Created
February 27, 2019 12:59
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Set CPU affinity and IRQ stuff for moloch-capture with python3 and python-psutil
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| #!/usr/bin/env python3 | |
| import psutil | |
| import subprocess | |
| import re | |
| import sys | |
| import os.path | |
| def get_moloch_capture_parent(): | |
| procs = {p.pid: p.info for p in psutil.process_iter(attrs=['pid', 'name', 'username'])} | |
| parent = {k: v for k, v in procs.items() if "moloch-capture" in v["name"]} | |
| parent = list(parent.values())[0]["pid"] | |
| parent = psutil.Process(pid=parent) | |
| return parent | |
| def get_moloch_workers(parent): | |
| workers = parent.threads() | |
| workers = [w.id for w in workers] | |
| workers = [psutil.Process(pid=p) for p in workers] | |
| workers = [{"pid": p.pid, "name": p.name()} for p in workers] | |
| return workers | |
| def get_numa_cores(node): | |
| numa = subprocess.run(['numactl', '--hardware'], stdout=subprocess.PIPE).stdout.decode('utf-8') | |
| numa = numa.split("\n") | |
| numa = [v.split(":")[1].strip() for v in numa if "node {} cpus:".format(NODE) in v][0] | |
| numa = numa.split() | |
| numa = [int(v) for v in numa] | |
| return numa | |
| NODE=1 | |
| CAP_IFACE="enp130s0f1" | |
| if __name__ == "__main__": | |
| numa = get_numa_cores(NODE) | |
| intr_thread = numa[0] | |
| cap_thread = numa[1] | |
| worker_threads = numa[2:] | |
| cap_pattern = re.compile("^moloch-(?:capture|simple|af\d+-\d+)$") | |
| pkt_pattern = re.compile("^moloch-pkt\d+$") | |
| parent = get_moloch_capture_parent() | |
| workers = get_moloch_workers(parent) | |
| cap_threads = [t for t in workers if cap_pattern.match(t["name"])] | |
| pkt_threads = [t for t in workers if pkt_pattern.match(t["name"])] | |
| if len(pkt_threads) > len(worker_threads): | |
| print("Too many moloch workers for {} cpu threads".format(len(worker_threads))) | |
| sys.exit(1) | |
| for thread in cap_threads: | |
| subprocess.call(['sudo', 'taskset', '-pc', str(cap_thread), str(thread["pid"])]) | |
| for i, thread in enumerate(pkt_threads): | |
| subprocess.call(['sudo', 'taskset', '-pc', str(worker_threads[i]), str(thread["pid"])]) | |
| lines = [] | |
| with open("/proc/interrupts", "rb") as f: | |
| lines = [l.decode().split(":")[0].lstrip() for l in f if CAP_IFACE in l.decode()] | |
| if len(lines) == 0 or len(lines) > 1: | |
| print("found {} irq for {}, should be 1".format(len(lines), CAP_IFACE)) | |
| sys.exit(1) | |
| irq = lines[0] | |
| irq = os.path.join('/proc/irq', str(irq), 'smp_affinity_list') | |
| subprocess.Popen(['/usr/bin/sudo /bin/bash -c \'echo {} > {}\''.format(intr_thread, irq)], | |
| shell=True) |
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