Yaya48andClaude Opus 5.5
b457eb18c3
The probe ran every image for a fixed 512 slices of 4096 ARM cycles (2097152). StarOS's EXP-003 images hash MEM2 and time series of operations, which need more (StarOS experiments/proposals/mmu-console.md, P-7 and P-8). --cycles <n> sets the budget: a decimal number of cycles, a whole number of slices, from one slice to 2^30, given once; anything else is a usage error (exit 2), never rounded. Without it the probe runs 2097152 cycles, as before, and the timeout messages name the budget. The parser is in ProbeBudget.h, tested by StarletProbeBudgetTest. Co-Authored-By: Claude Opus 5.5 <[email protected]>
42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
// Copyright 2026 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <optional>
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#include <string_view>
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#include "Common/CommonTypes.h"
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// How long StarletBootstrapProbe runs an image: whole slices of SLICE_CYCLES ARM cycles, between
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// which it checks for a fault, a panic or a terminal trace line. --cycles <n> sets the budget;
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// without it, the probe runs DEFAULT_CYCLES, as it always has. StarOS's EXP-003 images hash MEM2
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// and time series of operations, which take more than that (StarOS
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// experiments/proposals/mmu-console.md, P-7 and P-8).
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namespace StarletBootstrapProbe
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{
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constexpr u32 SLICE_CYCLES = 4096;
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constexpr u64 DEFAULT_CYCLES = 512 * SLICE_CYCLES;
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// 2^30 cycles: 262,144 slices.
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constexpr u64 MAX_CYCLES = u64{1} << 30;
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// The budget --cycles asks for: a decimal number of cycles, a whole number of slices, from one
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// slice to MAX_CYCLES. Anything else is refused (nullopt), never rounded.
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inline std::optional<u64> ParseCycles(std::string_view text)
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{
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// Twelve digits cannot overflow a u64; MAX_CYCLES has ten.
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if (text.empty() || text.size() > 12)
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return std::nullopt;
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u64 value = 0;
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for (const char digit : text)
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{
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if (digit < '0' || digit > '9')
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return std::nullopt;
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value = value * 10 + static_cast<u64>(digit - '0');
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}
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if (value == 0 || value % SLICE_CYCLES != 0 || value > MAX_CYCLES)
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return std::nullopt;
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return value;
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}
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} // namespace StarletBootstrapProbe
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