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storcon: use jemalloc (#10892)

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## Problem

We'd like to enable CPU/heap profiling for storcon. This requires
jemalloc.

## Summary of changes

Use jemalloc as the global allocator, and enable heap sampling for
profiling.
This commit is contained in:
Erik Grinaker
2025-02-19 15:20:51 +01:00
committed by GitHub
parent 0453eaf65c
commit 3720cf1c5a
3 changed files with 12 additions and 0 deletions
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10
storage_controller/src/main.rs
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@@ -27,6 +27,16 @@ use utils::{project_build_tag, project_git_version, tcp_listener};
project_git_version!(GIT_VERSION);
project_build_tag!(BUILD_TAG);
#[global_allocator]
static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
/// Configure jemalloc to profile heap allocations by sampling stack traces every 2 MB (1 << 21).
/// This adds roughly 3% overhead for allocations on average, which is acceptable considering
/// performance-sensitive code will avoid allocations as far as possible anyway.
#[allow(non_upper_case_globals)]
#[export_name = "malloc_conf"]
pub static malloc_conf: &[u8] = b"prof:true,prof_active:true,lg_prof_sample:21\0";
#[derive(Parser)]
#[command(author, version, about, long_about = None)]
#[command(arg_required_else_help(true))]