Shared runtime code now goes through runtime/platform/platform.h, implemented by platform/win32.c and a new
platform/linux.c: futex locks, a userfaultfd and PAGEMAP_SCAN write watch, signal-based async preemption, our own
fiber switch, and a SIGSEGV handler for the thaw and crash hooks. The window, input, menu and software keyboard get
SDL3 back ends beside the Win32 ones, with the swapchain (gfx_present.c) and input merging (input.c) shared. SHA-256
replaces BCrypt, ELF builds get their own override sections, and the build tools gain Linux branches.
On Linux the selftest and the gfx-abi, astc, nvn and window probes pass. probe-vkmem still fails: imported guest
memory cannot be write-watched on Linux, which the shadow buffers in vk_memory.c will address.
Comments cited codes from local notes (port-lessons P1, backlog), task labels (T6c1-T6c3, M4), bare upstream commit
hashes and issue numbers, a file that no longer exists (nvn_api.c, now nvn_api_*.c), a generated file (main_0103.c)
and line numbers into upstream files that refs/ has moved past, so they pointed at unrelated code. Those now name the
file, function or project and say what the cited code does. Attribution of copied code keeps its pinned commits.
Corrected facts: TOTK_REPLAY_ASYNC defaults to 0, and the shader cache, pipeline cache and pipeline keys live next to
totk.exe, not in build/v121.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The sampler keeps the last half second of every thread's chains in a ring and writes the samples of a present interval over the threshold to <TOTK_PROFILE>.f<frame>, per thread and time (tstack), with the samples that took over 2 ms to stop their thread (tstall: the thread was in a long kernel call). A thread that ran no cycle since its last sample repeats its chain without being suspended. A thread stopped between its sub rsp and the stack probe has Rsp in the guard page; copying from there raised STATUS_GUARD_PAGE_VIOLATION and ended a run.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Render-thread chains could not show which guest thread held a virtual core during a stall; with every thread's
chains over a short frame range the running samples name it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Each submission part writes a timestamp pair under TOTK_TRACE=perf; the completion thread reads it and sums the busy
time without double-counting overlap. A second 60-frame perf line carries GPU ms per frame, fence waits of the render
thread and of other threads, VRAM usage and budget (VK_EXT_memory_budget, else the allocator's own blocks against the
heap size), working set and private bytes, and bound: gpu, cpu or pace. Devices without timestamp bits or a timestamp
period log one line and show gpu n/a.
vk_mem_resolve now reports the pool class of a span. The replay counts bytes bound or copied per class and use, and
vk_mem_census logs the live pools by kind and flags with that traffic at frame 1800 (every 1800 frames with perf).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
