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Topic: CPU time

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	Processor And CPU Time - The GNU C Library (Site not responding. Last check: 2007-10-16)
		For that, calendar time and elapsed times are useless because a process may spend time waiting for I/O or for other processes to use the CPU.
		CPU time (see Time Basics) is represented by the data type
		While arbitrary in general, the event is always the same event for any particular process, so you can always measure how much time on the CPU a particular computation takes by examinining the process' CPU time before and after the computation.
	www.gnu.org /software/libc/manual/html_node/Processor-And-CPU-Time.html (222 words)

	Penn Engineering - CETS Answers - What is CPU time and how is it measured?
		CPU time is how much time a computer's processor actually spends running your command.
		Multi-tasking computers split their time among many processes (giving the illusion of running several processes at once, but really only switching from running one to the next very quickly), so how long a command runs is not an indication of how much CPU time it used.
		CPU time only used when the computer is doing something, like updating the display or performing calculations.
	www.seas.upenn.edu /cets/answers/cputime.html (585 words)

	CPU Reservations and Time Constraints
		CPU scheduling overhead is bounded by a constant and is not a function of the number of schedulable tasks.
		Thus, it is possible to assign specific future time intervals for the execution of the time constraint, both from the activity of the thread requesting the time constraint and from the free intervals.
		While free CPU time is plentiful, constraint feasibility is hardly influenced by the reservation, but once it becomes scarce, the reservation guarantees sufficient time to respond in approximately 500ms (50ms of work with a 10% reservation), unlike the no-reservation case where the response time is unbounded.
	research.microsoft.com /~mbj/papers/sosp97/sosp97.html (11752 words)

	SGI TPL View (time)
		By default, this report includes the elapsed time the command spent running, the CPU time spent in execution of the command its reaped children, and the CPU time spent executing system code by the command and its reaped children.
		These result from a process being switched out at the end of its CPU time slice or being preempted by a higher priority process.
		Note that timing shell pipe lines may not produce the results that you think they should.
	techpubs.sgi.com /library/tpl/cgi-bin/getdoc.cgi?coll=0650&db=man&fname=/usr/share/catman/u_man/cat1/time.z (935 words)

	Penn Engineering - CETS Answers - How is the CPU Time Calculated?
		The CPU time used by a given process is the amount of time that a CPU is being used to execute that processes instructions.
		When we talk about the CPU time that a process or user has used, we're generally talking about the sum of user and system time.
		In the similar sense, the CPU time spent by the systems administraters is overhead.
	www.seas.upenn.edu /cets/answers/cputime2.html (491 words)

	What is CPU time? - A Word Definition From the Webopedia Computer Dictionary
		During the execution of most programs, the CPU sits idle much of the time while the computer fetches data from the keyboard or disk, or sends data to an output device.
		The CPU time of an executing program, therefore, is generally much less than the total execution time of the program.
		CPU times are used for a variety of purposes: to compare the speed of two different processors, to gauge how CPU-intensive a program is, and to measure the amount of processing time being allocated to different programs in a multitasking environment.
	www.webopedia.com /TERM/C/CPU_time.html (292 words)

	CPU Time (Site not responding. Last check: 2007-10-16)
		This column displayes the accumulated CPU time for each process.
		This is the amount of time that any cpu in the system has spent actually running this process.
		When a time value is greater than or equal to 1000 minutes, it is displayed as hours with the suffix H.
	www.groupsys.com /top/display/time.html (98 words)

	NTUA HPC Unit: Policy Guidelines (Site not responding. Last check: 2007-10-16)
		At the end of each month a Usage Report is generated for every group stating how much CPU time the group has spent.
		The amount of time is measured with the standard accounting facilities of the operating system.
		This means that if a program runs for multiple days it will look like it is using no CPU time until the last day when the total CPU time will be reported.
	www.hpc.ntua.gr /en/policy.html (336 words)

	CPU time - Wikipedia, the free encyclopedia
		Look for CPU time in Wiktionary, our sister dictionary project.
		Look for CPU time in the Commons, our repository for free images, music, sound, and video.
		If you have created this page in the past few minutes and it has not yet appeared, it may not be visible due to a delay in updating the database.
	en.wikipedia.org /wiki/CPU_time (103 words)

	Cpu time estimation for a single orbit
		The time estimate is then the sum of the times for each of the components.
		Scaling by the times for glast (185 sec) and glast02 (708 sec) from the previous estimate gives an approximation for the time on the linux machines: ~1450 cpu weeks component-wise, ~1340 cpu weeks from CrTotal, ~2600 cpu weeks from CrTotal at second number 99.
		I ran test_Gleam (v5r3p2) to estimate the cpu time required to generate and reconstruct the events for 1 day (~16 orbits).
	d0.phys.washington.edu /~hierath/orbit.html (622 words)

	Data Compression - CPU Time May GO DOWN - By Joe Geller
		The conventional wisdom is that the tradeoff is an increase in CPU time.
		Further analysis indicated that the CPU time could be broken down to 7 secs for processing the rows, 26 secs for the getpages and I/O against the original (and 5 secs for the compressed) and 52 secs for the row expansion.
		So, a 52 second increase in CPU time (worst case) for a query that originally ran in 52 minutes, is not bad.
	members.aol.com /joeDB2/db2comp.html (745 words)

