Messages in this thread Patch in this message | | | From | Tejun Heo <> | Subject | [PATCH 4/5] iocost_monitor: exit successfully if interval is zero | Date | Wed, 8 Apr 2020 16:14:49 -0400 |
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This is to help external tools to decide whether iocost_monitor has all its requirements met or not based on the exit status of an -i0 run.
Signed-off-by: Tejun Heo <tj@kernel.org> --- tools/cgroup/iocost_monitor.py | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/cgroup/iocost_monitor.py b/tools/cgroup/iocost_monitor.py index 7427a5ee761b..eb2363b868c5 100644 --- a/tools/cgroup/iocost_monitor.py +++ b/tools/cgroup/iocost_monitor.py @@ -28,7 +28,8 @@ parser.add_argument('devname', metavar='DEV', parser.add_argument('--cgroup', action='append', metavar='REGEX', help='Regex for target cgroups, ') parser.add_argument('--interval', '-i', metavar='SECONDS', type=float, default=1, - help='Monitoring interval in seconds') + help='Monitoring interval in seconds (0 exits immediately ' + 'after checking requirements)') parser.add_argument('--json', action='store_true', help='Output in json') args = parser.parse_args() @@ -243,6 +244,9 @@ ioc = None if ioc is None: err(f'Could not find ioc for {devname}'); +if interval == 0: + sys.exit(0) + # Keep printing while True: now = time.time() -- 2.25.1
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