How to messure actual nvv4l2decoder0 latancy?

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU) nvidia 2070 with maxq design
• DeepStream Version 6.2
• TensorRT Version
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

I used two sinks to run a deepstream pipeline, one saves the video input as an output video, the other gives a osd output, when I enable the export NVDS_ENABLE_COMPONENT_LATENCY_MEASUREMENT=1 and export NVDS_ENABLE_LATENCY_MEASUREMENT=1, the outputs are completely different. One is :BATCH-NUM = 4512**
Batch meta not found for buffer 0x7fc2b80d6240Encode Latency = 1.504883
and the other is
BATCH-NUM = 126**
Comp name = nvv4l2decoder0 in_system_timestamp = 1689017885691.079102 out_system_timestamp = 1689017885757.385010 component latency= 66.305908
Comp name = nvstreammux-src_bin_muxer source_id = 0 pad_index = 0 frame_num = 126 in_system_timestamp = 1689017885757.476074 out_system_timestamp = 1689017885825.273926 component_latency = 67.797852
Comp name = primary_gie in_system_timestamp = 1689017885825.395996 out_system_timestamp = 1689017885858.065918 component latency= 32.669922
Comp name = tracking_tracker in_system_timestamp = 1689017885858.086914 out_system_timestamp = 1689017885859.565918 component latency= 1.479004
Comp name = tiled_display_tiler in_system_timestamp = 1689017886078.507080 out_system_timestamp = 1689017886090.373047 component latency= 11.865967
Comp name = osd_conv in_system_timestamp = 1689017886344.568115 out_system_timestamp = 1689017886344.916016 component latency= 0.347900
Comp name = nvosd0 in_system_timestamp = 1689017886345.031006 out_system_timestamp = 1689017886360.415039 component latency= 15.384033
Source id = 0 Frame_num = 126 Frame latency = 853.768799 (ms)

and the nvv4l2decoder0 latency on average is 66ms which is unreasonably high. And for the video output, the perf(fps) is 130 which is 7ms per frame. What does these mean and how can we measure nvv4l2decoder0 latency directly?

here’s the config txt
[application]
enable-perf-measurement=1
perf-measurement-interval-sec=5
#gie-kitti-output-dir=streamscl

[tiled-display]
enable=1
rows=2
columns=2
width=832
height=832
gpu-id=0
#(0): nvbuf-mem-default - Default memory allocated, specific to particular platform
#(1): nvbuf-mem-cuda-pinned - Allocate Pinned/Host cuda memory, applicable for Tesla
#(2): nvbuf-mem-cuda-device - Allocate Device cuda memory, applicable for Tesla
#(3): nvbuf-mem-cuda-unified - Allocate Unified cuda memory, applicable for Tesla
#(4): nvbuf-mem-surface-array - Allocate Surface Array memory, applicable for Jetson
nvbuf-memory-type=0

[source0]
enable=1
#Type - 1=CameraV4L2 2=URI 3=MultiURI 4=RTSP
type=3
uri=file:///home/bo/Downloads/outputvideo_303_transformed.mp4
num-sources=1
#drop-frame-interval=2
gpu-id=0

(0): memtype_device - Memory type Device

(1): memtype_pinned - Memory type Host Pinned

(2): memtype_unified - Memory type Unified

cudadec-memtype=0

[sink0]

enable=1

#Type - 1=FakeSink 2=EglSink/nv3dsink (Jetson only) 3=File

type=2

sync=1

source-id=0

gpu-id=0

nvbuf-memory-type=0

[sink0]
enable=1
#Type - 1=FakeSink 2=EglSink 3=File 4=RTSPStreaming
type=3
#1=mp4 2=mkv
container=1
#1=h264 2=h265
codec=1
encoder type 0=Hardware 1=Software
enc-type=0
sync=0
#iframeinterval=10
bitrate=2000000
#H264 Profile - 0=Baseline 2=Main 4=High
#H265 Profile - 0=Main 1=Main10
profile=0
output-file=out.mp4
source-id=0

