Re: High system times on Scaleway Cloud server

[Alexander Nasonov <alnsn%yandex.ru@localhost>]

Alexander Nasonov wrote:
> # tprof monitor -e CPU_CYCLES:k -o tprof.out sleep 30
> # tprof analyze tprof.out
> 
> File: tprof.out
> Number of samples: 74
> 
> percentage   nsamples pid    lwp  cpu  k address          symbol
> ------------ -------- ------ ---- ---- - ---------------- ------
>    2.702703%        2      0    4    0 1 ffffffc0000040a4 splx+0xbc
>    2.702703%        2      0   92    0 1 ffffffc000457908 vfs_vnode_iterator_next1+0x78
>    1.351351%        1  27653    1    0 1 ffffffc0000040a4 splx+0xbc


# tprof monitor -e INST_RETIRED:k -o tprof.out sleep 30

tprof statistics:
        sample 10
        overflow 0
        buf 10
        emptybuf 245
        dropbuf 0
        dropbuf_sample 0
nebula# tprof analyze tprof.out | less
nebula# tprof analyze tprof.out        
File: tprof.out
Number of samples: 10

percentage   nsamples pid    lwp  cpu  k address          symbol
------------ -------- ------ ---- ---- - ---------------- ------
  20.000000%        2      0    4    0 1 ffffffc0000040a4 splx+0xbc
  10.000000%        1   7849    1    0 1 ffffffc0003c7408 mutex_enter+0x108
  10.000000%        1   6516    1    0 1 ffffffc0003c7424 mutex_enter+0x124
  10.000000%        1   4076    1    0 1 ffffffc0003c7a00 mutex_exit+0x80
  10.000000%        1  17461    1    0 1 ffffffc0003e03f0 kobj_renamespace
  10.000000%        1  15012    1    0 1 ffffffc0003e03f0 kobj_renamespace
  10.000000%        1  10323    1    0 1 ffffffc0003e03f0 kobj_renamespace
  10.000000%        1  15305    1    0 1 ffffffc000463c78 fstrans_start+0x8
  10.000000%        1  19003    1    0 1 ffffffc00052405c __sync_val_compare_and_swap_8+0x14

-- 
Alex