stress-ng will stress test a computer system in various selectable
ways. It was designed to exercise various physical subsystems of a computer as well as the various operating system kernel interfaces.
Stress-ng features:
stress-ng will stress test a computer system in various selectable
ways. It was designed to exercise various physical subsystems of a computer as well as the various operating system kernel interfaces.
Stress-ng features:
stress-ng was originally intended to make a machine work hard and trip hardware issues such as thermal overruns as well as operating system bugs that only occur when a system is being thrashed hard. Use stress-ng with caution as some of the tests can make a system run hot on poorly designed hardware and also can cause excessive system thrashing which may be difficult to stop.
stress-ng can also measure test throughput rates; this can be useful to observe performance changes across different operating system releases or types of hardware. However, it has never been intended to be used as a precise benchmark test suite, so do NOT use it in this manner.
Running stress-ng with root privileges will adjust out of memory settings on Linux systems to make the stressors unkillable in low memory situations, so use this judiciously. With the apropriate privilege, stress-ng can allow the ionice class and ionice levels to be adjusted, again, this should be used with care.
One can specify the number of processes to invoke per type of stress test; specifying a negative or zero value will select the number of online processors as defined by sysconf(_SC_NPROCESSORS_ONLN).
stress-ng has found several Linux Kernel bugs and appropriate fixes have been landed to address these issues:
At build-time stress-ng will detect kernel features that are available on the target build system and enable stress tests appropriately. Stress-ng has been build-tested on Ubuntu, Debian, Debian GNU/Hurd, kFreeBSD, OpenBSD, NetBSD, FreeBSD, Debian kFreeBSD, Minix and OpenIndiana. Ports to other POSIX/UNIX like operating systems should be relatively easy.
The following specific stress tests are available:
af-alg affinity aio aiol apparmor atomic bigheap bind-mount brk bsearch cache cap chdir chmod chown chroot clock clone context copy-file cpu cpu-online crypt daemon dccp dentry dev dir dirdeep dnotify dup epoll eventfd exec fallocate fanotify fault fcntl fiemap fifo filename flock fork fp-error fstat full futex get getdent getrandom handle hdd heapsort hsearch icache icmp-flood inotify io iomix ioprio itimer kcmp key kill klog lease link locka lockbus lockf lockofd longjmp lsearch madvise malloc matrix membarrier memcpy memfd memthrash mergesort mincore mknod mlock mmap mmapfork mmapmany mq mremap msg msync netdev netlink-proc nice nop null numa oom-pipe opcode open personality pipe poll procfs pthread ptrace pty qsort quota rdrand readahead remap rename resources rlimit rmap rt-sched rtc schedpolicy sctp seal seccomp seek sem sem-sysv sendfile shm shm-sysv sigfd sigfpe sigpending sigq sigsegv sigsuspend sleep sock sockfd sockpair softlockup spawn splice stack stackmmap str stream switch symlink sync-file sysfs sysinfo tee timer timerfd tlb-shootdown tmpfs tsc tsearch udp udp-flood unshare urandom userfaultfd utime vecmath vfork vforkmany vm vm-rw vm-splice wait wcs xattr yield zero zlib zombie
For more details of each stress test, please consult the stress-ng manual.
Stress tests are also grouped as "classes", these exercise specific aspects of the operating system. The following classes are available: cpu cpu-cache device io interrupt filesystem memory network os pipe scheduler security vm
For example, to run 2 instances of each of the memory specific stressors use:stress-ng --class memory 2
| ackermann |
Ackermann function: compute A(3, 10), where:
A(m, n) = n + 1 if m = 0; A(m - 1, 1) if m > 0 and n = 0; A(m - 1, A(m, n - 1)) if m > 0 and n > 0 |
| bitops | various bit operations from bithack, namely: reverse bits, parity check, bit count, round to nearest power of 2 |
| callfunc | recursively call 8 argument C function to a depth of 1024 calls and unwind |
| cdouble | 1000 iterations of a mix of double floating point complex operations |
| cfloat | 1000 iterations of a mix of floating point complex operations |
| clongdouble | 1000 iterations of a mix of long double floating point complex operations |
