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xenia-rs/tools/diff-events/test_build_manifest.py
MechaCat02 ad45873a1b ITERATE-2.V: scheduler priority aging closes 18-day AUDIT-049 wedge 
Priority aging in xenia-cpu/scheduler.rs:pick_runnable
(effective_priority = base + age_bonus(now_round - last_run_round),
capped at +31, AGING_ROUNDS_PER_BONUS=1). Strict-priority was parking
priority=0 threads behind CPU-bound priority=15 audio mixer
(sub_824D1328 guest spinwait at PC=0x824d1404 on CPU5). Aging
eventually picks the starved thread, breaking the producer-consumer
cycle that caused 5-tid wedge at PC=0x824ac578 since AUDIT-049 (10 May).

Cascade observed: tid=13 clean exit; events 121K -> 13M (107x); last
host_ns 767ms -> 51,011ms (66x); 8 new threads spawn; VdSwap 1 -> 2.

Complete two-day iterate sequence (2026-05-27 -> 2026-05-28):
- 2.F: VdSwap drain timeout 900ms -> 1ms (xenia-gpu/handle.rs); 876x
       perf win on VdSwap kernel callback
- 2.H: vA0000000 physical heap bucket added (state.rs, exports.rs);
       ctx_ptrs now in 0xA0000000-0xBFFFFFFF range matching canary
- 2.L: Phase-A diff harness categorized [return_value mismatch],
       [status mismatch], [args_resolved.path mismatch] tags
       (tools/diff-events/diff_events.py); closes reading-error #41
       (silent test-harness state leak invalidating trace diffs)
- 2.M: always-on exit-thread-state.json sibling to Phase-A JSONL
       (event_log.rs + xenia-app/main.rs); closes reading-error #42
       (Phase-A blind to blocked-forever waits)
- 2.Q: signal.match kernel instrumentation in NtSetEvent /
       NtReleaseSemaphore / KeSetEvent / KeReleaseSemaphore
       (exports.rs); emits target_handle + waiter_count + waiter_tids
- 2.T: wake.requested kernel instrumentation in wake_eligible_waiters
       (exports.rs); emits target_tid + transition + new_state
- 2.V: scheduler priority aging (xenia-cpu/scheduler.rs) [keystone]

Plus accumulated WIP from earlier May (contention_manifest,
phase_b_snapshot, xam/xaudio enhancements, analysis db, xex loader,
xenia-app main loop, etc.). Audit-runs/ artifacts remain untracked
per project convention.

Tests: 300 xenia-cpu / 227 xenia-kernel / 5 xenia-app / 19 xenia-path
/ 30+ smaller suites -- all PASS, 0 regressions. Determinism preserved
(2x cold runs bit-identical at 13,003,881 events post-2.V).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-29 07:27:26 +02:00

