{"id":8244,"date":"2013-03-03T17:42:50","date_gmt":"2013-03-03T17:42:50","guid":{"rendered":"http:\/\/www.beautifulwork.org\/?p=8244"},"modified":"2013-03-03T17:42:50","modified_gmt":"2013-03-03T17:42:50","slug":"linux-kernel-testing-signaltest","status":"publish","type":"post","link":"https:\/\/www.trueangle.org\/index.php\/2013\/03\/03\/linux-kernel-testing-signaltest\/","title":{"rendered":"Linux KERNEL TESTING signaltest"},"content":{"rendered":"

ABOUT Signal(IPC)<\/u><\/p>\n

\nSignals 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.\n\nWhen 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.\n<\/pre>\n
TYPICAL COMMANDLINE SESSION<\/u>
\n[bash]
\n$sudo .\/signaltest –help
\nsignaltest V 0.85
\nUsage:
\nsignaltest <options><\/p>\n
-b USEC  –breaktrace=USEC send break trace command when latency > USEC
\n-l LOOPS –loops=LOOPS     number of loops: default=0(endless)
\n-p PRIO  –prio=PRIO       priority of highest prio thread
\n-q       –quiet           print only a summary on exit
\n-t NUM   –threads=NUM     number of threads: default=2
\n-m       –mlockall        lock current and future memory allocations
\n-v       –verbose         output values on stdout for statistics
\n                           format: n:c:v n=tasknum c=count v=value in us<\/p>\n
$sudo .\/signaltest -v -t 10 -l 10
\n       0:       0:       0
\n       0:       1:     118
\n       0:       2:      91
\n       0:       3:      83
\n       0:       4:      80
\n       0:       5:      78
\n       0:       6:      78
\n       0:       7:      80
\n       0:       8:      78
\n       0:       9:      79
\n$<\/p>\n
[\/bash]
\nLINK
\nhttps:\/\/en.wikipedia.org\/wiki\/Signal_(IPC)<\/a>
\nhttps:\/\/www.ibm.com\/developerworks\/community\/blogs\/aimsupport\/entry\/Finding_the_source_of_signals_on_Linux_with_strace_auditd_or_Systemtap?lang=en<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
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 … <\/p>\n
Continue reading “Linux KERNEL TESTING signaltest”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[83],"tags":[988,1447,1563,1567],"_links":{"self":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/8244"}],"collection":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/comments?post=8244"}],"version-history":[{"count":0,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/8244\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/media?parent=8244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/categories?post=8244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/tags?post=8244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}