| correlate | perform a 16384 * 1024 correlation of random doubles |
| crc16 | compute 1024 rounds of CCITT CRC16 on random data |
| decimal32 | 1000 iterations of a mix of 32 bit decimal floating point operations (GCC only) |
| decimal64 | 1000 iterations of a mix of 64 bit decimal floating point operations (GCC only) |
| decimal128 | 1000 iterations of a mix of 128 bit decimal floating point operations (GCC only) |
| dither | Floyd–Steinberg dithering of a 1024 × 768 random image from 8 bits down to 1 bit of depth |
| djb2a | 128 rounds of hash DJB2a (Dan Bernstein hash using the xor variant) on 128 to 1 bytes of random strings |
| double | 1000 iterations of a mix of double precision floating point operations |
| euler | compute e using n = (1 + (1 / n))n |
| explog | iterate on n = exp(log(n) / 1.00002) |
| fibonacci | compute Fibonacci sequence of 0, 1, 1, 2, 5, 8... |
| fft | 4096 sample Fast Fourier Transform |
| float | 1000 iterations of a mix of floating point operations |
| fnv1a | 128 rounds of hash FNV-1a (Fowler-Noll-Vo hash using the xor then multiply variant) on 128 to 1 bytes of random strings |
| gamma | calculate the Euler-Mascheroni constant γ using the limiting difference between the harmonic series (1 + 1/2 + 1/3 + 1/4 + 1/5 ... + 1/n) and the natural logarithm ln(n), for n = 80000. |
| gcd | compute GCD of integers |
| gray | calculate binary to gray code and gray code back to binary for integers from 0 to 65535 |
| hamming | compute Hamming H(8,4) codes on 262144 lots of 4 bit data. This turns 4 bit data into 8 bit Hamming code containing 4 parity bits. For data bits d1..d4, parity bits are computed as: p1 = d2 + d3 + d4 p2 = d1 + d3 + d4 p3 = d1 + d2 + d4 p4 = d1 + d2 + d3 |
| hanoi | solve a 21 disc Towers of Hanoi stack using the recursive solution |
| hyperbolic | compute sinh(θ) * cosh(θ) + sinh(2θ) + cosh(3θ) for float, double and long double hyperbolic sine and cosine functions where θ = 0 to 2 * π in 1500 steps |
| idct | 8 * 8 IDCT (Inverse Discrete Cosine Transform) |
| int8 | mix of 8 bit integer operations |
| int16 | mix of 16 bit integer operations |
| int32 | mix of 32 bit integer operations |
| int64 | mix of 64 bit integer operations |
| int128 | mix of 128 bit integer operations |
| int32float | mix of 32 bit integer and floating point operations |
| int32double | mix of 32 bit integer and double precision floating point operations |
| int32longdouble | mix of 32 bit integer and long double pointing operations |
| int64float | mix of 64 bit integer and floating point operations |
| int64double | mix of 64 bit integer and double precision floating point operations |
| int64longdouble | mix of 64 bit integer and long double pointing operations |
| int128float | mix of 128 bit integer and floating point operations |
| int128double | mix of 128 bit integer and double precision floating point operations |
| int128longdouble | mix of 128 bit integer and long double pointing operations |
| int128idecimal32 | mix of 128 bit integer and 32 bit decimal pointing operations |
| int128idecimal64 | mix of 128 bit integer and 64 bit decimal pointing operations |
| int128idecimal128 | mix of 128 bit integer and 128 bit decimal pointing operations |
| jenkin | Jenkin's integer hash on 128 rounds of 128..1 bytes of random data |
| jmp | Simple unoptimised compare <, >, == and jmp branching |
| ln2 | compute ln(2) based on series: 1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6 ... |
| longdouble | 1000 iterations of a mix of long double precision floating point operations |
| loop | simple empty loop |
| maxtrixprod | matrix product of two 128 * 128 matrices of double floats. Testing on 64 bit x86 hardware shows that this is provides a good mix of memory, cache and floating point operations and is probably the best CPU method to use to make a CPU run hot. |
| nsqrt | sqrt() using Newton-Raphson |
| omega | compute the omega constant defined by ΩeΩ = 1 using efficient iteration of Ωn+1 = (1 + Ωn) / (1 + eΩn) |
| parity | compute parity using various methods from the Standford Bit Twiddling Hacks. Methods employed are: the naïve way, the naïve way with the Brian Kernigan bit counting optimisation, the multiply way, the parallel way, and the lookup table ways (2 variations) |
| phi | compute the Golden Ratio φ using series |
| pi | compute π using the Srinivasa Ramanujan fast convergence algorithm |
