为大家解疑--关于第三版手机处理器的问题
[color=blue]回来后第一贴，居然是在第三版，呵呵，连我自己都没有想到吧。[/color][size=6][color=#0000ff]常有人发帖质疑第三版手机处理器的频率（如6120，N81,5700,N76等的处理器的频率到底是192MHZ还是369MHZ）而且很多软件测试出来的结果都是192MHZ，的确，这不得不让人产生怀疑。
但是，我们要清楚，那些软件只能测试出基于ARM9以下（包含ARM9）的方案的处理器型号，是不能真正得出ARM11方案的处理器真实频率的。[/color][/size]
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[size=6][color=blue][color=red]目前只有一款软件也是唯一的一款（或许已经有其他软件可以支持ARM11了，但是这个是最为权威的）[/color]能够真实测试出6120，N76,5700等第三版手机处理器主频（包括同类ARM11处理器）的真实频率，那就是[color=#ff0000]JBenchmark[/color]公司和ARM公司合作开发的[/color][color=red]JBenchmark ACE[/color][/size]
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[size=6][color=#ff0000][color=#000000]（以下信息来源于[/color][color=#ff0000]JBenchmark[/color][color=#000000]官网）
[size=6]Brief explanations of the estimated properties[/size]
[b]CPU class and clock rate[/b]
Most mobile devices use derivatives of ARM CPUs, which can be grouped in three main classes: ARM7, ARM9 and ARM11.
As the class names indicate, ARM11s (250 MHz+) are usually faster than ARM9s (100 MHz+) and ARM7s (40-80 MHz). The big exceptions are XScale CPUs from Intel, which are relatives of ARM9 running at high (200-600 MHz) clock rates.
JBenchmark ACE has been successfully tested with 40 to 400 MHz CPUs.
[b]Compiler VMs[/b]
Java Virtual Machines (VM) are used to run Java programs in mobile phones.
Some VMs compile big chunks of Java bytecodes into native CPU instructions before running them. These are the so-called compiler VMs.
These VMs use more memory and usually reach higher peek performance compared to non-compiler VMs.
(Non compiling VMs interpret Java bytecodes sequentially as they are running the applications. These interpreter VMs need very small memory footprint and are typically used in older and/or more limited devices.)
[b]Jazelle acceleration[/b]
Jazelle is a hardware acceleration technology for Java execution on select ARM CPUs. These microprocessors run most of the Java bytecodes natively, ie. without the need to compile/interpret the Java bytecodes into ARM specific intstructions.
Jazelle enabled VMs can achieve similar performance to compiler VMs using small memory footprint.
[b]About ARM[/b]
[/color][color=red]According to the latest figures, virtually all mobile phones use at least one ARM-designed processor. JBenchmark ACE targets and identifies all major ARM core families: ARM7, ARM9 and the latest ARM11 line of CPUs.
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[color=#000000]Each ARM processor class has different performance profile and differing range of clock rates which are reported back by JBenchmark ACE.
[/color][size=6][font=黑体][color=#ff0000]注：本软件测试需要链接网络返回数据到[font=Tahoma]JBenchmark[/font]的测试服务器，然后才能得出结果，并非本地直接得出结果[/color][/font][/size]
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[size=6][color=#ff0000]官网下载地址：[/color][/size][url=http://www.jbenchmark.com/download.jsp?benchmark=ace][size=6][color=#0000ff]http://www.jbenchmark.com/download.jsp?benchmark=ace[/color][/size][/url]
[size=6][color=#ff0000]这里贴上一张6120C的测试结果图[/color][/size]
[img]http://cimg2.163.com/catchpic/E/E4/E46DFC70DCCA0BCA0E1356C54E8CCC7E.jpg[/img] 到底5700是多少 觉得5700够快就好了~
呵呵
不过还是要谢谢楼住的 [quote]原帖由 [i]atimkid[/i] 于 2008-7-13 21:23 发表 [url=http://www.sjbus.com/redirect.php?goto=findpost&pid=2478447&ptid=114587][img]http://www.sjbus.com/images/common/back.gif[/img][/url]
到底5700是多少 [/quote]
5700的处理器是跟6120C一样的，在370MHZ左右浮动 有长见识了！谢谢楼主
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