bench: Update the benchmark runner to gungraun 0.17

`iai-callgrind` was renamed to `gungraun` and had a new release. Update
everything to match.

There shouldn't be any functional changes here.

Author: tgross35

Cargo.toml

@@ -51,5 +51,5 @@ codegen-units = 1
 lto = "fat"
 
 [profile.bench]
-# Required for iai-callgrind
+# Required for gungraun
 debug = true

builtins-test/Cargo.toml

@@ -14,7 +14,7 @@ rand_xoshiro = "0.7"
 # To compare float builtins against
 rustc_apfloat = "0.2.3"
 # Really a dev dependency, but dev dependencies can't be optional
-iai-callgrind = { version = "0.15.2", optional = true }
+gungraun = { version = "0.17.0", optional = true }
 
 [dependencies.compiler_builtins]
 path = "../builtins-shim"
@@ -46,8 +46,8 @@ no-sys-f16-f64-convert = []
 # Skip tests that rely on f16 symbols being available on the system
 no-sys-f16 = ["no-sys-f16-f64-convert"]
 
-# Enable icount benchmarks (requires iai-callgrind and valgrind)
-icount = ["dep:iai-callgrind"]
+# Enable icount benchmarks (requires gungraun-runner and valgrind locally)
+icount = ["dep:gungraun"]
 
 # Enable report generation without bringing in more dependencies by default
 benchmarking-reports = ["criterion/plotters", "criterion/html_reports"]

builtins-test/benches/mem_icount.rs

@@ -1,11 +1,11 @@
-//! Benchmarks that use Callgrind (via `iai_callgrind`) to report instruction count metrics. This
+//! Benchmarks that use Callgrind (via `gungraun`) to report instruction count metrics. This
 //! is stable enough to be tested in CI.
 
 use std::hint::black_box;
 use std::{ops, slice};
 
 use compiler_builtins::mem::{memcmp, memcpy, memmove, memset};
-use iai_callgrind::{library_benchmark, library_benchmark_group, main};
+use gungraun::{library_benchmark, library_benchmark_group, main};
 
 const PAGE_SIZE: usize = 0x1000; // 4 kiB
 const MAX_ALIGN: usize = 512; // assume we may use avx512 operations one day

ci/bench-icount.sh

@@ -10,7 +10,7 @@ if [ -z "$target" ]; then
     target="$host_target"
 fi
 
-iai_home="iai-home"
+gungraun_home="iai-home"
 
 # Use the arch as a tag to disambiguate artifacts
 tag="$(echo "$target" | cut -d'-' -f1)"
@@ -26,19 +26,19 @@ function run_icount_benchmarks() {
         "--features" "unstable,unstable-float,icount"
     )
 
-    iai_args=(
-        "--home" "$(pwd)/$iai_home"
+    gungraun_args=(
+        "--home" "$(pwd)/$gungraun_home"
         "--callgrind-limits=ir=5.0"
         "--save-summary"
     )
 
-    # Parse `cargo_arg0 cargo_arg1 -- iai_arg0 iai_arg1` syntax
-    parsing_iai_args=0
+    # Parse `cargo_arg0 cargo_arg1 -- gungraun_arg0 gungraun_arg1` syntax
+    parsing_gungraun_args=0
     while [ "$#" -gt 0 ]; do
-        if [ "$parsing_iai_args" == "1" ]; then
-            iai_args+=("$1")
+        if [ "$parsing_gungraun_args" == "1" ]; then
+            gungraun_args+=("$1")
         elif [ "$1" == "--" ]; then
-            parsing_iai_args=1
+            parsing_gungraun_args=1
         else
             cargo_args+=("$1")
         fi
@@ -48,7 +48,7 @@ function run_icount_benchmarks() {
 
     # Run iai-callgrind benchmarks. Do this in a subshell with `&& true` to
     # capture rather than exit on error.
-    (cargo bench "${cargo_args[@]}" -- "${iai_args[@]}") && true
+    (cargo bench "${cargo_args[@]}" -- "${gungraun_args[@]}") && true
     exit_code="$?"
 
     if [ "$exit_code" -eq 0 ]; then
@@ -68,4 +68,4 @@ run_icount_benchmarks -- --save-baseline=hardfloat
 # Name and tar the new baseline
 name="baseline-icount-$tag-$(date -u +'%Y%m%d%H%M')-${GITHUB_SHA:0:12}"
 echo "BASELINE_NAME=$name" >>"$GITHUB_ENV"
-tar cJf "$name.tar.xz" "$iai_home"
+tar cJf "$name.tar.xz" "$gungraun_home"

libm-test/Cargo.toml

@@ -21,8 +21,8 @@ build-musl = ["dep:musl-math-sys"]
 # Enable report generation without bringing in more dependencies by default
 benchmarking-reports = ["criterion/plotters", "criterion/html_reports"]
 
-# Enable icount benchmarks (requires iai-callgrind and valgrind)
-icount = ["dep:iai-callgrind"]
+# Enable icount benchmarks (requires gungraun-runner and valgrind locally)
+icount = ["dep:gungraun"]
 
 # Run with a reduced set of benchmarks, such as for CI
 short-benchmarks = []
@@ -31,7 +31,7 @@ short-benchmarks = []
 anyhow = "1.0.98"
 # This is not directly used but is required so we can enable `gmp-mpfr-sys/force-cross`.
 gmp-mpfr-sys = { version = "1.6.5", optional = true, default-features = false }
-iai-callgrind = { version = "0.15.2", optional = true }
+gungraun = { version = "0.17.0", optional = true }
 indicatif = { version = "0.18.0", default-features = false }
 libm = { path = "../libm", features = ["unstable-public-internals"] }
 libm-macros = { path = "../crates/libm-macros" }

libm-test/benches/icount.rs

@@ -1,10 +1,10 @@
-//! Benchmarks that use `iai-cachegrind` to be reasonably CI-stable.
+//! Benchmarks that use `gungraun` to be reasonably CI-stable.
 #![feature(f16)]
 #![feature(f128)]
 
 use std::hint::black_box;
 
-use iai_callgrind::{library_benchmark, library_benchmark_group, main};
+use gungraun::{library_benchmark, library_benchmark_group, main};
 use libm::support::{HInt, Hexf, hf16, hf32, hf64, hf128, u256};
 use libm_test::generate::spaced;
 use libm_test::{CheckBasis, CheckCtx, GeneratorKind, MathOp, OpRustArgs, TupleCall, op};
@@ -156,7 +156,13 @@ fn icount_bench_u256_shr(cases: Vec<(u256, u32)>) {
 
 library_benchmark_group!(
     name = icount_bench_u128_group;
-    benchmarks = icount_bench_u128_widen_mul, icount_bench_u256_narrowing_div, icount_bench_u256_add, icount_bench_u256_sub, icount_bench_u256_shl, icount_bench_u256_shr
+    benchmarks =
+    icount_bench_u128_widen_mul,
+    icount_bench_u256_narrowing_div,
+    icount_bench_u256_add,
+    icount_bench_u256_sub,
+    icount_bench_u256_shl,
+    icount_bench_u256_shr
 );
 
 #[library_benchmark]