brk increase/decrease of one page

0
100M
200M
300M
400M
500M
600M
0
16.09
32.18
48.26
64.35
80.44
96.53
0
20
40
60
80
100
120
140
    

Context switch via pipes

0
5M
10M
15M
20M
25M
30M
35M
40M
0
11.23
22.46
33.7
44.93
56.16
67.39
78.63
89.86
0
20
40
60
80
100
120
140
    

eventfd read/write of 8 bytes

0
100M
200M
300M
400M
500M
0
18.03
36.06
54.1
72.13
90.16
0
20
40
60
80
100
120
140
    

futex(FUTEX_WAKE)

0
100M
200M
300M
400M
500M
600M
700M
800M
0
11.66
23.32
34.97
46.63
58.29
69.95
81.6
93.26
0
20
40
60
80
100
120
140
    

futex(FUTEX_WAIT)

0
100M
200M
300M
400M
500M
600M
700M
0
13.94
27.87
41.81
55.75
69.69
83.62
97.56
0
20
40
60
80
100
120
140
    

futex(FUTEX_WAKE_PRIVATE)

0
200M
400M
600M
800M
1B
1.2B
1.4B
1.6B
0
11.84
23.69
35.53
47.38
59.22
71.07
82.91
94.76
0
20
40
60
80
100
120
140
    

futex(FUTEX_WAIT_PRIVATE)

0
200M
400M
600M
800M
1B
1.2B
0
15.58
31.16
46.75
62.33
77.91
93.49
0
20
40
60
80
100
120
140
    

getppid

0
500M
1B
1.5B
2B
2.5B
0
17.16
34.32
51.48
68.64
85.8
0
20
40
60
80
100
120
140
    

Separate file write lock/unlock

    

Separate file lseek

    

Same file lseek

    

malloc/free of 128MB

    

malloc/free of 1kB

    

Anonymous memory mmap/munmap of 128MB

    

Separate file mmap/munmap of 128MB

    

Separate file open/close

    

Separate file open/close in different directories

    

Same file open/close

    

Anonymous memory page fault

    

Separate file private mapping page fault

    

Separate file shared mapping page fault

    

pipe read/write

    

poll of 1 fd

    

poll of 128 fds

    

POSIX semaphores

    

Separate file pread

    

Same file pread

    

Contended pthread mutex

    

Uncontended pthread mutex

    

Separate file pwrite

    

Same file pwrite

    

Separate file read

    

Same file read

    

Separate file O_DIRECT read

    

Same file O_DIRECT read

    

Separate file seek+read

    

sched_yield