mirror of
https://github.com/MobileGL-Dev/MobileGL
synced 2026-11-07 01:53:24 +09:00
112 lines
4.6 KiB
Python
112 lines
4.6 KiB
Python
#!/usr/bin/env python3
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# MobileGL - tools/device_bench/disagg/layers.py
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# Copyright (c) 2025-2026 MobileGL-Dev
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# Licensed under the GNU Lesser General Public License v3.0:
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# https://www.gnu.org/licenses/gpl-3.0.txt
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# https://www.gnu.org/licenses/lgpl-3.0.txt
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# SPDX-License-Identifier: LGPL-3.0-only
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# End of Source File Header
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"""Split one thread of a simpleperf profile by LAYER, in ms per frame.
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python layers.py <perf.data> <binary_cache> <thread comm> <cpu_ms_per_frame> [--tail-ms=N]
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Each sample goes to the layer of the first frame, walking from the leaf toward the root, that
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belongs to one: the GPU driver (vendor GLES/Vulkan libraries, kgsl), the backend (MG_Backend),
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the applier (MGPipeApply*, the record sink, the wire decoder), the client half (the frontend,
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the validate point and its emitters, the verb port, the wire encoder), or the replay harness
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(apitrace parsing and dispatch). Library code with no layer of its own (malloc, memcpy, atomics)
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lands in the layer that called it. Kernel frames count as the driver only below a driver frame.
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"""
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import os
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import sys
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from collections import Counter
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sys.path.insert(0, os.environ.get("SIMPLEPERF_DIR", ""))
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from simpleperf_report_lib import ReportLib # noqa: E402
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LAYERS = ["driver", "backend", "applier", "client half", "harness", "other"]
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def layer_of(symbol, dso):
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if any(k in dso for k in ("adreno", "libGLESv2", "libEGL_", "vulkan.", "libgsl", "libllvm-glnext", "msm_kgsl")):
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return "driver"
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if "MG_Backend::" in symbol:
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return "backend"
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if ("MGPipeApply" in symbol or "RecordVerbSink" in symbol or "PipeWireDecoder" in symbol
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or "PipeApplier::" in symbol or "ServerLoop::" in symbol):
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return "applier"
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if any(k in symbol for k in ("MG_Pipe::", "MG_Impl::", "MG_Record::", "MG_State::", "MG_Remote::Client",
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"PipeWireEncoder", "MG_Util::")) or "libMobileGL" in dso and symbol.startswith("gl"):
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return "client half"
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if any(k in symbol for k in ("trace::", "retrace", "Brotli", "mobilegl_apitrace", "mobilegl_trace")):
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return "harness"
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return None
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def tail_start(data, symfs, tail_ms):
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if not tail_ms:
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return 0
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lib = ReportLib()
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lib.SetRecordFile(data)
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lib.SetSymfs(symfs)
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last = 0
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while True:
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sample = lib.GetNextSample()
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if sample is None:
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break
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chain = lib.GetCallChainOfCurrentSample()
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if any("retrace::retraceCall" in chain.entries[i].symbol.symbol_name for i in range(chain.nr)):
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last = max(last, sample.time)
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return last - int(tail_ms * 1e6)
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def main():
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args = [a for a in sys.argv[1:] if not a.startswith("--")]
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tail = next((float(a.split("=", 1)[1]) for a in sys.argv[1:] if a.startswith("--tail-ms=")), 0.0)
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data, symfs, comm, cpu = args[0], args[1], args[2], float(args[3])
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start = tail_start(data, symfs, tail)
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lib = ReportLib()
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lib.SetRecordFile(data)
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lib.SetSymfs(symfs)
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counts = Counter()
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detail = Counter()
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detail_layer = next((a.split("=", 1)[1] for a in sys.argv[1:] if a.startswith("--detail=")), None)
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total = 0
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while True:
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sample = lib.GetNextSample()
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if sample is None:
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break
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if comm not in sample.thread_comm or sample.time < start:
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continue
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total += 1
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leaf = lib.GetSymbolOfCurrentSample()
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frames = [(leaf.symbol_name, leaf.dso_name)]
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chain = lib.GetCallChainOfCurrentSample()
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frames += [(chain.entries[i].symbol.symbol_name, chain.entries[i].symbol.dso_name) for i in range(chain.nr)]
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found = None
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owner = None
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for symbol, dso in frames:
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if "kallsyms" in dso:
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continue
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found = layer_of(symbol, dso)
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if found:
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owner = symbol
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break
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counts[found or "other"] += 1
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if detail_layer and found == detail_layer:
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# the outermost frame of the same layer below the first non-layer caller: the entry
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# into that layer, e.g. MGPipeValidateForVerb or EmitDrawRecord for the client half
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names = [f for f, d in frames if layer_of(f, d) == found]
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detail[owner.split("(")[0][-90:] + " <- " + names[-1].split("(")[0][-60:]] += 1
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print(f"{comm}: {total} samples, {cpu:.2f} ms/frame")
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for name in LAYERS:
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share = counts[name] / max(1, total)
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print(f" {name:12} {100 * share:5.1f}% {cpu * share:6.2f} ms/frame")
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for key, n in detail.most_common(30):
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print(f" {cpu * n / max(1, total):6.3f} ms {key}")
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if __name__ == "__main__":
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main()
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