The output of clib_warning() call should be in the syslog. If running vpp in Ubuntu, take a look in /var/log/syslog. -John
From: vpp-dev-boun...@lists.fd.io [mailto:vpp-dev-boun...@lists.fd.io] On Behalf Of Alessio Silvestro Sent: Thursday, June 01, 2017 12:11 PM To: Luke, Chris <chris_l...@comcast.com> Cc: vpp-dev@lists.fd.io Subject: Re: [vpp-dev] VPP Node Debug I knew VPP run in user space and that printk is not the best option, however from the documentation it is not clear to me how to do that. For example now I inserted the command clib_warning("I am here!") in the node I create -- that from vppctl show trace I can see processes the packets. Where does it prints? Still I cannot figure it out. Thanks, Alessio On Thu, Jun 1, 2017 at 6:00 PM, Luke, Chris <chris_l...@comcast.com<mailto:chris_l...@comcast.com>> wrote: printk() is typically a kernel thing, no? This isn’t kernel code. 😊 If you just want stuff on the console when running in a debugger, or interactively, clib_warning() may be what you are looking for. Chris. From: vpp-dev-boun...@lists.fd.io<mailto:vpp-dev-boun...@lists.fd.io> [mailto:vpp-dev-boun...@lists.fd.io<mailto:vpp-dev-boun...@lists.fd.io>] On Behalf Of Alessio Silvestro Sent: Thursday, June 1, 2017 10:35 To: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: [vpp-dev] VPP Node Debug Hi all, I am using this code "https://gerrit.fd.io/r/#/c/6721/"; to in order to enable an external process to receive UDP packets. I tried to use printk -- including module.h in the c file. When I compile VPP with: TOPDIR/vpp make build-release I got the following error fatal error: linux/module.h: No such file or directory compilation terminated. Do you have any idea why? Is there a better way to debug the code of a node in VPP? Thanks, Alessio
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