chrg6
0e918d4846
Log at exit, and with trace = perf every 600 presents when they moved, how often the game's threads met at the present: frames whose bookkeeping went to the next submission, held presents another thread put out, and the presenting thread's waits for one.
...
The submit-path changes leave three numbers a play-test needs: how many presents left their frame's bookkeeping to the
next submission because another thread held the submission lock (fo_owed_n) and how many frames a submission caught
up (fo_late_n); how many held presents another thread's submission put out (ph_out compares the thread with the one
that presented, now kept in PhJob.tid); and how often the presenting thread waited for PH.lock while one went out,
with the time in all and the longest (vk_present_held.h's counts). vk_backend.c order_log writes them on one line:
with the synchronous replay at exit (gfx_exit_log, "vk: over the run to frame N: frame bookkeeping: ..."), and with
NX2NAVI_TRACE=perf at every 600th present when a count moved since the last such line ("perf: since the last such
line, at frame N: ..."). With present_order = 0 the bookkeeping counts stay 0. The presenting thread's wait is also in
the slow-frame lines' "drain" since the lock commit. No timing change.
Checks that passed: pass_cc_check of vk_backend.c with no new -Wall -Wextra warnings, present_held_check,
perf_summary_check.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com >
2026-11-13 20:13:02 -05:00
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