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perf/x86-64: Use frame pointer to walk on irq and process stacks

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We were using the frame pointer based stack walker on every
contexts in x86-32, but not in x86-64 where we only use the
seven-league boots on the exception stacks.

Use it also on irq and process stacks. This utterly accelerate
the captures.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Frederic Weisbecker
2010-03-03 07:38:37 +01:00
parent db2c4c7791
commit 61e67fb9d3
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kernel/dumpstack_64.c
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@ -208,7 +208,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
if (in_irq_stack(stack, irq_stack, irq_stack_end)) { if (in_irq_stack(stack, irq_stack, irq_stack_end)) {
if (ops->stack(data, "IRQ") < 0) if (ops->stack(data, "IRQ") < 0)
break; break;
bp = print_context_stack(tinfo, stack, bp, bp = ops->walk_stack(tinfo, stack, bp,
ops, data, irq_stack_end, &graph); ops, data, irq_stack_end, &graph);
/* /*
* We link to the next stack (which would be * We link to the next stack (which would be
@ -229,7 +229,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
/* /*
* This handles the process stack: * This handles the process stack:
*/ */
bp = print_context_stack(tinfo, stack, bp, ops, data, NULL, &graph); bp = ops->walk_stack(tinfo, stack, bp, ops, data, NULL, &graph);
put_cpu(); put_cpu();
} }
EXPORT_SYMBOL(dump_trace); EXPORT_SYMBOL(dump_trace);