mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 16:38:31 +00:00
07031e14c1
This adds the profile=kvm boot option, which enables KVM to profile VM exits. Use: "readprofile -m ./System.map | sort -n" to see the resulting output: [...] 18246 serial_out 148.3415 18945 native_flush_tlb 378.9000 23618 serial_in 212.7748 29279 __spin_unlock_irq 622.9574 43447 native_apic_write 2068.9048 52702 enable_8259A_irq 742.2817 54250 vgacon_scroll 89.3740 67394 ide_inb 6126.7273 79514 copy_page_range 98.1654 84868 do_wp_page 86.6000 140266 pit_read 783.6089 151436 ide_outb 25239.3333 152668 native_io_delay 21809.7143 174783 mask_and_ack_8259A 783.7803 362404 native_set_pte_at 36240.4000 1688747 total 0.5009 Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
127 lines
2.6 KiB
C
127 lines
2.6 KiB
C
#ifndef _LINUX_PROFILE_H
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#define _LINUX_PROFILE_H
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#ifdef __KERNEL__
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/cpumask.h>
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#include <linux/cache.h>
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#include <asm/errno.h>
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extern int prof_on __read_mostly;
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#define CPU_PROFILING 1
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#define SCHED_PROFILING 2
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#define SLEEP_PROFILING 3
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#define KVM_PROFILING 4
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struct proc_dir_entry;
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struct pt_regs;
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struct notifier_block;
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/* init basic kernel profiler */
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void __init profile_init(void);
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void profile_tick(int);
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/*
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* Add multiple profiler hits to a given address:
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*/
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void profile_hits(int, void *ip, unsigned int nr_hits);
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/*
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* Single profiler hit:
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*/
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static inline void profile_hit(int type, void *ip)
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{
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/*
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* Speedup for the common (no profiling enabled) case:
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*/
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if (unlikely(prof_on == type))
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profile_hits(type, ip, 1);
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}
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#ifdef CONFIG_PROC_FS
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void create_prof_cpu_mask(struct proc_dir_entry *);
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#else
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#define create_prof_cpu_mask(x) do { (void)(x); } while (0)
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#endif
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enum profile_type {
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PROFILE_TASK_EXIT,
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PROFILE_MUNMAP
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};
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#ifdef CONFIG_PROFILING
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struct task_struct;
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struct mm_struct;
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/* task is in do_exit() */
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void profile_task_exit(struct task_struct * task);
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/* task is dead, free task struct ? Returns 1 if
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* the task was taken, 0 if the task should be freed.
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*/
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int profile_handoff_task(struct task_struct * task);
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/* sys_munmap */
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void profile_munmap(unsigned long addr);
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int task_handoff_register(struct notifier_block * n);
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int task_handoff_unregister(struct notifier_block * n);
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int profile_event_register(enum profile_type, struct notifier_block * n);
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int profile_event_unregister(enum profile_type, struct notifier_block * n);
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int register_timer_hook(int (*hook)(struct pt_regs *));
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void unregister_timer_hook(int (*hook)(struct pt_regs *));
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/* Timer based profiling hook */
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extern int (*timer_hook)(struct pt_regs *);
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struct pt_regs;
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#else
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static inline int task_handoff_register(struct notifier_block * n)
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{
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return -ENOSYS;
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}
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static inline int task_handoff_unregister(struct notifier_block * n)
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{
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return -ENOSYS;
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}
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static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
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{
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return -ENOSYS;
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}
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static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
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{
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return -ENOSYS;
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}
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#define profile_task_exit(a) do { } while (0)
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#define profile_handoff_task(a) (0)
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#define profile_munmap(a) do { } while (0)
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static inline int register_timer_hook(int (*hook)(struct pt_regs *))
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{
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return -ENOSYS;
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}
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static inline void unregister_timer_hook(int (*hook)(struct pt_regs *))
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{
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return;
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}
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#endif /* CONFIG_PROFILING */
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#endif /* __KERNEL__ */
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#endif /* _LINUX_PROFILE_H */
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