	Operating System Structures (Site not responding. Last check: 2007-10-16)
		CPU burst distribution shows that most processes have similarly short burst times.
		After this time has elapsed, the process is preempted and added to the end of the ready queue.
		If there are n processes in the ready queue and the time quantum is q, then each process gets 1/n of the CPU time in chunks of at most q time units at once.
	faculty.berea.edu /pearcej/CSC325/ch5.htm (820 words)

	How can I check the CPU time consumed by my current jobs? (Site not responding. Last check: 2007-10-16)
		Where, chk_cpu initiates a job on the batch server and returns with the CPU time information for your job(s) in a file called "chk_cpu.o.e".
		The CPU time is reported as hh:mm:ss (hours:minutes:seconds).
		Where 273:01 is the CPU time for the SAS job driver50.sas and 274:46 is the CPU time for the SAS job driver25.sas.
	www.asu.edu /it/fyi/dst/helpdocs/lsf/cpu_time.html (170 words)

	HogWatch (V00390)
		A hog is defined as a process whose total CPU time for the last fifteen passes is greater than the CPU time limit.
		CPU time is not cumulative for interactive processes.
		The total CPU time is used for these and when the limit is exceeded, the priority is lowered to a value one less than the value used for other processes.
	www.decus.org /libcatalog/description_html/v00390.html (286 words)

	CPU Time - SpeedUpMyPC Terms Explained
		Answer: CPU time is the amount of time the CPU spends on a specific task.
		If you have Windows 2000 or Windows XP, you can find out how much time the CPU spends on a task by opening the Windows Task Manager and enabling the CPU time column in the process view.
		CPU time and CPU usage are often used interchangeably, although CPU time is in fact an accumulated measure of CPU usage.
	www.liutilities.com /products/speedupmypc/speedupterms/cputime (277 words)

	[ENBD] ENBD and CPU-Time/Performace, Stability
		When this kind of thing happens, it is usually because a person is not working with the kernel he thinks he is. Look at the build date from "uname -a" and compare it with the actual age of the image you think you are using (got with ls -l).
		First of all, with one daemon running and one cpu only, nbd MUST maintain request ordering from the kernel.
		It is possible with more than one daemon or more than one CPU to get out-of-order replies from the driver.
	lists.community.tummy.com /pipermail/enbd/2001/000637.html (549 words)

	Mainframeforum - CPU TIME and RUNTIME (Site not responding. Last check: 2007-10-16)
		Could you please let me know how i can find out the true run time of the job taking into account the CPU time and the time it took to do the I/Os..
		All you normally have is the CPU Time and the Wall-Clock time.
		The CPU time only tells you how long the program was using the processor.
	www.mainframeforum.com /showthread.php?goto=lastpost&threadid=610536 (184 words)

	Reclaiming CPU-time During MPI Communications
		Furthermore, they can possibly reclaim a large amount of the wasted time when they consume a significant portion of a program's run-time.
		The library is used with an existing neural network simulator, chosen for its significant consumption of random numbers.
		Timing and memory data are collected on the neural network simulator with and without the use of the library.
	www.cs.virginia.edu /colloquia/event333.html (197 words)

	MaxCpuTime (Site not responding. Last check: 2007-10-16)
		This parameter indicates the maximal CPU time that may be used by the optimization process.
		In this case, the real CPU time can exceed this value since we check the used CPU time only in the main loop of the cutting plane algorithm.
		, which kills the process if the maximal CPU time is exceeded, whereas our CPU time control ``softly'' terminates the run, i.e., the branch-and-bound tree is cleaned, all relevant destructors are called, and the final output is generated.
	web.bilkent.edu.tr /Online/abacus/node190.html (155 words)

	The Oracle (tm) Users' Co-operative FAQ - time unit (Site not responding. Last check: 2007-10-16)
		In late versions of Oracle 8.1, Oracle started recording time in v$session_wait, v$session_event, and v$system_event (or at least the underlying X$ objects) in micro seconds.
		However, the micro second time is not always exposed - some views have a column time_waited_micro, some only have the time_waited where the value is rounded to the hundredth.
		This does lead to some oddities in trace files, where you may find the elapsed time of an action recorded to the micro second, but the corresponding CPU time rounded to the hundredth, with the effect that the CPU time will sometimes be much larger than the elapsed time.
	www.jlcomp.demon.co.uk /faq/time_unit.html (252 words)

	How-To read Pentium CPU Time-Stamp Counter
		For example, two hundred million cycles on a 200 MHz processor is equivalent to one second of real time, while the same number of cycles on a 400 MHz processor is only one-half second of real time.
		Delphi 2 and 3 does not have a native Int64 data type support, the code below uses Comp data type which has 8 bytes in size but it is not a integer but floating-point type.
		Average overhead: 88 CPU cycles, which is almost twice faster.
	www.geocities.com /izenkov/howto-rdtsc.htm (391 words)

