latency checker

Tags: H.264 thread buffer parallel The latency of x264 encoding is studied. The method is to add log in x264.c Static int encode (x264_param_t * Param, cli_opt_t * OPT) { ... I _frame_size = encode_frame (H, opt-> Hout, pic, last_dts ); If (I _frame_size = 0) // delay Frames Fprintf (stderr, "output zero % d \ n", I _frame ); ... } After statistics, we found that the number of x264 encoded delayed frames conforms to the following formula. H-> frame

This is a BDP test in rhca, which is also a very common simulation of latency and packet loss. I will share it with you now. We also use the application software to test TCP/UDP comparison. When we test the impact of BDP on TCP/IP, we all need some network latency and packet loss simulation, many commercial software can do this. In fact, the perfect Linux itself can use TC to implement this function. the ne

We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table on the master database using timestamps, then, read the updated timestamp from the database and compare it with the local system time to monitor the # code/5799.html "target =" _ blank "> master/slave replication latency of the MySQL database, we can use

We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table on the master database using timestamps, then read the updated timestamp from the database and compare it with the local system time to monitor the https://www.php1.cn/code/5799.html "target =" _ blank "> MySQL database master/slave replication latency,

PHPStatic latency static binding usage analysis, static. PHPStatic latency static binding usage analysis. static this article describes PHPStatic latency static binding usage. For your reference, see PHP5.3 and later introduction of PHP Static latency static binding usage analysis. This article describes the usage of

Original: http://www.javaranger.com/archives/1264With respect to throughput (throughput) and latency (latency), if you want to perform performance optimizations, these two concepts must be known, and they seem simple but not. Many people have thought that high throughput means low latency, and high latency means less t

Tags: blog HTTP ar SP Div on 2014 art log Taking the official Third Person template as an example, the uspringarmcomponent in the character blueprint implements most of the camera and scene collision and interaction functions. To implement camera latency, you only need to modify the attributes in the lag column. The first one controls the latency when the camera moves, the second is the

Basic tutorial on solving the Slave latency problem in MySQL, mysqlslave I. Cause AnalysisGenerally, slave has a large latency compared to the master. The root cause is that the replication thread on the slave cannot truly achieve concurrency. Simply put, on the master node, the transaction is committed in the concurrency mode (mainly based on the InnoDB engine), while on the slave, the replication thread

Tags: Unreal Engine character Taking the official Third Person template as an example, the uspringarmcomponent in the character blueprint implements most of the functions such as camera and scene collision and interaction. To implement camera latency, you only need to modify the attributes in the lag column. The first one controls the latency when the camera moves, the second is the

CPU speed (MHz) and high precision latency (microsecond) (Browsing 20979 times) Victor Chen, (C ++ fans) I. High-Precision latency is the basis of CPU speed measurementWindows has a very high-precision timer in microseconds, but different systems have different timer frequencies, which may be related to hardware and operating systems. You can use the API function queryperformancefrequency to obtain the ti

Resisting network interference is a major problem that needs to be solved in our network. Here we will explain how to solve the latency problem in detail. The latency of all 802.11 Wireless Networks in the city is complex. The city's security department plans to convert thousands of repeated passwords into more powerful, two-factor authentication methods. Why? The city's security architects said they had cr

When I entered Pinterest, my first three weeks were spent in this part, where the latest projects applied the results of production problems to the entire software stack. In this part, we learn how Pinterest is built by building Pinterest, and it's not uncommon to submit code and make meaningful contributions in just a few days. In Pinterest, new engineers have the flexibility to choose which group to join, and as part of their work experience in this part, writing different parts of the code ca

1. Now, the business logic is to update a piece of data to 2, and then count the data with the status of 2. Due to the master-slave latency of MySQL, data is sometimes accurate and sometimes inaccurate. 2. Data Update and statistical data are logically the same and cannot be separated. For example, if I just saved the money and changed the status of the data table field to 2... 1. Now the business logic is to update a piece of data to 2 and then count

Application of C + + in low-latency trading systemIn the financial derivatives markets, market makers shoulder the obligation to quote for options Futures products (quoting)."Low latency" is crucial for such companies, and if you are faster than others, the same offer can be prioritized, the wrong offer can be withdrawn quickly, and the wrong pricing on the market can be arbitrage. Obviously, manual order i

The reliability, delay and consistency of the distributed system are general problems, not limited to the database, and Cassandra provides a good solution to the problem.Cassandra claims to be able to achieve the efficient access to database access across data centers, and it is implemented in a way that gives users the tradeoff between latency, throughput, and consistency. Cassandra provides two levels of access: Local_quorum and Each_quorum, where

MySQL latency Association Performance Optimization Method This article mainly introduces the MySQL latency Association performance optimization method. This article describes the background of latency Association, latency association analysis, and solution of latency Associa

Author: those things |ArticleCan be reproduced. Please mark the original source and author information in the form of a hyperlink Web: http://www.cnblogs.com/panfeng412/archive/2012/03/26/real-time-computing-engine-processing-delay-troubleshoot.html Recommendation: Debug hacks When processing real-time data, the real-time computing engine must ensure that new data is processed in a timely manner. For example, if there is a log file every minute for the website access log data, the real-tim

Memory latency is the delay that is caused by waiting for access to stored data in the system's memory to complete. The fundamental problem is that the processor (such as the intel® xeon® processor) has a frequency of nearly 4 GHz, while the memory chip rate is only a MHz (such as DDR 3200 memory)-The clock speed ratio is 10:1. Therefore, when the processor needs data items that are outside the memory cache, each cycle must wait 10 cycles for the memo

Welcome to the Linux community forum and interact with 2 million technical staff. 1. MySQL database master-slave synchronization delay principle. To talk about the delay principle, we must start with the mysql database master-slave replication principle. mysql master-slave replication is a single-threaded operation. The master database generates binlog for all DDL and DML data, and the binlog is sequential write, so the efficiency is very high, slave Sla Welcome to the Linux community forum, and

required for encoding is multiplied by 2), which also depends on the link bandwidth. Therefore, when the transmission distance between two points is very close, for example, 1 km, the transmission latency is ≈ 0.0066 MS, which can basically be ignored. So the formula changed to: transmission time = (data volume compaction link rate ). Therefore, the higher the link rate, the faster the encoding speed. It does not mean that the transmission speed is f