Download Shareware and Freeware Software for Windows, Linux, Macintosh, PDA

line Home  |  About Us  |  Link To Us  |  FAQ  |  Contact

Serving Software Downloads in 976 Categories, Downloaded 30.142.057 Times

LatencyMon 2.01 B201.31120

Company: Resplendence Software Projects Sp.
Date Added: October 25, 2012  |  Visits: 264

LatencyMon 2.01
Full screenshot

Report Broken Link
Printer Friendly Version


Product Homepage
Download (44 downloads)

LatencyMon checks if a system running Windows is suitable for processing real time audio by measuring DPC and ISR excecution times as well as hard pagefaults. It will provide a comprehensible report and find the kernel modules and processes responsible for causing audio latencies which result in drop outs. It also provides the functionality of an ISR monitor, DPC monitor and a hard pagefault monitor.

LatencyMon will display the execution time of each ISR, DPC routine and hard pagefault and will resolve them to the drivers and processes responsible for executing them. It will create a comprehensible report but it will also represent all sampled data in a detailed manner allowing you to perform in-depth analysis.

Windows is not a real time operating system. All requests to the operating system are delivered on a best effort basis. There are no guarantees whatsoever that requests are delivered within a certain time frame, which are the characteristics of a real-time operating system. That is not a problem for most devices and tasks but this is bad news for audio applications (which are considered soft real-time) because they need to deliver data to the subsystem and the hardware in buffers several times per second. If one or more buffers miss their deadlines and are not delivered in time it has audible consequences which are recognized as dropouts, clicks and pops.

The Windows thread disptacher (also known as scheduler) which is part of the kernel executes threads based on a priority scheme. Threads with higher priority will be given a longer execution time (also known as quantum or time slice) than threads with a lower priority. However the kernel also knows other types of units of execution known as interrupt service routines (ISRs). Devices connected to the system may interrupt on a connected CPU and cause their interrupt service routines to execute. An interrupt can occur on the same processor that an audio program is running on. Any thread that was running on the processor on which an interrupt occured will be temporarily halted regardless of its priority. The interrupt service routine (ISR) is executed and may schedule a DPC (Deferred Procedure Call) to offload an amount of work. The DPC will most likely run immediately on the same processor which means the audio application will halt until both the ISR and the DPC routines have finished execution. That is because ISRs and DPCs run at elevated IRQL which means they cannot become preempted by the thread dispatcher (scheduler). Therefore to guarantee responsiveness of the system, ISR and DPC routines should execute as fast as possible. Guidelines say that they should not spend more than 100 ?s of execution time however this is often not reached due to hardware factors beyond the control of the driver developer. If execution time gets too high, the audio program may be unable to deliver audio buffers to the hardware in a timely manner.

Windows uses a concept of virtual memory which relies on the page translation system provided by the CPU. Whenever a memory address is requested which is not available in physical memory (not resident), an INT 14 will occur. The OS provided INT 14 handler will decide how to proceed next. If the page in which the address resides is known to Windows but not resident, Windows will read in the required page from the page file. That is known as a hard pagefault and can take a lot of time to complete. If the page can be read in from the hard disk cache, the price will be limited. However if it needs to physically read in the data from disk sectors this takes a lot of time. If an audio program hits a hard pagefault while it is playing it will almost certainly have audible consequences recognized as dropouts, clicks or pops.

Requirements: No special requirements
Release Date: October 25, 2012
Platforms: WinXP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64
Keyword: Audio Dropout Dpc Dpc Measurement Isr Excecution Time Measure Measurement
Users rating: 0/10

License: Freeware
LATENCYMON 2.01 RELATED
Home & Leisure  -  LatencyMon 2.03 Build 203.
The LatencyMon application was developed to be a small tool that lets you find the root cause of audio dropouts, clicks and pops. LatencyMon checks if a system is suitable for processing real time audio by measuring DPC and ISR excecution times as...
 
