# echo 1 > /proc/timer_stats;sleep 10;
# echo 0 > /proc/timer_stats; cat /proc/timer_stats | sort -t ',' -b -k 2 -n | grep test
    6, 25115 test-host        do_nanosleep (hrtimer_wakeup)
 99867, 25115 test-host        hrtimer_start (it_real_fn)
# sudo perf stat -e irq:*,timer:* -p $(pidof test-host) sleep 10
  Warning: unknown op '{'
  Warning: unknown op '{'

 Performance counter stats for process id '25115':

                 0 irq:irq_handler_entry                                       
                 0 irq:irq_handler_exit                                        
                 0 irq:softirq_entry                                           
                 0 irq:softirq_exit                                            
                 0 irq:softirq_raise                                           
                 0 timer:timer_init                                            
                 0 timer:timer_start                                           
                 0 timer:timer_expire_entry                                    
                 0 timer:timer_expire_exit                                     
                 0 timer:timer_cancel                                          
           100,745 timer:hrtimer_init                                          
           201,652 timer:hrtimer_start                                         
                 4 timer:hrtimer_expire_entry                                   
                 4 timer:hrtimer_expire_exit                                   
           101,065 timer:hrtimer_cancel                                        
                 0 timer:itimer_state                                          
                 2 timer:itimer_expire                                         
                 0 timer:tick_stop                                             

      10.000763356 seconds time elapsed

# sudo perf stat -p $(pidof test-host) sleep 10

 Performance counter stats for process id '25115':

        847.348719 task-clock (msec)         #    0.085 CPUs utilized          
            99,981 context-switches          #    0.118 M/sec                  
                 0 cpu-migrations            #    0.000 K/sec                  
                 0 page-faults               #    0.000 K/sec                  
       607,782,792 cycles                    #    0.717 GHz                    
   <not supported> stalled-cycles-frontend 
   <not supported> stalled-cycles-backend  
       700,673,778 instructions              #    1.15  insns per cycle        
       130,516,259 branches                  #  154.029 M/sec                  
           887,230 branch-misses             #    0.68% of all branches        

