* [PATCH v2] RFC: Benchmarking script
@ 2024-04-05 6:12 David Gibson
2024-04-05 18:10 ` Stefano Brivio
0 siblings, 1 reply; 3+ messages in thread
From: David Gibson @ 2024-04-05 6:12 UTC (permalink / raw)
To: passt-dev, Stefano Brivio; +Cc: David Gibson
Although we make some performance measurements in our regular testsuite,
those are designed more for getting a quick(ish) rough idea of the
performance, rather than a more precise measurement.
This patch adds a Python script in contrib/benchmark which can make more
detailed benchmarks. It can test both passt & pasta themselves, but also
various other scenarios for comparison, such as kernel veth, qemu -net tap
and slirp (either qemu -net user or slirp4netns).
It does some basic statistics on the results to get at least a rough error
estimate.
---
contrib/benchmark/.gitignore | 3 +
contrib/benchmark/benchmark.py | 462 +++++++++++++++++++++++++++++++++
2 files changed, 465 insertions(+)
create mode 100644 contrib/benchmark/.gitignore
create mode 100755 contrib/benchmark/benchmark.py
diff --git a/contrib/benchmark/.gitignore b/contrib/benchmark/.gitignore
new file mode 100644
index 00000000..7e9f3c7c
--- /dev/null
+++ b/contrib/benchmark/.gitignore
@@ -0,0 +1,3 @@
+*.json
+*.ssh
+*.hosts
diff --git a/contrib/benchmark/benchmark.py b/contrib/benchmark/benchmark.py
new file mode 100755
index 00000000..0a6599ee
--- /dev/null
+++ b/contrib/benchmark/benchmark.py
@@ -0,0 +1,462 @@
+#! /usr/bin/python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Benchmark for passt/pasta and other things for comparison
+#
+# Copyright Red Hat
+# Author: David Gibson <david@gibson.dropbear.id.au>
+#
+
+# How to use
+#
+# For best results, run on an idle system with external networks
+# disabled.
+#
+# 1. Adjust TIME, OMIT, INTERVAL globals to select the length of the
+# test
+# 2. Run
+# $ ./benchmark.py <scenarios>
+#
+# Scenarios:
+#
+# loopback - Direct transfer over lo interface
+# Run within a network namespace both to isolate and remove impact
+# of any netfilter rules.
+#
+# veth_{in,out} - Transfer over kernel veth device
+# 'in' is from parent netns to child, 'out' is reverse
+#
+# pasta_{in,out} - Transfer over pasta managed netns
+#
+# slirp4netns_{in,out} - Transfer over slirp4netns managed netns
+#
+# qemu_user_{in,out} - Transfer host <-> qemu guest with -net user
+#
+# passt_{in,out} - Transfer host <-> qemu guest with passt
+#
+# qemu_tap_{in,out} - Transfer host <-> qemu guest with -net tap
+#
+
+import sys
+import os
+import time
+import socket
+import math
+import contextlib
+import json
+import subprocess
+import statistics
+
+TIME, OMIT, INTERVAL = 6, 1, 1
+# TIME, OMIT, INTERVAL = 600, 10, 5
+
+NSTOOL = "../../test/nstool"
+PASST = "../../passt"
+PASTA = "../../pasta"
+MBUTO = "../../test/mbuto.img"
+GUEST_KEY = "../../test/guest-key"
+
+DEBUG = True
+
+SERVER = ["iperf3", "-s", "-1", "-I", "server.pid"]
+PORT = 5201
+
+IP1 = "192.0.2.1"
+IP2 = "192.0.2.2"
+IP3 = "192.0.2.3"
+IP4 = "192.0.2.4"
+
+
+def dbg(fmt, *args, **kwargs):
+ if DEBUG:
+ print("DBG: " + fmt.format(*args, **kwargs), file=sys.stderr)
+
+
+# Base class for command runners
+class Cmd:
+ def popen(self, args, **kwargs):
+ return subprocess.Popen(self.cmd_prefix + args, **kwargs)
+
+ def run(self, args, **kwargs):
+ return subprocess.run(self.cmd_prefix + args, **kwargs)
+
+
+class HostCmd(Cmd):
+ def __init__(self):
+ self.cmd_prefix = []
+
+
+class NsTool(contextlib.AbstractContextManager, Cmd):
+ def __init__(self, ctl, parent, holdprefix):
+ try:
+ os.remove(ctl)
+ except FileNotFoundError:
+ pass
+ self.ctl = ctl
+ self.parent = parent
+ self.proc = parent.popen(holdprefix + [NSTOOL, "hold", ctl],
