topic Kernel Trace and/or Debug Tools ? in Software Archive

Kernel Trace and/or Debug Tools ?

Wendy__C_ — Mon, 03 Dec 2012 20:50:48 GMT

1. Will general Linux tools such as SystemTap, Kdump, or Kernel Debugger be availble or ported to MIC ?

2. Is there a document to describe kSCIF interface/API ?

Thanks,

Wendy

I'm trying to get a more

Frances_R_Intel — Tue, 04 Dec 2012 20:06:00 GMT

I'm trying to get a more complete answer for you but what I have so far is that the Kernel Debugger is on the feature request list. As far as the kSCIF information, under /opt/intel/mic/scif/docs, on the host for the coprocessor,there are both kernel and user API manuals.

Thanks .. I'm more familiar

Wendy__C_ — Tue, 04 Dec 2012 21:24:34 GMT

Thanks .. I'm more familiar with general mailing list posting ... not sure how this forum thing works. Hopefully this reply will reach a right place. I would imagine the "kdump" or "system tap" would be easier than kernel debugger ? Doing kernel works on MIC, my current (and most significant) difficulty is kernel crash/panic. It has to use the "printk" type of tracing - taking numerous build-reload cycles to figure out where the system crashes. It is more than tedious. -- Wendy

MIC kernel does have CONFIG

Wendy__C_ — Mon, 10 Dec 2012 23:02:59 GMT

MIC kernel does have CONFIG_CRASH_DUMP enabled. its kdump files show up in host's /var/crash/mic/ directory. Now all I need is to find the corresponding vmlinux file. Could someone pass info on how to rebuild (and/or obtain) the vmlinux file to read these dumps ? Great Thanks, Wendy

Try /lib/firmware/mic/vmlinux

Frances_R_Intel — Mon, 10 Dec 2012 23:40:01 GMT

Try /lib/firmware/mic/vmlinux. Is that what you need? If you need to recompile the kernel, you will need the MPSS tar file, but I'm not sure the full kernel code is there.

The "vmlinux" file works well

Wendy__C_ — Wed, 12 Dec 2012 17:55:24 GMT

The "vmlinux" file works well. Now I know where exactly the kmod crashes :) ... Great Thanks, Wendy