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build: adjust max_rss on a per-CI-host basis

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This avoids pessimizing concurrency on all machines due to e.g. the macOS
machine having high memory usage across the board due to 16K page size.
This commit is contained in:
Alex Rønne Petersen 2025-12-03 01:06:31 +01:00
parent e2e64fd9c4
commit fa0b57202c
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2 changed files with 116 additions and 5 deletions
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1
.forgejo/workflows/ci.yaml
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@ -5,6 +5,7 @@ on:
push:
branches:
- master
- max-rss-tuning
workflow_dispatch:
concurrency:

120
build.zig
View file

@ -459,8 +459,29 @@ pub fn build(b: *std.Build) !void {
.skip_linux = skip_linux,
.skip_llvm = skip_llvm,
.skip_libc = skip_libc,
// 3888779264 was observed on an x86_64-linux-gnu host.
.max_rss = 4000000000,
.max_rss = switch (b.graph.host.result.os.tag) {
.freebsd => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 1, // TODO
else => 0,
},
.linux => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 659809075,
.loongarch64 => 598902374,
.riscv64 => 1, // TODO
.s390x => 580596121,
.x86_64 => 3290894745,
else => 0,
},
.macos => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 767736217,
else => 0,
},
.windows => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 603070054,
else => 0,
},
else => 0,
},
}));
test_modules_step.dependOn(tests.addModuleTests(b, .{
@ -483,6 +504,29 @@ pub fn build(b: *std.Build) !void {
.skip_llvm = skip_llvm,
.skip_libc = true,
.no_builtin = true,
.max_rss = switch (b.graph.host.result.os.tag) {
.freebsd => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 1, // TODO
else => 0,
},
.linux => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 639565414,
.loongarch64 => 598884352,
.riscv64 => 1, // TODO
.s390x => 574166630,
.x86_64 => 764861644,
else => 0,
},
.macos => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 701413785,
else => 0,
},
.windows => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 536414208,
else => 0,
},
else => 0,
},
}));
test_modules_step.dependOn(tests.addModuleTests(b, .{
@ -505,6 +549,29 @@ pub fn build(b: *std.Build) !void {
.skip_llvm = skip_llvm,
.skip_libc = true,
.no_builtin = true,
.max_rss = switch (b.graph.host.result.os.tag) {
.freebsd => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 1, // TODO
else => 0,
},
.linux => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 615302758,
.loongarch64 => 598974464,
.riscv64 => 1, // TODO
.s390x => 395555635,
.x86_64 => 528128409,
else => 0,
},
.macos => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 451389030,
else => 0,
},
.windows => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 317852057,
else => 0,
},
else => 0,
},
}));
test_modules_step.dependOn(tests.addModuleTests(b, .{
@ -526,8 +593,29 @@ pub fn build(b: *std.Build) !void {
.skip_linux = skip_linux,
.skip_llvm = skip_llvm,
.skip_libc = skip_libc,
// I observed a value of 5605064704 on the M2 CI.
.max_rss = 6165571174,
.max_rss = switch (b.graph.host.result.os.tag) {
.freebsd => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 1, // TODO
else => 0,
},
.linux => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 6732817203,
.loongarch64 => 3216349593,
.riscv64 => 1, // TODO
.s390x => 3652514201,
.x86_64 => 5554053120,
else => 0,
},
.macos => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 8273795481,
else => 0,
},
.windows => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 3750236160,
else => 0,
},
else => 0,
},
}));
const unit_tests_step = b.step("test-unit", "Run the compiler source unit tests");
@ -721,7 +809,29 @@ fn addCompilerMod(b: *std.Build, options: AddCompilerModOptions) *std.Build.Modu
fn addCompilerStep(b: *std.Build, options: AddCompilerModOptions) *std.Build.Step.Compile {
const exe = b.addExecutable(.{
.name = "zig",
.max_rss = 7_800_000_000,
.max_rss = switch (b.graph.host.result.os.tag) {
.freebsd => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 1, // TODO
else => 0,
},
.linux => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 6240805683,
.loongarch64 => 5024158515,
.riscv64 => 1, // TODO
.s390x => 4997174476,
.x86_64 => 5486090649,
else => 0,
},
.macos => switch (b.graph.host.result.cpu.arch) {
.aarch64 => 6639145779,
else => 0,
},
.windows => switch (b.graph.host.result.cpu.arch) {
.x86_64 => 5770394009,
else => 0,
},
else => 0,
},
.root_module = addCompilerMod(b, options),
});
exe.stack_size = stack_size;