+ stdout=subprocess.DEVNULL, stderr=None)
+ self.cmd_prefix = [NSTOOL, "exec", ctl, "--"]
+
+ def __enter__(self):
+ self.parent.run([NSTOOL, "info", "-w", self.ctl],
+ stdout=subprocess.DEVNULL).check_returncode()
+ self.proc.__enter__()
+ return self
+
+ def __exit__(self, exc_type, exc_value, traceback):
+ return self.proc.__exit__(exc_type, exc_value, traceback)
+
+ def relpid(self):
+ out = self.parent.run([NSTOOL, "info", "-p", self.ctl],
+ stdout=subprocess.PIPE)
+ return int(out.stdout)
+
+ def stop(self):
+ return self.parent.run([NSTOOL, "stop", self.ctl]).check_returncode()
+
+
+# We put everything into an isolated network namespace for a few reasons:
+# 1. Make sure test traffic doesn't leak out onto external interfaces
+# 2. Lets us allocate our own addresses freely
+# 3. Avoids firewall rules which might be set up on the host affecting
+# performance
+@contextlib.contextmanager
+def isolate(ctl):
+ with NsTool(ctl, HostCmd(), ["unshare", "-Unrp"]) as isons:
+ isons.run(["ip", "link", "set", "lo", "up"]).check_returncode()
+ yield isons
+ isons.stop()
+
+
+@contextlib.contextmanager
+def loopback(isons):
+ with isons.popen(SERVER):
+ yield (isons, "127.0.0.1")
+
+
+@contextlib.contextmanager
+def veth_ns(isons, ip_outer, ip_inner):
+ isons.run(["ip", "link", "add", "type", "veth"])
+ with NsTool("veth_in.ctl", isons, ["unshare", "-n"]) as guestns:
+ dbg("veth_ns guest ns ready")
+ isons.run(["ip", "link", "set", "veth1",
+ "netns", str(guestns.relpid())])
+ isons.run(["ip", "link", "set", "veth0", "up"])
+ isons.run(["ip", "addr", "add", f"{ip_outer}/24", "dev", "veth0"])
+ guestns.run(["ip", "link", "set", "veth1", "up"])
+ guestns.run(["ip", "addr", "add", f"{ip_inner}/24", "dev", "veth1"])
+ yield guestns
+ guestns.stop()
+
+
+@contextlib.contextmanager
+def veth_in(isons):
+ outer = IP3
+ inner = IP4
+ with veth_ns(isons, outer, inner) as guestns:
+ dbg("veth_in guestns ready")
+ with guestns.popen(SERVER):
+ yield (isons, inner)
+
+
+@contextlib.contextmanager
+def veth_out(isons):
+ outer = IP3
+ inner = IP4
+ with veth_ns(isons, outer, inner) as guestns:
+ dbg("veth_in guestns ready")
+ with isons.popen(SERVER):
+ yield (guestns, outer)
+
+
+def passt_config_isons(isons):
+ isons.run(["ip", "link", "add", "type", "dummy"]).check_returncode()
+ isons.run(["ip", "link", "set", "dummy0", "up"]).check_returncode()
+ isons.run(["ip", "addr", "add", f"{IP1}/24",
+ "dev", "dummy0"]).check_returncode()
+ isons.run(["ip", "route", "add", "default", "via", str(IP2),
+ "dev", "dummy0"]).check_returncode()
+
+
+@contextlib.contextmanager
+def pasta_in(isons):
+ passt_config_isons(isons)
+ cmd = [PASTA, "--config-net", "-t", str(PORT), "--"] + SERVER
+ with isons.popen(cmd):
+ time.sleep(1)
+ yield (isons, IP1)
+
+
+@contextlib.contextmanager
+def pasta_out(isons):
+ passt_config_isons(isons)
+ pasta = NsTool("pasta_out.ctl", isons, [PASTA, "--config-net", "--"])
+ with isons.popen(SERVER), pasta as pasta:
+ time.sleep(1)
+ yield (pasta, IP2)
+ pasta.stop()
+
+
+class Slirp4NetNs(contextlib.AbstractContextManager):
+ def __init__(self, ns, name, pid):
+ self.apipath = f"{name}.api"
+ self.ns = ns
+ self.pid = pid
+
+ def api(self, req):
+ with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as sock:
+ sock.connect(self.apipath)
+ sock.sendall(req)
+
+ def __enter__(self):
+ exit_r, exit_w = os.pipe()
+ self.exit = os.fdopen(exit_w, "wb")
+ cmd = ["slirp4netns", "-c", "-a", self.apipath, "-e", str(exit_r),
+ str(self.pid), "tap0"]
+ self.proc = self.ns.popen(cmd, pass_fds=(exit_r,))
+ self.proc.__enter__()
+ time.sleep(1)
+ return self
+
