topic Re: What is the current kernel debug buffer size? in Firewall and Security Management

What is the current kernel debug buffer size?

kamilazat — Tue, 26 Nov 2024 13:05:26 GMT

Hi everyone.

Admin Guides state that the maximum supported buffer size is 8192k. But I also saw in some non-official websites that it is 32M.

Was it 32M before and it was reduced to 8M? Or the values are different for different debugs?

Cheers!

Re: What is the current kernel debug buffer size?

_Val_ — Tue, 26 Nov 2024 13:09:33 GMT

The debug buffer in R8X versions is allocated per FW core instance. It's maximum is 8192K. In the previous versions the allocation was global, which is no longer relevant.

Re: What is the current kernel debug buffer size?

kamilazat — Tue, 26 Nov 2024 13:10:19 GMT

Fast and efficient! Thank you!

Re: What is the current kernel debug buffer size?

the_rock — Tue, 26 Nov 2024 13:27:58 GMT

You can also refer to below.

Andy

https://sc1.checkpoint.com/documents/R80.30/WebAdminGuides/EN/CP_R80.30_QoS_AdminGuide/html_frameset.htm?topic=documents/R80.30/WebAdminGuides/EN/CP_R80.30_QoS_AdminGuide/202665

Re: What is the current kernel debug buffer size?

Timothy_Hall — Tue, 26 Nov 2024 14:59:26 GMT

Also be aware that starting in R82, there is a new underlying debug mechanism (ndebug) for gateways with 72+ cores present:

https://sc1.checkpoint.com/documents/R82/WebAdminGuides/EN/CP_R82_PerformanceTuning_AdminGuide/Content/Topics-PTG/Kernel-Debug/Kernel-Debug-Syntax.htm#NewKernelDebugBehavior

Re: What is the current kernel debug buffer size?

kamilazat — Wed, 27 Nov 2024 06:21:24 GMT

Yes, I noticed that while checking the buffer size in R82. And if I understand correctly, it reduces the usage of system resources while debugging. Although I'm not sure why they separated ndebug and kdebug by 72 cores. Wouldn't ndebug help if I had a GW with less than 72 cores but a busy one? Maybe there is a detail that I'm not aware yet.