[osd]
enable=1
gpu-id=0
border-width=1
text-size=15
text-color=1;1;1;1;
text-bg-color=0.3;0.3;0.3;1
font=Serif
show-clock=0
clock-x-offset=800
clock-y-offset=820
clock-text-size=12
clock-color=1;0;0;0
nvbuf-memory-type=0

[streammux]
gpu-id=0
##Boolean property to inform muxer that sources are live
live-source=0
buffer-pool-size=1
batch-size=1
##time out in usec, to wait after the first buffer is available
##to push the batch even if the complete batch is not formed
batched-push-timeout=40000

Set muxer output width and height

width=832
height=832
#enable to maintain aspect ratio wrt source, and allow black borders, works
##along with width, height properties
enable-padding=0
nvbuf-memory-type=0

If set to TRUE, system timestamp will be attached as ntp timestamp

If set to FALSE, ntp timestamp from rtspsrc, if available, will be attached

attach-sys-ts-as-ntp=1

config-file property is mandatory for any gie section.

Other properties are optional and if set will override the properties set in

the infer config file.

[primary-gie]
enable=1
gpu-id=0
model-engine-file=…/…/models/Primary_Detector/resnet10.caffemodel_b4_gpu0_int8.engine
batch-size=4
#Required by the app for OSD, not a plugin property
bbox-border-color0=1;0;0;1
bbox-border-color1=0;1;1;1
bbox-border-color2=0;0;1;1
bbox-border-color3=0;1;0;1
interval=0
gie-unique-id=1
nvbuf-memory-type=0
config-file=config_infer_primary.txt

[tracker]
enable=1

For NvDCF and NvDeepSORT tracker, tracker-width and tracker-height must be a multiple of 32, respectively

tracker-width=640
tracker-height=384
ll-lib-file=/opt/nvidia/deepstream/deepstream/lib/libnvds_nvmultiobjecttracker.so

ll-config-file required to set different tracker types

ll-config-file=config_tracker_IOU.yml

ll-config-file=config_tracker_NvSORT.yml

ll-config-file=config_tracker_NvDCF_perf.yml

ll-config-file=config_tracker_NvDCF_accuracy.yml

ll-config-file=config_tracker_NvDeepSORT.yml

gpu-id=0
enable-batch-process=1
enable-past-frame=1
display-tracking-id=1

[secondary-gie0]
enable=0
model-engine-file=…/…/models/Secondary_VehicleTypes/resnet18.caffemodel_b16_gpu0_int8.engine
gpu-id=0
batch-size=16
gie-unique-id=4
operate-on-gie-id=1
operate-on-class-ids=0;
config-file=config_infer_secondary_vehicletypes.txt

[secondary-gie1]
enable=0
model-engine-file=…/…/models/Secondary_CarColor/resnet18.caffemodel_b16_gpu0_int8.engine
batch-size=16
gpu-id=0
gie-unique-id=5
operate-on-gie-id=1
operate-on-class-ids=0;
config-file=config_infer_secondary_carcolor.txt

[secondary-gie2]
enable=0
model-engine-file=…/…/models/Secondary_CarMake/resnet18.caffemodel_b16_gpu0_int8.engine
batch-size=16
gpu-id=0
gie-unique-id=6
operate-on-gie-id=1
operate-on-class-ids=0;
config-file=config_infer_secondary_carmake.txt

[tests]
file-loop=0

There are some problems in your config file. You can set [sink0],[sink1]… instead of two same [sink0].
You can just attach the txt file and outputvideo_303_transformed.mp4 as a attachment.

o sry, I didn’t use the first sink, pasted there by mistake. with one sink the issues are still there

OK. The latency here is just for 1 frame and the fps is an average value. So the value of latency may have jitter.

yeah, so I wrote a script to process the output of the measurement and the average latency for nvv4l2decoder0 component is still 66ms. Which is not suppose to be this high since if I’m trying to get a video output the fps performance is 150 fps.