+ def __exit__(self, exc_type, exc_value, traceback):
+ self.exit.close()
+ return self.proc.__exit__(exc_type, exc_value, traceback)
+
+
+@contextlib.contextmanager
+def slirp4netns_in(isons):
+ with NsTool("slirp4netns_in.ctl", isons, ["unshare", "-n"]) as guestns:
+ with Slirp4NetNs(isons, "slirp4netns_in", guestns.relpid()) as slirp:
+ req = f'''
+{{
+ "execute": "add_hostfwd",
+ "arguments": {{
+ "proto": "tcp",
+ "host_addr": "0.0.0.0",
+ "host_port": {PORT},
+ "guest_addr": "10.0.2.100",
+ "guest_port": {PORT}
+ }}
+}}'''
+ slirp.api(bytes(req, 'UTF-8'))
+ with guestns.popen(SERVER):
+ yield (isons, "127.0.0.1")
+ guestns.stop()
+ dbg("guestns closed")
+ dbg("slirp exited")
+
+
+@contextlib.contextmanager
+def slirp4netns_out(isons):
+ with isons.popen(SERVER), \
+ NsTool("slirp4netns_in.ctl", isons, ["unshare", "-n"]) as guestns:
+ with Slirp4NetNs(isons, "slirp4netns_out", guestns.relpid()):
+ yield (guestns, "10.0.2.2")
+ guestns.stop()
+
+
+class MbutoQemu(Cmd, contextlib.AbstractContextManager):
+ def __init__(self, parent, name, opts):
+ self.ns = parent
+ self.name = name
+ self.ssh_config = f"{name}.ssh"
+ self.pidfile = f"{name}.pid"
+
+ cid = hash(name) & 0xffffffff
+ self.hosts = os.path.realpath(f"{name}.hosts")
+ try:
+ os.remove(self.hosts)
+ except FileNotFoundError:
+ pass
+ key = os.path.realpath(GUEST_KEY)
+
+ with open(self.ssh_config, "w") as c:
+ c.write(f"""
+Host {name}
+ User root
+ UserKnownHostsFile {self.hosts}
+ StrictHostKeyChecking no
+ IdentityFile {key}
+ IdentityAgent none
+ ProxyCommand socat - VSOCK-CONNECT:{cid}:22
+""")
+
+ kernel = f"/boot/vmlinuz-{os.uname().release}"
+
+ self.qemu_cmd = ["qemu-kvm", "-kernel", kernel, "-initrd", MBUTO,
+ "-append", '"console=ttyS0"',
+ "-nodefaults", "-nographic", "-serial", "stdio",
+ "-device", f"vhost-vsock-pci,guest-cid={cid}",
+ "-pidfile", self.pidfile] + list(opts)
+
+ self.cmd_prefix = ["ssh", "-F", self.ssh_config, "-t", name, "--"]
+
+ def __enter__(self):
+ dbg(f"Starting {self.qemu_cmd}")
+ self.qemu = self.ns.popen(self.qemu_cmd)
+ self.qemu.__enter__()
+ while self.run([":"], stderr=subprocess.DEVNULL).returncode != 0:
+ pass
+
+ return self
+
+ def __exit__(self, exc_type, exc_value, traceback):
+ pid = int(open(self.pidfile, "r").read())
+ self.ns.run(["kill", str(pid)])
+ ret = self.qemu.__exit__(exc_type, exc_value, traceback)
+ os.remove(self.ssh_config)
+ os.remove(self.hosts)
+ return ret
+
+ def dhcp(self):
+ self.run(["ip", "link", "set", "lo", "up"]).check_returncode()
+ self.run(["ip", "link", "set", "eth0", "up"]).check_returncode()
+ self.run(["dhclient", "-v", "eth0"]).check_returncode()
+
+ def static(self, ip):
+ self.run(["ip", "link", "set", "lo", "up"]).check_returncode()
+ self.run(["ip", "link", "set", "eth0", "up"]).check_returncode()
+ self.run(["ip", "addr", "add", ip, "dev", "eth0"]).check_returncode()
+
+
+@contextlib.contextmanager
+def qemu_user_in(isons):
+ opts = ["-m", "4G",
+ "-netdev", f"user,id=slirp,hostfwd=tcp:127.0.0.1:{PORT}-:{PORT}",
+ "-device", "virtio-net-pci,netdev=slirp"]
+ with MbutoQemu(isons, "slirp-qemu", opts) as qemu:
+ qemu.dhcp()
+ with qemu.popen(SERVER):
+ time.sleep(2)
+ dbg("Guest server ready")
+ yield (isons, "127.0.0.1")
+
+
+@contextlib.contextmanager
+def qemu_user_out(isons):
+ opts = ["-m", "4G", "-netdev", "user,id=slirp",
+ "-device", "virtio-net-pci,netdev=slirp"]
+ with MbutoQemu(isons, "slirp-qemu", opts) as qemu:
+ qemu.dhcp()
+ with isons.popen(SERVER):
+ time.sleep(2)
+ yield (qemu, "10.0.2.2")
+
+
+@contextlib.contextmanager
+def passt(ns, sock, opts=[]):
+ passt_cmd = [PASST, "-s", sock, "-1", "-f"] + opts
+ with ns.popen(passt_cmd):
+ yield
+ os.remove(sock)
