This allows the new cache to be implemented more efficiently using the old cache backends because functionality like the corruption wrapper and key length limiter can be bypassed and the individual backends can store cache records in whatever way is most efficient for them.
The hierarchical backend may request payloads when they are not required due to incomplete tracking of backend state, and GetPayload will never fill other backends due to the inefficiency of the existing backend framework.
The filesystem backend does not cache any state in memory, which makes requests for individual payloads less efficient than if it cached a mapping of cache payload key to raw hash after the first request for a cache key.
The HTTP, S3, and pak file backends are not implemented for the new interface.
The backends do not implement ICacheStore::CancelAll() because the existing backend framework provides WaitForQuiescence to wait for completion of async requests, and the implementation of ICacheStore by those backends works with that mechanism.
The non-leaf backends (hierarchical, async put, etc.) do not update stats from the ICacheStore functions.
#rb Zousar.Shaker
#rnx
#preflight 60899f35d324590001b47517
[CL 16148296 by Devin Doucette in ue5-main branch]
Add queued work priority support to auto delete async tasks and schedule DDC Puts as Low priority
ThreadPool threads are now honoring the names they've been given on creation
Move the I/O only async DDC Get into the DDC ThreadPool with higher priority (Normal) than DCC Puts
#rb Devin.Doucette
[CL 15177897 by danny couture in ue5-main branch]
The async put backend now uses this new status to avoid calling CachedDataProbablyExists after every put, which has a high cost for certain backends.
#rb Zousar.Shaker
#fyi Joakim.Lindqvist, Stefan.Boberg
[CL 15000972 by Devin Doucette in ue5-main branch]
Defer backfill up to date check to the async put as it may be expensive in the case of a shared ddc for example
This brings performance in line with working with the shared ddc disabled when the local cache is up to date.
Loading Apollo_Terrain_Edit: ~3m -> ~1m40s - DDC Access ~1m10s -> 4s when using the shared ddc
#rb Andrew.Grant, Devin.Doucette
[CL 14528803 by Francis Hurteau in ue5-main branch]
Droped some debug logging to VeryVerbose
Set EngineTest back to regular DDC logging
#jira UE-92249 UE-92221
#rb swarm
[FYI] devin.doucette
#ROBOMERGE-SOURCE: CL 12954517 in //UE4/Release-4.25/... via CL 12954529 via CL 12958534
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v682-12900288)
[CL 12958578 by andrew grant in Main branch]
Temporarily turning on verbose DDC logging for EngineTest project
[FYI] zabir.hoque ben.ingram
#jira #rb na
#lockdown cristina.riveron
#ROBOMERGE-OWNER: andrew.grant
#ROBOMERGE-AUTHOR: andrew.grant
#ROBOMERGE-SOURCE: CL 12911373 in //UE4/Release-4.25/... via CL 12911375 via CL 12911433
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v682-12900288)
[CL 12911435 by andrew grant in Main branch]
- Use a GUID rather than machine ID for write tests for programs (ShaderCompilerWorker, UnrealPak) that spin up multiple instances.
- When creating missing files for read-tests check if a failure could have been due to another instance creating that path at the same time.
- Improved some logging of issues to make future diagnosis of issues easier.
#rb swarm
[at]ryan.durand [at]devin.doucette
#ROBOMERGE-SOURCE: CL 12629650 via CL 12631522 via CL 12631547 via CL 12631579 via CL 12631609 via CL 12631644
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v675-12543919)
[CL 12631701 by andrew grant in Main branch]
E.g.
'-ddc-local-missrate=50' simulates a 50% miss rate of keys on the local backend,
'-ddc-shared-misstypes=AnimSeq' simulates misses for any AnimSeq key. Use + to combine keys. E.g. AnimSeq+Audio
Memory DDC, FileSystemDDC and S3DDC support these options as do the classes that wrap other backends (e.g. AsyncPut).
#tests lots of warm and cold DDC
[at]ben.marsh [at]josh.engebretson [at]devin.doucette
#ROBOMERGE-SOURCE: CL 12458693 via CL 12462167 via CL 12464485 via CL 12464606
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v672-12450963)
[CL 12464717 by andrew grant in Main branch]
If a filesystem node is not available not prompt the user and optionally retry incase they need to mount a drive or start VPN
Fiilesystem nodes now perform a speed test using a selection of 'DDC sized' files to determine a classification (local, fast, ok, slow).
Add a new 'ConsiderSlowAt' property to the 'Filesystem' DDC node type. If latency to the node is >= this value then the node will be marked as slow which disables touch'ing and reduces file stats
Interface Changes
- Add the concept of a speed class to nodes
- Add GetName to nodes for better debugging / logging
- WouldCache query that allows caches to opt of of consideration early and avoid async tasks being created.
- Create a new 'FileBackedDerivedDataBackend' class that's the for the memory/boot backend and future classes
- TryToPrefetch interface functions for future use
Behavior Changes
- Moved parameter parsing into FileSysteDerivedDataBackend as things were getting out of hand
- FileSystemDerivedDataBackend now performs a speed test using 'DDC sized' files in separate directories and applies a classification
- Slow locations turn off touching of data on read
- Slow locations always return true for CachedDataProbablyExists. It's faster just to try to read and fail
- If the shared DDC is not available the user is prompted incase they need to mount it.
[at]ben.marsh [at]josh.engebretson
#rb swarm
#tests lots of PIE runs with / without this option
#ROBOMERGE-SOURCE: CL 12387516 via CL 12387517 via CL 12396622
#ROBOMERGE-BOT: (v671-12333473)
[CL 12396757 by andrew grant in Release-Engine-Staging branch]
Updating the ArrayView with new comparison operators to have greater replacement for what TArray provides.
#rb Marc.Audy, Steve.Robb
#ROBOMERGE-OWNER: nick.darnell
#ROBOMERGE-AUTHOR: nick.darnell
#ROBOMERGE-SOURCE: CL 11843381 via CL 11843463 via CL 11843492
#ROBOMERGE-BOT: (v656-11643781)
[CL 11879995 by nick darnell in Main branch]
#rnx
#rb none
#ROBOMERGE-SOURCE: CL 10869240 via CL 10869516 via CL 10869902
#ROBOMERGE-BOT: (v613-10869866)
[CL 10870584 by ryan durand in Main branch]
Multithreaded file compression in unrealpak CreatePak. Local testing shows 50% improvement.
Added compressed files to the DDC this doesn't improve performance when using Oodle Optimal2 but does improve when using Oodle Optimal3.
#test preflight switch builds.
Graeme.Thornton
#ROBOMERGE-AUTHOR: Daniel.Lamb
#ROBOMERGE-SOURCE: CL 8216871 via CL 8229351
#ROBOMERGE-BOT: (v401-8057353)
[CL 8230264 by bob tellez in Main branch]
