latency checker

In-depth analysis of network latency during Android boot In general, the property of phone is persistent to true, and the phone process is called up earlier. Applications modified by android: presistent will be started by AM after the system is started, even if they are not running, AM also calls startProcessLocked to start the process. Start package com. android. phone, that is, phone application. This will directly call onCreate () of PhoneApp and e

reuse of data. Reusing data while it is still in the cache avoids sustaining memory fetch stils and generally CES the memory bus load. Memory latency The times it takes to initiate a memory fetch is referred to as memory latency. During this time, the CPU is stalled. The latency penalty is on the order of 100 clock cycles. Caches were authorized Ted to hide suc

When FFMPEG was recently used for h264 encoding, it was found that the video encoding was delayed, rather than real-time Encoding. After some research, we found thatAvcodec_open2Function When encoder is enabled, SetAvdictionaryThe key code is as follows: Avcodec_open2 function: int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); Solution: Avdictionary * Param = NULL; // h264, set to encode latency to encode imm

First,description of problem phenomenaAfter successful installation of a Dell Server Rhel 6.8 System, the user reflects a high latency when logging in to the server via SSH, and can delay up to 6-7s or even direct error.Connecting to 10.0.0.10:22 ...Connection established.To escape to local shell, press ' ctrl+alt+] '.Information to display when connectingLast Login:thu Jul 7 16:24:56 from 10.0.0.10Wait a long time before showing successful connection

Pt-heartbeat Database master from replication, replication status, data latency is a very important indicator of the normal, then how to monitor it? Pt-heartbeat is a tool set developed by Percona to monitor the replication latency of MySQL and PostgreSQL. More mature, such as Uber and other large companies are in use. Monitoring principle Build a heartbeat table in master, which has a timestamp field

Tags: style http color os IO strong AR for 2014Slave latency monitoring in MySQL replicationHttp://imysql.com/2014/08/30/mysql-faq-howto-monitor-slave-lag.shtmlIn a MySQL replication environment, we usually only judge the latency of the slave based on the value of the seconds_behind_master . This is acceptable in most cases, but is not accurate enough and should be considered for more factors.First, let's l

WPF development diary-solves the latency of dragging behavior appended to the element, wpf drag The premise of this article is to use ItemsControl to dynamically add the most MVVM control to the Canvas. In the previous blog, I used ItemsControls to set Canvs as the layout panel. Set Canvs. Left and Canvas. Top in ItemContainerStyle. In MVVM mode. The next step is to show the drag of the content. I am sorry to tell you that after two days of explorati

How do I set a latency log application for a physical volume uard? Note that if real-time Apply is enabled, the DELAY parameter is ignored. To set the Apply DELAY, you must use "DELAY =" on the log_archive_dest_n parameter ", for example, DELAY = 360 (in minutes) indicates a DELAY of 360 minutes (6 hours ). For example: SQL> alter system set log_archive_dest_2 = 'service = standby LGWR SYNC affrem DELAY = 360VALID_FOR = (ONLINE_LOGFILES, PRIMARY_ROLE)

; select count (*) from user_extents where segment_name = 'tbl _ seg '; COUNT (*) ---------- 1 We can see that the segments and zones have been allocated space. The user_segments and user_extents tables have records corresponding to TBL_SEG. 3. Disable delay segments: You can disable delay segments. whether to use the delay segments is defined by the DEFERRED_SEGMENT_CREATION parameter. This parameter can be modified at the session level. If you want to completely delete the delay segments,

Generally, the master/slave Mechanism Based on LAN can meet the requirements of 'realtime' backup. If the latency is high, first confirm the following factors:1. network latency2. master Load3. slave LoadThe general practice is to use multiple slave instances to allocate read requests, and then retrieve a dedicated server from these slave instances for backup purposes only, without any other operations, it can meet the 'realtime' requirement to the ma

Many times, oracle only knows the constraints to restrict some data to complete the business logic. However, it is found that there are also application latency constraints. the scenario is as follows: the inventory table uses the product ID as the unique identifier, but at a certain time point, that is, after the product of a specific ID is sold out, it then enters the product (the processing of business logic ), that is, two identical product IDs ma

Explanation: High-Precision latency is the basis of CPU speed measurement. in windows, there is a very high-precision timer with the precision in microseconds. However, the timer frequency varies with different systems, this frequency may be related to both hardware and operating systems. You can use the API function queryperformancefrequency to obtain the timer frequency. You can use the API function queryperformancecounter to obtain the current valu

I recently wrote something that uses the latency function. Sort it out: Code 1 private declare sub sleep lib "Kernel32" (byval dwmilliseconds as long) Code 2 Private declare function timegettime lib "winmm. DLL "() as longfunction delaytime (milliseconds as integer) dim savetime as double savetime = timegettime 'write down the start time while timegettime The above three codes can be delayed. The disadvantage of code 1 is that after the delay is long,

Generally, the master/slave Mechanism Based on LAN can meet the requirements of 'realtime' backup. If the latency is high, first confirm the following factors: 1. network latency2. master Load3. slave LoadThe general practice is to use multiple slave instances to allocate read requests, and then retrieve a dedicated server from these slave instances for backup purposes only, without any other operations, it can meet the 'realtime' requirement to the m

This article mainly introduces the usage of PHPStatic delayed Static binding, and analyzes the Static delayed Static binding functions, definitions, and usage skills in combination with the instance form, for more information about Static binding with PHP Static latency, see the example in this article. We will share this with you for your reference. The details are as follows: After PHP5.3, static binding with l