+
+
+@contextlib.contextmanager
+def passt_qemu(ns, name, opts=[]):
+ sock = f"{name}.passt"
+ with passt(ns, sock, opts):
+ streamopts = f"id=passt,server=off,addr.type=unix,addr.path={sock}"
+ qemu_opts = ["-m", "4G",
+ "-netdev", f"stream,{streamopts}",
+ "-device", "virtio-net-pci,netdev=passt"]
+ with MbutoQemu(ns, name, qemu_opts) as qemu:
+ qemu.dhcp()
+ yield qemu
+
+
+@contextlib.contextmanager
+def passt_in(isons):
+ passt_config_isons(isons)
+ with passt_qemu(isons, "passt_in", ["-t", str(PORT)]) as qemu:
+ with qemu.popen(SERVER):
+ time.sleep(2)
+ dbg("Guest server ready")
+ yield (isons, "127.0.0.1")
+
+
+@contextlib.contextmanager
+def passt_out(isons):
+ passt_config_isons(isons)
+ with passt_qemu(isons, "passt_out") as qemu:
+ with isons.popen(SERVER):
+ time.sleep(2)
+ yield (qemu, IP2)
+
+
+@contextlib.contextmanager
+def tap_qemu(ns, name, opts):
+ opts += ["-netdev", "tap,id=tap,script=no,downscript=no",
+ "-device", "virtio-net-pci,netdev=tap"]
+ with MbutoQemu(ns, name, opts) as qemu:
+ ns.run(["ip", "link", "set", "tap0", "up"]).check_returncode()
+ ns.run(["ip", "addr", "add", f"{IP3}/24",
+ "dev", "tap0"]).check_returncode()
+ qemu.static(f"{IP4}/24")
+ yield qemu
+
+
+@contextlib.contextmanager
+def qemu_tap_in(isons):
+ opts = ["-m", "4G"]
+ with tap_qemu(isons, "tap_in", opts) as qemu:
+ with qemu.popen(SERVER):
+ time.sleep(2)
+ dbg("Guest server ready")
+ yield (isons, IP4)
+
+
+@contextlib.contextmanager
+def qemu_tap_out(isons):
+ opts = ["-m", "4G"]
+ with tap_qemu(isons, "tap_out", opts) as qemu:
+ with isons.popen(SERVER):
+ time.sleep(2)
+ yield (qemu, IP3)
+
+
+def bench_one(name, setup):
+ print(f"Running benchmark {name}...")
+ with setup as (crun, addr):
+ dbg("Setup for {}", name)
+ ccmd = ["iperf3", "-c", addr, "-J", "-t", str(TIME), "-O", str(OMIT),
+ "-i", str(INTERVAL), "-l", "1M"]
+ out = crun.run(ccmd, stdout=subprocess.PIPE, stderr=None)
+ dbg("Client completed for {}", name)
+ out.check_returncode()
+ return out.stdout
+
+
+def stats(name, out):
+ parse = json.loads(out)
+ intervals = parse['intervals']
+ sums = [i['sum'] for i in intervals]
+ samples = [s['bits_per_second'] for s in sums if not s['omitted']]
+ mean = statistics.fmean(samples)
+ stdev = statistics.stdev(samples)
+ spread = stdev / mean
+ n = len(samples)
+ stderr = stdev / math.sqrt(float(n))
+ relerr = stderr / abs(mean)
+ gbps = mean / 1000000000
+ print(f"{name:16}:\t{gbps:8.2f} Gbps ± {relerr:.1%} " + \
+ f"({n} intervals, {spread:.1%})")
+
+
+ALL = ["loopback", "veth_in", "veth_out", "pasta_in", "pasta_out",
+ "slirp4netns_in", "slirp4netns_out", "qemu_user_in", "qemu_user_out",
+ "qemu_tap_in", "qemu_tap_out", "passt_in", "passt_out"]
+
+if __name__ == "__main__":
+ results = {}
+ cases = sys.argv[1:]
+ if not cases:
+ cases = ALL
+ for case in cases:
+ with isolate("isolate.ctl") as isons:
+ setup = globals()[case](isons)
+ out = bench_one(case, setup)
+ open(f"{case}.json", "wb").write(out)
+ results[case] = out
+ for name, out in results.items():
+ stats(name, out)
--
@@ -0,0 +1,462 @@
+#! /usr/bin/python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Benchmark for passt/pasta and other things for comparison
+#
+# Copyright Red Hat
+# Author: David Gibson <david@gibson.dropbear.id.au>
+#
+
+# How to use
+#
+# For best results, run on an idle system with external networks
+# disabled.
+#
+# 1. Adjust TIME, OMIT, INTERVAL globals to select the length of the
+# test
+# 2. Run
+# $ ./benchmark.py <scenarios>
+#
+# Scenarios:
+#
+# loopback - Direct transfer over lo interface
+# Run within a network namespace both to isolate and remove impact
+# of any netfilter rules.
