[perf] Test mimalloc 3.1.5 #147583

umbrageodotus · 2025-10-11T10:52:02Z

(test for #147583 - message copy pasted and adapted from mimalloc 2.x test)

Last times we tried mimalloc:

We were comparing to a different release of jemalloc
The 1.x version of mimalloc had interesting performance characteristics but max-rss regressions, that were supposed to be fixed in 2.x (spoiler: weren't), which was apparently in beta at the time.
We'd like to have more up-to-date numbers for comparison. (My expectations: some perf improvements, but only non-significant max-rss regressions, unlike last time)

rustbot · 2025-10-11T10:52:05Z

These commits modify the Cargo.lock file. Unintentional changes to Cargo.lock can be introduced when switching branches and rebasing PRs.

If this was unintentional then you should revert the changes before this PR is merged.
Otherwise, you can ignore this comment.

rustbot · 2025-10-11T10:52:07Z

Noratrieb is not on the review rotation at the moment.
They may take a while to respond.

Kobzol · 2025-10-11T10:53:57Z

@bors try @rust-timer queue

rust-timer · 2025-10-11T10:53:59Z

Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

[perf] Test mimalloc 3.1.5

umbrageodotus · 2025-10-11T10:54:17Z

Do NOT merge this, I didn't even change the feature names. Just a bench.

Kobzol · 2025-10-11T10:55:27Z

Yup, that's what I started :)

umbrageodotus · 2025-10-11T10:56:25Z

Yup, that's what I started :)

Mhm! Just wanted to make it very clear.

umbrageodotus · 2025-10-11T10:57:27Z

@Kobzol well... tidy most likely won't work; why? I think I forgot to add make and stuff...

Kobzol · 2025-10-11T10:58:46Z

feature jemalloc includes dep:tikv-jemalloc-sys, but tikv-jemalloc-sys is not listed as a dependency

The features have to be fixed.

umbrageodotus · 2025-10-11T11:00:03Z

@Kobzol Bright minds think alike, huh? ...maybe it's people who can read and comprehend english and basic programming (aka. me!) but who knows :P

umbrageodotus · 2025-10-11T11:03:19Z

?r @Kobzol

umbrageodotus · 2025-10-11T11:03:38Z

@Kobzol Could you run bors again? I think everything is correct now.

Kobzol · 2025-10-11T11:04:33Z

I'll start it once the PR jobs are green or made enough progress.

rust-bors · 2025-10-11T11:05:02Z

💔 Test for 1b28ff3 failed: CI

Kobzol · 2025-10-11T11:10:01Z

@bors try

[perf] Test mimalloc 3.1.5

rustbot · 2025-10-11T11:10:35Z

The list of allowed third-party dependencies may have been modified! You must ensure that any new dependencies have compatible licenses before merging.

cc @davidtwco, @wesleywiser

umbrageodotus · 2025-10-11T11:10:53Z

@Kobzol I fixed tidy.

rust-bors · 2025-10-11T11:59:15Z

💔 Test for 556be92 failed: CI. Failed jobs:

try - dist-x86_64-linux (web logs, extended logs)

bjorn3 · 2025-10-11T12:22:26Z

Cargo.lock

+checksum = "667f4fec20f29dfc6bc7357c582d91796c169ad7e2fce709468aefeb2c099870"
+dependencies = [
+ "cc",
+ "cty",


Looks like this dependency is used for c_char, c_int, c_long and c_ulonglong, which are all provided by core::ffi nowadays.

@bjorn3 as this is a test, im js gonna allow the dep

umbrageodotus · 2025-10-11T13:10:48Z

@bors try

rust-bors · 2025-10-11T13:10:50Z

@umbrageodotus: 🔑 Insufficient privileges: not in try users

umbrageodotus · 2025-10-11T13:11:15Z

@Kobzol Could you "@bors try"? It passed tidy, so...

