GeForce 8600 and Radeon HD 2600

HD decoding enhancement and acceleration with the new mid-range graphics accelerators.

The newest recent mid-range graphics cards from AMD-ATI and NVIDIA have an extended and new video processing unit that can decode all the Blu-Ray and HD-DVD glory. We figured it was a good time to put some of the newer graphics cards to the test. We picked up a Toshiba HD-DVD player, seated it into a test system and started designing a couple of tests. As you might know, HD DVD is a new high definition video disc standard that delivers up to six times the image quality of  movies. HD DVD (and Blu-ray) is a major advancement over video discs in the same ....

نوشته شده توسط جبار اسدی در دوشنبه 12 آذر1386 | موضوع: اخبار انگلیسی

Red Hat Enterprise Linux 5.1 utilizes nested paging on AMD Barcelona Processor to improve performance of virtualized guestsRed Hat Enterprise Linux 5.1 utilizes nested paging on AMD Barcelona Processor to improve performance of virtualized guests

Red Hat® Enterprise Linux® (RHEL) 5.1 provides paravirtualized (PV) drivers for guest operating systems to improve I/O performance for I/O intensive disk or network applications.

In addition, RHEL 5.1 supports a feature called “nested paging,” available on AMD Barcelona processors, that translates guest virtual memory addresses to machine physical addresses using two-level translation in the hardware. Without nested paging, the hypervisor marks all page table pages as read only. So whenever the guest tries to update a page table, the call is trapped by the hypervisor that does the update. The shadow page tables on the guest are refreshed on a context switch, resulting in TLB misses on the guest. With nested paging, page tables are not refreshed with context switches, lowering the TLB miss count. The hypervisor also does not need to trap the updates to the page tables, since the hardware does the translation.

We ran a series of tests with an online transaction processing (OLTP) workload on Oracle 10G databases. We used this workload because it is a very common type of database implementation that uses both memory and I/O sub-systems. The test results demonstrate the performance gains achieved by using nested paging and PV drivers.

As the table below shows, adding nested paging almost doubles the performance for this workload, which uses the memory sub-system aggressively, as there are many page modifications. However it is still quite a bit off the performance numbers from the base system because I/O is still going through the emulation layer. When both nested paging and PV drivers are combined, we were able to get to 75% of bare metal and 3.5 times the performance on a fully virtualized guest on this I/O intensive workload.

Details ...

نوشته شده توسط جبار اسدی در دوشنبه 5 آذر1386 | موضوع: اخبار انگلیسی

بچه ها از این به بعد قسمت اخبار انگلیسی رو هم به وبلاگ اضافه کردم .این طوری بعضی اخبار رو بدون ترجمه از منبع اصلی خبر براتون می ذارم.(این طوری هم وبلاگ جنبه دو زبانه پیدا می کنه هم شما انگلیسیتون خوب می شه ) .

Microsoft still hoping consumers see 'Wow' in Vista

Microsoft is hoping that with some of Vista's wrinkles ironed out, customers will start noticing more of the advantages the year-old operating system has over its predecessor.

In an interview Wednesday morning, Corporate Vice President Mike Nash acknowledged that the initial experience for many consumers was a frustrating one as they found their old software might not work right or that their hardware lacked the proper driver

But, he insists, the situation is much better now. Not only are the hardware drivers out there, they are readily available.

"You don't have to go on a scavenger hunt," Nash said. "They are on Windows Update."

Just this week, Microsoft said it was releasing three patches that aim to fix some of the most nagging lingering problems with the operating system, including wireless networking woes and USB-related problems that account for 1 percent to 2 percent of all reported crashes.

Microsoft is also toying with a new way of improving its operating system ...

نوشته شده توسط جبار اسدی در پنجشنبه 24 آبان1386 | موضوع: اخبار انگلیسی