Neo,
can u please shorten the reply timer to like 1 min or so. It is prolly just me but i end up passing on replying to posts due to i hate waiting for my timer to reset w/ a 2.5 mins wait. (2 Replies)
I'm trying generate an interrupt every 1 seconds using itimer and My clock is not running. This is what i did :
printf("about to sleep for 1 second \n");
signal(SIGALRM, wakeup);
//myTimer.it_interval.tv_sec=0;
//myTimer.it_interval.tv_usec =0;
... (5 Replies)
Hi!,
My shell script takes a quite a long time to execute.. Nothing appears on the screen during this period.. User are left guessing... whats going on????????????
Any ideas on how to create a small timer script which print a word on screen say " wait.. Program running" after every 10 seconds... (3 Replies)
Hi all,
Wanted to a create a shell script
-----------------------------------------------------------------------
1) which when called will start a timer and wait for 48 hours.
after 48 hours it will call some function(say XYZ)
2) Whenever this shell script is called (can be called... (3 Replies)
Hello fellows,
I am new in this forum, i would appreciate your assistance.
I need a timming system for my vnc desktops (Cybercafe timer stuff).
Each unix user login to my server only with vnc, and i want to write a program that can generate timer tickets and have control on the time used for... (0 Replies)
Hello fellows,
I am new in this forum, i would appreciate your assistance.
I need a timming system for my vnc desktops (Cybercafe timer stuff).
Each unix user login to my server only with vnc, and i want to write a program that can generate timer tickets and have control on the time used for... (1 Reply)
hello all
since a process running in kernel mode cannnot be preempted by any other process what would be the status of Timer interrupt that occurs when the time quantum of a process is elapsed?
thanks (2 Replies)
I'm running long integrations on a remote server, and I'm working in terminal in a tcsh shell.
I'm looking to write ONLY the timing statistics to a file.
For example:
$time ls >timer.out
writes both the files in my current directory & the timer statistics to the file timer.out.
I only... (2 Replies)
Discussion started by: elemonier
2 Replies
LEARN ABOUT FREEBSD
attimer
ATTIMER(4) BSD Kernel Interfaces Manual ATTIMER(4)NAME
attimer -- i8254 Programmable Interval Timer (AT Timer) driver
SYNOPSIS
This driver is a mandatory part of x86 kernels.
The following tunables are settable from the loader(8):
hint.attimer.X.clock
controls support for the event timer functionality. Setting this value to 0 disables it. The default value is 1.
hint.attimer.X.timecounter
controls support for the time counter functionality. Setting this value to 0 disables it. The default value is 1.
hw.i8254.freq
allows overriding the default counter frequency. The same value is also available at run-time via the machdep.i8254_freq sysctl.
DESCRIPTION
This driver uses i8254 Programmable Interval Timer (AT Timer) hardware to supply the kernel with one timecounter and one event timer, and to
generate sound tones for the system speaker. This hardware includes three channels. Each channel includes a 16 bit counter which decreases
with a known, platform-dependent frequency. Counters can operate in several different modes, including periodic and one-shot. The output of
each channel has platform-defined wiring: one channel is wired to the interrupt controller and may be used as event timer, one channel is
wired to the speaker and used to generate sound tones, and one timer is reserved for platform purposes.
The attimer driver uses a single hardware channel to provide both time counter and event timer functionality. To make this possible, the
respective counter must be running in periodic mode. As a result, the one-shot event timer mode is supported only when time counter func-
tionality is disabled.
The event timer provided by the driver is irrelevant to CPU power states.
SEE ALSO apic(4), atrtc(4), eventtimers(4), hpet(4), timecounters(4)BSD May 26, 2014 BSD