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Questions tagged [qos]

Quality-Of-Service (QoS) is the management of system resources, network or otherwise, to apply greater returns with minimal overhead, providing a measurable increase in performance.^1 ^2 ^3

Application QoS is related to thread management or Interprocess Communication (IPC) management as it relates to hardware and software resource access.

"In the field of computer networking and other packet-switched telecommunication networks, quality of service refers to traffic prioritization and resource reservation control mechanisms rather than the achieved service quality. Quality of service is the ability to provide different priorities to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow."

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Why am I receiving 50 code from QOSStartTrackingClient method?

I am receiving error code 50 from the code below, which means ERROR_NOT_SUPPORTED. I use the QOSStartTrackingClient method from this winapi document. But it does not say when do I receive this result. SOCKADDR_IN sin { AF_INET }; …
Matin Lotfaliee
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MQTT publish hangs after 1 hour - QOS-0, Limited resources, Java Paho Client

I am using simple MQTT client for publish and subscribe using Paho client java. I have limited resources of around 256MB or less of RAM (Linux machine with reduced capabilities). My QOS level is 0. My connection to mqtt broker is successful. I am…
DTCool
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QoS in OpenWRT dependant on two IP's

I'm trying to develop a QoS system which controls two IP's. Using OpenWRT based router firmware, I have tried using TC and am having issues with incompatibility. Is there another package or set of packages which are available to achieve…
Ballard
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IPV6 connection to IPV4 TOS option

could you help me? So problem is QOS On IPV6 socket when it connect to IPV4 server I can't set transport options on package self.socket = socket(PF_INET6, SOCK_DGRAM, 0); // Create UDP Socket int on = 1; setsockopt(self.socket, SOL_SOCKET,…
Vladyslav
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UDP sendmsg IP_TOS, setting QoS class on Linux atomic? (lock/signal bug)

Scenario: Two threads sending UDP on the same socket, and thread 1 wants to set different diffserv/QoS class than thread 2. We have solved this previously by wrapping sendto() calls in a mutex, and doing setsockopt() of appropriate QoS class before…
Erik Alapää
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CloudSim: need way to introduce performance degradation in VMs at certain simulation time

In Cloudsim, I need to introduce SLA violation at a particular time of the simulation e.g. from 600 to 1200 and from 2400 to 4000 (just an example). Such SLA violation needs to show a shortfall of mips from 600-1200 and 2400-4000 simulation times so…
Minhaz Chowdhury
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Priorities the traffic using TC

I would like to Traffic Control TC to priorities the traffic. For example I need the TCP goes via band0, UDP goes via band1, and other traffic goes via band3. I create the qdisc as follows: tc qdisc add dev eth0 root handle 1: prio tc qdisc add dev…
Anees
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How can I specify Quality Of Service in ESB 4.9.0?

I'm trying the new 4.9.0 ESB version, having some experience in using 4.8.1 version. I used to specify my own security policy using the Quality Of Service area in custom proxy configuration, but in the latest version that area is empty - without…
mail contatti
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Can we set non recommended values like 61 as DSCP value for QoS (Quality of services)

I am wondering if we can set/mark a packet header with non-recommended DSCP value. With Wireshark I can see that packet is marked "Unknown DSCP". So my question is "is it necessary to set the recommended value of DSCP always ? For Example. If I am…
user2809888
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mosquitto bridge resend message at reconnect

Im publishing mqtt messages from machine1 to machine2 through a bridge. On machine1 Im running mosquitto broker and on machine2 Im using rabbitmq mqtt plugin. Im trying to hold messages in case of network disconnection. When it connects again it…
bbox
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Windows 7: Launching an application silently with admin privileges under default user account?

How can you ensure that an executable is silently launched with admin (or sufficiently elevated) privileges when that executable is launched by a user who is logged into a Windows account which has default user privileges (i.e., not an admin…
user1884325
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Is it possible or even allowed to implement QoS on server and client? Live555

I have been looking at RTSP of Live555 and seems they are following RTSP as per definition form IETF. So far they seem to have reporting for transmission (data sent) on the server end, and reception (data received ) client end. I am wondering is it…
Wajih
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How to measure QoS parameters in the ns-3 simulation

I would like to simulate voip in a wimax network. What I would like to measure are the QoS parameters such as IPTD, IPDV and IPLR. I am new to the ns-3 simulator and I can't find anything about QoS measurment. I've already searched in google and it…
fragon
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What is a valid TC (QoS) u32 filter handle id

I'm trying to find a way of using some kind of naming convention to distribute unique id's among my app modules. I want each up to have a range of id's it can use to create TC filters / classes etc.. As it this page states : A u32 handle is…
SagiLow
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DSCP Precedence

How can I use Java to obtain the Precedence part of a DiffServe Code Point (DSCP) integer? I expect it involves bit shifting, but for some reason I cannot seem to obtain the values I would have expected.
robross0606
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