Kobzol · 2025-10-11T13:11:47Z

@bors try

[perf] Test mimalloc 3.1.5

rust-log-analyzer · 2025-10-11T14:02:39Z

The job dist-x86_64-linux failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

    Finished `dev` profile [unoptimized + debuginfo] target(s) in 31.08s
##[endgroup]
[2025-10-11T13:25:48.803Z INFO  opt_dist::timer] Section `Stage 1 (Rustc PGO)` starts
[2025-10-11T13:25:48.803Z INFO  opt_dist::timer] Section `Stage 1 (Rustc PGO) > Build PGO instrumented rustc and LLVM` starts
[2025-10-11T13:25:48.803Z INFO  opt_dist::exec] Executing `RUST_BACKTRACE=full python3 /checkout/x.py build --target x86_64-unknown-linux-gnu --host x86_64-unknown-linux-gnu --stage 2 library/std --set rust.llvm-bitcode-linker=false --set build.extended=false --set rust.codegen-backends=['llvm'] --set rust.deny-warnings=false --rust-profile-generate /tmp/tmp-multistage/opt-artifacts/rustc-pgo --set llvm.thin-lto=false --set llvm.link-shared=true [at /checkout/obj]`
##[group]Building bootstrap
    Finished `dev` profile [unoptimized] target(s) in 0.06s
##[endgroup]
[TIMING:start] compile::Assemble { target_compiler: Compiler { stage: 2, host: x86_64-unknown-linux-gnu, forced_compiler: false } }
[TIMING:start] builder::Libdir { compiler: Compiler { stage: 2, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu }
---
[2025-10-11T13:51:32.336Z INFO  opt_dist::utils::io] Deleting directory `/tmp/tmp-multistage/opt-artifacts/rustc-pgo`
[2025-10-11T13:51:35.678Z INFO  opt_dist::timer] Section `Stage 1 (Rustc PGO) > Gather profiles` ended: OK (598.42s)`
[2025-10-11T13:51:35.678Z INFO  opt_dist::utils] Free disk space: 1.24 TiB out of total 2.18 TiB (43.16% used)
[2025-10-11T13:51:35.678Z INFO  opt_dist::timer] Section `Stage 1 (Rustc PGO) > Build PGO optimized rustc` starts
[2025-10-11T13:51:35.678Z INFO  opt_dist::exec] Executing `RUST_BACKTRACE=full python3 /checkout/x.py build --target x86_64-unknown-linux-gnu --host x86_64-unknown-linux-gnu --stage 2 library/std --set rust.llvm-bitcode-linker=false --set build.extended=false --set rust.codegen-backends=['llvm'] --set rust.deny-warnings=false --rust-profile-use /tmp/tmp-multistage/opt-artifacts/rustc-pgo.profdata --enable-bolt-settings [at /checkout/obj]`
##[group]Building bootstrap
    Finished `dev` profile [unoptimized] target(s) in 0.27s
##[endgroup]
[TIMING:start] compile::Assemble { target_compiler: Compiler { stage: 2, host: x86_64-unknown-linux-gnu, forced_compiler: false } }
[TIMING:start] builder::Libdir { compiler: Compiler { stage: 2, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu }
---
[2025-10-11T13:57:12.507Z INFO  opt_dist::utils] Clearing LLVM build files
[2025-10-11T13:57:12.507Z INFO  opt_dist::utils::io] Deleting directory `/checkout/obj/build/x86_64-unknown-linux-gnu/llvm`
[2025-10-11T13:57:13.677Z INFO  opt_dist::utils::io] Deleting directory `/checkout/obj/build/x86_64-unknown-linux-gnu/lld`
[2025-10-11T13:57:13.713Z INFO  opt_dist::timer] Section `Stage 2 (LLVM PGO) > Build PGO instrumented LLVM` starts
[2025-10-11T13:57:13.713Z INFO  opt_dist::exec] Executing `LLVM_PROFILE_DIR=/tmp/tmp-multistage/opt-artifacts/llvm-pgo/prof-%p RUST_BACKTRACE=full python3 /checkout/x.py build --target x86_64-unknown-linux-gnu --host x86_64-unknown-linux-gnu --stage 2 library/std --set rust.llvm-bitcode-linker=false --set build.extended=false --set rust.codegen-backends=['llvm'] --set rust.deny-warnings=false --llvm-profile-generate --keep-stage 0 --keep-stage 1 [at /checkout/obj]`
##[group]Building bootstrap
    Finished `dev` profile [unoptimized] target(s) in 0.07s
##[endgroup]
[TIMING:start] compile::Assemble { target_compiler: Compiler { stage: 2, host: x86_64-unknown-linux-gnu, forced_compiler: false } }
[TIMING:start] builder::Libdir { compiler: Compiler { stage: 2, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu }
---
Running with 1 job(s)
collector error: Cannot find libdir for rustc