	CPU time applications
		Small and medium-sized CPU time applications (200-10000 billing units) should be sent by e-mail to User Manager at usermgr@csc.fi.
		You also have to fill in the CPU time application form if your cumulative project usage exceeds 20000 bu per calendar year.
		It is advisable to apply for more CPU time well before the current resources are used up.
	www.csc.fi /hakemukset/laskentaresurssit/index.phtml.en (777 words)

	Leader in total cpu time (Site not responding. Last check: 2007-10-16)
		Congratulations to Ohio University for becoming the top user in total cpu time.
		We noticed that our total CPU time for Ohio University is about to move onto the top of the list and we thought we should provide some information as to how we have achieved that total.
		Since we are the group of people that prepares and installs all of the software on the hard drives for those computers, as well as going in to each and every room over the summer to clean and prepare the computers for the next year, we began pre-installing the Seti@Home client on all of them.
	setiathome2.ssl.berkeley.edu /ohio_u.html (562 words)

	dBforums - Measure "CPU time usage" hardware independent ?
		that the CPU time is smaller than wall clock.
		And in any case, the real amount of time a function takes is rarely of interest.
		is interesting is the relative time, and for that you need to use a profiler, which
	www.dbforums.com /t326205.html (2570 words)

	% CPU Time
		Data item that represents the percentage of time, instance-wide, spent executing instructions by the CPU during this sample period.
		If the % CPU Time is greater than or equal to the threshold values specified by the threshold arguments, and the number of occurrences exceeds the value specified in the "Number of Occurrences" parameter, then a warning or critical alert is generated.
		When CPU is the largest contributor to total response time, it must be broken down to properly understand the problem further.
	www.df.lth.se /~egh/doc/EM/Webhelp/dba/DBA_C0E1.HTML (260 words)

	[Fwd: Lazy-lock and gnuclients use a lot of cpu time.] (Site not responding. Last check: 2007-10-16)
		Date: Fri, 10 Aug 2001 15:29:27 -0500 From: Paul Cheng To: ben@xemacs.org Hi Mr Wing, I noticed that in xemacs-21.4.4, using a combination of gnuserv, gnuclient and lazy lock causes xemacs to use a lot of cpu time.
		If I turn off lazy-lock, then the cpu time remains at about 0.8% no matter how many gnuclients I use.
		Since the increase in cpu time is so huge when both lazy-lock and gnuclients are used together, I am just wondering if this is a bug.
	list-archive.xemacs.org /xemacs-beta/200108/msg00142.html (309 words)

	Cpu time limit (Site not responding. Last check: 2007-10-16)
		Each account is set up with a default limit for the maximum amount of processor time a task may use.
		You can change the default cpu limit for your account by adding a line like "cpulimit 3600" to the end of your.login and.cshrc files.
		To avoid the possibility of running out of cpu time while editing, most accounts have an alias specified for vi which temporarily unlimits cpu time during visual editing sessions.
	www-acs.ucsd.edu /info/cputime.php (466 words)

	How to Set Interactive CPU Time Limits on the CRAYs (Site not responding. Last check: 2007-10-16)
		The UNICOS "control" command has a number of different functions, one of which is to set a CPU time limit on the execution of a single command.
		This is ideal for running programs which, for whatever reason, might have a tendency to "run away" and possibly exhaust a bank account.
		The default for this limit is 1200 seconds (twenty minutes), but you can set it as you choose using the "cpulim" command.
	fusion.gat.com /docview/time_limit.html (226 words)

	get_cpu_time/1 (Site not responding. Last check: 2007-10-16)
		This built-in predicate determines the time since the program was started in milliseconds.
		It can be used to calculate the elapsed time between two events.
		The variable T is assigned the number of milliseconds since the start of the program, for instance T can be assigned the value 3916734
	www.trinc-prolog.com /doc/pl_p143.htm (57 words)

	Subroutine cpu_second (Site not responding. Last check: 2007-10-16)
		Although Fortran 90 standardized an intrinsic function for wall clock time, it does not include a function for CPU time.
		At the time of this writing, it is anticipated that a CPU time intrinsic function will be added to the language in Fortran 95.
		The value returned in cpu (and user and sys where available) should be a nonnegative real number such that the difference between two successive calls is the amount of elapsed CPU time in seconds.
	math.nist.gov /StopWatch/doc/user_guide/node12.html (362 words)

	Info Node: (libc.info)CPU Time (Site not responding. Last check: 2007-10-16)
		In typical usage, you call the `clock' function at the beginning and end of the interval you want to time, subtract the values, and then divide by `CLOCKS_PER_SEC' (the number of clock ticks per second) to get processor time, like this: #include clock_t start, end; double cpu_time_used; start = clock();...
		Different computers and operating systems vary wildly in how they keep track of CPU time.
		If the CPU time is not available or cannot be represented, `clock' returns the value `(clock_t)(-1)'.
	casper.ict.hen.nl /cgi-bin/info2www?(libc)CPU%20Time (254 words)

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