argo-perf-wrapper 4.64 KB
Newer Older
Kamil Iskra's avatar
Kamil Iskra committed
1 2 3 4 5 6 7 8 9 10
#!/usr/bin/env python2

from __future__ import print_function

import argparse
import logging
import os
import tempfile
import subprocess
import uuid
11
from nrm import messaging
Kamil Iskra's avatar
Kamil Iskra committed
12

13
PUB_MSG = messaging.MSGTYPES['down_event']
Kamil Iskra's avatar
Kamil Iskra committed
14 15
logger = logging.getLogger('perf-wrapper')

16

Kamil Iskra's avatar
Kamil Iskra committed
17 18 19 20 21 22 23 24 25
class PerfWrapper(object):

    """Implements middleware between the Linux perf and
    the NRM downstream interface."""

    def __init__(self):
        pass

    def shutdown(self):
26 27 28
        update = {'api': 'down_event',
                  'type': 'application_exit',
                  'application_uuid': self.app_uuid,
Kamil Iskra's avatar
Kamil Iskra committed
29
                  }
30 31
        msg = PUB_MSG['application_exit'](**update)
        self.downstream_event.sendmsg(msg)
Kamil Iskra's avatar
Kamil Iskra committed
32

33
    def performance_report(self, performance):
34
        update = {'api': 'down_event',
35 36 37 38
                  'type': 'performance',
                  'payload': performance,
                  'container_uuid' : self.container_uuid,
                  'application_uuid' : self.app_uuid,
Kamil Iskra's avatar
Kamil Iskra committed
39
                  }
40
        msg = PUB_MSG['performance'](**update)
41
        self.downstream_event.sendmsg(msg)
Kamil Iskra's avatar
Kamil Iskra committed
42 43

    def setup(self):
44 45 46 47
        downstream_url = "ipc:///tmp/nrm-downstream-event"
        self.downstream_event = messaging.DownstreamEventClient(downstream_url)
        self.downstream_event.wait_connected()
        logger.info("downstream pub socket connected to: %s", downstream_url)
Kamil Iskra's avatar
Kamil Iskra committed
48 49 50 51 52 53 54 55 56

        # retrieve our container uuid
        self.container_uuid = os.environ.get('ARGO_CONTAINER_UUID')
        if self.container_uuid is None:
            logger.error("missing container uuid")
            exit(1)
        self.app_uuid = str(uuid.uuid4())
        logger.info("client uuid: %r", self.app_uuid)
        # send an hello to the demon
57 58 59 60
        update = {'api': 'down_event',
                  'type': 'application_start',
                  'container_uuid': self.container_uuid,
                  'application_uuid': self.app_uuid,
Kamil Iskra's avatar
Kamil Iskra committed
61
                  }
62 63
        msg = PUB_MSG['application_start'](**update)
        self.downstream_event.sendmsg(msg)
Kamil Iskra's avatar
Kamil Iskra committed
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89

    def main(self):
        parser = argparse.ArgumentParser()
        parser.add_argument("-v", "--verbose",
                            help="verbose logging information",
                            action='store_true')
        parser.add_argument("-f", "--frequency",
                            help="sampling frequency in ms",
                            type=int, default=1000)
        parser.add_argument("cmd", help="command and arguments",
                            nargs=argparse.REMAINDER)
        args = parser.parse_args()

        if args.verbose:
            logger.setLevel(logging.DEBUG)

        logger.info("cmd: %r", args.cmd)

        self.setup()

        # create a named pipe between us and the to-be-launched perf
        # There is no mkstemp for FIFOs but we can securely create a temporary
        # directory and then create a FIFO inside of it.
        tmpdir = tempfile.mkdtemp()
        fifoname = os.path.join(tmpdir, 'perf-fifo')
        logger.info("fifoname: %r", fifoname)
90
        os.mkfifo(fifoname, 0o600)
Kamil Iskra's avatar
Kamil Iskra committed
91

92 93
        perf_tool_path = os.environ.get('PERF', 'perf')
        argv = [perf_tool_path, 'stat', '-e', 'instructions', '-x', ',',
Kamil Iskra's avatar
Kamil Iskra committed
94 95 96 97 98 99 100 101 102 103 104 105 106 107 108
                '-I', str(args.frequency), '-o', fifoname, '--']
        argv.extend(args.cmd)
        logger.info("argv: %r", argv)

        p = subprocess.Popen(argv, close_fds=True)

        # This blocks until the other end opens as well so we need to invoke
        # it after Popen.
        # FIXME: will deadlock if Popen fails (say, no perf).
        fifo = open(fifoname, 'r')

        last_time = 0.0
        # "for line in fifo" idiom didn't work for me here -- Python was
        # buffering the output internally until perf was finished.
        while True:
109
            line = fifo.readline()
Kamil Iskra's avatar
Kamil Iskra committed
110 111 112
            if not line:
                break

113
            line = line.strip()
Kamil Iskra's avatar
Kamil Iskra committed
114 115 116 117 118 119 120 121 122 123 124 125 126 127
            if len(line) == 0 or line[0] == '#':
                continue
            tokens = line.split(',')

            logger.info("tokens: %r", tokens)

            time = float(tokens[0])
            if tokens[1] == '<not counted>':
                instructions = 0
            else:
                instructions = int(tokens[1])
            ips = int(instructions / (time - last_time))

            logger.info("instructions per second: %r", ips)
128
            self.performance_report(ips)
Kamil Iskra's avatar
Kamil Iskra committed
129 130 131 132 133 134 135 136 137 138 139

            last_time = time

        # The child should be dead by now so this should terminate immediately.
        p.wait()

        self.shutdown()
        fifo.close()
        os.remove(fifoname)
        os.rmdir(tmpdir)

140

Kamil Iskra's avatar
Kamil Iskra committed
141 142 143 144
if __name__ == "__main__":
    logging.basicConfig(level=logging.WARNING)
    wrapper = PerfWrapper()
    wrapper.main()