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Allow force enabling jemalloc on macOS
Twiddle our crates and Cargo configuration for activating jemalloc to achieve the following ideal developer experience: * --no-default-features unequivocally disables jemalloc, regardless of platform. * --features=jemalloc unequivocally enables jemalloc, regardless of platform. * --default-features chooses the best allocator for the platform: the system allocator on macOS and jemalloc on Linux. Since Cargo doesn't explicitly support target-specific features, the trick is to introduce a crate of indirection, as described in [0]. Here's how it works: * The `mz-prof`, `mz-prof-http`, and `mz-alloc` crates have a straightforward setup: they expose a `jemalloc` feature and conditionally enable or disable jemalloc features based on whether the `jemalloc` feature is provided or not. * The `mz-alloc-default` crate depends on the `mz-alloc` crate and enables the best features for the platform: `jemalloc` on Linux, and no additional features on macOS. You can think of this crate as unconditionally enabling the best allocator for the platform. * The `mz-environmentd` and `mz-clusterd` crates unlock the conditional behavior. Bothc crates: 1. depend on `mz-alloc-default` by default, and 2. expose a `jemalloc` feature that force enables the `mz-alloc/jemalloc` feature. The motivation for all of this is to allow macOS developers to enable jemalloc upon request, which is useful for certain kinds of testing. Alternative to #27041. Closes #27041. [0]: rust-lang/cargo#1197 (comment)
1 parent 6f4fccd commit 5047817

19 files changed

+205
-42
lines changed

‎.config/hakari.toml

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@@ -6,3 +6,8 @@ platforms = [
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"x86_64-apple-darwin",
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]
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exact-versions = true
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[final-excludes]
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third-party = [
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{ "name" = "tikv-jemalloc-sys" }
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]

‎Cargo.lock

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‎Cargo.toml

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@@ -3,6 +3,7 @@ members = [
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"src/adapter",
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"src/adapter-types",
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"src/alloc",
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"src/alloc-default",
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"src/arrow-util",
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"src/audit-log",
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"src/avro",

‎ci/test/lint-deps.sh

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@@ -24,19 +24,27 @@ set -euo pipefail
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. misc/shlib/shlib.bash
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# Explicitly name targets to check dependencies. We support Apple on ARM64 and x86_64 and Linux on x86_64.
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# The crates whose dependency graphs we want to lint.
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entrypoints=(
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mz-clusterd
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mz-environmentd
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)
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# Explicitly name targets to check dependencies. We support Apple and Linux on ARM64 and x86_64.
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targets=(
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aarch64-apple-darwin
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x86_64-apple-darwin
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aarch64-unknown-linux-gnu
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x86_64-unknown-linux-gnu
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)
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# List of crates to include in the dependency lint, including an explanation why they're listed.
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crates=(
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# Checks that the default allocator is jemalloc on supported platforms, but can
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# be disabled using --no-default-features
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# be disabled using --no-default-features or explicitly enabled with --features=jemalloc
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tikv_jemalloc_ctl
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tikv_jemallocator
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tikv_jemalloc_sys
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)
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rewrite=false
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# output if there is no dependency to any of the specified packages.
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for crate in "${crates[@]}"; do
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# Gather data for the current target, reverse lines, find the dependency hierarchy to the root, reverse lines.
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output=$(cargo tree --workspace --format ':{lib}:{f}' \
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output=$(cargo tree \
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$(printf -- "-p %s " "${entrypoints[@]}") \
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--format ':{lib}:{f}' \
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--prefix depth \
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--edges normal,build \
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--locked \
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if $rewrite; then
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deps > "$resources/$target-default"
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deps --no-default-features > "$resources/$target-no-default-features"
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deps --features jemalloc > "$resources/$target-jemalloc"
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else
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try diff "$resources/$target-default" <(deps)
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try diff "$resources/$target-no-default-features" <(deps --no-default-features)
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try diff "$resources/$target-jemalloc" <(deps --features jemalloc)
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fi
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done
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‎ci/test/lint-deps/aarch64-apple-darwin-jemalloc

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# generated by ci/test/lint-deps.sh -- see ci/test/lint-deps/README.md for details
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tikv_jemalloc_ctl
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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tikv_jemallocator
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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tikv_jemalloc_sys
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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4:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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3:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms (*)

‎ci/test/lint-deps/aarch64-unknown-linux-gnu-default

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# generated by ci/test/lint-deps.sh -- see ci/test/lint-deps/README.md for details
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tikv_jemalloc_ctl
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0::default,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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tikv_jemallocator
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0::default,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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tikv_jemalloc_sys
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0::default,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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4:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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3:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms (*)