Caused by:
    rustc failed to provide sysroot, exit status: signal: 11 (SIGSEGV) (core dumped)
    stderr: 

Stack backtrace:
   0: anyhow::error::<impl anyhow::Error>::msg
             at /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
---
   7: std::sys::backtrace::__rust_begin_short_backtrace
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:158:18
   8: std::rt::lang_start::{{closure}}
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/rt.rs:206:18
   9: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:287:21
  10: std::panicking::catch_unwind::do_call
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
  11: std::panicking::catch_unwind
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
---
    0: Cannot gather LLVM PGO profiles
    1: Command RUSTC=/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/rustc RUSTC_BOOTSTRAP=1 /checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo run -p collector --bin collector -- profile_local eprintln /checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc --id Test --cargo /checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo --profiles Debug,Opt --scenarios Full --exact-match syn-2.0.101,cargo-0.87.1,serde-1.0.219,ripgrep-14.1.1,regex-automata-0.4.8,clap_derive-4.5.32,hyper-1.6.0 [at /tmp/tmp-multistage/opt-artifacts/rustc-perf] has failed with exit code Some(1)

Stack backtrace:
   0: <anyhow::Error>::msg::<alloc::string::String>
             at /rust/deps/anyhow-1.0.99/src/backtrace.rs:27:14
   1: <opt_dist::exec::CmdBuilder>::run
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/exec.rs:80:17
   2: opt_dist::training::gather_llvm_profiles::{closure#0}
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/training.rs:123:30
   3: opt_dist::utils::with_log_group::<opt_dist::training::gather_llvm_profiles::{closure#0}, core::result::Result<(), anyhow::Error>>
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/utils/mod.rs:68:22
   4: opt_dist::training::gather_llvm_profiles
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/training.rs:122:5
   5: opt_dist::execute_pipeline::{closure#2}::{closure#1}
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/main.rs:293:17
   6: <opt_dist::timer::TimerSection>::section::<opt_dist::execute_pipeline::{closure#2}::{closure#1}, opt_dist::training::LlvmPGOProfile>
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/timer.rs:111:22
   7: opt_dist::execute_pipeline::{closure#2}
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/main.rs:292:33
   8: <opt_dist::timer::TimerSection>::section::<opt_dist::execute_pipeline::{closure#2}, core::option::Option<opt_dist::training::LlvmPGOProfile>>
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/timer.rs:111:22
   9: opt_dist::execute_pipeline
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/main.rs:279:15
  10: opt_dist::main
             at /rustc/c15b50cd29a9e31550dbbb2375b2fedf46fa00c2/src/tools/opt-dist/src/main.rs:467:18
  11: <fn() -> core::result::Result<(), anyhow::Error> as core::ops::function::FnOnce<()>>::call_once
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5
  12: std::sys::backtrace::__rust_begin_short_backtrace::<fn() -> core::result::Result<(), anyhow::Error>, core::result::Result<(), anyhow::Error>>
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:158:18
  13: std::rt::lang_start::<core::result::Result<(), anyhow::Error>>::{closure#0}
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/rt.rs:206:18
  14: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:287:21
  15: std::panicking::catch_unwind::do_call
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
  16: std::panicking::catch_unwind
             at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19

rust-bors · 2025-10-11T14:02:48Z

💔 Test for c15b50c failed: CI. Failed jobs:

try - dist-x86_64-linux (web logs, extended logs)

[perf] Test mimalloc 3.1.5

11df471

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. labels Oct 11, 2025

rustbot assigned Noratrieb Oct 11, 2025