Building lmbench3
To build lmbench3 for these experiments, we downloaded the source, extracted the files using untar, and changed into the lmbench3 directory using cd. The lmbench3 README explains that you can run the full suite of tests with the make results command.
Tip: There is a bug in the lmbench3 code (as noted in this kerneltrap.org thread for example: http://kerneltrap.org/node/14792). We encountered this error when running the make command:
gmake[1]: *** No rule to make target '../SCCS/s.ChangeSet', needed by 'bk.ver'. Stop.
gmake[1]: Leaving directory '<dir>/lmbench3/src'
make: *** [lmbench] Error 2We used the touch command to create the missing file to get the make to complete smoothly. From the lmbench3 directory, we entered the following:
mkdir ./SCCS
touch ./SCCS/s.ChangeSetafter that it will looks like this:
.
├── bin
│ └── armv7l-linux-gnu
├── doc
├── results
│ └── armv7l-linux-gnu
├── SCCS
│ └── s.ChangeSet
├── scripts
└── src
└── webpage-lm
9 directories
Note that the default Makefile options were used for this article. Adding flags such as compiler optimization levels can cause some problems with the benchmark's accounting code, which can lead to inaccurate measurements.
cd src
make results
this will compile the whole package and run the test. it will takes more than one hour, so have have a cup of coffee first.
cd ../results/
make summary
This is the result of my Beaglebone Black (rev C) running debian armhf:
L M B E N C H 3 . 0 S U M M A R Y
------------------------------------
(Alpha software, do not distribute)
Basic system parameters
------------------------------------------------------------------------------
Host OS Description Mhz tlb cache mem scal
pages line par load
bytes
--------- ------------- ----------------------- ---- ----- ----- ------ ----
B1 Linux 3.8.13+ armv7l-linux-gnu 995 15 64 1.0000 1
B1 Linux 3.8.13+ armv7l-linux-gnu 994 30 64 1.0000 1
Processor, Processes - times in microseconds - smaller is better
------------------------------------------------------------------------------
Host OS Mhz null null open slct sig sig fork exec sh
call I/O stat clos TCP inst hndl proc proc proc
--------- ------------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
B1 Linux 3.8.13+ 995 1.30 2.47 3.77 9.35 21.6 1.07 5.22 893. 3063 7104
B1 Linux 3.8.13+ 994 4.26 1.17 4.06 9.71 21.6 1.08 5.22 898. 6288 7153
Basic integer operations - times in nanoseconds - smaller is better
-------------------------------------------------------------------
Host OS intgr intgr intgr intgr intgr
bit add mul div mod
--------- ------------- ------ ------ ------ ------ ------
B1 Linux 3.8.13+ 1.0100 0.1000 6.1300 73.0 24.1
B1 Linux 3.8.13+ 1.0100 0.1000 6.1300 73.0 24.1
Basic float operations - times in nanoseconds - smaller is better
-----------------------------------------------------------------
Host OS float float float float
add mul div bogo
--------- ------------- ------ ------ ------ ------
B1 Linux 3.8.13+ 8.9600 10.1 33.2 104.7
B1 Linux 3.8.13+ 19.8 10.1 33.2 104.8
Basic double operations - times in nanoseconds - smaller is better
------------------------------------------------------------------
Host OS double double double double
add mul div bogo
--------- ------------- ------ ------ ------ ------
B1 Linux 3.8.13+ 8.9600 11.1 57.3 135.2
B1 Linux 3.8.13+ 8.9600 11.1 57.3 134.9
Context switching - times in microseconds - smaller is better
-------------------------------------------------------------------------
Host OS 2p/0K 2p/16K 2p/64K 8p/16K 8p/64K 16p/16K 16p/64K
ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw
--------- ------------- ------ ------ ------ ------ ------ ------- -------
B1 Linux 3.8.13+ 19.9 14.1 18.0 22.5 214.8 59.7 243.6
B1 Linux 3.8.13+ 38.9 13.8 25.9 26.5 217.1 57.8 243.7
*Local* Communication latencies in microseconds - smaller is better
---------------------------------------------------------------------
Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP
ctxsw UNIX UDP TCP conn
--------- ------------- ----- ----- ---- ----- ----- ----- ----- ----
B1 Linux 3.8.13+ 19.9 35.4 43.5 57.6 82.1 242.
B1 Linux 3.8.13+ 38.9 38.1 43.2 57.0 82.1 247.
File & VM system latencies in microseconds - smaller is better
-------------------------------------------------------------------------------
Host OS 0K File 10K File Mmap Prot Page 100fd
Create Delete Create Delete Latency Fault Fault selct
--------- ------------- ------ ------ ------ ------ ------- ----- ------- -----
B1 Linux 3.8.13+ 12.9K 1.102 5.11830 7.303
B1 Linux 3.8.13+ 112.8 88.5 153.8 86.9 12.9K 0.976 5.07480 7.308
*Local* Communication bandwidths in MB/s - bigger is better
-----------------------------------------------------------------------------
Host OS Pipe AF TCP File Mmap Bcopy Bcopy Mem Mem
UNIX reread reread (libc) (hand) read write
--------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- -----
B1 Linux 3.8.13+ 309. 288. 124. 215.1 274.5 213.2 214.8 274. 1498.
B1 Linux 3.8.13+ 354. 221. 125. 219.4 274.3 214.4 214.4 274. 1498.
Memory latencies in nanoseconds - smaller is better
(WARNING - may not be correct, check graphs)
------------------------------------------------------------------------------
Host OS Mhz L1 $ L2 $ Main mem Rand mem Guesses
--------- ------------- --- ---- ---- -------- -------- -------
B1 Linux 3.8.13+ 994 3.0580 11.8 215.6 425.9