      10.000683870 seconds time elapsed

# sudo perf record -p $(pidof test-host) -s -T -R sleep 10
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.039 MB perf.data (~1685 samples) ]
# sudo perf report -I -n | grep xxxxxxxxxxa -v
# ========
# captured on: Mon Aug 29 23:09:44 2016
# hostname : test-Vostro-5470
# os release : 3.13.0-45-generic
# perf version : 3.13.11-ckt13
# arch : x86_64
# nrcpus online : 4
# nrcpus avail : 4
# cpudesc : Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz
# cpuid : GenuineIntel,6,69,1
# total memory : 3953448 kB
# cmdline : /usr/lib/linux-tools-3.13.0-45/perf record -p 25115 -s -T -R sleep 10 
# event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, attr_mmap2 = 0, attr_mmap  = 1, attr_mmap_data = 0
# sibling cores   : 0-3
# sibling threads : 0-1
# sibling threads : 2-3
# node0 meminfo  : total = 3953448 kB, free = 182324 kB
# node0 cpu list : 0-3
# pmu mappings: cpu = 4, software = 1, tracepoint = 2, breakpoint = 5
# ========
#
# Samples: 442  of event 'cycles'
# Event count (approx.): 534240571
#
# Overhead       Samples    Command      Shared Object                              Symbol
# ........  ............  .........  .................  ..................................
#
    11.78%            68  test-host  [kernel.kallsyms]  [k] native_write_msr_safe         
     5.29%            22  test-host  test-host          [.] timer_handler                 
     5.29%            22  test-host  libc-2.19.so       [.] __GI___libc_nanosleep         
     3.85%            16  test-host  [kernel.kallsyms]  [k] do_signal                     
     3.60%            15  test-host  [kernel.kallsyms]  [k] update_cfs_shares             
     2.88%            12  test-host  [kernel.kallsyms]  [k] dequeue_entity                
     2.40%            10  test-host  [kernel.kallsyms]  [k] __restore_xstate_sig          
     2.40%            10  test-host  [kernel.kallsyms]  [k] hrtimer_nanosleep             
     2.40%            10  test-host  [kernel.kallsyms]  [k] kmem_cache_free               
     2.16%             9  test-host  [kernel.kallsyms]  [k] hrtimer_init                  
     2.16%             9  test-host  [kernel.kallsyms]  [k] do_nanosleep                  
     1.92%             8  test-host  [kernel.kallsyms]  [k] save_xstate_sig               
     1.70%             7  test-host  [kernel.kallsyms]  [k] system_call_after_swapgs      
     1.68%             7  test-host  [kernel.kallsyms]  [k] recalc_sigpending             
     1.68%             7  test-host  [kernel.kallsyms]  [k] __hrtimer_start_range_ns      
     1.68%             7  test-host  [kernel.kallsyms]  [k] __calc_delta                  
     1.68%             7  test-host  [kernel.kallsyms]  [k] update_curr                   
     1.68%             7  test-host  [kernel.kallsyms]  [k] dequeue_task_fair             
     1.68%             7  test-host  [kernel.kallsyms]  [k] ktime_get                     
     1.44%             6  test-host  [kernel.kallsyms]  [k] timerqueue_add                
     1.44%             6  test-host  [kernel.kallsyms]  [k] _raw_spin_lock                
     1.44%             6  test-host  [kernel.kallsyms]  [k] _raw_spin_lock_irq            
     1.20%             5  test-host  libc-2.19.so       [.] usleep                        
     1.20%             5  test-host  [kernel.kallsyms]  [k] setup_sigcontext              
     1.20%             5  test-host  [kernel.kallsyms]  [k] native_read_tsc               
     1.20%             5  test-host  [kernel.kallsyms]  [k] do_sigaltstack                
     1.20%             5  test-host  [kernel.kallsyms]  [k] update_min_vruntime           
     1.20%             5  test-host  [kernel.kallsyms]  [k] cpuacct_charge                
     1.20%             5  test-host  [kernel.kallsyms]  [k] ctx_sched_out                 
     1.20%             5  test-host  [kernel.kallsyms]  [k] copy_user_enhanced_fast_string
     1.20%             5  test-host  [kernel.kallsyms]  [k] _raw_spin_unlock_irqrestore   
     1.20%             5  test-host  [kernel.kallsyms]  [k] int_check_syscall_exit_work   
     1.20%             5  test-host  [kernel.kallsyms]  [k] __schedule                    
     0.96%             7  test-host  [kernel.kallsyms]  [k] perf_event_context_sched_in   
     0.96%             4  test-host  [kernel.kallsyms]  [k] get_signal_to_deliver         
     0.96%             4  test-host  [kernel.kallsyms]  [k] sched_clock_cpu               
     0.96%             4  test-host  [kernel.kallsyms]  [k] finish_task_switch            
     0.96%             4  test-host  [kernel.kallsyms]  [k] system_call                   