+#
+# veth_{in,out} - Transfer over kernel veth device
+# 'in' is from parent netns to child, 'out' is reverse
+#
+# pasta_{in,out} - Transfer over pasta managed netns
+#
+# slirp4netns_{in,out} - Transfer over slirp4netns managed netns
+#
+# qemu_user_{in,out} - Transfer host <-> qemu guest with -net user
+#
+# passt_{in,out} - Transfer host <-> qemu guest with passt
+#
+# qemu_tap_{in,out} - Transfer host <-> qemu guest with -net tap
+#
+
+import sys
+import os
+import time
+import socket
+import math
+import contextlib
+import json
+import subprocess
+import statistics
+
+TIME, OMIT, INTERVAL = 6, 1, 1
+# TIME, OMIT, INTERVAL = 600, 10, 5
+
+NSTOOL = "../../test/nstool"
+PASST = "../../passt"
+PASTA = "../../pasta"
+MBUTO = "../../test/mbuto.img"
+GUEST_KEY = "../../test/guest-key"
+
+DEBUG = True
+
+SERVER = ["iperf3", "-s", "-1", "-I", "server.pid"]
+PORT = 5201
+
+IP1 = "192.0.2.1"
+IP2 = "192.0.2.2"
+IP3 = "192.0.2.3"
+IP4 = "192.0.2.4"
+
+
+def dbg(fmt, *args, **kwargs):
+ if DEBUG:
+ print("DBG: " + fmt.format(*args, **kwargs), file=sys.stderr)
+
+
+# Base class for command runners
+class Cmd:
+ def popen(self, args, **kwargs):
+ return subprocess.Popen(self.cmd_prefix + args, **kwargs)
+
+ def run(self, args, **kwargs):
+ return subprocess.run(self.cmd_prefix + args, **kwargs)
+
+
+class HostCmd(Cmd):
+ def __init__(self):
+ self.cmd_prefix = []
+
+
+class NsTool(contextlib.AbstractContextManager, Cmd):
+ def __init__(self, ctl, parent, holdprefix):
+ try:
+ os.remove(ctl)
+ except FileNotFoundError:
+ pass
+ self.ctl = ctl
+ self.parent = parent
+ self.proc = parent.popen(holdprefix + [NSTOOL, "hold", ctl],
+ stdout=subprocess.DEVNULL, stderr=None)
+ self.cmd_prefix = [NSTOOL, "exec", ctl, "--"]
+
+ def __enter__(self):
+ self.parent.run([NSTOOL, "info", "-w", self.ctl],
+ stdout=subprocess.DEVNULL).check_returncode()
+ self.proc.__enter__()
+ return self
+
+ def __exit__(self, exc_type, exc_value, traceback):
+ return self.proc.__exit__(exc_type, exc_value, traceback)
+
+ def relpid(self):
+ out = self.parent.run([NSTOOL, "info", "-p", self.ctl],
+ stdout=subprocess.PIPE)
+ return int(out.stdout)
+
+ def stop(self):
+ return self.parent.run([NSTOOL, "stop", self.ctl]).check_returncode()
+
+
+# We put everything into an isolated network namespace for a few reasons:
+# 1. Make sure test traffic doesn't leak out onto external interfaces
+# 2. Lets us allocate our own addresses freely
+# 3. Avoids firewall rules which might be set up on the host affecting
+# performance
+@contextlib.contextmanager
+def isolate(ctl):
+ with NsTool(ctl, HostCmd(), ["unshare", "-Unrp"]) as isons:
+ isons.run(["ip", "link", "set", "lo", "up"]).check_returncode()
+ yield isons
+ isons.stop()
+
+
+@contextlib.contextmanager
+def loopback(isons):
+ with isons.popen(SERVER):
+ yield (isons, "127.0.0.1")
+
+
+@contextlib.contextmanager
+def veth_ns(isons, ip_outer, ip_inner):
+ isons.run(["ip", "link", "add", "type", "veth"])
+ with NsTool("veth_in.ctl", isons, ["unshare", "-n"]) as guestns:
+ dbg("veth_ns guest ns ready")
+ isons.run(["ip", "link", "set", "veth1",
+ "netns", str(guestns.relpid())])
+ isons.run(["ip", "link", "set", "veth0", "up"])
+ isons.run(["ip", "addr", "add", f"{ip_outer}/24", "dev", "veth0"])
+ guestns.run(["ip", "link", "set", "veth1", "up"])
+ guestns.run(["ip", "addr", "add", f"{ip_inner}/24", "dev", "veth1"])
+ yield guestns
+ guestns.stop()
+
+
+@contextlib.contextmanager
+def veth_in(isons):
+ outer = IP3
+ inner = IP4
+ with veth_ns(isons, outer, inner) as guestns:
+ dbg("veth_in guestns ready")
+ with guestns.popen(SERVER):
+ yield (isons, inner)
+
+
+@contextlib.contextmanager
+def veth_out(isons):
+ outer = IP3
+ inner = IP4
+ with veth_ns(isons, outer, inner) as guestns:
+ dbg("veth_in guestns ready")
+ with isons.popen(SERVER):
+ yield (guestns, outer)
+
+
+def passt_config_isons(isons):
+ isons.run(["ip", "link", "add", "type", "dummy"]).check_returncode()
+ isons.run(["ip", "link", "set", "dummy0", "up"]).check_returncode()
+ isons.run(["ip", "addr", "add", f"{IP1}/24",
+ "dev", "dummy0"]).check_returncode()
+ isons.run(["ip", "route", "add", "default", "via", str(IP2),
+ "dev", "dummy0"]).check_returncode()
+
+
