Re: Missing location information for drivers
William Cohen <[email protected]>
| Newsgroups | gmane.linux.oprofile |
|---|---|
| Message-ID | <[email protected]> |
On 01/20/2017 02:58 PM, Balavinayagam Samynathan wrote: > Hi , > Hi Bala, So the dma_driver is being compiled separately from the kernel? > I am profiling a dma_driver (dma_driv.ko module) in Ubuntu 14.04 (kernel version 3.13.0-32-generic). > For opreport and opannotate I use the -p option to point to the driver module. The driver code exists in the same directory, but I still see "*no location information" *next to the driver > For opannotate I also used the following options > > """ > /opannotate --source --base-dirs=/root/rdma_driver/linux/ --search-dirs=/root/dma_driver/linux/ -p /root/dma_driver/linux/ ./testDriver/ > """ Are there two directories, /root/rdma_driver and /root/dma_drivers? Check that the driver does have the debug info in it. Something like the following with dma_driv.ko replaced with approriate name readelf --debug-dump=line dma_driv.ko The above command should provide a bunch of information if there is debuginfo in the driver. Is there a similarly named kernel driver elsewhere that could be causing confusion for oprofile? Is the kernel driver in /root/dma_driver/linux or some subdirectory of that? It might be wise to verify tha "-p /root/dma_driver/linux" is the correct directory and contains dma_driv.ko. -Will > > I did get the debug version of the kernel and I can see the opreport on individual functions in the kernel. Only location information for my driver module is not found. > I compiled my driver with "*-g*" option and placed them under > > """ > //usr/lib/debug/lib/modules/3.13.0-32-generic/kernel/drivers/dma_driver/ > """ > > But I am still getting "(no location information)" next to my driver functions > > -- > Thanks in advance > Bala > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > > > > _______________________________________________ > oprofile-list mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/oprofile-list > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot