stress 🔥
Collection of tools to stress a machine (cpu, mem, pid, disk).
TOC
cpu
Runs load on n processes:
Example
docker run cirocosta/stress cpu -n 3
[2] - child started
[1] - child started
[0] - child started
[1] Waiting for SIGINT
docker stats
CONTAINER CPU % MEM USAGE / LIMIT PIDS
b391ce600bb4 300.83% 604KiB / 8.759GiB 4
mem
Tries to allocate up to n MB of memory (with actual initialization of the memory).
Arguments:
nMB of memory to allocate
Example
docker run cirocosta/stress mem -n 1024
1024 MB will be allocated
Allocated: 1024
Done.[1] Waiting for SIGINT
docker stats --no-stream
CONTAINER CPU % MEM USAGE / LIMIT MEM % PIDS
40080ad19a1b 0.00% 1.002GiB / 8.759GiB 11.45% 1
docker exec 40080ad19a1b pmap -x 1
1: mem -n 1024
Address Kbytes PSS Dirty Swap Mode Mapping
000055c423976000 24 24 0 0 r-xp /usr/local/bin/mem
000055c423b7b000 8 8 8 0 rw-p /usr/local/bin/mem
000055c4251e2000 1048576 1048576 1048576 0 rw-p [heap]
00007fffaa5c8000 132 8 8 0 rw-p [stack]
00007fffaa5eb000 8 0 0 0 r--p [vvar]
00007fffaa5ed000 8 0 0 0 r-xp [vdso]
ffffffffff600000 4 0 0 0 r-xp [vsyscall]
---------------- ------ ------ ------ ------
total 1048760 1048616 1048592 0
pid
Allocates N processes and then suspends the execution.
Arguments:
-nnumber of PIDS
Example
docker run cirocosta/stress pid -n 200
Starting to spawn 200 blocking children
[1] Waiting for SIGINT
CONTAINER CPU % PIDS
38a9e2d1bae0 0.00% 200
disk
Tries to write n MBs of data to a file (disk-out.txt).
Arguments:
-nnumber of MBs to write to the file-fname of the file-bblock after writing (optional)
Example
docker run --rm cirocosta/stress disk -n 1024 -f ./disk-out.txt
-rw-r--r-- 1 root root 1.0G Jun 24 17:50 disk-out.txt
files
Creates n number of files under ./stress-files.
Arguments:
-nnumber of files to create
Example
docker run --rm cirocosta/stress files -n 100
ls ./stress-files
file1 file12 file16 file2 file23 file27 file30 file34 file38 file41 file45 file49 file52 file56 file6 file63 file67 file70 file74 file78 file81 file85 file89 file92 file96
file10 file13 file17 file20 file24 file28 file31 file35 file39 file42 file46 file5 file53 file57 file60 file64 file68 file71 file75 file79 file82 file86 file9 file93 file97
file100 file14 file18 file21 file25 file29 file32 file36 file4 file43 file47 file50 file54 file58 file61 file65 file69 file72 file76 file8 file83 file87 file90 file94 file98
file11 file15 file19 file22 file26 file3 file33 file37 file40 file44 file48 file51 file55 file59 file62 file66 file7 file73 file77 file80 file84 file88 file91 file95 file99
context-switches
Creates 50 threads which rotate between n CPUs executing, in a ring-buffer manner, cpu sticking and execution of dumb while loops.
Arguments:
- none
Example
docker run --rm cirocosta/stress context-switches
This leads to:
write
Creates 2 threads which are responsible for write & lseek forever in two files by writing n MBs to each file.
Arguments:
n- size of the files (MB)d- base directory to write files to
Example
docker run --rm cirocosta/stress write -n 1
CONTAINER CPU % ... BLOCK I/O PIDS
d809a7dee8c6 5.22% ... 0B / 3.78GB 1
tcp
Separated in two binaries (tcp-server and tcp-client) it simply starts a TCP echo server in one side and in the order contiguously sends and reads chunks of 4KB.
Arguments:
-fip where the server lives (client only)-nport (client and server)
Example
docker run --rm --network host cirocosta/stress tcp-client -f 127.0.0.1 -n 1337
docker run --rm --network host cirocosta/stress tcp-server -n 1337
# after some seconds:
CONTAINER .. NET I/O BLOCK I/O PIDS
fd1df18bd1e9 .. 3.25GB / 3.25GB 0B / 0B 2
LICENSE
MIT