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks

Could you attach your original log? Below are the results from my end:

PTS

**PERF: FPS 0 (Avg)
**PERF: 0.00 (0.00)
**PERF: 0.00 (0.00)
**PERF: 295.10 (287.50)
**PERF: 233.39 (250.36)
**PERF: 115.94 (197.39)
**PERF: 112.09 (172.43)
**PERF: 120.14 (160.78)
**PERF: 119.86 (153.35)
**PERF: 119.95 (148.20)
**PERF: 119.93 (144.44)
**PERF: 111.11 (140.50)
**PERF: 119.85 (138.34)
**PERF: 119.92 (136.58)

v4l2 latency

component latency= 0.238770
component latency= 2.058105
component latency= 3.152100
component latency= 1.996094
component latency= 1.995117
component latency= 1354.277100
component latency= 0.310059
component latency= 0.008057
component latency= 0.137207
component latency= 2.328125
component latency= 10.677979
component latency= 0.144043
component latency= 0.177002
component latency= 0.201172
component latency= 11.682129
component latency= 0.040039
component latency= 1.471924
component latency= 1.305908
component latency= 9.652832
component latency= 0.940918
component latency= 1.357910
component latency= 0.111084
component latency= 9.866943
component latency= 0.110107
component latency= 0.841064
component latency= 1.495117
component latency= 9.775879
component latency= 0.111084
component latency= 0.937988
component latency= 1.348145
component latency= 10.800049
component latency= 0.168945
component latency= 0.862061
component latency= 1.401855
component latency= 15.879883
component latency= 1.270996
component latency= 1.674072
component latency= 0.341064
component latency= 11.329102
component latency= 0.956055
component latency= 1.498047
component latency= 0.111084
component latency= 10.989990
component latency= 0.113037
component latency= 0.998047
component latency= 1.648926
component latency= 10.697998
component latency= 0.125977
component latency= 0.909912
component latency= 1.546875
component latency= 11.383057
component latency= 0.141113
component latency= 0.866943
component latency= 1.487061
component latency= 11.657959
component latency= 0.190918
component latency= 0.939941
component latency= 1.510986
component latency= 11.081055
component latency= 0.243164
component latency= 0.887939
component latency= 1.582031
component latency= 11.661133
component latency= 1.125000
component latency= 1.518066
component latency= 0.467041
component latency= 10.274170
component latency= 0.105957
component latency= 0.940918
component latency= 0.157959
component latency= 12.100098
component latency= 0.171143
component latency= 0.960205
component latency= 1.637939
component latency= 11.192139
component latency= 1.147949
component latency= 1.524902
component latency= 0.065186
component latency= 12.062012
component latency= 0.827881
component latency= 1.465088
component latency= 5.177979
component latency= 5.448975
component latency= 0.041992
component latency= 1.049072
component latency= 3.783936
component latency= 9.055908
component latency= 0.217041
component latency= 1.023926
component latency= 1.738037
component latency= 9.188965
component latency= 0.111084
component latency= 1.000977
component latency= 1.685059
component latency= 9.606934
component latency= 0.147949
component latency= 2.568115
component latency= 0.102051
component latency= 9.812012
component latency= 0.123047
component latency= 1.167969
component latency= 1.795898
component latency= 10.170166
component latency= 0.101074
component latency= 0.082031
component latency= 7.146973
component latency= 5.921143
component latency= 0.052002
component latency= 2.728027
component latency= 0.069092
component latency= 10.075928
component latency= 0.127930
component latency= 1.014893
component latency= 1.882080
component latency= 9.971191
component latency= 1.138184
component latency= 1.676025
component latency= 4.578857
component latency= 6.243896
component latency= 0.081055
component latency= 1.153809
component latency= 1.676025
component latency= 10.410889
component latency= 0.065918
component latency= 1.132080
component latency= 1.760986
component latency= 9.960938
component latency= 0.074951
component latency= 1.125000
component latency= 1.729980
component latency= 10.185059
component latency= 0.105957
component latency= 1.241943
component latency= 1.868896
component latency= 10.417969
component latency= 0.089844
component latency= 1.351074
