autobuild: add config option to set niceness

When the machine running the autobuilder is shared, it is important that the autobuilder instances do not hog all of the CPU.

Add an option to the configuration, so that the user can set the niceness to run the instances with. By default, the niceness is 0, which means the current niceness.

Properly doing so would require setting up a container with proper CPU cgroup, but it's a bit complicated.

Signed-off-by "Yann E. MORIN" <[email protected]>

---
 scripts/autobuild-run | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

scripts/autobuild-run +9 -1

index 76b7201..fb48950 100755
@@ -64,6 +64,7 @@ defaults = {
     '--njobs': '1',
     '--submitter': 'N/A',
     '--make-opts': '',
+    '--nice': 0,
 }
 
 doc = """autobuild-run - run Buildroot autobuilder

@@ -77,6 +78,8 @@ Options:
                                  Defaults to %(--ninstances)s.
   -j, --njobs NJOBS              number of parallel jobs
                                  Defaults to %(--njobs)s.
+  --nice N                       Niceness, positive number
+                                 No default.
   -s, --submitter SUBMITTER      name/machine of submitter
                                  Defaults to %(--submitter)s.
   --http-login LOGIN             username to send results with

@@ -101,6 +104,7 @@ Format of the configuration file:
    [main]
    ninstances = <value>
    njobs = <value>
+   nice = <value>
    http-login = <value>
    http-password = <value>
    submitter = <value>

@@ -540,6 +544,7 @@ def do_build(**kwargs):
 
     idir = "instance-%d" % kwargs['instance']
     log = kwargs['log']
+    nice = kwargs['nice']
 
     # We need the absolute path to use with O=, because the relative
     # path to the output directory here is not relative to the

@@ -551,7 +556,9 @@ def do_build(**kwargs):
     f = open(os.path.join(outputdir, "logfile"), "w+")
     log_write(log, "INFO: build started")
 
-    cmd = ["timeout", str(MAX_DURATION), "make", "O=%s" % outputdir,
+    cmd = ["timeout", str(MAX_DURATION),
+            "nice", "-n", nice,
+            "make", "O=%s" % outputdir,
             "-C", srcdir, "BR2_DL_DIR=%s" % dldir,
             "BR2_JLEVEL=%s" % kwargs['njobs']] \
           + kwargs['make_opts'].split()

@@ -851,6 +858,7 @@ def main():
                 http_password = args['--http-password'],
                 submitter = args['--submitter'],
                 make_opts = (args['--make-opts'] or ''),
+                nice = (args['--nice'] or 0),
                 upload = upload,
                 buildpid = buildpid
             ))

Signature · 1 line

1.9.1