300 lines
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#!/usr/bin/env python3
"""Unit tests for `build_contention_manifest.py`.
Run as `python3 test_build_manifest.py` — prints `PASS` per test.
"""
import json
import sys
import tempfile
from pathlib import Path
sys.path.insert(0, str(Path(__file__).parent))
from build_contention_manifest import build_manifest, render_summary # noqa: E402
def write_jsonl(lines: list[str]) -> Path:
tmp = tempfile.NamedTemporaryFile(
mode="w", suffix=".jsonl", delete=False, encoding="utf-8"
)
for line in lines:
tmp.write(line + "\n")
tmp.close()
return Path(tmp.name)
def mk_event(
kind: str,
tid: int,
idx: int,
payload: dict,
engine: str = "canary",
) -> str:
return json.dumps(
{
"schema_version": 1,
"engine": engine,
"kind": kind,
"tid": tid,
"tid_event_idx": idx,
"guest_cycle": 0,
"host_ns": 0,
"deterministic": True,
"payload": payload,
}
)
def test_basic_extract() -> None:
src = write_jsonl([
mk_event("import.call", 6, 0, {"name": "Foo"}),
mk_event(
"contention.observed",
6,
104664,
{"cs_ptr": "0xbc65c890", "site_sid": "c26a128b", "contended": True},
),
mk_event("import.call", 6, 1, {"name": "Bar"}),
])
m = build_manifest(src)
assert m["version"] == 1
assert m["summary"]["total_input_events"] == 3
assert m["summary"]["total_contention_events_kept"] == 1
assert m["summary"]["per_tid_counts"] == {"6": 1}
e = m["entries"][0]
assert e["tid"] == 6 and e["tid_event_idx"] == 104664
assert e["site_sid"] == "c26a128b" and e["cs_ptr"] == "0xbc65c890"
assert e["contended"] is True
print("PASS test_basic_extract")
def test_filters_non_contention_kinds() -> None:
src = write_jsonl([
mk_event("handle.create", 6, 0, {"handle_semantic_id": "x"}),
mk_event("wait.begin", 6, 1, {"handles_semantic_ids": ["x"]}),
mk_event("kernel.call", 6, 2, {"name": "X"}),
mk_event(
"contention.observed",
7,
42,
{"cs_ptr": "0x1000", "site_sid": "deadbeef", "contended": True},
),
])
m = build_manifest(src)
assert m["summary"]["total_contention_events_kept"] == 1
assert m["entries"][0]["tid"] == 7
print("PASS test_filters_non_contention_kinds")
def test_filters_contended_false() -> None:
# Stage 1's emitter never emits contended=false today, but defensive
# filter must skip those if a future variant adds them.
src = write_jsonl([
mk_event(
"contention.observed",
6,
10,
{"cs_ptr": "0xa", "site_sid": "11", "contended": False},
),
mk_event(
"contention.observed",
6,
11,
{"cs_ptr": "0xa", "site_sid": "11", "contended": True},
),
])
m = build_manifest(src)
assert m["summary"]["total_contention_events_kept"] == 1
assert m["entries"][0]["tid_event_idx"] == 11
print("PASS test_filters_contended_false")
def test_sorts_by_tid_then_idx() -> None:
src = write_jsonl([
mk_event(
"contention.observed",
9,
5,
{"cs_ptr": "0x9", "site_sid": "99", "contended": True},
),
mk_event(
"contention.observed",
6,
200,
{"cs_ptr": "0xb", "site_sid": "bb", "contended": True},
),
mk_event(
"contention.observed",
6,
100,
{"cs_ptr": "0xa", "site_sid": "aa", "contended": True},
),
])
m = build_manifest(src)
keys = [(e["tid"], e["tid_event_idx"]) for e in m["entries"]]
assert keys == [(6, 100), (6, 200), (9, 5)], keys
print("PASS test_sorts_by_tid_then_idx")
def test_deduplicates_same_tid_idx() -> None:
src = write_jsonl([
mk_event(
"contention.observed",
6,
42,
{"cs_ptr": "0xa", "site_sid": "aa", "contended": True},
),
mk_event(
"contention.observed",
6,
42,
{"cs_ptr": "0xb", "site_sid": "bb", "contended": True},
),
])
m = build_manifest(src)
assert m["summary"]["total_contention_events_kept"] == 1
assert m["summary"]["skipped_duplicate_keys"] == 1
# Keeps the first occurrence.
assert m["entries"][0]["cs_ptr"] == "0xa"
print("PASS test_deduplicates_same_tid_idx")
def test_skips_missing_fields() -> None:
src = write_jsonl([
# Missing site_sid.
mk_event(
"contention.observed",
6,
1,
{"cs_ptr": "0xa", "contended": True},
),
# Missing cs_ptr.
mk_event(
"contention.observed",
6,
2,
{"site_sid": "aa", "contended": True},
),
# Both present — kept.
mk_event(
"contention.observed",
6,
3,
{"cs_ptr": "0xb", "site_sid": "bb", "contended": True},
),
])
m = build_manifest(src)
assert m["summary"]["total_contention_events_kept"] == 1
assert m["summary"]["skipped_bad_lines"] == 2
print("PASS test_skips_missing_fields")
def test_handles_bad_json_lines() -> None:
src = write_jsonl([
"not-json",
mk_event(
"contention.observed",
6,
1,
{"cs_ptr": "0xa", "site_sid": "aa", "contended": True},
),
"{\"truncated\":",
])
m = build_manifest(src)
assert m["summary"]["total_contention_events_kept"] == 1
assert m["summary"]["skipped_bad_lines"] == 2
print("PASS test_handles_bad_json_lines")
def test_render_summary_human_readable() -> None:
src = write_jsonl([
mk_event(
"contention.observed",
6,
1,
{"cs_ptr": "0xa", "site_sid": "aa", "contended": True},
),
mk_event(
"contention.observed",
14,
100,
{"cs_ptr": "0xb", "site_sid": "bb", "contended": True},
),
])
m = build_manifest(src)
out = render_summary(m)
assert "contention events kept: 2" in out
assert "tid= 6 1" in out
assert "tid= 14 1" in out
print("PASS test_render_summary_human_readable")
def test_empty_input_yields_zero_kept() -> None:
src = write_jsonl([mk_event("import.call", 0, 0, {"name": "X"})])
m = build_manifest(src)
assert m["summary"]["total_contention_events_kept"] == 0
assert m["entries"] == []
print("PASS test_empty_input_yields_zero_kept")
def test_tid_map_translates_canary_to_ours() -> None:
src = write_jsonl([
mk_event(
"contention.observed",
6,
104664,
{"cs_ptr": "0xbc65c890", "site_sid": "c26a128bf45411f7", "contended": True},
),
mk_event(
"contention.observed",
7,
10,
{"cs_ptr": "0xa", "site_sid": "aa", "contended": True},
),
])
m = build_manifest(src, tid_map={6: 1, 7: 2})
assert m["entries"][0]["tid"] == 1, m["entries"][0]
assert m["entries"][1]["tid"] == 2
print("PASS test_tid_map_translates_canary_to_ours")
def test_tid_map_drops_unmapped_canary_tids() -> None:
src = write_jsonl([
mk_event(
"contention.observed",
6,
100,
{"cs_ptr": "0xa", "site_sid": "aa", "contended": True},
),
mk_event(
"contention.observed",
99,
200,
{"cs_ptr": "0xb", "site_sid": "bb", "contended": True},
),
])
m = build_manifest(src, tid_map={6: 1})
assert m["summary"]["total_contention_events_kept"] == 1
assert m["summary"]["skipped_unmapped_tids"] == 1
assert m["entries"][0]["tid"] == 1
print("PASS test_tid_map_drops_unmapped_canary_tids")
if __name__ == "__main__":
tests = [
test_basic_extract,
test_filters_non_contention_kinds,
test_filters_contended_false,
test_sorts_by_tid_then_idx,
test_deduplicates_same_tid_idx,
test_skips_missing_fields,
test_handles_bad_json_lines,
test_render_summary_human_readable,
test_empty_input_yields_zero_kept,
test_tid_map_translates_canary_to_ours,
test_tid_map_drops_unmapped_canary_tids,
]
for t in tests:
t()
print(f"\nALL {len(tests)} TESTS PASS")
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