component latency= 1.896973
component latency= 10.519043
component latency= 0.138184
component latency= 1.310791
component latency= 1.895020
component latency= 10.780029
component latency= 0.069092
component latency= 3.111816
component latency= 0.012939
component latency= 10.604980
component latency= 0.172119
component latency= 3.027100
component latency= 0.174072
component latency= 10.034912
component latency= 0.099854
component latency= 3.079102
component latency= 0.076172
component latency= 10.701904
component latency= 0.162842
component latency= 3.009033
component latency= 0.110107
component latency= 11.139893
component latency= 0.135010
component latency= 1.274170
component latency= 1.972168
component latency= 10.625000
component latency= 0.137207
component latency= 3.205078
component latency= 0.074951
component latency= 10.360107
component latency= 0.154053
component latency= 1.356201
component latency= 1.922119
component latency= 10.720947
component latency= 0.085205
component latency= 1.351074
component latency= 2.015869
component latency= 10.290039
component latency= 0.139160
component latency= 1.293945
component latency= 1.908936
component latency= 10.059814
component latency= 0.070068
component latency= 1.397949
component latency= 1.905029
component latency= 10.724854
component latency= 0.108887
component latency= 1.485840
component latency= 1.926025
component latency= 10.436035
component latency= 0.113037
component latency= 1.333008
component latency= 1.979980
component latency= 10.854980
component latency= 0.162842
component latency= 1.332031
component latency= 1.978027
component latency= 10.641113
component latency= 0.136963
component latency= 1.395996
component latency= 1.876953
component latency= 10.380127
component latency= 3.395020
component latency= 0.396973
component latency= 1.487061
component latency= 10.912109
component latency= 0.051025
component latency= 1.355957
component latency= 2.112061
component latency= 11.059082
component latency= 0.105957
component latency= 0.260986
component latency= 1.211914
component latency= 12.614014
component latency= 0.070068
component latency= 0.146973
component latency= 3.022949
component latency= 12.116943
component latency= 0.251953
component latency= 1.146973
component latency= 1.735107
component latency= 11.466064
component latency= 0.170898
component latency= 1.158936
component latency= 1.640869
component latency= 9.599854
component latency= 0.011963
component latency= 1.198975
component latency= 1.833984
component latency= 10.352051
component latency= 1.039062
component latency= 1.609131
component latency= 0.058105
component latency= 10.196045
component latency= 0.269043
component latency= 0.133057
component latency= 1.156006
component latency= 11.604980
component latency= 0.109131
component latency= 1.180176
component latency= 1.869873
component latency= 10.502197
component latency= 0.106934
component latency= 1.121094
component latency= 2.159180
component latency= 10.172119
component latency= 0.059814
component latency= 3.083984
component latency= 0.077148
component latency= 10.835938
component latency= 1.434082
component latency= 3.342041
component latency= 3.543213
component latency= 10.579102
component latency= 0.122070
component latency= 1.147949
component latency= 1.982910
component latency= 9.819824
component latency= 1.351074
component latency= 0.105957
component latency= 1.766113
component latency= 8.959961
component latency= 0.145020
component latency= 1.152832
component latency= 1.658936
component latency= 9.637939
component latency= 0.140869
component latency= 2.647949
component latency= 0.125977
component latency= 9.687012
component latency= 0.149170
component latency= 2.611816
component latency= 0.229004
component latency= 10.709961
component latency= 0.180176
component latency= 1.110107
component latency= 1.755859
component latency= 10.500000
component latency= 0.112061
component latency= 2.797119
component latency= 0.114990
component latency= 10.244141
component latency= 0.098145
component latency= 1.100098
component latency= 2.080078
component latency= 10.281982
component latency= 0.107910
component latency= 2.607910
component latency= 0.024170
component latency= 10.938965
component latency= 0.151123
component latency= 1.157959
component latency= 1.724121
component latency= 10.687988
component latency= 0.166016
component latency= 0.992920
component latency= 3.334961
component latency= 8.155029
component latency= 0.119141
component latency= 1.018066
component latency= 1.700928
component latency= 9.143066
component latency= 0.118896
component latency= 0.154053
component latency= 2.729004
component latency= 10.608887
component latency= 1.153076
component latency= 1.587891
component latency= 0.175781
component latency= 10.572021
component latency= 1.072998
component latency= 1.588867
component latency= 0.067871
component latency= 10.554932
component latency= 0.066162
component latency= 0.114990
component latency= 4.417969
component latency= 8.114990
component latency= 0.218018
component latency= 0.111084
component latency= 0.136963
component latency= 9.614990
component latency= 0.127930
component latency= 0.117188
component latency= 1.321045
component latency= 12.704102
component latency= 0.053955
component latency= 0.163086
component latency= 4.492920
component latency= 7.114014
component latency= 0.138916
component latency= 0.085938
component latency= 2.956055
component latency= 7.773926
component latency= 0.093018
component latency= 1.569824
component latency= 0.068115
component latency= 13.585205
component latency= 0.156006
component latency= 0.113037
component latency= 0.092041
component latency= 26.715088
component latency= 0.219238
component latency= 0.135010
component latency= 1.398926
component latency= 31.367920
component latency= 0.089844
component latency= 0.121094
component latency= 4.314941
component latency= 28.556152
component latency= 0.180908
component latency= 0.077881
component latency= 0.114014
component latency= 32.386963
component latency= 0.177979
component latency= 0.113037
component latency= 1.342041
component latency= 31.481934
component latency= 0.138916
component latency= 0.139893
component latency= 1.418945
component latency= 30.782959
component latency= 0.107910
component latency= 0.147949
component latency= 0.120117
component latency= 32.675049
component latency= 0.058105
component latency= 0.183105
component latency= 0.135986
component latency= 32.377930
component latency= 0.153076
component latency= 0.102783
component latency= 0.111816
component latency= 32.802002
component latency= 0.042969
component latency= 0.140137
component latency= 2.808105
component latency= 30.489990
component latency= 0.153809
component latency= 0.247070
component latency= 0.125977
component latency= 32.637939
component latency= 0.145020
component latency= 0.246826
component latency= 1.335938
component latency= 31.239990
component latency= 0.041992
component latency= 0.198975
component latency= 1.725098
component latency= 30.944824
component latency= 0.162842
component latency= 0.274902
component latency= 0.132080
component latency= 32.271973
component latency= 0.114990
component latency= 0.157959
component latency= 1.226807
component latency= 31.506836
component latency= 0.062988
component latency= 1.562012
component latency= 0.044922
component latency= 31.149170
component latency= 0.062988
component latency= 0.127930
component latency= 0.139893
component latency= 33.066162
component latency= 0.147217
component latency= 0.140869
component latency= 2.024170
component latency= 30.222900
component latency= 0.120117
component latency= 0.161865
component latency= 4.312012
component latency= 28.393066
component latency= 0.151855
component latency= 0.175049
component latency= 0.197998
component latency= 32.385986
component latency= 0.124023
component latency= 0.181885
component latency= 0.309082
component latency= 32.313965
component latency= 0.159912
component latency= 0.095947
component latency= 0.188965
component latency= 32.983154
component latency= 0.153076
component latency= 0.109863
component latency= 0.325928
component latency= 32.227051
component latency= 0.090088
component latency= 0.079102
component latency= 0.153076
component latency= 32.783936
component latency= 0.070068
component latency= 0.193115
component latency= 2.739990
component latency= 27.804932
component latency= 2.006836
component latency= 0.134766
component latency= 0.124023
component latency= 30.398926
component latency= 1.614990
component latency= 0.068115
component latency= 2.980957
component latency= 30.043213
component latency= 0.217041
component latency= 0.128174