| pjw | 128 rounds of hash pjw function on 128 to 1 bytes of random strings |
| prime | find all the primes in the range 1..1000000 using a slightly optimised brute force naive trial division search |
| psi | compute ψ (the reciprocal Fibonacci constant) using the sum of the reciprocals of the Fibonacci numbers |
| queens | compute all the solutions of the classic 8 queens problem for board sizes 1..12 |
| rand | 16384 iterations of rand(), where rand is the MWC pseudo random number generator. The MWC random function concatenates two 16 bit multiply-with-carry generators:
x(n) = 36969 * x(n - 1) + carry, y(n) = 18000 * y(n - 1) + carry mod 216 |
| rgb | convert RGB to YUV and back to RGB (CCIR 601) |
| sdbm | 128 rounds of hash sdbm (as used in the SDBM database and GNU awk) on 128 to 1 bytes of random strings |
| trig | compute sin(θ) * cos(θ) + sin(2θ) + cos(3θ) for float, double and long double sine and cosine functions where θ = 0 to 2 * π in 1500 steps |
| zeta | compute the Riemann Zeta function ζ(s) for s = 2.0..10.0 |
| all | iterate over all the vm stress methods as listed below |
| flip | sequentially work through memory 8 times, each time just one bit in memory flipped (inverted). This will effectively invert each byte in 8 passes. |
| galpat-0 | galloping pattern zeros. This sets all bits to 0 and flips just 1 in 4096 bits to 1. It then checks to see if the 1s are pulled down to 0 by their neighbours or of the neighbours have been pulled up to 1. |
| galpat-1 | galloping pattern ones. This sets all bits to 1 and flips just 1 in 4096 bits to 0. It then checks to see if the 0s are pulled up to 1 by their neighbours or of the neighbours have been pulled down to 0. |
| gray | fill the memory with sequential gray codes (these only change 1 bit at a time between adjacent bytes) and then check if they are set correctly. |
| incdec | work sequentially through memory twice, the first pass increments each byte by a specific value and the second pass decrements each byte back to the original start value. The increment/decrement value changes on each invocation of the stressor. |
| inc-nybble | initialise memory to a set value (that changes on each invocation of the stressor) and then sequentially work through each byte incrementing the bottom 4 bits by 1 and the top 4 bits by 15. |
| rand-set | sequentially work through memory in 64 bit chunks setting bytes in the chunk to the same 8 bit random value. The random value changes on each chunk. Check that the values have not changed. |
| rand-sum | sequentially set all memory to random values and then summate the number of bits that have changed from the original set values. |
| ror | fill memory with a random pattern and then sequentially rotate 64 bits of memory right by one bit, then check the final load/rotate/stored values. |
| swap | fill memory in 64 byte chunks with random patters. Then swap each 64 chunk with a randomly chosen chunk. Finally, reverse the swap to put the chunks back to their original place and check if the data is correct. This exercises adjacent and random memory load/stores. |
| move-inv | sequentially fill memory 64 bits of memory at a time with random values, and then check if the memory is set correctly. Next, sequentially invert each 64 bit pattern and again check if the memory is set as expected. |
| modulo-x | fill memory with 23 iterations. Each iteration starts one byte further along from the start of the memory and steps along in 23 byte strides. In each stride, the first byte is set to a random pattern and all other bytes are set to the inverse. Then it checks see if the first byte contains the expected random pattern. This exercises cache store/reads as well as seeing if neighbouring cells influence each other. |
| prime-0 | iterate 8 times by stepping through memory in very large prime strides clearing just on bit at a time in every byte. Then check to see if all bits are set to zero. |
| prime-1 | iterate 8 times by stepping through memory in very large prime strides setting just on bit at a time in every byte. Then check to see if all bits are set to one. |
| prime-gray-0 | first step through memory in very large prime strides clearing just on bit (based on a gray code) in every byte. Next, repeat this but clear the other 7 bits. Then check to see if all bits are set to zero. |