Development Tools  -  Nuclear Medicine Calculator 1.0
It is a GUI that calculates the activity of a certain isotope before or after the measurement date and time. It has an extensive list of isotopes used in nuclear medicine.
10 KB  
Mathematics  -  Mac the Scope for Mac OS 4.28
Includes a real-time and audio file based vector trace FFT analyzer, time domain oscilloscope with triggering, precision swept sine analyzer, precision multi-waveform signal generator, including ultra-flat pink noise; 1/3 octave RTA featuring...
3 MB  
Multimedia & Graphics  -  RateXCalc 0.1
RateXCalc is a little tool to get cross-calculations between video/audio rates of an arbitrary stream and time/media size.
20.48 KB  
Reference  -  EcoData: Radiation DE 1.0.1
"EcoData: Radiation DE" displays radioactivity levels of monitoring stations from all over Germany in near real time. Select real time radiation measurement stations of interest from a map, browse station lists, explore the stations by distance,...
8.4 MB  
Multimedia & Graphics  -  Octave Shifter 2 2.0
Octave Shifter 2 is a free real-time pitch shifting audio effect for Apple's Audio Unit architecture. By leveraging existing technologies like CoreAudio, Altivec and SSE, Octave Shifter 2 offers a unique audio experience. Key features of the...
389.12 KB  
Science  -  Units of measurement for Ada 2.4
Units of measurement for Ada library provides an implementation of dimensioned values for Ada. Unit checks are made at run-time, if not optimized out by the compiler. SI and irregular measurement units are supported. Shifted units like degrees...
788.48 KB  
Multimedia & Graphics  -  KLONK Image Measurement 11.2.4375.16633
KLONK Image Measurement is the little brother of KLONK Quantify Image Central, which is a state of art Scientific full featured database multiuser Image Measurement system. KLONK Image Measurement is a tool that can be used for measuring areas...
 
Web Cam Tools  -  Dwyco VideoChat Community 2.15
* It's FREE, no malware, spyware, or mysterware. * Works on Windows (XP, Vista, 7, 8, 10), MacOS (10.7+), Linux (Ubuntu 14.04+) * Create your own private lobbies. * Directory lets you see who has recently visited CDC-X, and lets you see who is...
10.46 MB  
Backup Utilities  -  BootRacer 4.7.1.372
BootRacer Tests How Fast is your Computer! Test boot time of your pc with this free tool! BootRacer automatically tests how long Windows takes to start and saves it in a history database. You can analyze it to compare boot times, before and...
4.45 MB  
NEW DOWNLOADS IN WINDOWS SOFTWARE, UTILITIES
Windows Software  -  Movie Box App 3.3.8
Movie Box is Best Application for watching movie, TV shows , Music video, here you to give us clear step by step guide how to download and install Moive Box for Android , all user can free download Movie Box and most user friendly apps. All PC or...
67.23 KB  
Windows Software  -  Cydia Download 1.1.10
This is one of the best freeware released for users. What is Cydia Download ? This is simple downloader which has developed for install Cydia for your device less than ten minutes of time. This freeware is important for all jailbreak users. You...
67.23 KB  
Windows Software  -  Jihosoft iOS10 Backup Extractor 7.0.7
What can you do to extract and recover your iPhone data if you get them lost for the following reasons: 1.Deleted important data from iPhone by mistake. 2.iPhone is damaged, lost or stolen. 3.iPhone stuck in black/white screen of death, iPhone...
16.5 MB  
Windows Software  -  Screenshot Captor 4.15.0
Screenshot Captor is designed for grabbing lots of screenshots with minimal intervention. It has great multimon suport and includes a full image explorer with full shell functionality and unsurpassed integration with external tools like graphic...
7.15 MB  
Windows Software  -  MonitorPack Guard 5.4.1
MonitorPack provides Windows tools at no cost for server monitoring, IT asset management and help Desk solution, optional Cloud Solution (IaaS or Infrastructure as a Service) Cloud Application (Platform as a Service) and software on demand (SaaS...
11.01 MB  
Utilities  -  Foxit Reader 9.0.0.29935
New Features in Foxit Reader 9.0 • Better accessibility Use single key accelerators to access commands or perform some actions, improving the application accessibility to make the reading and working with PDF files more accessible....
51 MB  
Utilities  -  AOMEI PE Builder 2.0
AOMEI PE Builder, a more convenient and complete WinPE-based bootable media creator for Windows 10, Windows 8.1/8, Windows 7, Vista, XP, Windows Server 2003, Windows Server 2008 (R2), Windows Server 2012 (R2) and Windows Server 2016. It integrates...
146.84 MB  
Utilities  -  Free Format Recovery Software 6.0.0
Free Format Data Recovery software download for Windows to recover data after format device or device shows raw file system inaccessible not recognized with all kinds of digital devices supported lik hdd, usb flash drive, memory card. Undo quick...
4.08 MB  
Utilities  -  WinExt Free 2.0
WinExt is a FREE utilities kit for Windows. You can enjoy the following features by using it: 1. Quickly find the duplicate files on your drives relied on file contents. Key features: comparing file contents, 100% accurate result. High-speed...
668 KB  
Utilities  -  AKick Data Recovery 1.3
AKick Data Recovery is a software that efficiently recovers deleted data files on storage devices, system drives and memory cards. The software is compatible with all Windows versions including Windows 10 and supports all storage devices for data...
2.65 MB