On Fri, Sep 11, 2009 at 2:25 PM, Denis Kirjanov <kirjanov@xxxxxxxxx> wrote: > Hi dear list. > I encountered the following problem: from time to time I see a delay when > booting the kernel (~30s). It doesn't happen regularly. exactly this line "from time to time...i see a delay"....is what CONFIG_BOOT_TRACER is trying to solve!!!!! it is an amazing feature..... http://prefetch.net/blog/index.php/2009/03/29/linux-boot-tracing-in-the-linux-2628-kernel/ but as mentioned above link - it is from 2.6.28 and above, and u have to recompile the kernel with this turned on, as it is not turned on by default. >From kernelnewbie website: http://kernelnewbies.org/Linux_2_6_28#head-c55522a93da905261246a78a2d900c3e6b6c0a5a 1.6. Boot tracer The purpose of this tracer is to helps developers to optimize boot times: it records the timings of the initcalls. Its aim is to be parsed by the scripts/bootgraph.pl tool to produce graphics about boot inefficiencies, giving a visual representation of the delays during initcalls. Users need to enable CONFIG_BOOT_TRACER, boot with the "initcall_debug" and "printk.time=1" parameters, and run "dmesg | perl scripts/bootgraph.pl > output.svg" to generate the final data. Code: (commit 1, 2, 3, 4, 5, 6) > I would like to ask you for advice as to what may be the reason for such > behavior? > > Latter on I can attach kernel boot log and config. > > -- > Regards, > Denis > -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