component latency= 0.323975
component latency= 32.697998
component latency= 0.057129
component latency= 2.959961
component latency= 0.089844
component latency= 30.346924
component latency= 0.090820
component latency= 0.074951
component latency= 0.072021
component latency= 32.616943
component latency= 0.072998
component latency= 0.057861
component latency= 4.616943
component latency= 27.775879
component latency= 0.094971
component latency= 1.494141
component latency= 0.128906
component latency= 31.079102
component latency= 0.168945
component latency= 0.060791
component latency= 0.081055
component latency= 33.139893
component latency= 0.176025
component latency= 0.135986
component latency= 1.469971
component latency= 31.087158
component latency= 0.279053
component latency= 0.050049
component latency= 0.090088
component latency= 32.839111
component latency= 0.015869
component latency= 0.118164
component latency= 4.503906
component latency= 35.025879
component latency= 0.028076
component latency= 0.086914
component latency= 3.376953
component latency= 33.864990
component latency= 33.992920
component latency= 0.088867
component latency= 3.405029
component latency= 51.955811
component latency= 0.646973
component latency= 0.241943
component latency= 3.291992
component latency= 0.135010
component latency= 42.165039
component latency= 0.087891
component latency= 3.329102
component latency= 0.091064
component latency= 14.916992
component latency= 32.306152
component latency= 0.466797
component latency= 0.558838
component latency= 0.729980
component latency= 45.887939
component latency= 0.140137
component latency= 0.121094
component latency= 0.239990
component latency= 18.594971
component latency= 42.043945
component latency= 0.020020
component latency= 0.124023
component latency= 0.049072
component latency= 23.944824
component latency= 33.570801
component latency= 0.174072
component latency= 0.074951
component latency= 0.786133
component latency= 31.927002
component latency= 0.198975
component latency= 0.128174
component latency= 0.916016
component latency= 31.773926
component latency= 0.124023
component latency= 0.137939
component latency= 0.388916
component latency= 32.322021
component latency= 0.163818
component latency= 0.160156
component latency= 1.361084
component latency= 31.504883
component latency= 0.206055
component latency= 0.150879
component latency= 1.368164
component latency= 31.476074
component latency= 0.191162
component latency= 0.273193
component latency= 0.895996
component latency= 31.952881
component latency= 0.171143
component latency= 0.102051
component latency= 0.872070
component latency= 31.776855
component latency= 0.009033
component latency= 4.088867
component latency= 0.031006
component latency= 28.935059
component latency= 0.229004
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component latency= 0.075195
component latency= 5.156006
component latency= 26.868164
component latency= 0.073975
component latency= 0.067871
component latency= 5.110840
component latency= 28.092041
component latency= 28.261963
component latency= 0.111084
component latency= 5.252930
component latency= 27.843018
component latency= 0.054932
component latency= 0.091064
component latency= 5.131836
component latency= 27.239990
component latency= 0.078125
component latency= 2.635010
component latency= 0.101074
component latency= 29.869141
component latency= 0.150879
component latency= 0.112793
component latency= 0.125000
component latency= 32.541992
component latency= 0.154053
component latency= 0.203125
component latency= 4.708008
component latency= 27.923096
component latency= 0.113037
component latency= 0.178955
component latency= 2.374023
component latency= 30.936035
component latency= 0.138916
component latency= 0.187988
component latency= 0.166016
component latency= 32.996094
component latency= 0.237061
component latency= 0.108887
component latency= 0.141846
component latency= 32.611084
component latency= 0.157959
component latency= 0.124023
component latency= 2.421143
component latency= 30.464111
component latency= 0.104980
component latency= 0.317139
component latency= 0.421143
component latency= 33.242920
component latency= 33.810059

The average of the latency is 8ms, the average of the fps is 119. It’s basically matched.

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