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simulator.py
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# Copyright (C) 2021 The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information
import time
import click
from . import cli
@cli.group("simulator")
def simulator():
"""Scheduler simulator."""
pass
@simulator.command("fill-test-data")
@click.option(
"--num-origins",
"-n",
type=int,
default=100000,
help="Number of listed origins to add",
)
@click.pass_context
def fill_test_data_command(ctx, num_origins):
"""Fill the scheduler with test data for simulation purposes."""
from swh.scheduler.simulator import fill_test_data
click.echo(f"Filling {num_origins:,} listed origins data...")
start = time.monotonic()
fill_test_data(ctx.obj["scheduler"], num_origins=num_origins)
runtime = time.monotonic() - start
click.echo(f"Completed in {runtime:.2f} seconds")
@simulator.command("run")
@click.option(
"--scheduler",
"-s",
type=click.Choice(["task_scheduler", "origin_scheduler"]),
default="origin_scheduler",
help="Scheduler to simulate",
)
@click.option(
"--policy",
"-p",
default="oldest_scheduled_first",
help="Scheduling policy to simulate (only for origin_scheduler)",
)
@click.option("--runtime", "-t", type=float, help="Simulated runtime")
@click.option(
"--plots/--no-plots",
"-P",
"showplots",
help="Show results as plots (with plotille)",
)
@click.option(
"--csv", "-o", "csvfile", type=click.File("w"), help="Export results in a CSV file"
)
@click.pass_context
def run_command(ctx, scheduler, policy, runtime, showplots, csvfile):
"""Run the scheduler simulator.
By default, the simulation runs forever. You can cap the simulated runtime
with the --runtime option, and you can always press Ctrl+C to interrupt the
running simulation.
'task_scheduler' is the "classic" task-based scheduler; 'origin_scheduler'
is the new origin-visit-aware simulator. The latter uses --policy to decide
which origins to schedule first based on information from listers.
"""
from swh.scheduler.simulator import run
policy = policy if scheduler == "origin_scheduler" else None
report = run(
scheduler=ctx.obj["scheduler"],
scheduler_type=scheduler,
policy=policy,
runtime=runtime,
)
print(report.format(with_plots=showplots))
if csvfile is not None:
report.metrics_csv(csvfile)

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