| prime-gray-1 | first step through memory in very large prime strides setting just on bit (based on a gray code) in every byte. Next, repeat this but set the other 7 bits. Then check to see if all bits are set to one. |
| walk-0d | for each byte in memory, walk through each data line setting them to low (and the others are set high) and check that the written value is as expected. This checks if any data lines are stuck. |
| walk-1d | for each byte in memory, walk through each data line setting them to high (and the others are set low) and check that the written value is as expected. This checks if any data lines are stuck. |
| walk-0a | in the given memory mapping, work through a range of specially chosen addresses working through address lines to see if any address lines are stuck low. This works best with physical memory addressing, however, exercising these virtual addresses has some value too. |
| walk-1a | in the given memory mapping, work through a range of specially chosen addresses working through address lines to see if any address lines are stuck high. This works best with physical memory addressing, however, exercising these virtual addresses has some value too. |
| zero-one | set all memory bits to zero and then check if any bits are not zero. Next, set all the memory bits to one and check if any bits are not one. |
| add | Addition of 2 N x N matrices |
| div | Divide an N x N matrix by a scalar |
| frobenius | Frobenius product of 2 N x N matrices |
| hadamard | Hadamard product of 2 N x N matrices |
| mult | Multiply an N x N matrix by a scalar |
| prod | Matrix product of 2 N x N matrices |
| sub | Subtract an N x N matrix from another N x N matrix |
| trans | Transpose an N x N matrix |
stress-ng --cpu 4 --vm 2 --hdd 1 --fork 8 --switch 4 --timeout 5m --metrics-brief stress-ng: info: [31135] dispatching hogs: 4 cpu, 8 fork, 1 hdd, 4 switch, 2 vm stress-ng: info: [31135] successful run completed in 300.31s stress-ng: info: [31135] stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s stress-ng: info: [31135] (secs) (secs) (secs) (real time) (usr+sys time) stress-ng: info: [31135] cpu 33480 300.10 317.07 2.50 111.56 104.77 stress-ng: info: [31135] fork 173399 300.00 2.87 45.28 578.00 3601.23 stress-ng: info: [31135] hdd 868352 300.31 0.16 68.36 2891.56 12672.97 stress-ng: info: [31135] switch 368616604 300.00 43.35 477.37 1228706.01 707897.92 stress-ng: info: [31135] vm 860 300.06 11.76 136.11 2.87 5.82
stress-ng --vm 32 --vm-bytes 64M --vm-stride 1K --vm-populate --page-in --metrics-brief --times --timeout 60s stress-ng: info: [15057] dispatching hogs: 32 vm stress-ng: info: [15057] successful run completed in 60.07s stress-ng: info: [15057] stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s stress-ng: info: [15057] (secs) (secs) (secs) (real time) (usr+sys time) stress-ng: info: [15057] vm 5640 60.01 24.93 180.26 93.98 27.49 stress-ng: info: [15057] for a 60.07s run time: stress-ng: info: [15057] 240.29s available CPU time stress-ng: info: [15057] 25.08s user time ( 10.44%) stress-ng: info: [15057] 180.46s system time ( 75.10%) stress-ng: info: [15057] 205.54s total time ( 85.54%)
sudo stress-ng --all 1 --page-in --ionice-class realtime --ionice-level 0 --sched batch --sched-prio 0 --metrics -t 60 --times stress-ng: info: [18823] dispatching hogs: 1 af-alg, 1 affinity, 1 aio, 1 aiol, 1 apparmor, 1 atomic, 1 bigheap, 1 branch, 1 brk, 1 bsearch, 1 cache, 1 cap, 1 chdir, 1 chmod, 1 chown, 1 chroot, 1 clock, 1 clone, 1 context, 1 copy-file, 1 cpu, 1 crypt, 1 cyclic, 1 daemon, 1 dccp, 1 dentry, 1 dev, 1 dir, 1 dirdeep, 1 dnotify, 1 dup, 1 epoll, 1 eventfd, 1 exec, 1 fallocate, 1 fanotify, 1 fault, 1 fcntl, 1 fiemap, 1 fifo, 1 filename, 1 flock, 1 fork, 1 fp-error, 1 fstat, 1 full, 1 futex, 1 get, 1 getdent, 1 getrandom, 1 handle, 1 hdd, 1 heapsort, 1 hsearch, 1 icache, 1 icmp-flood, 1 inode-flags, 1 inotify, 1 io, 1 iomix, 1 ioprio, 1 itimer, 1 kcmp, 1 key, 1 kill, 1 klog, 1 lease, 1 link, 1 locka, 1 lockbus, 1 lockf, 1 lockofd, 1 longjmp, 1 lsearch, 1 madvise, 1 malloc, 1 matrix, 1 membarrier, 1 memcpy, 1 memfd, 1 memrate, 1 memthrash, 1 mergesort, 1 mincore, 1 mknod, 1 mlock, 1 mmap, 1 mmapfork, 1 mmapmany, 1 mq, 1 mremap, 1 msg, 1 msync, 1 netdev, 1 netlink-proc, 1 nice, 1 nop, 1 null, 1 numa, 1 opcode, 1 open, 1 personality, 1 pipe, 1 poll, 1 procfs, 1 pthread, 1 ptrace, 1 pty, 1 qsort, 1 quota, 1 radixsort, 1 rdrand, 1 readahead, 1 remap, 1 rename, 1 resources, 1 