Blog – Page 62 – TRUEANGLE

Perl Testing using system function

commandline session

$cat test4.pl
#!/usr/bin/perl
use strict;
use warnings;

system "echo 1 > 1";
print "n";
system "echo 2 > 2";
print "n";
system "echo hello";
print "n";
$perl test4.pl


hello

$cat 1
1
$cat 2
2
$

TEST WITH Perl extension for ICalendar date objects

commandline session

$cat test3.pl
#!/usr/bin/perl -w

use Test::Simple tests => 2;

use Date::ICal;

my $ical = Date::ICal->new;         # create an object
ok( defined $ical );                # check that we got something
ok( $ical->isa('Date::ICal') );     # and it's the right class

$perl test3.pl
1..2
ok 1
ok 2
$

TESTING WITH Perl

commandline session

$perl test1.pl
1..1
ok 1
$cat test1.pl
#!/usr/bin/perl -w

print "1..1n";

print 1 + 1 == 2 ? "ok 1n" : "not ok 1n";
$perl
1+1
$perl -e
No code specified for -e.
$perl -d

Loading DB routines from perl5db.pl version 1.33
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

Debugged program terminated.  Use q to quit or R to restart,
  use o inhibit_exit to avoid stopping after program termination,
  h q, h R or h o to get additional info.
  DB quit

  DB exit
$perl -d -e 1

Loading DB routines from perl5db.pl version 1.33
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

main::(-e:1):	1
  DB 1+1

  DB print 1+1
2
  DB print 1 + 1 == 2
1
  DB print 1 + 1 == 3

  DB print 2 + 2 == 3

  DB print 2 + 2 == 4
1
  DB

Linux KERNEL TESTING asynctest TINKER ON PYTHON SHELL

$python
Python 2.7.3 (default, Jun 15 2012, 15:26:07)
[GCC 4.7.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from autotest.client import utils, test
>>> x = utils.AsyncJob("sleep 1 && echo hi && sleep 1 && echo hi && sleep 1 && echo hi && sleep 1")
DEBUG:root:Running 'sleep 1 && echo hi && sleep 1 && echo hi && sleep 1 && echo hi && sleep 1'
>>> x.wait_for()
* Command:
    sleep 1 && echo hi && sleep 1 && echo hi && sleep 1 && echo hi && sleep 1
Exit status: 0
Duration: 28.2366471291

stdout:
hi
hi
hi
>>> y = utils.AsyncJob("sleep 100")
DEBUG:root:Running 'sleep 100'
>>> y.wait_for()
* Command:
    sleep 100
Exit status: 0
Duration: 100.024924994

>>> x.wait_for()
* Command:
    sleep 1 && echo hi && sleep 1 && echo hi && sleep 1 && echo hi && sleep 1
Exit status: 0
Duration: 441.024215937

stdout:
hi
hi
hi
>>> y.wait_for()
* Command:
    sleep 100
Exit status: 0
Duration: 121.19008112

>>> print "Process 2 took %d to be killed" % (time.time()-t)
Traceback (most recent call last):
  File "", line 1, in 
NameError: name 'time' is not defined
>>> y = utils.AsyncJob("sleep 100")
DEBUG:root:Running 'sleep 100'
>>> print "Process 2 took %d to be killed" % (time.time()-t)
Traceback (most recent call last):
  File "", line 1, in 
NameError: name 'time' is not defined
>>> y.wait_for()
* Command:
    sleep 100
Exit status: 0
Duration: 100.026224852

