Topic PXE Boot Explanation The Preboot eXecution Environment (PXE, also known as Pre-Execution Environment; sometimes pronounced “pixie”) is an environment to boot computers using a network interface independently of data storage devices (like hard disks) or installed operating systems. PXE was introduced as part of the Wired for Management framework by Intel and is described …
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bubble sort testing… 0.00006 Ver — 4000 No.’s related
$time php bubble.php real 0m7.404s user 0m7.012s sys 0m0.080s $time php bubble.php real 0m7.333s user 0m7.044s sys 0m0.068s $time php bubble.php real 0m7.393s user 0m7.068s sys 0m0.100s $time php bubble.php real 0m7.345s user 0m7.024s sys 0m0.104s $time php bubble.php real 0m7.545s user 0m7.224s sys 0m0.080s $time php bubble.php real 0m7.275s user 0m6.992s sys 0m0.072s $time …
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What is a TASK_KILLABLE state in Linux ?
ABOUT TASK_KILLABLE state TASK_KILLABLE sleeping state. Like most versions of Unix, Linux has two fundamental ways in which a process can be put to sleep. A process which is placed in the TASK_INTERRUPTIBLE state will sleep until either (1) something explicitly wakes it up, or (2) a non-masked signal is received. The TASK_UNINTERRUPTIBLE state, instead, …
obnoxious
noxious means injurious to physical or mental health; obnoxious means very offensive, objectionable, or unpleasant source : http://thesaurus.com/browse/obnoxious
udev – Linux dynamic device management
ABOUT UDEV udev – Linux dynamic device management udev (userspace /dev) is a device manager for the Linux kernel CONFIG FILE RELATED # do not edit this file, it will be overwritten on update ACTION==”remove”, GOTO=”cdrom_end” SUBSYSTEM!=”block”, GOTO=”cdrom_end” KERNEL!=”sr[0-9]*|xvd*”, GOTO=”cdrom_end” ENV{DEVTYPE}!=”disk”, GOTO=”cdrom_end” # unconditionally tag device as CDROM KERNEL==”sr[0-9]*”, ENV{ID_CDROM}=”1″ # media eject button pressed …
bubble sort testing… 0.00005 Ver — 2000 No.’s related
$time php bubble.php real 0m2.076s user 0m1.736s sys 0m0.052s $time php bubble.php real 0m1.8100s user 0m1.680s sys 0m0.044s $time php bubble.php real 0m1.935s user 0m1.672s sys 0m0.052s $time php bubble.php real 0m1.861s user 0m1.676s sys 0m0.040s $time php bubble.php real 0m2.076s user 0m1.708s sys 0m0.064s $time php bubble.php real 0m1.850s user 0m1.640s sys 0m0.060s $time …
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What is a dirty inode and what are dirty bytes ?
What is a Dirtied inode It is a common computer term that data in a cache is “clean” when it has been synchronized, and “dirty” when it is different. A dirty inode has had new data written into it but it has not been written to disk. source : http://serverfault.com/questions/56374/dirtied-inode dirty_inode: this method is called …
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The atime and noatime attribute
The atime and noatime attribute Linux records information about when files were created and last modified as well as when it was last accessed. There is a cost associated with recording the last access time. The ext2 file system of Linux has an attribute that allows the super-user to mark individual files such that their …
bubble sort testing… 0.00004 Ver — 1000 No.’s related
$time php bubble.php real 0m0.846s user 0m0.388s sys 0m0.036s $time php bubble.php real 0m0.707s user 0m0.368s sys 0m0.032s $time php bubble.php real 0m0.718s user 0m0.384s sys 0m0.024s $time php bubble.php real 0m0.768s user 0m0.372s sys 0m0.036s $time php bubble.php real 0m0.556s user 0m0.432s sys 0m0.024s $time php bubble.php real 0m0.476s user 0m0.372s sys 0m0.040s $time …
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block_dump enables block I/O debugging when set to a nonzero value
When this flag is set, Linux reports all disk read and write operations that take place, and all block dirtyings done to files. This makes it possible to debug why a disk needs to spin up, and to increase battery life even more. The output of block_dump is written to the kernel output, and it …
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