Profiling
We have a built in support for iostat and DFTracer for I/O profiling. Below are instructions on how to use the two profiling tools in DLIO.
iostat profiling
To enable iostat profiling, one can set workload.workflow.profiling=True and workload.profiling.profiler=iostat, and set the devices list such as ‘[sda, sdb]’. This will generate iostat.json file in the output folder. One can then post process the output and get out bandwidth information for the run.
dlio_postprocessor --output-folder hydra_log/unet3d/2022-11-09-17-55-44/
The output is
===============Processing DLIO output================
Job configuration
output_folder: hydra_log/unet3d/2023-06-27-21-27-12
hydra_folder: ./.hydra
num_proc: 8
epochs: 5
batch_size: 4
do_eval: False
batch_size_eval: 1
do_checkpoint: True
debug: False
name: unet3d
2023-06-27 21:38:00 Generating Report
2023-06-27 21:38:00 Calculating Loading and Processing Times
2023-06-27 21:38:00 Reading from hydra_log/unet3d/2023-06-27-21-27-12/0_output.json
2023-06-27 21:38:00 Processing loading and processing times for epoch 1
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 2
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 3
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 4
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 5
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Reading from hydra_log/unet3d/2023-06-27-21-27-12/1_output.json
2023-06-27 21:38:00 Processing loading and processing times for epoch 1
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 2
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 3
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 4
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 5
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Reading from hydra_log/unet3d/2023-06-27-21-27-12/2_output.json
2023-06-27 21:38:00 Processing loading and processing times for epoch 1
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 2
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 3
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 4
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 5
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Reading from hydra_log/unet3d/2023-06-27-21-27-12/3_output.json
2023-06-27 21:38:00 Processing loading and processing times for epoch 1
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 2
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 3
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 4
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 5
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Reading from hydra_log/unet3d/2023-06-27-21-27-12/4_output.json
2023-06-27 21:38:00 Processing loading and processing times for epoch 1
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 2
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 3
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 4
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 5
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Reading from hydra_log/unet3d/2023-06-27-21-27-12/5_output.json
2023-06-27 21:38:00 Processing loading and processing times for epoch 1
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 2
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 3
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 4
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 5
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Reading from hydra_log/unet3d/2023-06-27-21-27-12/6_output.json
2023-06-27 21:38:00 Processing loading and processing times for epoch 1
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 2
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 3
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 4
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 5
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Reading from hydra_log/unet3d/2023-06-27-21-27-12/7_output.json
2023-06-27 21:38:00 Processing loading and processing times for epoch 1
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 2
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 3
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 4
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Processing loading and processing times for epoch 5
2023-06-27 21:38:00 Processing loading times for phase block1
2023-06-27 21:38:00 Processing processing times for phase block1
2023-06-27 21:38:00 Computing overall stats
2023-06-27 21:38:00 Computing per epoch stats
2023-06-27 21:38:00 Computing stats for epoch 1 block1
2023-06-27 21:38:00 Computing stats for epoch 2 block1
2023-06-27 21:38:00 Computing stats for epoch 3 block1
2023-06-27 21:38:00 Computing stats for epoch 4 block1
2023-06-27 21:38:00 Computing stats for epoch 5 block1
2023-06-27 21:38:00 Parsing iostat trace
2023-06-27 21:38:00 Processing iostat item 0
2023-06-27 21:38:00 Processing iostat item 100
2023-06-27 21:38:00 Extracting stats from iostat trace
2023-06-27 21:38:00 Extracting stats for epoch 1 start
2023-06-27 21:38:00 Extracting stats for epoch 1 block1
2023-06-27 21:38:00 Extracting stats for epoch 1 end
2023-06-27 21:38:00 Extracting stats for epoch 1 duration
2023-06-27 21:38:00 Extracting stats for epoch 2 start
2023-06-27 21:38:00 Extracting stats for epoch 2 block1
2023-06-27 21:38:00 Extracting stats for epoch 2 end
2023-06-27 21:38:00 Extracting stats for epoch 2 duration
2023-06-27 21:38:00 Extracting stats for epoch 3 start
2023-06-27 21:38:00 Extracting stats for epoch 3 block1
2023-06-27 21:38:00 Extracting stats for epoch 3 end
2023-06-27 21:38:00 Extracting stats for epoch 3 duration
2023-06-27 21:38:00 Extracting stats for epoch 4 start
2023-06-27 21:38:00 Extracting stats for epoch 4 block1
2023-06-27 21:38:00 Extracting stats for epoch 4 end
2023-06-27 21:38:00 Extracting stats for epoch 4 duration
2023-06-27 21:38:00 Extracting stats for epoch 5 start
2023-06-27 21:38:00 Extracting stats for epoch 5 block1
2023-06-27 21:38:00 Extracting stats for epoch 5 ckpt1
2023-06-27 21:38:00 Less than 2 data points for rMB/s
2023-06-27 21:38:00 Less than 2 data points for wMB/s
2023-06-27 21:38:00 Less than 2 data points for r/s
2023-06-27 21:38:00 Less than 2 data points for w/s
2023-06-27 21:38:00 Less than 2 data points for r_await
2023-06-27 21:38:00 Less than 2 data points for w_await
2023-06-27 21:38:00 Less than 2 data points for aqu-sz
2023-06-27 21:38:00 Less than 2 data points for rMB/s
2023-06-27 21:38:00 Less than 2 data points for wMB/s
2023-06-27 21:38:00 Less than 2 data points for r/s
2023-06-27 21:38:00 Less than 2 data points for w/s
2023-06-27 21:38:00 Less than 2 data points for r_await
2023-06-27 21:38:00 Less than 2 data points for w_await
2023-06-27 21:38:00 Less than 2 data points for aqu-sz
2023-06-27 21:38:00 Less than 2 data points for user
2023-06-27 21:38:00 Less than 2 data points for system
2023-06-27 21:38:00 Less than 2 data points for iowait
2023-06-27 21:38:00 Less than 2 data points for steal
2023-06-27 21:38:00 Less than 2 data points for idle
2023-06-27 21:38:00 Extracting stats for epoch 5 end
2023-06-27 21:38:00 Extracting stats for epoch 5 duration
2023-06-27 21:38:00 Writing report
2023-06-27 21:38:00 Successfully wrote hydra_log/unet3d/2023-06-27-21-27-12/DLIO_unet3d_report.txt
#contents of DLIO_unet3d_report.txt
DLIO v1.0 Report
Note: Training phases lasting less than 2 seconds, will show 'n/a' values, as there is not enough data to compute statistics.
