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restrict # "cpus" to # threads #1234

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9472293
restrict # "cpus" to # threads
baltzell Apr 29, 2026
a3474a7
add --cpus argument
baltzell Apr 30, 2026
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31 changes: 21 additions & 10 deletions libexec/scaling
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Original file line number Diff line number Diff line change
Expand Up @@ -7,21 +7,30 @@ def cli():
cli.add_argument('-c','--clara', metavar='DIR',help='CLARA_HOME path (default=$CLARA_HOME)',default=os.getenv('CLARA_HOME',None))
cli.add_argument('-t','--threads',metavar='#',help='threads (default=4,8)',default='4,8')
cli.add_argument('-e','--events', metavar='#',help='events per thread (default=555)',default=555,type=int)
cli.add_argument('-N','--numa', metavar='#',help='NUMA socket (default=None, choices=[0,1])',default=None,type=int,choices=[0,1])
cli.add_argument('-N','--numa', metavar='#',help='restrict to a NUMA socket (choices=[0,1])',default=None,type=int,choices=[0,1])
cli.add_argument('-C','--cpus', metavar='#',help='restrict to a CPU list (e.g. 0,1)',default=None)
cli.add_argument('datafile', help='input EVIO/HIPO data file')
cfg = cli.parse_args()
cfg.threads = cfg.threads.split(',')
if cfg.cpus is not None:
try:
cfg.cpus = ','.join([str(int(i)) for i in cfg.cpus.split(',')])
except Exception as e:
cli.error('invalid --cpus argument: {cfg.cpus}')
if cfg.numa is not None:
import warnings
warnings.warn('ignoring --numa argument, --cpus takes precedence')
elif cfg.numa is not None:
if not shutil.which('numactl'):
cli.error('numactl is not in $PATH, --numa option not supported')
cfg.numa = list(get_numa_cpus(cfg.numa))
if len(cfg.numa) == 0:
cli.error('invalid --numa node: {cfg.numa}')
if not cfg.clara:
cli.error('cannot find CLARA installation via -c or $CLARA_HOME')
cfg.run_clara = find_run_clara(cfg.clara)
if not cfg.run_clara:
cli.error('cannot find run-clara in $PATH or CLARA installation')
if cfg.numa is not None:
if not shutil.which('numactl'):
cli.error('numactl is not in $PATH, --numa option not supported')
if len(list(get_numa_cpus(cfg.numa))) == 0:
cli.error('invalid --numa node: {cfg.numa}')
cfg.numa = ','.join(list(get_numa_cpus(cfg.numa)))
return cfg

def find_run_clara(clara_home):
Expand Down Expand Up @@ -52,9 +61,11 @@ def run(cmd):
def benchmark(cfg, threads, log):
import collections
cmd = []
# use taskset:
if cfg.numa is not None:
cmd.extend(['taskset','-c',cfg.numa])
# use taskset for thread affinity:
if cfg.cpus is not None:
cmd.extend(['taskset','-c',cfg.cpus])
elif cfg.numa is not None:
cmd.extend(['taskset','-c',','.join(cfg.numa[:int(threads)])])
# add the run-clara command:
cmd.extend([cfg.run_clara,
'-c',cfg.clara,
Expand Down