rlimit, 1 rmap, 1 rtc, 1 schedpolicy, 1 sctp, 1 seal, 1 seccomp, 1 seek, 1 sem, 1 sem-sysv, 1 sendfile, 1 shm, 1 shm-sysv, 1 sigfd, 1 sigfpe, 1 sigpending, 1 sigq, 1 sigsegv, 1 sigsuspend, 1 sleep, 1 sock, 1 sockdiag, 1 sockfd, 1 sockpair, 1 softlockup, 1 spawn, 1 splice, 1 stack, 1 stackmmap, 1 str, 1 stream, 1 swap, 1 switch, 1 symlink, 1 sync-file, 1 sysfs, 1 sysinfo, 1 tee, 1 timer, 1 timerfd, 1 tlb-shootdown, 1 tmpfs, 1 tsc, 1 tsearch, 1 udp, 1 udp-flood, 1 unshare, 1 urandom, 1 userfaultfd, 1 utime, 1 vecmath, 1 vfork, 1 vforkmany, 1 vm, 1 vm-rw, 1 vm-splice, 1 wait, 1 wcs, 1 xattr, 1 yield, 1 zero, 1 zlib, 1 zombie stress-ng: info: [18823] successful run completed in 150.64s (2 mins, 30.64 secs) stress-ng: info: [18823] stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s stress-ng: info: [18823] (secs) (secs) (secs) (real time) (usr+sys time) stress-ng: info: [18823] af-alg 16066 60.46 0.03 1.10 265.71 14217.70 stress-ng: info: [18823] affinity 208 60.08 0.00 0.00 3.46 0.00 stress-ng: info: [18823] aio 3381 60.04 0.00 0.12 56.32 28175.00 stress-ng: info: [18823] aiol 0 0.57 0.00 0.00 0.00 0.00 stress-ng: info: [18823] apparmor 21760 60.17 0.13 4.68 361.67 4523.91 stress-ng: info: [18823] atomic 1128681 60.12 1.56 0.00 18773.04 723513.46 stress-ng: info: [18823] bigheap 1862 60.43 0.98 0.17 30.81 1619.13 stress-ng: info: [18823] branch 93939070 60.05 1.62 0.00 1564235.15 57987080.25 stress-ng: info: [18823] brk 775434 61.74 0.10 2.26 12559.50 328573.73 stress-ng: info: [18823] bsearch 479 60.02 1.16 0.00 7.98 412.93 stress-ng: info: [18823] cache 9 60.08 1.31 0.00 0.15 6.87 stress-ng: info: [18823] cap 778314 60.01 0.24 1.34 12970.71 492603.80 stress-ng: info: [18823] chdir 38 76.48 0.04 1.49 0.50 24.84 stress-ng: info: [18823] chmod 710 69.38 0.00 0.54 10.23 1314.81 stress-ng: info: [18823] chown 21320 60.31 0.03 0.87 353.51 23688.89 stress-ng: info: [18823] chroot 4732 60.01 0.00 0.64 78.86 7393.75 stress-ng: info: [18823] clock 635 60.05 0.18 1.51 10.58 375.74 stress-ng: info: [18823] clone 147 150.62 0.00 0.06 0.98 2450.00 stress-ng: info: [18823] context 7569 60.04 0.76 0.76 126.07 4979.61 stress-ng: info: [18823] copy-file 40 62.85 0.00 0.53 0.64 75.47 stress-ng: info: [18823] cpu 223 60.07 1.23 0.03 3.71 176.98 stress-ng: info: [18823] crypt 172 60.09 1.76 0.01 2.86 97.18 stress-ng: info: [18823] cyclic 444896 60.04 0.94 2.32 7410.58 136471.17 stress-ng: info: [18823] daemon 2425 60.00 0.00 0.00 40.42 0.00 stress-ng: info: [18823] dccp 1 1.29 0.00 0.00 0.78 0.00 stress-ng: info: [18823] dentry 4096 74.05 0.02 0.89 55.32 4501.10 stress-ng: info: [18823] dev 1 73.28 0.00 13.96 0.01 0.07 stress-ng: info: [18823] dir 8192 69.72 0.08 3.40 117.49 2354.02 stress-ng: info: [18823] dirdeep 3115 75.09 0.04 3.16 41.48 973.44 stress-ng: info: [18823] dnotify 192 69.35 0.00 0.40 2.77 480.00 stress-ng: info: [18823] dup 2031585 60.06 0.31 0.88 33828.23 1707214.29 stress-ng: info: [18823] epoll 2610 60.85 0.01 0.10 42.89 23727.27 stress-ng: info: [18823] eventfd 1073765 60.01 0.28 3.02 17893.07 325383.33 stress-ng: info: [18823] exec 0 0.00 0.00 0.00 0.00 0.00 stress-ng: info: [18823] fallocate 0 78.44 0.00 2.08 0.00 0.00 stress-ng: info: [18823] fanotify 68034 92.95 0.08 18.20 731.95 3721.77 stress-ng: info: [18823] fault 2583 60.94 0.00 0.42 42.39 6150.00 stress-ng: info: [18823] fcntl 45412 60.34 0.04 0.74 752.59 58220.51 stress-ng: info: [18823] fiemap 0 62.84 0.00 0.53 0.00 0.00 stress-ng: info: [18823] fifo 1862410 60.31 0.24 2.67 30883.17 640003.44 stress-ng: info: [18823] filename 300 62.88 0.01 0.48 4.77 612.24 stress-ng: info: [18823] flock 968547 60.00 0.21 1.10 16142.00 739348.85 stress-ng: info: [18823] fork 4945 60.00 0.02 0.67 82.42 7166.67 stress-ng: info: [18823] fp-error 1098584 60.04 1.25 0.00 18297.50 878867.20 stress-ng: info: [18823] fstat 6659 60.27 0.09 1.32 110.49 4722.70 stress-ng: info: [18823] full 234896 60.12 0.62 0.55 3907.23 200765.81 stress-ng: info: [18823] futex 128035 60.03 0.33 1.64 2133.02 64992.39 stress-ng: info: [18823] get 970 60.13 0.00 1.20 16.13 808.33 stress-ng: info: [18823] getdent 28184 60.11 0.03 1.09 468.87 25164.29 stress-ng: info: [18823] getrandom 27291 60.01 0.00 1.33 454.79 20519.55 stress-ng: info: [18823] handle 106865 60.10 0.03 1.18 1778.08 88318.18 stress-ng: info: [18823] hdd 11375 62.84 0.02 0.46 181.03 23697.92 stress-ng: info: [18823] heapsort 3 60.05 1.16 