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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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Mikrotik - Limit Upload Speed On Specific Port

I have set a NAT Rule for chain=dstnat action=dst-nat port=1234 and is working ok, I can access application from internet to my local pc, now i want to limit this port=1234 on upload speed but i cant do it! On Simple Queues there is option but to…
RednBlack
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QoS don't work with more than two instances

The QoS by Microsoft have a limitation for how many connections that can work? I'm using the sample of Microsoft on github What I'm doing here it's to compile. Run the program sending packets to any computer on my network with some bitrate. The…
Kevin Kouketsu
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Does QOS based DispatchSemaphore blocks the entire thread pool

let semaphore = DispatchSemaphore(value: 1) DispatchQueue.global(qos: .background) Does this mean if i use this semaphore to make a specific block of resource to be accessed by only one thread at a time, it will block the entire threads running in…
Gowtham Ravi
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SAPUI5 Enterprise Messaging: x-qos is invalid

I'm sending a message via enterprise messaging in SAP from Fiori. SAPui5 code as below. $.ajax({ type: "POST", url: '/messagingrest/v1/topics/SeasonalityTopic/messages', …
Dumi
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WSAIoctl function to control the packets send speed of a UDP socket

Could I use the WSAIoctl() function provided by the Windows SDK to control the packets send speed of a UDP socket? I need to control the packets sending speed of an UDP socket at the accuracy of 400KB/S. I am running program at Windows 7 System. I…
Erwin Smith
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iOS - How to understand and properly debug this type of crash : com.apple.root.background-qos?

I know this question has been already asked several times, but either it stayed unanswered or the answer was totally not helping. Here is my crash report : This question and especially the comments helped me understand (kind of) my issue. It seems…
user7219266
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how to manage life cycle of topic instances manually while using qos configuration file

I use DDS Opensplice community version 6.7. At the moment when I create a topic, I use QoS xml configuration file. The QoS config file sets settings such as liveliness and resource_limits for a topic. I know that if you don't use QoS config file,…
Jia Liang Liu
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How to guarantee any DispatchQueue (or OperationQueue) to run only in non-main thread for asynchronous tasks?

So far, I couldn't find any mention about this feature. AFAIK, by definition, any GCD queue can run in main thread. If a GCDQ with some heavy task selects main thread to execute on, it'll affect something bad to UI. (I am talking about…
eonil
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tc qdisc with GRE in openwrt

I'm trying to implement traffic control to GRE interface in an openwrt board. For this i followed below steps, Create GRE interface named gre1 in both tunnel end devices. Tested reachability with ping, Success. create qdisc using following…
Shihab Pullissery
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When I try to publish Message use MQTT (QOS=2) can't receive message

I am new guy in use MQTT, when I publish message use qos=1 I could recevice message correct.but when I try to publish message use qos=2 I got nothing.this was my test code ,I try use rabbit mq (MQTT) Subscribe: def MQTT_CONNECTION(): print("IN…
james
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What is QoS in the context of Ethereum

I often see this line in my go-ethereum output. Recalculated downloader QoS values rtt=5.329575339s confidence=0.923 ttl=17.32992345s What does QoS stand for and what is its purpose in Ethereum?
mitchkman
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Can't add Policy based QoS through Registry

Im trying to "automate" the process of adding few policy based QoS in windows 7 at once. When im entering "gpedit.msc" and creating a new policy, it ultimately creates a Registry key. I tried to export those keys and running the .reg file in another…
Hgt
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Which TCP/IP layer provides QoS?

Which layer in TCP/IP model provides Quality of Service (QoS)? I am confused between Layer 2 and Layer 3?
sasuke_X220
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What is the reason for PUBACK retransmission when QoS level 1 is set in MQTT?

A student studying MQTT. To test the MQTT, the broker used mosquitto, the publisher and subscriber used the paho library. From publishers to brokers, the experiment of sending a message with a payload size of 1000 bytes continuously We have…
김성진
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example of QOS_DIFFSERV usage

I receive an error when I use this QOS_DIFFSERV. I read about the way it is used in here. I am wondered if I have written this code correctly? auto diffClass = (QOS_DIFFSERV*)pointer; diffClass->ObjectHdr.ObjectType = QOS_OBJECT_DIFFSERV; …
Matin Lotfaliee
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