Merge pull request #399 from sched-ext/meson-serialize

meson: introduce serialize build option

README.md

@@ -264,6 +264,7 @@ options can be used in such cases.
 - 'cargo_home': 'CARGO_HOME env to use when invoking cargo'
 - `offline`: 'Compilation step should not access the internet'
 - `enable_rust`: 'Enable the build of rust sub-projects'
+- `serialize`: 'Enable/disable the sequential build of the schedulers. Set this to false if you need to build just one scheduler.'
 
 For example, let's say you want to use `bpftool` and `libbpf` shipped in the
 kernel tree located at `$KERNEL`. We need to build `bpftool` in the kernel

meson.build

@@ -12,6 +12,8 @@ cc = meson.get_compiler('c')
 
 enable_rust = get_option('enable_rust')
 
+serialize = get_option('serialize')
+
 bpf_clang = find_program(get_option('bpf_clang'))
 
 enable_stress = get_option('enable_stress')

meson.options

@@ -14,6 +14,8 @@ option('offline', type: 'boolean', value: 'false',
        description: 'Compilation step should not access the internet')
 option('enable_rust', type: 'boolean', value: 'true',
        description: 'Enable rust sub-projects')
+option('serialize', type: 'boolean', value: 'true',
+       description: 'Serialize the build of all schedulers')
 option('enable_stress', type: 'boolean', value: 'true',
        description: 'Enable stress tests')
 option('kernel', type: 'string', value: 'vmlinuz',

scheds/rust/scx_lavd/meson.build

@@ -1,8 +1,14 @@
+if serialize
+  sched_deps = [libbpf, bpftool_target, sched]
+else
+  sched_deps = [libbpf, bpftool_target]
+endif
+
 sched = custom_target('scx_lavd',
               output: '@PLAINNAME@.__PHONY__',
               input: 'Cargo.toml',
               command: [cargo, 'build', '--manifest-path=@INPUT@', '--target-dir=@OUTDIR@',
                         cargo_build_args],
               env: cargo_env,
-              depends: [sched],
+              depends: sched_deps,
               build_always_stale: true)

scheds/rust/scx_layered/meson.build

@@ -1,8 +1,14 @@
+if serialize
+  sched_deps = [libbpf, bpftool_target, sched]
+else
+  sched_deps = [libbpf, bpftool_target]
+endif
+
 sched = custom_target('scx_layered',
               output: '@PLAINNAME@.__PHONY__',
               input: 'Cargo.toml',
               command: [cargo, 'build', '--manifest-path=@INPUT@', '--target-dir=@OUTDIR@',
                         cargo_build_args],
               env: cargo_env,
-              depends: [libbpf, bpftool_target, sched],
+              depends: sched_deps,
               build_always_stale: true)

scheds/rust/scx_mitosis/meson.build

@@ -1,8 +1,14 @@
+if serialize
+  sched_deps = [libbpf, bpftool_target, sched]
+else
+  sched_deps = [libbpf, bpftool_target]
+endif
+
 sched = custom_target('scx_mitosis',
               output: '@PLAINNAME@.__PHONY__',
               input: 'Cargo.toml',
               command: [cargo, 'build', '--manifest-path=@INPUT@', '--target-dir=@OUTDIR@',
                         cargo_build_args],
               env: cargo_env,
-              depends: [libbpf, bpftool_target, sched],
+              depends: sched_deps,
               build_always_stale: true)

scheds/rust/scx_rlfifo/meson.build

@@ -1,8 +1,14 @@
+if serialize
+  sched_deps = [libbpf, bpftool_target, sched]
+else
+  sched_deps = [libbpf, bpftool_target]
+endif
+
 sched = custom_target('scx_rlfifo',
               output: '@PLAINNAME@.__PHONY__',
               input: 'Cargo.toml',
               command: [cargo, 'build', '--manifest-path=@INPUT@', '--target-dir=@OUTDIR@',
                         cargo_build_args],
               env: cargo_env,
-              depends: [libbpf, bpftool_target, sched],
+              depends: sched_deps,
               build_always_stale: true)

scheds/rust/scx_rustland/meson.build

@@ -1,8 +1,14 @@
+if serialize
+  sched_deps = [libbpf, bpftool_target, sched]
+else
+  sched_deps = [libbpf, bpftool_target]
+endif
+
 sched = custom_target('scx_rustland',
               output: '@PLAINNAME@.__PHONY__',
               input: 'Cargo.toml',
               command: [cargo, 'build', '--manifest-path=@INPUT@', '--target-dir=@OUTDIR@',
                         cargo_build_args],
               env: cargo_env,
-              depends: [libbpf, bpftool_target, sched],
+              depends: sched_deps,
               build_always_stale: true)

scheds/rust/scx_rusty/meson.build

@@ -1,8 +1,14 @@
+if serialize
+  sched_deps = [libbpf, bpftool_target, sched]
+else
+  sched_deps = [libbpf, bpftool_target]
+endif
+
 sched = custom_target('scx_rusty',
               output: '@PLAINNAME@.__PHONY__',
               input: 'Cargo.toml',
               command: [cargo, 'build', '--manifest-path=@INPUT@', '--target-dir=@OUTDIR@',
                         cargo_build_args],
               env: cargo_env,
-              depends: [libbpf, bpftool_target, sched],
+              depends: sched_deps,
               build_always_stale: true)