Where'd all my memory go? SCALE 12x SCALE12xJoshua Miller
Insufficient memory is a regular problem for systems, and finding what is using up our memory can be tricky. In this session we look at the linux kernel memory system : where memory is consumed, why, and what to do about it. We'll explore memory metrics through utilities like top, ps, vmstat, pmap, and slabinfo. We'll start with the basics of memory in the Linux kernel - overviewing the relevant fields in top, looking at per process statistics in ps, but then quickly work up to more complex matters. Topics will include paging, swapping, caches, buffers, the Linux VFS, and shared memory. Throughout the presentation we'll look at sample cases which highlight particular components, the circumstances in which that component might become involved in using a significant portion of a system's memory, and discuss how and whether tunables should be used to manage how the kernel manages its resources.
Slides della sessione su Automatic Reference Counting, tenuta da Giuseppe Arici alla WhyMCA 2012.
http://www.whymca.org/intervento/automatic-reference-counting
Where'd all my memory go? SCALE 12x SCALE12xJoshua Miller
Insufficient memory is a regular problem for systems, and finding what is using up our memory can be tricky. In this session we look at the linux kernel memory system : where memory is consumed, why, and what to do about it. We'll explore memory metrics through utilities like top, ps, vmstat, pmap, and slabinfo. We'll start with the basics of memory in the Linux kernel - overviewing the relevant fields in top, looking at per process statistics in ps, but then quickly work up to more complex matters. Topics will include paging, swapping, caches, buffers, the Linux VFS, and shared memory. Throughout the presentation we'll look at sample cases which highlight particular components, the circumstances in which that component might become involved in using a significant portion of a system's memory, and discuss how and whether tunables should be used to manage how the kernel manages its resources.
Slides della sessione su Automatic Reference Counting, tenuta da Giuseppe Arici alla WhyMCA 2012.
http://www.whymca.org/intervento/automatic-reference-counting
Travel Solutions, afiliado al Buró de Convenciones de Bogotá y Cundinamarca es un DMC que presta sus servicios a la industria de los Eventos en Bogotá, Cundinamarca y Colombia.
El Roble es una BTL en Bogotá y OPC en Bogotá afiliado al Greater Bogotá Convention Bureau, entidad de promoción de Bogotá y Cundinamarca como destino de congresos, convenciones y viajes de incentivo
Travel Solutions, afiliado al Buró de Convenciones de Bogotá y Cundinamarca es un DMC que presta sus servicios a la industria de los Eventos en Bogotá, Cundinamarca y Colombia.
El Roble es una BTL en Bogotá y OPC en Bogotá afiliado al Greater Bogotá Convention Bureau, entidad de promoción de Bogotá y Cundinamarca como destino de congresos, convenciones y viajes de incentivo
This conference was .NET CONF Taiwan in 2022/12/10.
LangChain is one of the most mainstream frameworks for developing large language model applications. Its ease of use and simplicity enable developers to quickly build product prototypes. Azure Machine Learning is currently one of the most mainstream tools for AI research and application development. It offers comprehensive features and is well integrated with the Python and AI ecosystem.
This talk will introduce the basic concepts of LangChain, including key components such as Model, Chain, and Retriever, and will use the capabilities of Azure Machine Learning as examples. Additionally, it will discuss how to integrate LangChain into Azure Machine Learning and Azure Open AI, allowing developers to leverage the advantages of Azure Machine Learning to rapidly develop large language model applications.
Agenda
什麼是 .NET Standard?
.NET Standard 與 .NET Core 的曖昧關係
.NET today—reusing code
.NET tomorrow—reusing code
What's new in .NET Standard 2.0?
How does .NET Standard work?
Demo: .NET Standard Library vs. Class Library
Demo: .NET Portability Analyzer
Demo: Multi-Targeting with .NET Standard
Demo: .NET Standard 改寫包裝 EasyArchitect - 開發跨平台商業應用程式
4. 第一次关于 HTML 的公开描述
Re: status. Re: X11 BROWSER for WWW
Tim Berners-Lee (timbl)
Tue, 29 Oct 91 10:03:11 GMT+0100
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Date: Tue, 29 Oct 91 10:03:11 GMT+0100
From: timbl (Tim Berners-Lee)
Message-Id: <9110290903.AA07413@ nxoc01.cern.ch >
To: connolly@pixel.convex.com, www-talk
Subject: Re: status. Re: X11 BROWSER for WWW
Dan,
> I've made some tangible progress on the X11 browser, so I though
> I'd let you know.
> ...
> This code is not in any shape to distribute, or even show anybody.
> But it works, and it's pretty speedy. That's enough to encourage me
> to polish it off.
Sounds like great progress! The TCL sounds interesting -- where did
you get it?
> [If you wan't my stuff, you'll have to be C++ capable. I can't
> think in C any more. :-]
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5. HTML Tags
This is a list of tags used in the HTML language. Each tag starts with a tag opener (a less than sign) and ends with a tag closer (a greater than sign).
Many tags have corresponding closing tags which identical except for a slash after the tag opener. (For example, the TITLE tag).
Some tags take parameters, called attributes. The attributes are given after the tag, separated by spaces. Certain attributes have an effect simply by their
presence, others are followed by an equals sign and a value. (See the Anchor tag, for example). The names of tags and attributes are not case sensitive:
they may be in lower, upper, or mixed case with exactly the same meaning. (In this document they are generally represented in upper case.)
