ArcGIS Runtime QML application running slower with latest RHEL kernels

Question

An application I've been developing in RHEL was running fine in RHEL 7.0 and 7.1. I've recently updated to RHEL 7.2 which upgraded the default kernel as well. I noticed that the application was now running noticeably slower. I then reverted to an older kernel and the application ran fine. I've been in contact with Red Hat and have sent them SOS reports, traces (ltrace and strace) and perf reports. They've identified 'libEsriRuntimeQt.so' as the potential cause of the slowdown. The application runs fine on the following "229" kernels:

kernel.x86_64         3.10.0-229.11.1.el7

kernel.x86_64         3.10.0-229.14.1.el7

kernel.x86_64         3.10.0-229.20.1.el7

And runs noticeably slower on the newer "327" kernels:

kernel.x86_64         3.10.0-327.el7

kernel.x86_64         3.10.0-327.3.1.el7

kernel.x86_64         3.10.0-327.4.4.el7

kernel.x86_64         3.10.0-327.4.5.el7

Anyone have any ideas on why 'libEsriRuntimeQt.so' runs slower on the new kernels?

Thanks!

Lucas Danzinger · Answer

Hi Rainer,

Pretty interesting, not sure what the cause would be. The best thing to do is probably to contact Esri support so they can set up reproducible test cases and compare the performance differences to narrow down where the issue may be.

-Luke