‎ci/test/lint-deps/aarch64-unknown-linux-gnu-jemalloc

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# generated by ci/test/lint-deps.sh -- see ci/test/lint-deps/README.md for details
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tikv_jemalloc_ctl
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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tikv_jemallocator
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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tikv_jemalloc_sys
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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4:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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3:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms (*)

‎ci/test/lint-deps/aarch64-unknown-linux-gnu-no-default-features

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# generated by ci/test/lint-deps.sh -- see ci/test/lint-deps/README.md for details

‎ci/test/lint-deps/x86_64-apple-darwin-jemalloc

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# generated by ci/test/lint-deps.sh -- see ci/test/lint-deps/README.md for details
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tikv_jemalloc_ctl
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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tikv_jemallocator
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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tikv_jemalloc_sys
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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4:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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3:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms (*)

‎ci/test/lint-deps/x86_64-unknown-linux-gnu-default

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# generated by ci/test/lint-deps.sh -- see ci/test/lint-deps/README.md for details
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tikv_jemalloc_ctl
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0:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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1:mz_prof:default,jemalloc,tikv-jemalloc-ctl,workspace-hack
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0::default,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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tikv_jemallocator
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0:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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1:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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0::default,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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tikv_jemalloc_sys
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0::default,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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4:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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3:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms (*)

‎ci/test/lint-deps/x86_64-unknown-linux-gnu-jemalloc

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# generated by ci/test/lint-deps.sh -- see ci/test/lint-deps/README.md for details
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tikv_jemalloc_ctl
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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tikv_jemallocator
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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tikv_jemalloc_sys
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0::default,jemalloc,mz-alloc-default,tokio-console
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1:mz_alloc:default,jemalloc,tikv-jemallocator,workspace-hack
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2:mz_prof:jemalloc,tikv-jemalloc-ctl
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3:tikv_jemalloc_ctl:default,use_std
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4:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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2:tikv_jemallocator:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms
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3:tikv_jemalloc_sys:background_threads,background_threads_runtime_support,default,profiling,stats,unprefixed_malloc_on_supported_platforms (*)

‎src/alloc-default/Cargo.toml

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[package]
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name = "mz-alloc-default"
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description = "Activates the best default global memory allocator for the platform."
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version = "0.0.0"
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edition.workspace = true
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rust-version.workspace = true
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publish = false
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[lints]
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workspace = true
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[dependencies]
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mz-alloc = { path = "../alloc", default-features = false }
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workspace-hack = { version = "0.0.0", path = "../workspace-hack", optional = true }
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# We use jemalloc by default on non-macOS platforms, as benchmarks indicated it
17+
# outperforms the system allocator, while also providing heap profiles.
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#
19+
# However, on macOS, we default to the system allocator, as jemalloc is not well
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# supported on macOS [0][1][2]. The issues present as runaway latency on load
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# test workloads that are comfortably handled by the macOS system allocator.
22+
# Consider re-evaluating if jemalloc's macOS support improves.
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#
24+
# [0]: https://github.com/jemalloc/jemalloc/issues/26
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# [1]: https://github.com/jemalloc/jemalloc/issues/843
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# [2]: https://github.com/jemalloc/jemalloc/issues/1467
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#
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# Furthermore, as of August 2022, some engineers are using profiling tools, e.g.
29+
# `heaptrack`, that only work with the system allocator on macOS.
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[target.'cfg(not(target_os = "macos"))'.dependencies]
31+
mz-alloc = { path = "../alloc", features = ["jemalloc"] }
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[features]
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default = ["workspace-hack"]
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[package.metadata.cargo-udeps.ignore]
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normal = ["workspace-hack", "mz-alloc"]

‎src/alloc-default/src/lib.rs

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// Copyright Materialize, Inc. and contributors. All rights reserved.
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//
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// Use of this software is governed by the Business Source License
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// included in the LICENSE file.
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//
6+
// As of the Change Date specified in that file, in accordance with
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// the Business Source License, use of this software will be governed
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// by the Apache License, Version 2.0.
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//! Activates the best default global memory allocator for the platform.