     0.72%             4  test-host  [kernel.kallsyms]  [k] perf_pmu_rotate_start.isra.39 
     0.72%             3  test-host  [kernel.kallsyms]  [k] hrtimer_try_to_cancel         
     0.72%             3  test-host  [kernel.kallsyms]  [k] sys_nanosleep                 
     0.72%             3  test-host  [kernel.kallsyms]  [k] account_entity_dequeue        
     0.72%             3  test-host  [kernel.kallsyms]  [k] put_prev_task_fair            
     0.72%             3  test-host  [kernel.kallsyms]  [k] perf_event_sched_in           
     0.72%             3  test-host  [kernel.kallsyms]  [k] _raw_spin_lock_irqsave        
     0.72%             3  test-host  [kernel.kallsyms]  [k] stub_rt_sigreturn             
     0.48%             2  test-host  test-host          [.] main                          
     0.48%             2  test-host  libc-2.19.so       [.] __restore_rt                  
     0.48%             2  test-host  [kernel.kallsyms]  [k] sys_rt_sigreturn              
     0.48%             2  test-host  [kernel.kallsyms]  [k] read_tsc                      
     0.48%             2  test-host  [kernel.kallsyms]  [k] native_sched_clock            
     0.48%             2  test-host  [kernel.kallsyms]  [k] free_uid                      
     0.48%             2  test-host  [kernel.kallsyms]  [k] __sigqueue_free.part.11       
     0.48%             2  test-host  [kernel.kallsyms]  [k] restore_altstack              
     0.48%             2  test-host  [kernel.kallsyms]  [k] pick_next_task_fair           
     0.48%             2  test-host  [kernel.kallsyms]  [k] perf_pmu_disable              
     0.48%             2  test-host  [kernel.kallsyms]  [k] __perf_event_task_sched_in    
     0.48%             2  test-host  [kernel.kallsyms]  [k] __perf_event_task_sched_out   
     0.48%             2  test-host  [kernel.kallsyms]  [k] schedule                      
     0.48%             2  test-host  [kernel.kallsyms]  [k] system_call_fastpath          
     0.48%             2  test-host  [kernel.kallsyms]  [k] sysret_signal                 
     0.48%             2  test-host  [kernel.kallsyms]  [k] __set_current_blocked         
     0.48%             2  test-host  [kernel.kallsyms]  [k] __remove_hrtimer              
     0.48%             2  test-host  [kernel.kallsyms]  [k] clockevents_program_event     
     0.25%             2  test-host  [kernel.kallsyms]  [k] _atomic_dec_and_lock          
     0.24%             1  test-host  [kernel.kallsyms]  [k] restore_sigcontext            
     0.24%             1  test-host  [kernel.kallsyms]  [k] do_notify_resume              
     0.24%             1  test-host  [kernel.kallsyms]  [k] x86_pmu_disable               
     0.24%             1  test-host  [kernel.kallsyms]  [k] intel_pmu_disable_all         
     0.24%             1  test-host  [kernel.kallsyms]  [k] __dequeue_signal              
     0.24%             1  test-host  [kernel.kallsyms]  [k] dequeue_signal                
     0.24%             1  test-host  [kernel.kallsyms]  [k] __set_task_blocked            
     0.24%             1  test-host  [kernel.kallsyms]  [k] enqueue_hrtimer               
     0.24%             1  test-host  [kernel.kallsyms]  [k] idle_cpu                      
     0.24%             1  test-host  [kernel.kallsyms]  [k] local_clock                   
     0.24%             1  test-host  [kernel.kallsyms]  [k] pick_next_task_idle           
     0.24%             1  test-host  [kernel.kallsyms]  [k] update_cfs_rq_blocked_load    
     0.24%             1  test-host  [kernel.kallsyms]  [k] clear_buddies                 
     0.24%             1  test-host  [kernel.kallsyms]  [k] pick_next_task_rt             
     0.24%             1  test-host  [kernel.kallsyms]  [k] pick_next_task_stop           
     0.24%             1  test-host  [kernel.kallsyms]  [k] perf_pmu_enable               
     0.24%             1  test-host  [kernel.kallsyms]  [k] rb_insert_color               
     0.24%             1  test-host  [kernel.kallsyms]  [k] __clear_user                  
     0.24%             1  test-host  [kernel.kallsyms]  [k] retint_swapgs                 
     0.24%             1  test-host  [kernel.kallsyms]  [k] sysret_check                  
     0.24%             1  test-host  [kernel.kallsyms]  [k] hrtimer_start_range_ns        
     0.00%             1  test-host  [kernel.kallsyms]  [k] _raw_spin_unlock              
     0.00%             1  test-host  [kernel.kallsyms]  [k] x86_pmu_enable                


#
# (For a higher level overview, try: perf report --sort comm,dso)
#