kyle
2f9d3d97e6
Dixie is capped (max_inflight 2, queue_depth 8, queue_wait 20s) and never queued on llama-server. Streaming chat, thinking off, 45s fallback to clean. Digest and chunk-embedding caches are content-addressed SQLite (Honcho context is not cached). Recover uses the guarded Fetcher. guardian-star is refused in code.
52 lines
2.0 KiB
Go
52 lines
2.0 KiB
Go
// Copyright 2026 The Memory Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package memory // import "modernc.org/memory"
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// canDecommit gates the decommit policy: pooled regions past the hot window
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// hand their pages back to the OS.
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const canDecommit = true
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// decommit returns the physical pages and the commit charge backing the empty
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// region at p to the OS without releasing the address reservation - the
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// windows analogue of the unix madvise(MADV_DONTNEED) path. Returning the
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// commit charge matters more here than the working set: Windows does not
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// overcommit, so a drained pool that stayed committed would hold
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// pagefile-backed commit against the machine-global limit for as long as it
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// is retained.
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//
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// The first OS page stays committed because it carries the page header.
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// Unlike MADV_DONTNEED'ed pages, MEM_DECOMMIT'ed pages fault on touch instead
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// of soft-faulting zeroes, so the reuse path recommits them via recommit
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// before the region is handed out; the pool's cold watermark is what knows
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// when that is needed.
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//
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// A failed VirtualFree leaves the pages committed, which is safe: the region
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// is merely counted as decommitted, and recommit of already-committed pages
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// succeeds and preserves them.
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func decommit(p uintptr, size int) {
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if size <= osPageSize {
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return
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}
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procVirtualFree.Call(p+uintptr(osPageSize), uintptr(size-osPageSize), _MEM_DECOMMIT)
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}
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// recommit commits, zero-filled, the pages decommit returned, making a region
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// popped from the pool's decommitted prefix usable again. It can fail when
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// the machine is out of commit; the caller then leaves the pool untouched and
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// reports the failure.
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func recommit(p uintptr, size int) error {
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if size <= osPageSize {
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return nil
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}
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addr, _, err := procVirtualAlloc.Call(p+uintptr(osPageSize), uintptr(size-osPageSize), _MEM_COMMIT, _PAGE_READWRITE)
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if addr == 0 {
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return err
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}
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return nil
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}
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