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* tracing/stack-tracer: introduce CONFIG_USER_STACKTRACE_SUPPORTTörök Edwin2008-11-231-1/+1
| | | | | | | | | | | | | Impact: cleanup User stack tracing is just implemented for x86, but it is not x86 specific. Introduce a generic config flag, that is currently enabled only for x86. When other arches implement it, they will have to SELECT USER_STACKTRACE_SUPPORT. Signed-off-by: Török Edwin <edwintorok@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* tracing/stack-tracer: fix style issuesTörök Edwin2008-11-231-1/+1
| | | | | | | Impact: cleanup Signed-off-by: Török Edwin <edwintorok@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* tracing: add support for userspace stacktraces in tracing/iter_ctrlTörök Edwin2008-11-231-0/+8
| | | | | | | | | | | | | | | | | | | | | | Impact: add new (default-off) tracing visualization feature Usage example: mount -t debugfs nodev /sys/kernel/debug cd /sys/kernel/debug/tracing echo userstacktrace >iter_ctrl echo sched_switch >current_tracer echo 1 >tracing_enabled .... run application ... echo 0 >tracing_enabled Then read one of 'trace','latency_trace','trace_pipe'. To get the best output you can compile your userspace programs with frame pointers (at least glibc + the app you are tracing). Signed-off-by: Török Edwin <edwintorok@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* include/linux/stacktrace.h: declare struct task_structAndrew Morton2008-10-031-0/+2
| | | | | | | | | | | | | | | include/linux/stacktrace.h:13: warning: 'struct task_struct' declared inside parameter list (This might be a hard error on sparc64, which uses this header and has -Werror) Reported-by: "Randy.Dunlap" <rdunlap@xenotime.net> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sched: latencytop supportArjan van de Ven2008-01-251-0/+3
| | | | | | | | LatencyTOP kernel infrastructure; it measures latencies in the scheduler and tracks it system wide and per process. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* stacktrace: fix header file for !CONFIG_STACKTRACEJohannes Berg2007-07-191-1/+1
| | | | | | | | | | | | The print_stack_trace macro in stacktrace.h has a wrong number of arguments, fix it. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* simplify the stacktrace codeChristoph Hellwig2007-05-081-4/+2
| | | | | | | | | | | | | | | | | | | Simplify the stacktrace code: - remove the unused task argument to save_stack_trace, it's always current - remove the all_contexts flag, it's alwasy 0 Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Andi Kleen <ak@suse.de> Cc: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] x86: Some preparationary cleanup for stack traceAndi Kleen2006-09-261-3/+4
| | | | | | | | | | | - Remove unused all_contexts parameter No caller used it - Move skip argument into the structure (needed for followon patches) Cc: mingo@elte.hu Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] lockdep: stacktrace subsystem, coreIngo Molnar2006-07-031-0/+20
Framework to generate and save stacktraces quickly, without printing anything to the console. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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