[dpdk-dev] How to dump DPDK log?

[Ferruh Yigit]

On 5/17/2018 3:41 AM, Sam wrote:
> Oh, it should be user1,8 in dpdk-17.05

Yes, loglevel numbers are converted to more human readable format in this
release, old releases are using numbers.

> 
> OMG....
> 
> 2018-05-17 10:26 GMT+08:00 Sam <batmanustc at gmail.com <mailto:batmanustc at gmail.com>>:
> 
>     How to set this param...
> 
>     I use this, but report me bug:
> 
>     sudo /usr/local/bin/ovs-vsctl --no-wait set Open_vSwitch .
>     other_config:dpdk-extra="--log-level=user1,debug -c 0x40004 -n 4
>     --socket-mem 1024 -w 0000:01:00.0 -w 0000:01:00.1"
> 
>     Bug:
> 
>     2018-05-17T02:23:21.878Z|00010|dpdk|INFO|EAL ARGS: ovs-vswitchd
>     --log-level=user1,debug -c 0x40004 -n 4 --socket-mem 1024 -w 0000:01:00.0 -w
>     0000:01:00.1
>     2018-05-17T02:23:21.878Z|00011|dpdk|ERR|EAL: invalid parameters for --log-level
>     2018-05-17T02:23:21.879Z|00012|dpdk|INFO|EAL: Detected 32 lcore(s)
>     2018-05-17T02:23:21.879Z|00013|dpdk|ERR|EAL: invalid parameters for --log-level
> 
>     2018-05-17T02:23:04.374Z|00010|dpdk|INFO|EAL ARGS: ovs-vswitchd
>     --log-level="user1,debug" -c 0x40004 -n 4 --socket-mem 1024 -w 0000:01:00.0
>     -w 0000:01:00.1
>     2018-05-17T02:23:04.374Z|00011|dpdk|ERR|EAL: invalid parameters for --log-level
>     2018-05-17T02:23:04.375Z|00012|dpdk|INFO|EAL: Detected 32 lcore(s)
>     2018-05-17T02:23:04.375Z|00013|dpdk|ERR|EAL: invalid parameters for --log-level
> 
>     2018-05-16 21:29 GMT+08:00 Ferruh Yigit <ferruh.yigit at intel.com
>     <mailto:ferruh.yigit at intel.com>>:
> 
>         On 5/16/2018 9:30 AM, Sam wrote:
>         > I want DPDK VHOST module DEBUG level log
>         >
>         > 2018-05-16 16:27 GMT+08:00 Sam <batmanustc at gmail.com
>         <mailto:batmanustc at gmail.com>>:
>         >
>         >> Hi all,
>         >>
>         >> I'm debugging OVS2.9.0 and DPDK18.02, I found I could not dump DPDK log
>         >> like vhost module.
>         >>
>         >> How can I dump DPDK log into files? Thank you~
>         >>
> 
>         (Unfortunately) vhost module doesn't register its log type but uses
>         USER1 log
>         type [1].
> 
>         Need to set user1 log type to debug, following eal parameter should work:
>         --log-level="user1,debug"
> 
>         Same can be done with logging related APIs by application
> 
> 
>         [1]
>         https://dpdk.org/browse/dpdk/tree/lib/librte_vhost/vhost.h?h=v18.05-rc4#n351
>         <https://dpdk.org/browse/dpdk/tree/lib/librte_vhost/vhost.h?h=v18.05-rc4#n351>
> 
> 
>