[lttng-dev] 答复:答复: Can lttng support kernel function tracer

2015-02-17 Thread zhenyu.ren
> I think that might be a usecase for a profiler rather than a usecase for a > tracer I am sorry that I have misled you.Not all write instances(a chance in a million) take 100ms+ to complete.So I have to trace all write instances to capture the deviant ones. Thanks zhenyu.ren ---

Re: [lttng-dev] lttng-tracer missing

2015-02-17 Thread Nathan Lynch
On 02/17/2015 11:02 AM, Neil Bryan wrote: > Following the bitbake build I see these kernel modules in the build > output directory: > > ./altera-image-1.0-r0/rootfs/lib/modules/3.7.0/kernel/lttng-modules/lib/lib-ring-buffer.ko > ./altera-image-1.0-r0/rootfs/lib/modules/3.7.0/kernel/lttng-modules/l

[lttng-dev] lttng-tracer missing

2015-02-17 Thread Neil Bryan
Hello Forum, I am having a few problems enabling LTTng kernel tracing. I am using Yocto on an Alter SOC FPGA platform. I have added the following to local.conf to bring in the required packages: EXTRA_IMAGE_FEATURES = "debug-tweaks tools-debug tools-profile" PACKAGE_DEBUG_SPLIT_STYLE = 'debug-fi

Re: [lttng-dev] 答复: Can lttng support kernel function tracer

2015-02-17 Thread Francis Deslauriers
CCing lttng-dev back in the thread. I might be wrong but I think that might be a usecase for a profiler rather than a usecase for a tracer. Can someone else confirm? To do that kind of work, you could compile your kernel with gprof support. Thanks, Francis On Tue, Feb 17, 2015 at 3:38 AM, zheny