+@contextlib.contextmanager
+def pasta_in(isons):
+ passt_config_isons(isons)
+ cmd = [PASTA, "--config-net", "-t", str(PORT), "--"] + SERVER
+ with isons.popen(cmd):
+ time.sleep(1)
+ yield (isons, IP1)
+
+
+@contextlib.contextmanager
+def pasta_out(isons):
+ passt_config_isons(isons)
+ pasta = NsTool("pasta_out.ctl", isons, [PASTA, "--config-net", "--"])
+ with isons.popen(SERVER), pasta as pasta:
+ time.sleep(1)
+ yield (pasta, IP2)
+ pasta.stop()
+
+
+class Slirp4NetNs(contextlib.AbstractContextManager):
+ def __init__(self, ns, name, pid):
+ self.apipath = f"{name}.api"
+ self.ns = ns
+ self.pid = pid
+
+ def api(self, req):
+ with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as sock:
+ sock.connect(self.apipath)
+ sock.sendall(req)
+
+ def __enter__(self):
+ exit_r, exit_w = os.pipe()
+ self.exit = os.fdopen(exit_w, "wb")
+ cmd = ["slirp4netns", "-c", "-a", self.apipath, "-e", str(exit_r),
+ str(self.pid), "tap0"]
+ self.proc = self.ns.popen(cmd, pass_fds=(exit_r,))
+ self.proc.__enter__()
+ time.sleep(1)
+ return self
+
+ def __exit__(self, exc_type, exc_value, traceback):
+ self.exit.close()
+ return self.proc.__exit__(exc_type, exc_value, traceback)
+
+
+@contextlib.contextmanager
+def slirp4netns_in(isons):
+ with NsTool("slirp4netns_in.ctl", isons, ["unshare", "-n"]) as guestns:
+ with Slirp4NetNs(isons, "slirp4netns_in", guestns.relpid()) as slirp:
+ req = f'''
+{{
+ "execute": "add_hostfwd",
+ "arguments": {{
+ "proto": "tcp",
+ "host_addr": "0.0.0.0",
+ "host_port": {PORT},
+ "guest_addr": "10.0.2.100",
+ "guest_port": {PORT}
+ }}
+}}'''
+ slirp.api(bytes(req, 'UTF-8'))
+ with guestns.popen(SERVER):
+ yield (isons, "127.0.0.1")
+ guestns.stop()
+ dbg("guestns closed")
+ dbg("slirp exited")
+
+
+@contextlib.contextmanager
+def slirp4netns_out(isons):
+ with isons.popen(SERVER), \
+ NsTool("slirp4netns_in.ctl", isons, ["unshare", "-n"]) as guestns:
+ with Slirp4NetNs(isons, "slirp4netns_out", guestns.relpid()):
+ yield (guestns, "10.0.2.2")
+ guestns.stop()
+
+
+class MbutoQemu(Cmd, contextlib.AbstractContextManager):
+ def __init__(self, parent, name, opts):
+ self.ns = parent
+ self.name = name
+ self.ssh_config = f"{name}.ssh"
+ self.pidfile = f"{name}.pid"
+
+ cid = hash(name) & 0xffffffff
+ self.hosts = os.path.realpath(f"{name}.hosts")
+ try:
+ os.remove(self.hosts)
+ except FileNotFoundError:
+ pass
+ key = os.path.realpath(GUEST_KEY)
+
+ with open(self.ssh_config, "w") as c:
+ c.write(f"""
+Host {name}
+ User root
+ UserKnownHostsFile {self.hosts}
+ StrictHostKeyChecking no
+ IdentityFile {key}
+ IdentityAgent none
+ ProxyCommand socat - VSOCK-CONNECT:{cid}:22
+""")
+
+ kernel = f"/boot/vmlinuz-{os.uname().release}"
+
+ self.qemu_cmd = ["qemu-kvm", "-kernel", kernel, "-initrd", MBUTO,
+ "-append", '"console=ttyS0"',
+ "-nodefaults", "-nographic", "-serial", "stdio",
+ "-device", f"vhost-vsock-pci,guest-cid={cid}",
+ "-pidfile", self.pidfile] + list(opts)
+
+ self.cmd_prefix = ["ssh", "-F", self.ssh_config, "-t", name, "--"]
+
+ def __enter__(self):
+ dbg(f"Starting {self.qemu_cmd}")
+ self.qemu = self.ns.popen(self.qemu_cmd)
+ self.qemu.__enter__()
+ while self.run([":"], stderr=subprocess.DEVNULL).returncode != 0:
+ pass
+
+ return self
+
+ def __exit__(self, exc_type, exc_value, traceback):
+ pid = int(open(self.pidfile, "r").read())
+ self.ns.run(["kill", str(pid)])
+ ret = self.qemu.__exit__(exc_type, exc_value, traceback)
+ os.remove(self.ssh_config)
+ os.remove(self.hosts)
+ return ret
+
+ def dhcp(self):
+ self.run(["ip", "link", "set", "lo", "up"]).check_returncode()
+ self.run(["ip", "link", "set", "eth0", "up"]).check_returncode()
+ self.run(["dhclient", "-v", "eth0"]).check_returncode()
+
+ def static(self, ip):
+ self.run(["ip", "link", "set", "lo", "up"]).check_returncode()
+ self.run(["ip", "link", "set", "eth0", "up"]).check_returncode()
+ self.run(["ip", "addr", "add", ip, "dev", "eth0"]).check_returncode()
+
+
+@contextlib.contextmanager
+def qemu_user_in(isons):
+ opts = ["-m", "4G",
+ "-netdev", f"user,id=slirp,hostfwd=tcp:127.0.0.1:{PORT}-:{PORT}",
+ "-device", "virtio-net-pci,netdev=slirp"]
+ with MbutoQemu(isons, "slirp-qemu", opts) as qemu:
+ qemu.dhcp()
+ with qemu.popen(SERVER):
+ time.sleep(2)
+ dbg("Guest server ready")
+ yield (isons, "127.0.0.1")
+
+
+@contextlib.contextmanager
+def qemu_user_out(isons):
+ opts = ["-m", "4G", "-netdev", "user,id=slirp",
+ "-device", "virtio-net-pci,netdev=slirp"]
+ with MbutoQemu(isons, "slirp-qemu", opts) as qemu:
+ qemu.dhcp()
+ with isons.popen(SERVER):
+ time.sleep(2)
+ yield (qemu, "10.0.2.2")
+
+
+@contextlib.contextmanager
+def passt(ns, sock, opts=[]):
+ passt_cmd = [PASST, "-s", sock, "-1", "-f"] + opts
+ with ns.popen(passt_cmd):
+ yield
+ os.remove(sock)
+
+
+@contextlib.contextmanager
+def passt_qemu(ns, name, opts=[]):
+ sock = f"{name}.passt"
+ with passt(ns, sock, opts):
+ streamopts = f"id=passt,server=off,addr.type=unix,addr.path={sock}"
+ qemu_opts = ["-m", "4G",
+ "-netdev", f"stream,{streamopts}",
+ "-device", "virtio-net-pci,netdev=passt"]
+ with MbutoQemu(ns, name, qemu_opts) as qemu:
+ qemu.dhcp()
+ yield qemu
+
+
+@contextlib.contextmanager
+def passt_in(isons):
+ passt_config_isons(isons)
+ with passt_qemu(isons, "passt_in", ["-t", str(PORT)]) as qemu:
+ with qemu.popen(SERVER):
+ time.sleep(2)
+ dbg("Guest server ready")
+ yield (isons, "127.0.0.1")
+
+
+@contextlib.contextmanager
+def passt_out(isons):
+ passt_config_isons(isons)
+ with passt_qemu(isons, "passt_out") as qemu:
+ with isons.popen(SERVER):
+ time.sleep(2)
+ yield (qemu, IP2)
+
+
+@contextlib.contextmanager
+def tap_qemu(ns, name, opts):
+ opts += ["-netdev", "tap,id=tap,script=no,downscript=no",
+ "-device", "virtio-net-pci,netdev=tap"]
+ with MbutoQemu(ns, name, opts) as qemu:
+ ns.run(["ip", "link", "set", "tap0", "up"]).check_returncode()
+ ns.run(["ip", "addr", "add", f"{IP3}/24",
+ "dev", "tap0"]).check_returncode()
+ qemu.static(f"{IP4}/24")
+ yield qemu
+
+
+@contextlib.contextmanager
+def qemu_tap_in(isons):
+ opts = ["-m", "4G"]
+ with tap_qemu(isons, "tap_in", opts) as qemu:
+ with qemu.popen(SERVER):
+ time.sleep(2)
+ dbg("Guest server ready")
+ yield (isons, IP4)
+
+
+@contextlib.contextmanager
+def qemu_tap_out(isons):
+ opts = ["-m", "4G"]
+ with tap_qemu(isons, "tap_out", opts) as qemu:
+ with isons.popen(SERVER):
+ time.sleep(2)
+ yield (qemu, IP3)
+
+
+def bench_one(name, setup):
+ print(f"Running benchmark {name}...")
+ with setup as (crun, addr):
+ dbg("Setup for {}", name)
+ ccmd = ["iperf3", "-c", addr, "-J", "-t", str(TIME), "-O", str(OMIT),
+ "-i", str(INTERVAL), "-l", "1M"]
+ out = crun.run(ccmd, stdout=subprocess.PIPE, stderr=None)
+ dbg("Client completed for {}", name)
+ out.check_returncode()
+ return out.stdout
+
+
+def stats(name, out):
+ parse = json.loads(out)
+ intervals = parse['intervals']
+ sums = [i['sum'] for i in intervals]
+ samples = [s['bits_per_second'] for s in sums if not s['omitted']]
+ mean = statistics.fmean(samples)
+ stdev = statistics.stdev(samples)
+ spread = stdev / mean
+ n = len(samples)
+ stderr = stdev / math.sqrt(float(n))
+ relerr = stderr / abs(mean)
+ gbps = mean / 1000000000
+ print(f"{name:16}:\t{gbps:8.2f} Gbps ± {relerr:.1%} " + \
+ f"({n} intervals, {spread:.1%})")
+
+
+ALL = ["loopback", "veth_in", "veth_out", "pasta_in", "pasta_out",
+ "slirp4netns_in", "slirp4netns_out", "qemu_user_in", "qemu_user_out",
+ "qemu_tap_in", "qemu_tap_out", "passt_in", "passt_out"]
+
+if __name__ == "__main__":
+ results = {}
+ cases = sys.argv[1:]
+ if not cases:
+ cases = ALL
+ for case in cases:
+ with isolate("isolate.ctl") as isons:
+ setup = globals()[case](isons)
+ out = bench_one(case, setup)
+ open(f"{case}.json", "wb").write(out)
+ results[case] = out
+ for name, out in results.items():
+ stats(name, out)
--
2.44.0
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH v2] RFC: Benchmarking script
2024-04-05 6:12 [PATCH v2] RFC: Benchmarking script David Gibson
@ 2024-04-05 18:10 ` Stefano Brivio
2024-04-06 3:31 ` David Gibson
0 siblings, 1 reply; 3+ messages in thread
From: Stefano Brivio @ 2024-04-05 18:10 UTC (permalink / raw)
To: David Gibson; +Cc: passt-dev
On Fri, 5 Apr 2024 17:12:21 +1100
David Gibson <david@gibson.dropbear.id.au> wrote:
> Although we make some performance measurements in our regular testsuite,
> those are designed more for getting a quick(ish) rough idea of the
> performance, rather than a more precise measurement.
