Pylon for ROS FPS [pylon_camera]

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Hi, I am using a Basler GigE aca-640-120mg camera and interfacing it with a ros package called Kinefly. to get the image, I am using another package to interface pylon drivers with ros. However, I am getting a low frame rate for very low values of exposure (55 fps with 100 micro second exposure). In theory, I should be getting almost 120 fps.

I was wondering if anyone has an idea of how to proceed with this problem to get the desired frame rate.

Changing exposure does not seem to change frame rate, and my ethernet card should be fast enough to support such data transfer. I have tried adjusting mtu_size and inter package delay also to no avail.

Note: I started out with ros very recently.