真のCPU使用率 by Brendan Gregg@Netflix - ablog
自分の「シンプルでシステマチックな〇〇性能分析」のルーツな面々のうちの2人*1 Brendan Gregg@Netflix と Tanel Poder@Gluent が素敵な絡みをしていたのでメモ。 @brendangregg Could be useful: I once documented my understanding of the typical CPU counters that perf exposes all in one place: https://t.co/pqaDdbDyi1— Tanel Poder (@TanelPoder) 2017年5月10日 Brendan Gregg はざっくり、以下のようなことを言っている。 CPUの1サイクルと比較してメモリアクセスは遅い*2ので、ON CPU でもメモリI/O*3待ちでストールしてることが多い。 IPC(Instr
Mappedbus: A library for low latency IPC between multiple Java processes/JVMs
A library for low latency IPC between multiple Java processes/JVMs Mappedbus is a Java based high throughput, low latency message bus, using either a memory mapped file or shared memory as transport Mappedbus was inspired by Java Chronicle with the main difference that it's designed to efficiently support multiple writers – enabling use cases where the order of messages produced by multiple proces
Intro to IPC | Interprocess Communication
Interprocess communication is defined as follows on Wikipedia: In computing, inter-process communication (IPC) is a set of methods for the exchange of data among multiple threads in one or more processes. Processes may be running on one or more computers connected by a network. More or less it is exactly what you would expect, the transfer of data between processes. This may sound straight forward
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135 Million messages a second between processes in pure Java
