[dpdk-dev] Reg DPDK EAL log-level=8 options is not throwing any DEBUG messages in /var/log/messages

[Shanmugasundaram M]

can i use

./sources/dpdk-18.11/drivers/net/vmxnet3/vmxnet3_ethdev.c:1422:
rte_log_set_level(vmxnet3_logtype_driver, RTE_LOG_WARNING);
after  EAL driver routine completes ( pci_common.c, etc) its initialization
? Please let me know where do i need  to call  rte_log_set_level() in EAL
driver init completion function?

regards,
Shanmugasundaram M

On Wed, Mar 10, 2021 at 11:55 PM Stephen Hemminger <
stephen at networkplumber.org> wrote:

> On Wed, 10 Mar 2021 23:49:17 +0530
> Shanmugasundaram M <shansirtt at gmail.com> wrote:
>
> > THanks Steven for the quick response.  I want to enable  EAL module
> > (complete logging at debug level ) only during bootup of fastpath. Once
> > bootup is done, i want to move this module log-level to default/
> original.
> > Currently I'm using     --log-level='.*',8  along with
> > ./sources/fp/common/fp-var.h  [ #define FP_LOG_DEFAULT FP_LOG_DEBUG ]
> > instead of [ #define FP_LOG_DEFAULT FP_LOG_ERR ]. refer below snip
> > <snip>
> > -#define FP_LOG_DEFAULT FP_LOG_ERR
> > +#define FP_LOG_DEFAULT FP_LOG_DEBUG
> > The problem is its throwing all the other debug messages like this after
> > fastpath started. Any way to disable below message <snip3> and only log
> > bootup of EAL debug messages alone ?
> >
> > REgards,
> > Shanmugasundaram M
> >
> > <snip3>
> > ebug interface eth3 (port 3) is not operative
> > 2021-03-10T18:12:39+00:00 daemon infoblox.localdomain fp-rte[3611]: debug
> > packet m=0x36575b600 dropped at fp_process_input():178
> > 2021-03-10T18:12:39+00:00 daemon infoblox.localdomain fp-rte[3611]: info
> > fp_ether_input(ifp=eth1 port=1)
> > 2021-03-10T18:12:39+00:00 daemon infoblox.localdomain fp-rte[3611]: debug
> > ==== mbuf at [0x36866ee80]: 1 segment(s), len=60 port=1
> > 2021-03-10T18:12:39+00:00 daemon infoblox.localdomain fp-rte[3611]: debug
> >                  next=(nil) shared=0 flags=0x0
> > 2021-03-10T18:12:39+00:00 daemon infoblox.localdomain fp-rte[3611]: debug
> >     ol flags: 0x0 hash: 0x0
> > 2021-03-10T18:12:39+00:00 daemon infoblox.localdomain fp-rte[3611]: debug
> >     outer offloads:
> > 2021-03-10T18:12:39+00:00 daemon infoblox.localdomain fp-rte[3611]: debug
> >         l2: proto ETH hlen 14 flags
> >
> >
> >
> > On Wed, Mar 10, 2021 at 1:59 AM Stephen Hemminger <
> > stephen at networkplumber.org> wrote:
> >
> > > On Wed, 10 Mar 2021 00:30:24 +0530
> > > Shanmugasundaram M <shansirtt at gmail.com> wrote:
> > >
> > > > Dear Team,
> > > >
> > > > we are using 18.11.1-6WIND DPDK. we are trying to get EAL Debug
> messages
> > > > and we are not able to see any one from them in /var/log/messages.
> Kindly
> > > > let me know --log-level=8 is enough or --log-level=*8 is correct  OR
> > > > --log-level=eal,debug is correct ?
> > > > Appreciate your quick response.
> > > >
> > > > regards,
> > > > Shanmugasundaram M
> > >
> > > DPDK now has log-level on a per-feature level. The old log level was
> > > global.
> > > The legacy option is what you are using.
> > >
> > > The document is missing about log-level options.
> > >
> > > Now log-level takes three forms:
> > >     --log-level=regex,N
> > >     --log-level=pattern:N
> > >     --log-level=N
> > >
> > > The first takes a regular expressions so for example:
> > >      -log-level='pmd\..*,8'
> > > Would set logging at debug for Poll Mode Drivers.  Regex period
> > > is match all, not match period.
> > >
> > > The second form takes a shell style pattern (glob):
> > >     --log-level='pmd.net.*:debug'
> > > Sets debug log level for all Poll Mode Network drivers.
> > > All forms take numeric or symbolic names for logging levels in current
> > > versions
> > >
> > > The third form sets the global log level only.
> > >
> > > The actual logic around what gets logged or not is a union of
> > > the global and per-logtype argument. So if global log level is
> > > set high (like NOTICE) then no info or debug messages will get printed.
> > >
> > > In other words, --log-level=8 has no effect both because it only
> > > sets the global level (and the default global level already is 8).
> > >
> > > To turn on all logging. Just do --log-level='.*,8' (or similar)
> > >
> > >
> > >
> > >
> > >
>
> If you know what you want, then use a more restrictive log-level to get
> just the driver or a particular message type.
>