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https://github.com/seldridge/zscaler-load
Repository showing a Zscaler issue where high machine load causes a decrease in network bandwidtdh
https://github.com/seldridge/zscaler-load
Last synced: about 1 month ago
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Repository showing a Zscaler issue where high machine load causes a decrease in network bandwidtdh
- Host: GitHub
- URL: https://github.com/seldridge/zscaler-load
- Owner: seldridge
- License: apache-2.0
- Created: 2024-05-21T19:59:07.000Z (7 months ago)
- Default Branch: main
- Last Pushed: 2024-05-23T18:49:40.000Z (7 months ago)
- Last Synced: 2024-10-19T08:18:29.436Z (2 months ago)
- Language: Shell
- Size: 10.7 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
This is a script that can be used to generate a bunch of parallel processes.
This is intended to be used to show a bug in Zscaler on macOS where if too many
processes are running, then Zscaler will show a large drop in bandwidth.
The script `load-cpus.sh` allows loading up many parallel threads doing busy
work. This can be used on the command line to interactively show the problem.
The script `test.sh` uses `load-cpus.sh` to show a drop in bandwidth when
downloading a small 5MiB test file.
#### Example Output
The example below shows that loading the CPU with 32 processes causes download
speed to drop to 10% of unloaded bandwidth.
```
# ./test.sh
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 5120k 100 5120k 0 0 2659k 0 0:00:01 0:00:01 --:--:-- 2658k
real 0m1.946s
user 0m0.021s
sys 0m0.047s
[info] Forking 32 processes:
[info] - Process 1: 64835
[info] - Process 2: 64836
[info] - Process 3: 64837
[info] - Process 4: 64838
[info] - Process 5: 64839
[info] - Process 6: 64840
[info] - Process 7: 64841
[info] - Process 8: 64842
[info] - Process 9: 64843
[info] - Process 10: 64844
[info] - Process 11: 64845
[info] - Process 12: 64846
[info] - Process 13: 64847
[info] - Process 14: 64848
[info] - Process 15: 64849
[info] - Process 16: 64850
[info] - Process 17: 64851
[info] - Process 18: 64852
[info] - Process 19: 64853
[info] - Process 20: 64854
[info] - Process 21: 64855
[info] - Process 22: 64856
[info] - Process 23: 64857
[info] - Process 24: 64858
[info] - Process 25: 64859
[info] - Process 26: 64860
[info] - Process 27: 64861
[info] - Process 28: 64862
[info] - Process 29: 64863
[info] - Process 30: 64864
[info] - Process 31: 64865
[info] - Process 32: 64866
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 5120k 100 5120k 0 0 251k 0 0:00:20 0:00:20 --:--:-- 510k
real 0m20.373s
user 0m0.020s
sys 0m0.037s
[info] Killing all forked processes:
[info] - Killed 64835
[info] - Killed 64836
[info] - Killed 64837
[info] - Killed 64838
[info] - Killed 64839
[info] - Killed 64840
[info] - Killed 64841
[info] - Killed 64842
[info] - Killed 64843
[info] - Killed 64844
[info] - Killed 64845
[info] - Killed 64846
[info] - Killed 64847
[info] - Killed 64848
[info] - Killed 64849
[info] - Killed 64850
[info] - Killed 64851
[info] - Killed 64852
[info] - Killed 64853
[info] - Killed 64854
[info] - Killed 64855
[info] - Killed 64856
[info] - Killed 64857
[info] - Killed 64858
[info] - Killed 64859
[info] - Killed 64860
[info] - Killed 64861
[info] - Killed 64862
[info] - Killed 64863
[info] - Killed 64864
[info] - Killed 64865
[info] - Killed 64866
```