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Configure memory, 32-bit WAL. (#170)

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This commit is contained in:
Nuno Cruces
2024-10-17 13:04:23 +01:00
committed by GitHub
parent 50c8517603
commit c900889848
21 changed files with 47 additions and 83 deletions
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8
vfs/README.md
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@@ -46,18 +46,14 @@ to check if your build supports file locking.
### Write-Ahead Logging
On 64-bit little-endian Unix, this module uses `mmap` to implement
On little-endian Unix, this module uses `mmap` to implement
[shared-memory for the WAL-index](https://sqlite.org/wal.html#implementation_of_shared_memory_for_the_wal_index),
like SQLite.
To allow `mmap` to work, each connection needs to reserve up to 4GB of address space.
To limit the address space each connection reserves,
use [`WithMemoryLimitPages`](../tests/testcfg/testcfg.go).
With [BSD locks](https://man.freebsd.org/cgi/man.cgi?query=flock&sektion=2)
a WAL database can only be accessed by a single proccess.
Other processes that attempt to access a database locked with BSD locks,
will fail with the `SQLITE_PROTOCOL` error code.
will fail with the [`SQLITE_PROTOCOL`](https://sqlite.org/rescode.html#protocol) error code.
Otherwise, [WAL support is limited](https://sqlite.org/wal.html#noshm),
and `EXCLUSIVE` locking mode must be set to create, read, and write WAL databases.

4
vfs/os_f2fs_linux.go
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@@ -1,4 +1,4 @@
//go:build (amd64 || arm64 || riscv64 || ppc64le) && !sqlite3_nosys
//go:build (amd64 || arm64 || riscv64) && !sqlite3_nosys
package vfs
@@ -13,7 +13,7 @@ const (
_F2FS_IOC_START_ATOMIC_WRITE = 62721
_F2FS_IOC_COMMIT_ATOMIC_WRITE = 62722
_F2FS_IOC_ABORT_ATOMIC_WRITE = 62725
_F2FS_IOC_GET_FEATURES = 2147808524
_F2FS_IOC_GET_FEATURES = 2147808524 // -2147158772
_F2FS_FEATURE_ATOMIC_WRITE = 4
)

2
vfs/os_std_atomic.go
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@@ -1,4 +1,4 @@
//go:build !linux || !(amd64 || arm64 || riscv64 || ppc64le) || sqlite3_nosys
//go:build !linux || !(amd64 || arm64 || riscv64) || sqlite3_nosys
package vfs

2
vfs/shm.go
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@@ -1,4 +1,4 @@
//go:build (darwin || linux) && (amd64 || arm64 || riscv64 || ppc64le) && !(sqlite3_flock || sqlite3_noshm || sqlite3_nosys)
//go:build (darwin || linux) && (386 || arm || amd64 || arm64 || riscv64 || ppc64le) && !(sqlite3_flock || sqlite3_noshm || sqlite3_nosys)
package vfs

2
vfs/shm_bsd.go
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@@ -1,4 +1,4 @@
//go:build (freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && (amd64 || arm64 || riscv64 || ppc64le) && !(sqlite3_noshm || sqlite3_nosys)
//go:build (freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && (386 || arm || amd64 || arm64 || riscv64 || ppc64le) && !(sqlite3_noshm || sqlite3_nosys)
package vfs

2
vfs/shm_other.go
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@@ -1,4 +1,4 @@
//go:build !(darwin || linux || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) || !(amd64 || arm64 || riscv64 || ppc64le) || sqlite3_noshm || sqlite3_nosys
//go:build !(darwin || linux || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) || !(386 || arm || amd64 || arm64 || riscv64 || ppc64le) || sqlite3_noshm || sqlite3_nosys
package vfs

3
vfs/tests/mptest/mptest_test.go
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@@ -43,10 +43,9 @@ func TestMain(m *testing.M) {
ctx := context.Background()
cfg := wazero.NewRuntimeConfig().
WithCoreFeatures(api.CoreFeaturesV2 | experimental.CoreFeaturesThreads).
WithMemoryLimitPages(1024)
WithMemoryLimitPages(512)
rt = wazero.NewRuntimeWithConfig(ctx, cfg)
wasi_snapshot_preview1.MustInstantiate(ctx, rt)
env := vfs.ExportHostFunctions(rt.NewHostModuleBuilder("env"))
env.NewFunctionBuilder().WithFunc(system).Export("system")
_, err := env.Instantiate(ctx)

3
vfs/tests/speedtest1/speedtest1_test.go
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@@ -42,7 +42,8 @@ func TestMain(m *testing.M) {
ctx := context.Background()
cfg := wazero.NewRuntimeConfig().
WithCoreFeatures(api.CoreFeaturesV2 | experimental.CoreFeaturesThreads)
WithCoreFeatures(api.CoreFeaturesV2 | experimental.CoreFeaturesThreads).
WithMemoryLimitPages(512)
rt = wazero.NewRuntimeWithConfig(ctx, cfg)
wasi_snapshot_preview1.MustInstantiate(ctx, rt)
env := vfs.ExportHostFunctions(rt.NewHostModuleBuilder("env"))