>>>

Linux KERNEL TESTING asynctest

commandline session

$sudo autotest-local run asynctest/
18:58:57 INFO | Writing results to /usr/local/lib/python2.7/dist-packages/autotest/client/results/default
18:58:58 INFO | START	----	----	timestamp=13625710038	localtime=Mar 06 18:58:58
18:58:58 INFO | 	START	asynctest	asynctest	timestamp=13625710038	localtime=Mar 06 18:58:58
18:59:00 INFO | Process 1 stdout is now hi
18:59:00 INFO | hi
18:59:00 INFO |
18:59:02 INFO | Process 1 result object is: * Command:
18:59:02 INFO |     sleep 1 && echo hi && sleep 1 && echo hi && sleep 1 && echo hi && sleep 1
18:59:02 INFO | Exit status: 0
18:59:02 INFO | Duration: 4.03056716919
18:59:02 INFO |
18:59:02 INFO | stdout:
18:59:02 INFO | hi
18:59:02 INFO | hi
18:59:02 INFO | hi
18:59:03 INFO | Process 2 took 1 to be killed
18:59:03 INFO | 		GOOD	asynctest	asynctest	timestamp=13625710043	localtime=Mar 06 18:59:03	completed successfully
18:59:03 INFO | 	END GOOD	asynctest	asynctest	timestamp=13625710043	localtime=Mar 06 18:59:03
18:59:03 INFO | END GOOD	----	----	timestamp=13625710043	localtime=Mar 06 18:59:03
$

R Plotting a Function Curve

commandline session

> curve(x^3 - 5*x, from=-4, to=4)
> png(file="RcurveA.png")
> curve(x^3 - 5*x, from=-4, to=4)
> dev.off()
null device
          1
> png(file="RcurveB.png")
> curve(x^3 - 5*x, from=-4, to=0)
> dev.off()
null device
          1
> png(file="RcurveC.png")
> curve(x^3 - 5*x, from=10, to=50)
> dev.off()
null device
          1
>

Linux KERNEL TESTING signaltest

ABOUT Signal(IPC)

Signals are a limited form of inter-process communication (IPC), typically used in Unix, Unix-like, and other POSIX-compliant operating systems. A signal is an asynchronous notification sent to a process or to a specific thread within the same process in order to notify it of an event that occurred. Signals originated in 1970s Bell Labs Unix and have been more recently specified in the POSIX standard.

When a signal is sent, the operating system interrupts the target process' normal flow of execution to deliver the signal. Execution can be interrupted during any non-atomic instruction. If the process has previously registered a signal handler, that routine is executed. Otherwise, the default signal handler is executed.

TYPICAL COMMANDLINE SESSION
[bash]
$sudo ./signaltest –help
signaltest V 0.85
Usage:
signaltest <options>

-b USEC –breaktrace=USEC send break trace command when latency > USEC
-l LOOPS –loops=LOOPS number of loops: default=0(endless)
-p PRIO –prio=PRIO priority of highest prio thread
-q –quiet print only a summary on exit
-t NUM –threads=NUM number of threads: default=2
-m –mlockall lock current and future memory allocations
-v –verbose output values on stdout for statistics
format: n:c:v n=tasknum c=count v=value in us

$sudo ./signaltest -v -t 10 -l 10
0: 0: 0
0: 1: 118
0: 2: 91
0: 3: 83
0: 4: 80
0: 5: 78
0: 6: 78
0: 7: 80
0: 8: 78
0: 9: 79
$

[/bash]
LINK
https://en.wikipedia.org/wiki/Signal_(IPC)
https://www.ibm.com/developerworks/community/blogs/aimsupport/entry/Finding_the_source_of_signals_on_Linux_with_strace_auditd_or_Systemtap?lang=en

Linux KERNEL TESTING cyclictest DETAIL

ABOUT SOFTWARE TESTING

Software testing is an investigation conducted to provide stakeholders with information about the quality of the software product or service under test.[1] Software testing can also provide an objective, independent view of the software to allow the business to appreciate and understand the risks of software implementation. Test techniques include the process of executing a program or application with the intent of finding software bugs (errors or other defects), and verifying that the software product is fit for use.

