systemtap for ixgbe driver on Fedora

systemtap for ixgbe driver on Fedora

[Carol Liu - Sun Microsystems - Beijing China]

Hi :
I  tried to trace some function the driver/net ixgbe by systemtap, but 
it always fails with following errors:
[root@petpig demo]# lsmod|grep ixgbe
ixgbe                 106084  1
dca                     5152  1 ixgbe
mdio                    3772  1 ixgbe

[root@petpig demo]# cat ixgbe.stp
probe kernel.function("ixgbe_fcoe_ddp_put") { log ("enter") }
probe kernel.function("ixgbe_fcoe_ddp_put").return { log ("exit") }

[root@petpig demo]# stap -v ixgbe.stp
Pass 1: parsed user script and 59 library script(s) in 
150usr/10sys/166real ms.
semantic error: no match while resolving probe point 
kernel.function("ixgbe_fcoe_ddp_put")
semantic error: no match while resolving probe point 
kernel.function("ixgbe_fcoe_ddp_put").return
Pass 2: analyzed script: 0 probe(s), 0 function(s), 0 embed(s), 0 
global(s) in 420usr/30sys/458real ms.
Pass 2: analysis failed.  Try again with another '--vp 01' option.

root@petpig demo]# stap -V
SystemTap translator/driver (version 0.9.9/0.141 non-git sources)
Copyright (C) 2005-2009 Red Hat, Inc. and others
This is free software; see the source for copying conditions.

The self-build kernel version is 2.6.31.

Anyone give me some hint ?  really really appreciate that. :)

/Carol

Re: systemtap for ixgbe driver on Fedora

[Wenji Huang]

Carol Liu - Sun Microsystems - Beijing China wrote:
> Hi :
> I  tried to trace some function the driver/net ixgbe by systemtap, but 
> it always fails with following errors:
> [root@petpig demo]# lsmod|grep ixgbe
> ixgbe                 106084  1
> dca                     5152  1 ixgbe
> mdio                    3772  1 ixgbe
> 
> [root@petpig demo]# cat ixgbe.stp
> probe kernel.function("ixgbe_fcoe_ddp_put") { log ("enter") }
> probe kernel.function("ixgbe_fcoe_ddp_put").return { log ("exit") }

Seems ixgbe_fcoe_ddp_put is in separate module, not vmlinux.

Try probe module("ixgbe").function("ixgbe_fcoe_ddp_put")

Regards,
Wenji

Re: systemtap for ixgbe driver on Fedora

[Carol Liu - Sun Microsystems - Beijing China]

Hi wenji:
Really thanks, it works well :)
/Carol

Wenji Huang wrote :
> Carol Liu - Sun Microsystems - Beijing China wrote:
>> Hi :
>> I  tried to trace some function the driver/net ixgbe by systemtap, 
>> but it always fails with following errors:
>> [root@petpig demo]# lsmod|grep ixgbe
>> ixgbe                 106084  1
>> dca                     5152  1 ixgbe
>> mdio                    3772  1 ixgbe
>>
>> [root@petpig demo]# cat ixgbe.stp
>> probe kernel.function("ixgbe_fcoe_ddp_put") { log ("enter") }
>> probe kernel.function("ixgbe_fcoe_ddp_put").return { log ("exit") }
>
> Seems ixgbe_fcoe_ddp_put is in separate module, not vmlinux.
>
> Try probe module("ixgbe").function("ixgbe_fcoe_ddp_put")
>
> Regards,
> Wenji