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    <h1><span>System profiling,</span> <span>app tracing</span> <span>and trace analysis</span></h1>
    <h2>Open-Source &centerdot; Portable &centerdot; Efficient</h2>
    <div class="home-img"><img src="/assets/home.png" alt="Perfetto"></div>
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    <a href="#profiling"><div class="icon"></div>System Profiling</a>
    <a href="#tracing"><div class="icon"></div>In-App Tracing</a>
    <a href="#viewer"><div class="icon"></div>Trace Viewer</a>
    <a href="#analysis"><div class="icon"></div>Trace Analysis</a>
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    <img src="/assets/sys_profiling.png" alt="Profiling illustration">
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      <h2>System-wide profiling for Linux and Android</h2>
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        <h3>Linux kernel tracing</h3>
        <p>Capture high frequency ftrace data: scheduling activity, task switching latency, CPU frequency and much more</p>
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        <h3>Userspace profilers and extra probes</h3>
        <p>Native heap profiling, Java heap profiling, pollers for /proc stat files</p>
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        <h3>Built into Android</h3>
        <p>Part of the platform since Android 9 Pie, runs on Linux as well</p>
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      <a href="/docs/quickstart/android-tracing" class="button">Get Started</a>
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     <h2>App Tracing</h2>
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        <h3>Efficient trace point instrumentation</h3>
        <p>Log your C++ app’s activity with high throughput, low overhead trace points</p>
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        <h3>Structured and configurable events</h3>
        <p>Define custom protobuf messages to represent strongly-typed app-specific information, trace only what you need</p>
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        <h3>Integrated with system-wide tracing</h3>
        <p>Correlate your app’s state with system-wide profiling data on the same timeline</p>
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      <a href="/docs/instrumentation/tracing-sdk" class="button">Get Started</a>
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      <h2>Trace Viewer</h2>
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        <h3>Interactive trace exploration</h3>
        <p>Record, view and process trace data with the Perfetto UI</p>
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        <h3>Supports popular trace format files</h3>
        <p>TraceEvent JSON, Android systrace, ftrace text output</p>
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        <h3>Runs fully in your browser</h3>
        <p>No server interaction involved, works even if you are offline</p>
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        <a href="//ui.perfetto.dev" class="button">Open the UI</a>
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      <h2>Trace Analysis</h2>
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        <h3>SQL-based trace model</h3>
        <p>Trace processor ingests traces and exposes a SQLite-based
           interface to access the contents of the trace, both via shell and UI
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        <h3>Large trace analysis</h3>
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          Supports traces up to tens of GBs
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        <h3>Interoperable</h3>
        <p>Can import and export popular trace formats: Chromium JSON trace format, Android Systrace, ftrace, CSV</p>
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        <a href="/docs/analysis/trace-processor" class="button">Learn more</a>
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