0.00 0.05 2.59 stress-ng: info: [18823] hsearch 3074 60.09 1.16 0.00 51.16 2650.00 stress-ng: info: [18823] icache 956 60.09 0.18 1.00 15.91 810.17 stress-ng: info: [18823] icmp-flood 84790 60.05 0.02 1.10 1412.07 75705.36 stress-ng: info: [18823] inode-flags 2208750 60.59 0.24 4.21 36455.28 496348.31 stress-ng: info: [18823] inotify 3 69.34 0.00 0.01 0.04 300.00 stress-ng: info: [18823] io 12 62.83 0.00 0.12 0.19 100.00 stress-ng: info: [18823] iomix 0 69.41 0.00 0.46 0.00 0.00 stress-ng: info: [18823] ioprio 120 60.57 0.00 0.34 1.98 352.94 stress-ng: info: [18823] itimer 448 60.02 0.26 1.14 7.46 320.00 stress-ng: info: [18823] kcmp 179882 60.04 0.14 0.93 2996.06 168114.02 stress-ng: info: [18823] key 1113 0.15 0.00 0.01 7312.55 111300.00 stress-ng: info: [18823] kill 913 60.12 0.00 1.46 15.19 625.34 stress-ng: info: [18823] klog 681 60.08 0.00 1.62 11.33 420.37 stress-ng: info: [18823] lease 11 60.14 0.13 2.18 0.18 4.76 stress-ng: info: [18823] link 9423 74.04 0.02 0.82 127.27 11217.86 stress-ng: info: [18823] locka 5787200 60.15 0.50 2.18 96215.09 2159402.99 stress-ng: info: [18823] lockbus 2170347 60.05 1.28 0.00 36143.46 1695583.59 stress-ng: info: [18823] lockf 40261 60.13 0.02 1.68 669.57 23682.94 stress-ng: info: [18823] lockofd 4612673 60.11 0.39 1.70 76738.38 2207020.57 stress-ng: info: [18823] longjmp 109103 60.05 1.45 0.00 1817.02 75243.45 stress-ng: info: [18823] lsearch 8 60.03 1.12 0.00 0.13 7.14 stress-ng: info: [18823] madvise 1 60.27 0.13 1.12 0.02 0.80 stress-ng: info: [18823] malloc 1312702 60.84 1.26 0.47 21576.93 758787.28 stress-ng: info: [18823] matrix 5782 60.02 1.16 0.00 96.33 4984.48 stress-ng: info: [18823] membarrier 635 60.11 0.01 0.00 10.56 63500.00 stress-ng: info: [18823] memcpy 1201 60.05 1.09 0.00 20.00 1101.83 stress-ng: info: [18823] memfd 5 60.34 0.06 1.10 0.08 4.31 stress-ng: info: [18823] memrate 3 60.10 1.78 0.06 0.05 1.63 stress-ng: info: [18823] memthrash 1134 60.21 9.68 0.06 18.83 116.43 stress-ng: info: [18823] mergesort 28 60.02 1.67 0.02 0.47 16.57 stress-ng: info: [18823] mincore 38348 60.04 0.12 1.19 638.75 29273.28 stress-ng: info: [18823] mknod 8192 74.97 0.06 1.89 109.27 4201.03 stress-ng: info: [18823] mlock 71710 63.38 0.02 2.00 1131.51 35500.00 stress-ng: info: [18823] mmap 1 60.39 0.64 1.02 0.02 0.60 stress-ng: info: [18823] mmapfork 59 60.07 2.59 11.66 0.98 4.14 stress-ng: info: [18823] mmapmany 480977 60.45 0.05 1.30 7956.90 356279.26 stress-ng: info: [18823] mq 3010570 60.09 0.32 2.78 50099.22 971151.61 stress-ng: info: [18823] mremap 9 60.31 0.03 1.06 0.15 8.26 stress-ng: info: [18823] msg 380072 60.24 0.04 1.34 6309.34 275414.49 stress-ng: info: [18823] msync 2066 60.89 0.02 0.42 33.93 4695.45 stress-ng: info: [18823] netdev 3 0.02 0.00 0.00 127.66 0.00 stress-ng: info: [18823] netlink-proc 725 60.00 0.00 0.15 12.08 4833.33 stress-ng: info: [18823] nice 316 60.00 1.61 5.39 5.27 45.14 stress-ng: info: [18823] nop 176511 60.02 1.65 0.01 2940.71 106331.93 stress-ng: info: [18823] null 296754 60.23 0.11 0.95 4926.75 279956.60 stress-ng: info: [18823] numa 16 63.02 0.04 1.40 0.25 11.11 stress-ng: info: [18823] opcode 3725 60.08 0.03 0.53 62.00 6651.79 stress-ng: info: [18823] open 15859 60.79 0.03 0.84 260.90 18228.74 stress-ng: info: [18823] personality 635838 60.01 0.44 0.65 10594.72 583337.61 stress-ng: info: [18823] pipe 1626214 60.13 0.65 2.37 27044.12 538481.46 stress-ng: info: [18823] poll 30940 60.00 0.02 0.18 515.67 154700.00 stress-ng: info: [18823] procfs 2 60.03 0.00 3.76 0.03 0.53 stress-ng: info: [18823] pthread 40463 60.57 0.14 2.98 668.02 12968.91 stress-ng: info: [18823] ptrace 1132919 60.00 0.32 3.43 18881.92 302111.73 stress-ng: info: [18823] pty 14 60.10 0.10 3.13 0.23 4.33 stress-ng: info: [18823] qsort 19 60.06 2.34 0.00 0.32 8.12 stress-ng: info: [18823] quota 0 0.31 0.00 0.00 0.00 0.00 stress-ng: info: [18823] radixsort 13 60.08 1.20 0.00 0.22 10.83 stress-ng: info: [18823] rdrand 549041 60.04 1.60 0.00 9144.49 343150.62 stress-ng: info: [18823] readahead 0 62.79 0.01 0.46 0.00 0.00 stress-ng: info: [18823] remap 271 60.06 0.02 1.07 4.51 248.62 stress-ng: info: [18823] rename 16500 60.89 0.02 0.44 270.98 35869.57 stress-ng: info: [18823] resources 2048 84.58 0.32 29.03 24.21 69.78 stress-ng: info: [18823] rlimit 21060 60.06 0.17 1.07 350.68 16983.87 stress-ng: info: [18823] rmap 19296 62.80 3.01 3.01 307.24 3205.32 stress-ng: info: [18823] rtc 