TYPICAL COMMANDLINE RELATED EXPOSURE
[bash]
$sudo ./cyclictest –smp -p95 -f -b 200
# /dev/cpu_dma_latency set to 0us
INFO: debugfs mountpoint: /sys/kernel/debug/tracing/
could not set ftrace_enabled to 1
Requested tracer ” not available
could not set tracing_max_latency to 0
policy: fifo: loadavg: 0.16 0.24 0.17 1/364 16976

T: 0 (16976) P:95 I:1000 C: 2902 Min: 7 Act: 15 Avg: 20 Max: 169
# Thread Ids: 16976
# Break thread: 16976
# Break value: 246
could not set ftrace_enabled to 0
[/bash]
[bash]
$sudo ./cyclictest –smp -p95 -f -b 100
# /dev/cpu_dma_latency set to 0us
INFO: debugfs mountpoint: /sys/kernel/debug/tracing/
could not set ftrace_enabled to 1
Requested tracer ” not available
could not set tracing_max_latency to 0
policy: fifo: loadavg: 0.27 0.15 0.14 2/361 16999

T: 0 ( 0) P:95 I:1000 C: 0 Min:1000000 Act: 0 Avg: 0 Max: 0
# Thread Ids: 16999
# Break thread: 16999
# Break value: 161
could not set ftrace_enabled to 0
[/bash]
[bash]
$sudo ./cyclictest –smp -p95 -f -b 1000
# /dev/cpu_dma_latency set to 0us
INFO: debugfs mountpoint: /sys/kernel/debug/tracing/
could not set ftrace_enabled to 1
Requested tracer ” not available
could not set tracing_max_latency to 0
policy: fifo: loadavg: 0.17 0.14 0.14 3/361 17002

T: 0 (17002) P:95 I:1000 C: 35587 Min: 7 Act: 32 Avg: 20 Max: 264
^C# Thread Ids: 17002
could not set ftrace_enabled to 0
$

[/bash]
LINKS
https://events.static.linuxfound.org/sites/events/files/slides/cyclictest.pdf
https://en.wikipedia.org/wiki/Software_testing

R boxplot fsstress Linux Kernel Test

commandline session


> chown  creat  dread  dwrite  fdata  fdatasync  fsync  getdents  link  mkdir  mknod  read  readlink  rename  link  mkdir  mknod  read  readlink  rmdir  stat  symlink  sync  truncate  unlink  write  boxplot(chown,creat,dread,dwrite,fdatasync,fsync,getdents,link,mkdir,mknod,read,readlink,rename,rmdir,stat,symlink,sync,truncate,unlink,write)
> boxplot(chown,creat,dread,dwrite,fdatasync,fsync,getdents,link,mkdir,mknod,read,readlink,rename,rmdir,stat,symlink,sync,truncate,unlink,write)
> png(file="Rfsstress.png")
> boxplot(chown,creat,dread,dwrite,fdatasync,fsync,getdents,link,mkdir,mknod,read,readlink,rename,rmdir,stat,symlink,sync,truncate,unlink,write)
> dev.off
function (which = dev.cur())
{
    if (which == 1)
        stop("cannot shut down device 1 (the null device)")
    .Internal(dev.off(as.integer(which)))
    dev.cur()
}


> dev.off
function (which = dev.cur())
{
    if (which == 1)
        stop("cannot shut down device 1 (the null device)")
    .Internal(dev.off(as.integer(which)))
    dev.cur()
}


> dev.off()
null device
          1
> png(file="Rfsstress.png")
> boxplot(chown,creat,dread,dwrite,fdatasync,fsync,getdents,link,mkdir,mknod,read,readlink,rename,rmdir,stat,symlink,sync,truncate,unlink,write)
> dev.off()
null device
          1
>

fsstress ZEROS FREQUENCIES OF ALL OPERATIONS

commandline session

$sudo ./fsstress   -z  -c -S -d /home/jeffrin/fs/  -p 100 -n 100
               chown 0/0 write op
               creat 0/0 write op
               dread 0/0
              dwrite 0/0 write op
           fdatasync 0/0 write op
               fsync 0/0 write op
            getdents 0/0
                link 0/0 write op
               mkdir 0/0 write op
               mknod 0/0 write op
                read 0/0
            readlink 0/0
              rename 0/0 write op
               rmdir 0/0 write op
                stat 0/0
             symlink 0/0 write op
                sync 0/0
            truncate 0/0 write op
              unlink 0/0 write op
               write 0/0 write op

seed = 1362490240
$