast-paths) writing of protobufs over shared memory.
OS-wide Linux/Android probes for platform debugging
Web-based frontend
A UI for inspection and analysis of traces (coming soon).
Batch processing of traces
A python / C++ (TBD) library for trace-based metrics (coming soon).
Perfetto is building the next-gen unified tracing ecosystem for:
The goal is to create an open, portable and developer friendly tracing ecosystem for app and platform performance debugging.
Designed for production
Perfetto's tracing library and daemons are designed for use in production. Privilege isolation is a key design goal:
See docs/security-model.md for more details.
Long traces
Pefetto aims at supporting hours-long / O(100GB) traces, both in terms of recording backend and UI frontend.
Interoperability
Perfetto traces (output) and configuration (input) consists of protobuf messages, in order to allow interoperability with several languages.
See docs/trace-format.md for more details.
Composability
As Perfetto is designed both for OS-level tracing and app-level tracing, its design allows to compose several instances of the Perfetto tracing library, allowing to nest multiple layers of tracing and drive then with the same frontend. This allows powerful blending of app-specific and OS-wide trace events. See docs/multi-layer-tracing.md for more details.
Portability
The only dependencies of Perfetto's tracing libraries are C++11 and Protobuf lite (plus google-test, google-benchmark, libprotobuf-full for testing).
Extensibility
Perfetto allows third parties to defined their own protobufs for:
Allowing apps to define their own strongly-typed input and output schema. See docs/trace-format.md for more details.