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| author |   Tejun Heo <tj@kernel.org> | 2020-04-13 12:27:57 -0400 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-04-30 15:54:45 -0600 |
| commit | f4fe3ea636385a51f1dfbb27c387a04b12b919e9 (patch) | |
| tree | 9033f3957cfece9184c9ab805b69c34783c55356 /tools/cgroup/iocost_monitor.py | |
| parent | blk-iocost: account for IO size when testing latencies (diff) | |
| download | linux-dev-f4fe3ea636385a51f1dfbb27c387a04b12b919e9.tar.xz linux-dev-f4fe3ea636385a51f1dfbb27c387a04b12b919e9.zip | |
iocost_monitor: exit successfully if interval is zero
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>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/cgroup/iocost_monitor.py')
| -rw-r--r-- | tools/cgroup/iocost_monitor.py | 6 |
1 files changed, 5 insertions, 1 deletions
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 @@ for i, ptr in radix_tree_for_each(blkcg_root.blkg_tree.address_of_()): 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() |