>
> This patch adds a Python script in contrib/benchmark which can make more
> detailed benchmarks. It can test both passt & pasta themselves, but also
> various other scenarios for comparison, such as kernel veth, qemu -net tap
> and slirp (either qemu -net user or slirp4netns).
Hah, nice. I haven't tried or reviewed this yet, but I just realised
one thing: iperf3 3.16 finally implements separate streams (-P) as
multiple threads! See:
https://github.com/esnet/iperf/pull/1591
or release notes. That also means that the whole parallel process
nonsense in the regular suite can finally go away, I guess. I haven't
tested that yet, though.
By the way of that, you mentioned in the past that you had some
throughput failures with UDP tests. Well, I looked into 3.16 changes
because of that -- they started failing for me as well with the new
version. I temporarily reverted back to 3.14 on my system, until we
figure out how to adjust to the new meaning of the "-P" option.
Another thing that occurred to me: it would probably be helpful to
already have vhost-user cases for passt here.
Anyway, I'll give this a try soon. I can also apply it right away if
you prefer.
--
Stefano
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] RFC: Benchmarking script
2024-04-05 18:10 ` Stefano Brivio
@ 2024-04-06 3:31 ` David Gibson
0 siblings, 0 replies; 3+ messages in thread
From: David Gibson @ 2024-04-06 3:31 UTC (permalink / raw)
To: Stefano Brivio; +Cc: passt-dev
[-- Attachment #1: Type: text/plain, Size: 2726 bytes --]
On Fri, Apr 05, 2024 at 08:10:26PM +0200, Stefano Brivio wrote:
> On Fri, 5 Apr 2024 17:12:21 +1100
> David Gibson <david@gibson.dropbear.id.au> wrote:
>
> > Although we make some performance measurements in our regular testsuite,
> > those are designed more for getting a quick(ish) rough idea of the
> > performance, rather than a more precise measurement.
> >
> > This patch adds a Python script in contrib/benchmark which can make more
> > detailed benchmarks. It can test both passt & pasta themselves, but also
> > various other scenarios for comparison, such as kernel veth, qemu -net tap
> > and slirp (either qemu -net user or slirp4netns).
>
> Hah, nice. I haven't tried or reviewed this yet, but I just realised
> one thing: iperf3 3.16 finally implements separate streams (-P) as
> multiple threads! See:
>
> https://github.com/esnet/iperf/pull/1591
I hadn't realised it was just a new addition, but I did notice that -P
used multiple threads
> or release notes. That also means that the whole parallel process
> nonsense in the regular suite can finally go away, I guess. I haven't
> tested that yet, though.
Yes, that would make things notably less messy.
This script doesn't yet use parallel streams - I need to make it do
that though, because I'll need those results for my talk in a week/
> By the way of that, you mentioned in the past that you had some
> throughput failures with UDP tests. Well, I looked into 3.16 changes
> because of that -- they started failing for me as well with the new
> version. I temporarily reverted back to 3.14 on my system, until we
> figure out how to adjust to the new meaning of the "-P" option.
Ok, good to know. In any case the UDP "throughput" tests as they
stand are basically nonsense. Testing UDP throughput needs a fancier
method, basically increasing the rate until we start dropping packets.
iperf3 doesn't do that (and tools that do seem to be kinda hard to
find). At the moment we basically just have some hardcoded target
rates, so really all these tests are doing is saying "can we reach
this target throughput, where this target was selected with no
consideration of the capabilities of this host system".
> Another thing that occurred to me: it would probably be helpful to
> already have vhost-user cases for passt here.
Yes, it would. And in particular those would be useful for my talk as
well.
> Anyway, I'll give this a try soon. I can also apply it right away if
> you prefer.
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-04-06 4:25 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-04-05 6:12 [PATCH v2] RFC: Benchmarking script David Gibson
2024-04-05 18:10 ` Stefano Brivio
2024-04-06 3:31 ` David Gibson
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