Currently HTML documents are transmitted without the normal SGML framing tags, but if these are included parsers will ignore them.
Title
The title of a document is given between title tags:
<TITLE> ... </TITLE>
The text between the opening and the closing tags is a title for the hypertext node. There should only be one title in any node. It should identify the
content of the node in a fairly wide context, and should ideally fit on one line.
The title is not strictly part of the text of the document, but is an attribute of the node. It may not contain anchors, paragraph marks, or highlighting. the
title may be used to identify the node in a history list, to label the window displaying the node, etc. It is not normally displayed in the text of a
document itself. Contrast titles with headings .
Next ID
Obsolete: NeXT Browser only. May be ignored. This tag takes a single attribute which is the number of the next document-wide numeric identifier to
be allocated (not good SGML). Note that when modifying a document, old anchor ids should not be reused, as there may be references stored
elsewhere which point to them. This is read and generated by hypertext editors. Human writers of HTML usually use mnemonic alpha identifiers.
Browser software may ignore this tag. Example of use:
<NEXTID 27>
Base Address安博中程在线 5/25
6. 1993年
第一份草案
安博中程在线
1993年,伯纳斯-李向 IETF 提交了 HTML 规范的第一份提案。
六个月后草案过期了,但是值得注意的是草案对 Mosaic 浏览器自定义的内置
images 标签的确认,反映了 IETF 在成功的原型基础上确立标准的哲学。
由于 IETF 草案要求实现,所以 HTML 草案引用了 Mosaic,而 Mosaic 呢?如果没
有 HTML 也是没有价值的,所以浏览器和 Web 标准之间的共生关系从一开始就在
驱动网络。
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16. 总结一下
之前 HTML 出现格式错误,浏览器仍然可以显示;现在 XHTML 要求浏览器执行严苛
的错误处理,XHTML 出现哪怕一个错误,也要求 Web 浏览器停止继续处理并给用户
显示报错信息;
由于互联网上99%的页面至少都存在一个错误,如果浏览器严格执行这个标准的话,
用户获得错误提示的可能性几乎一定存在。
同样 XForms 也强制使用严苛的错误处理方式,W3C 认为格式错误是 Web 的一个根
本问题,想着手对其纠正。
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17. 2004.06
WHAT工作小组的诞生
XHTML2.0 几乎每什么进展,而且 W3C 针对是否应该继续发展 HTML 和 CSS 两次投
票都没有通过,而且也不打算进行第三次非正式投票。
那些提议发展 HTML 和 HTML 表单的人只剩下两种选择:放弃,或者在 W3C 之外继
续工作。
他们选择了后者,注册了 whatwg.org 域名,然后在2004年6月,WHAT 工作小组诞
生了。
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18. WHATWG 介绍
在 WHAT 后来的的一份 FAQ 中提到“ Mozilla 和 Opera 越来越担心 W3C 的以 XHTML
为方向,对 HTML 缺乏兴趣,而且对现实世界的需求明显无视。所以这些组织共同的
使命就是解决这些问题,于是 WHATWG 因此就诞生了” 。
WHAT 是 Web 超文本应用技术的缩写。WHATWG 主要由浏览器厂商(Apple,
Mozilla基金会,以及Opera)和有关各方成立。
为了不抹杀十多年以来在 HTML 上的成果,以及不让99%的现有网页变得无法可用,
WHAT 工作小组决定采用不同的方法:将浏览器实际所用的那些”宽容“的错误处理算
法文档化。
虽然花了几年的时间,但是 WHAT 工作小组还是将”如何以兼容现有 Web 内容的方式
解析 HTML “文档化了。最终的算法完全没有强制 HTML 停止处理并显示错误信息的
步骤。
安博中程在线 18/25
19. WHATWG 的其他工作
安博中程在线
Web Form 2.0规范 - 给HTML表单新增了一些控件类型;
Web Application 1.0规范草案,包含一些重要的新特性,例如支持直接模式绘图的
画布(Canvas),以及对音频和视频的无需插件的原生支持。Web App 1.0是对
HTML的一种渐进式的改进,人们很快就把他作为HTML5来引用。
大家可能要问,HTML不是由W3C负责的吗?没错,确实是他们。当年不一样是由
IETF负责的吗?对吧。
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20. 2006.10
回到W3C
数年时间之中,W3C 和 WHATWG 基本无视对方的存在。WHATWG 着眼于 Web 表
单和新的 HTML 特性,W3C 的 HTML 小组则忙于 XHTML 的2.0版本。
直到2006年10月,WHAT 工作小组明显已经取得重大成果,而 XHTML 2还煎熬在草
稿之中,而且没有任何的主流浏览器为他提供实现。
2006年10月中,Tim宣布 W3C 将和 WHATWG 合作来开发下一代的 HTML,他表
示:HTML应当逐步进化;一下子切换到XML不太现实;以及新的HTML小组将渐进地
同时改善HTML和XHTML;此外就是涉及到无处不在的表单的工作。
新组建的W3C HTML 工作小组的最初的几个决定之一就是将“Web Applications
1.0”更名为“HTML5”。随后W3C就解散了XHTML 2工作小组。
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