5630 60.04 0.03 1.67 93.77 3311.76 stress-ng: info: [18823] schedpolicy 49456 60.00 0.02 0.07 824.26 549511.11 stress-ng: info: [18823] sctp 31 60.00 0.00 0.33 0.52 93.94 stress-ng: info: [18823] seal 141757 60.02 0.19 1.22 2361.88 100536.88 stress-ng: info: [18823] seccomp 5086 60.00 0.00 0.66 84.77 7706.06 stress-ng: info: [18823] seek 17 60.93 0.00 0.00 0.28 0.00 stress-ng: info: [18823] sem 86510151 60.04 2.14 0.50 1440812.94 32768996.59 stress-ng: info: [18823] sem-sysv 2958889 60.00 0.30 3.44 49314.01 791146.79 stress-ng: info: [18823] sendfile 70 60.47 0.00 1.88 1.16 37.23 stress-ng: info: [18823] shm 142 60.48 0.11 1.34 2.35 97.93 stress-ng: info: [18823] shm-sysv 193 60.09 0.05 0.32 3.21 521.62 stress-ng: info: [18823] sigfd 2396164 60.02 0.27 1.83 39922.84 1141030.48 stress-ng: info: [18823] sigfpe 1046486 60.07 0.25 1.00 17419.79 837188.80 stress-ng: info: [18823] sigpending 687953 60.04 0.17 0.84 11458.07 681141.58 stress-ng: info: [18823] sigq 2692662 60.21 0.16 0.86 44722.62 2639864.71 stress-ng: info: [18823] sigsegv 704513 60.04 0.22 0.83 11733.10 670964.76 stress-ng: info: [18823] sigsuspend 0 60.04 0.10 1.08 0.00 0.00 stress-ng: info: [18823] sleep 2032765 60.58 5.72 48.47 33557.00 37511.81 stress-ng: info: [18823] sock 1186 60.03 0.03 2.90 19.76 404.78 stress-ng: info: [18823] sockdiag 1281467 60.47 0.01 1.34 21191.14 949234.81 stress-ng: info: [18823] sockfd 0 4.97 0.01 0.04 0.00 0.00 stress-ng: info: [18823] sockpair 577622 60.56 0.07 1.46 9538.77 377530.72 stress-ng: info: [18823] softlockup 118408446 60.01 4.83 38.42 1973170.04 2737767.54 stress-ng: info: [18823] spawn 0 0.00 0.00 0.00 0.00 0.00 stress-ng: info: [18823] splice 145297 60.23 0.00 1.13 2412.48 128581.42 stress-ng: info: [18823] stack 0 61.56 0.05 1.98 0.00 0.00 stress-ng: info: [18823] stackmmap 889 62.78 0.02 0.41 14.16 2067.44 stress-ng: info: [18823] str 21920 60.02 1.32 0.00 365.24 16606.06 stress-ng: info: [18823] stream 34 60.50 1.30 0.03 0.56 25.56 stress-ng: info: [18823] swap 0 0.70 0.00 0.01 0.00 0.00 stress-ng: info: [18823] switch 747604 60.01 0.20 2.36 12458.28 292032.81 stress-ng: info: [18823] symlink 7964 73.98 0.10 3.24 107.65 2384.43 stress-ng: info: [18823] sync-file 0 62.78 0.00 0.42 0.00 0.00 stress-ng: info: [18823] sysfs 6 60.02 0.06 1.40 0.10 4.11 stress-ng: info: [18823] sysinfo 1462 60.04 0.03 1.95 24.35 738.38 stress-ng: info: [18823] tee 96190 60.11 0.05 2.57 1600.13 36713.74 stress-ng: info: [18823] timer 508528 60.01 0.69 0.38 8473.49 475259.81 stress-ng: info: [18823] timerfd 0 60.02 0.12 1.28 0.00 0.00 stress-ng: info: [18823] tlb-shootdown 727 60.00 0.10 1.06 12.12 626.72 stress-ng: info: [18823] tmpfs 0 62.42 0.32 2.96 0.00 0.00 stress-ng: info: [18823] tsc 1137609 60.03 1.04 0.00 18952.13 1093854.81 stress-ng: info: [18823] tsearch 10 59.76 1.73 0.02 0.17 5.71 stress-ng: info: [18823] udp 82593 60.01 0.02 1.65 1376.24 49456.89 stress-ng: info: [18823] udp-flood 54241 60.03 0.02 1.22 903.51 43742.74 stress-ng: info: [18823] unshare 5 150.39 0.01 0.02 0.03 166.67 stress-ng: info: [18823] urandom 25139 60.02 0.01 1.25 418.87 19951.59 stress-ng: info: [18823] userfaultfd 223687 60.06 0.05 0.72 3724.61 290502.60 stress-ng: info: [18823] utime 37399 60.11 0.02 0.72 622.21 50539.19 stress-ng: info: [18823] vecmath 2526 60.01 2.26 0.00 42.09 1117.70 stress-ng: info: [18823] vfork 40685 60.01 0.07 0.74 677.97 50228.40 stress-ng: info: [18823] vforkmany 32 60.02 0.00 0.02 0.53 1600.00 stress-ng: info: [18823] vm 0 60.03 1.54 0.07 0.00 0.00 stress-ng: info: [18823] vm-rw 210 60.08 0.00 1.36 3.50 154.41 stress-ng: info: [18823] vm-splice 430439 60.01 0.03 1.11 7172.91 377578.07 stress-ng: info: [18823] wait 393511 60.00 0.33 3.53 6558.06 101945.85 stress-ng: info: [18823] wcs 9918 60.02 1.13 0.01 165.24 8700.00 stress-ng: info: [18823] xattr 0 0.13 0.00 0.00 0.00 0.00 stress-ng: info: [18823] yield 117936821 60.23 5.84 26.03 1958060.44 3700559.18 stress-ng: info: [18823] zero 478886 60.01 0.10 0.97 7979.58 447557.01 stress-ng: info: [18823] zlib 38 60.56 1.82 0.00 0.63 20.88 stress-ng: info: [18823] zombie 6285 60.71 0.07 1.99 103.52 3050.97 stress-ng: info: [18823] for a 150.64s run time: stress-ng: info: [18823] 1205.13s available CPU time stress-ng: info: [18823] 94.38s user time ( 7.83%) stress-ng: info: [18823] 363.25s system time ( 30.14%) stress-ng: info: [18823] 457.63s total time ( 37.97%) stress-ng: info: [18823] load average: 194.64 186.96 81.48
