1739304851270459649

archive/threads/NOTimothyLottes/2023-12-25-virtualized-xmas-thread/index.md

@@ -0,0 +1,62 @@
+---
+title: "Virtualized-xMas <thread>"
+type: archive
+source: twitter
+source_url: "https://x.com/NOTimothyLottes/status/1739304851270459649"
+author: "NOTimothyLottes"
+handle: NOTimothyLottes
+post_id: "1739304851270459649"
+date: 2023-12-25
+archived: 2026-08-26
+draft: false
+tags:
+  - archive
+  - twitter
+  - NOTimothyLottes
+description: "Virtualized-xMas <thread>"
+in_reply_to: ""
+---
+
+## Source
+
+- URL: https://x.com/NOTimothyLottes/status/1739304851270459649
+- Author: NOTimothyLottes (@NOTimothyLottes)
+- Posted: 2023-12-25 15:19:25
+
+## Thread
+
+**1/** **@NOTimothyLottes** ^1739304851270459649
+
+Virtualized-xMas <thread>
+
+[0] If one is going to pay the HW VM tax, might as well be able to actually use it via the techniques below, so we can exit this medieval dark age.
+
+**2/** **@NOTimothyLottes** ^1739305164060721321
+
+[1] Ability to get portable same virtual addresses so data can be directly streamed into same address without any need to relink pointers.
+
+[2] Ability to use huge virtual address spaces for big data, with pipelined page table updates so execution need not stall during streaming
+
+**3/** **@NOTimothyLottes** ^1739305283061416168
+
+[3] Ability to map memory with the same zero page to avoid crashes on accessing memory outside the VA.
+
+[4] Ability to use large pages without admin rights, with an os/driver that can defragment to build them.
+
+**4/** **@NOTimothyLottes** ^1739305434509382019
+
+[5] Ability to construct ring buffers that repeat the same physical pages in the virtual address space to avoid wrapping overheads.
+
+[6] Ability to alias the same physical memory at different virtual addresses to avoid having to flush the virtual tagged caches on dependent passes
+
+**5/** **@NOTimothyLottes** ^1739305541975875925
+
+[7] Ability to lock pages to ensure quality of service.
+
+[8] Ability to specify which physical pages should be recycled, and explicit map shared zero page where the address space has holes.
+
+**6/** **@NOTimothyLottes** ^1739305653821133143
+
+[9] Ability to control where page updates happen in time and also where TLB flushes happen with respect to the application's address space.
+
+[10] Ability to map IO buffers direct into the GPU/CPU address space, like audio ring buffers, network IO, and solid state storage.

archive/threads/NOTimothyLottes/index.md

@@ -30,6 +30,7 @@ tags:
 - [[archive/threads/NOTimothyLottes/2023-12-16-inspecting-my-old-vk-engines]]
 - [[archive/threads/NOTimothyLottes/2023-12-19-working-towards-a-public-domain-release-of-a]]
 - [[archive/threads/NOTimothyLottes/2023-12-20-another-bad-habit-i-dont-include]]
+- [[archive/threads/NOTimothyLottes/2023-12-25-virtualized-xmas-thread]]
 - [[archive/threads/NOTimothyLottes/2023-12-26-no-luck-getting-d3dkmtgetscanline-to-work-thus-far]]
 - [[archive/threads/NOTimothyLottes/2023-12-29-end-of-2023-scaling-parallel-gfx-and-memory-thread]]
 - [[archive/threads/NOTimothyLottes/2023-12-30-temporally-amortized-translucency-multi-bounce-gi]]