‎src/alloc/Cargo.toml

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[package]
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name = "mz-alloc"
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description = "Activates the best memory allocator for the target platform."
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description = "Chooses a global memory allocator based on Cargo features."
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version = "0.0.0"
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edition.workspace = true
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rust-version.workspace = true
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1212
[dependencies]
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mz-ore = { path = "../ore", default-features = false }
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workspace-hack = { version = "0.0.0", path = "../workspace-hack", optional = true }
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# Disable jemalloc on macOS, as it is not well supported [0][1][2]. The issues
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# present as runaway latency on load test workloads that are comfortably handled
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# by the macOS system allocator. Consider re-evaluating if jemalloc's macOS
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# support improves.
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#
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# [0]: https://github.com/jemalloc/jemalloc/issues/26
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# [1]: https://github.com/jemalloc/jemalloc/issues/843
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# [2]: https://github.com/jemalloc/jemalloc/issues/1467
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#
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# Furthermore, as of August 2022, some engineers are using profiling tools, e.g.
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# `heaptrack`, that only work with the system allocator.
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[target.'cfg(not(target_os = "macos"))'.dependencies]
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mz-prof = { path = "../prof", default-features = false }
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mz-prof-http = { path = "../prof-http", default-features = false }
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# According to jemalloc developers, `background_threads` should always be
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#
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# See: https://github.com/jemalloc/jemalloc/issues/956#issuecomment-316224733
3622
tikv-jemallocator = { version = "0.5.0", features = ["profiling", "stats", "unprefixed_malloc_on_supported_platforms", "background_threads"], optional = true }
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workspace-hack = { version = "0.0.0", path = "../workspace-hack", optional = true }
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[features]
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default = ["workspace-hack"]
40-
# Whether to enable the use of jemalloc on platforms that support it.
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jemalloc = ["tikv-jemallocator", "mz-prof/jemalloc", "mz-prof-http/jemalloc"]
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# Whether to use jemalloc instead of the system allocator.
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jemalloc = ["tikv-jemallocator", "mz-prof-http/jemalloc"]
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[package.metadata.cargo-udeps.ignore]
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# The only reason we depend on mz-prof-http
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# from this package is so that we can force its `jemalloc`
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# option to be enabled when this package's is, which
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# makes all the Materialize binaries correctly
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# serve heap profiling tools at the `/prof` endpoints.
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# The only reason we depend on mz-prof-http from this package is so that we can
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# force its `jemalloc` option to be enabled when this package's is, which makes
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# all the Materialize binaries correctly serve heap profiling tools at the
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# `/prof` endpoints.
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‎src/alloc/src/lib.rs

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// the Business Source License, use of this software will be governed
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// by the Apache License, Version 2.0.
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//! Chooses a global memory allocator based on Cargo features.
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#[cfg(all(not(target_os = "macos"), feature = "jemalloc", not(miri)))]
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#[cfg(all(feature = "jemalloc", not(miri)))]
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#[global_allocator]
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static ALLOC: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
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/// Registers metrics for the global allocator into the provided registry.
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///
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/// What metrics are registered varies by platform. Not all platforms use
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#[cfg(any(target_os = "macos", not(feature = "jemalloc"), miri))]
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#[cfg(any(not(feature = "jemalloc"), miri))]
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#[allow(clippy::unused_async)]
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pub async fn register_metrics_into(_: &MetricsRegistry) {
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// No-op on platforms that don't use jemalloc.
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///
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/// What metrics are registered varies by platform. Not all platforms use
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#[cfg(all(not(target_os = "macos"), feature = "jemalloc", not(miri)))]
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#[cfg(all(feature = "jemalloc", not(miri)))]
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pub async fn register_metrics_into(registry: &MetricsRegistry) {
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mz_prof::jemalloc::JemallocMetrics::register_into(registry).await;
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}

‎src/clusterd/Cargo.toml

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fail = { version = "0.5.1", features = ["failpoints"] }
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futures = "0.3.25"
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mz-alloc = { path = "../alloc" }
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mz-alloc-default = { path = "../alloc-default", optional = true }
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mz-build-info = { path = "../build-info" }
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mz-cloud-resources = { path = "../cloud-resources" }
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mz-compute = { path = "../compute" }
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workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
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default = ["tokio-console", "jemalloc"]
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default = ["tokio-console", "mz-alloc-default"]
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jemalloc = ["mz-alloc/jemalloc"]
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tokio-console = ["mz-ore/tokio-console"]
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‎src/environmentd/Cargo.toml

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@@ -41,6 +41,7 @@ once_cell = "1.16.0"
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libc = "0.2.138"
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mime = "0.3.16"
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mz-alloc = { path = "../alloc" }
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mz-alloc-default = { path = "../alloc-default", optional = true }
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mz-aws-secrets-controller = { path = "../aws-secrets-controller" }
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mz-build-info = { path = "../build-info" }
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mz-adapter = { path = "../adapter" }
@@ -159,7 +160,7 @@ cc = "1.0.78"
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mz-npm = { path = "../npm" }
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[features]
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default = ["tokio-console", "jemalloc"]
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default = ["tokio-console", "mz-alloc-default"]
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# When enabled, static assets for the web UI are loaded from disk on every HTTP
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# request rather than compiled into the binary. This vastly speeds up the
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# iteration cycle when developing the web UI.

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