stress-ng --cpu-method which cpu-method must be one of: all ackermann bitops crc16 cdouble cfloat clongdouble correlate decimal32 decimal64 decimal128 double djb2a euler explog fibonacci fnv1a fft float gamma gcd gray hamming hanoi hyperbolic idct int128 int64 int32 int16 int8 int128float int128double int128longdouble int128decimal32 int128decimal64 int128decimal128 int64float int64double int64longdouble int32float int32double int32longdouble jenkin jmp ln2 longdouble loop matrixprod nsqrt omega phi pi pjw prime psi rand rgb sdbm sieve sqrt trig zeta
stress-ng --class which Unknown class: 'which', available classes: cpu cpu-cache io interrupt memory network os scheduler vm
stress-ng --matrix-method which matrix-method must be one of: all add div frobenius mult prod sub hadamard trans
stress-ng --class cpu-cache --sequential 0 -t 60 --times stress-ng: info: [32258] dispatching hogs: 4 bsearch, 4 cache, 4 hsearch, 4 lsearch, 4 memcpy, 4 qsort, 4 tsearch stress-ng: info: [32258] successful run completed in 420.33s stress-ng: info: [32258] for a 420.33s run time: stress-ng: info: [32258] 1681.32s available CPU time stress-ng: info: [32258] 1448.88s user time ( 86.18%) stress-ng: info: [32258] 0.96s system time ( 0.06%) stress-ng: info: [32258] 1449.84s total time ( 86.23%)
stress-ng --cpu 0 --cpu-method fft -t 5m --times stress-ng: info: [13424] dispatching hogs: 4 cpu stress-ng: info: [13424] successful run completed in 300.00s stress-ng: info: [13424] for a 300.00s run time: stress-ng: info: [13424] 1200.02s available CPU time stress-ng: info: [13424] 1169.09s user time ( 97.42%) stress-ng: info: [13424] 0.35s system time ( 0.03%) stress-ng: info: [13424] 1169.44s total time ( 97.45%)
stress-ng --random 50 -t 60 --metrics-brief --times stress-ng: info: [31751] dispatching hogs: 1 cache, 3 dentry, 4 fault, 2 futex, 3 get, 2 hsearch, 2 iosync, 4 kill, 2 lsearch, 1 memcpy, 1 pipe, 1 rdrand, 2 rename, 2 seek, 1 sigq, 4 sigsegv, 2 socket, 3 symlink, 1 sysinfo, 1 timer, 1 urandom, 1 utime, 2 wait, 2 yield, 2 zero stress-ng: info: [31751] successful run completed in 60.33s stress-ng: info: [31751] stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s stress-ng: info: [31751] (secs) (secs) (secs) (real time) (usr+sys time) stress-ng: info: [31751] cache 102 60.04 3.67 0.08 1.70 27.20 stress-ng: info: [31751] dentry 288642 60.15 0.85 9.28 4798.35 28493.78 stress-ng: info: [31751] fault 241810 60.03 0.14 13.51 4027.89 17715.02 stress-ng: info: [31751] futex 1544005 60.00 1.73 13.15 25731.53 103763.78 stress-ng: info: [31751] get 629558 60.02 0.83 11.31 10489.28 51858.15 stress-ng: info: [31751] hsearch 14568 60.01 7.81 0.19 242.75 1821.00 stress-ng: info: [31751] iosync 1291 60.03 0.00 5.82 21.51 221.82 stress-ng: info: [31751] kill 56195919 60.02 1.49 13.94 936293.17 3641990.86 stress-ng: info: [31751] lsearch 43 60.08 8.31 0.11 0.72 5.11 stress-ng: info: [31751] memcpy 3067 60.00 3.80 0.09 51.12 788.43 stress-ng: info: [31751] pipe 1627230 60.02 1.31 6.21 27113.58 216386.97 stress-ng: info: [31751] rdrand 3125352 60.01 4.22 0.01 52082.96 738853.90 stress-ng: info: [31751] rename 787500 60.03 1.05 6.20 13118.04 108620.69 stress-ng: info: [31751] seek 2370234 60.03 0.35 6.90 39483.31 326928.83 stress-ng: info: [31751] sigq 2844432 60.03 0.91 7.36 47380.57 343945.83 stress-ng: info: [31751] sigsegv 9223407 60.01 3.16 12.61 153704.58 584870.45 stress-ng: info: [31751] socket 6634 60.01 0.21 13.86 110.54 471.50 stress-ng: info: [31751] symlink 174917 60.22 0.55 9.87 2904.62 16786.66 stress-ng: info: [31751] sysinfo 121440 59.96 0.15 3.43 2025.42 33921.79 stress-ng: info: [31751] timer 1221430 60.01 1.12 2.34 20353.64 353014.45 stress-ng: info: [31751] urandom 3243 60.01 0.00 3.45 54.04 940.00 stress-ng: info: [31751] utime 751193 60.00 0.10 3.58 12519.69 204128.53 stress-ng: info: [31751] wait 1098475 60.00 1.62 17.59 18308.03 57182.46 stress-ng: info: [31751] yield 12705921 60.00 0.73 6.46 211764.92 1767165.65 stress-ng: info: [31751] zero 14711675 60.02 0.41 7.63 245115.78 1829810.32 stress-ng: info: [31751] for a 60.33s run time: stress-ng: info: [31751] 241.31s available CPU time stress-ng: info: [31751] 44.81s user time ( 18.57%) stress-ng: info: [31751] 175.27s system time ( 72.63%) stress-ng: info: [31751] 220.08s total time ( 91.20%)
For bug reports, visit: Stress-ng at LaunchPad