Overall
Run name: unet3d
Started: 2023-06-27 21:27:39.888787
Ended: 2023-06-27 21:30:47.206756
Duration (s): 187.32
Num Ranks: 8
Batch size (per rank): 4
mean std min median p90 p99 max
------------------------------------------------------------------------------------------
Throughput Stats (over all epochs)
Samples/s: 5.01 0.37 4.50 5.14 5.34 5.35 5.35
MB/s (derived from Samples/s): 701.09 51.93 628.76 718.08 746.48 747.83 747.98
I/O Stats (over all time segments)
Device: loop0
R Bandwidth (MB/s): 1.03 4.76 0.00 0.00 1.24 30.77 35.27
W Bandwidth (MB/s): 0.00 0.00 0.00 0.00 0.00 0.00 0.00
R IOPS: 29.34 123.80 0.00 0.00 49.00 777.20 941.00
W IOPS: 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Avg R Time (ms): 0.90 5.21 0.00 0.00 1.75 4.24 64.47
Avg W Time (ms): 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Avg Queue Length: 0.06 0.28 0.00 0.00 0.06 1.88 2.12
Device: vda
R Bandwidth (MB/s): 1237.58 242.75 5.50 1263.32 1474.27 1634.80 1642.81
W Bandwidth (MB/s): 20.06 67.84 0.00 0.30 56.33 194.48 765.05
R IOPS: 13906.51 3052.21 162.00 14116.50 17285.00 19339.22 22073.00
W IOPS: 240.30 448.71 0.00 27.00 931.00 1811.15 1926.00
Avg R Time (ms): 0.96 1.53 0.45 0.76 1.21 2.50 19.45
Avg W Time (ms): 2.38 5.48 0.00 1.50 4.46 9.86 66.79
Avg Queue Length: 11.76 3.30 0.18 11.15 16.07 20.65 23.32
CPU Stats
User (%): 39.97 7.33 28.23 37.62 49.38 66.97 72.57
System (%): 58.33 8.68 5.70 60.87 65.86 68.51 70.01
IO Wait (%): 1.49 5.19 0.00 0.51 2.14 21.05 53.89
Steal (%): 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Idle (%): 0.21 0.23 0.00 0.13 0.39 1.11 1.88
Detailed Report
Epoch 1
Started: 2023-06-27 21:27:39.888787
Ended: 2023-06-27 21:28:20.379070
Duration (s): 40.49
Block 1
Started: 2023-06-27 21:27:39.979028
Ended: 2023-06-27 21:28:13.541554
Duration (s): 33.56
Avg loading time / rank (s): 20.65
Avg processing time / rank (s): 33.55
...
DFTracer
ttps://github.com/hariharan-devarajan/dftracer. A profiler developed for capturing I/O calls. If DFTracer is enabled, profiling trace will be generated at the end of the run. The profiler provides profiling information at both application levels and system I/O calls level.
To enable this functionality, one has to install DFTracer throught
pip install dftracer
or
git clone git@github.com:hariharan-devarajan/dftracer.git
cd dftracer
python setup.py build
python setup.py install
Then set `DFTRACER_ENABLE=1` to enable it. Other environemnt variables setting can be found here: https://dftracer.readthedocs.io/en/latest/api.html#configurations-of-dftracer.
The profiler outputs all profiling output in <OUTPUT_FOLDER>/.trace*.pfw files. It contains application level profiling as well as low-level I/O calls from POSIX and STDIO layers. The low-level I/O events are only way to understand I/O pattern from internal framework functions such as TFRecordDataset or DaliDataLoader. These files are in chrome tracing’s json line format. This can be visualized using https://ui.perfetto.dev/
