When it comes to comparing network/embedded CPUs, there is more than just MHz that needs to be considered. Some CPUs have multiple cores, hardware accelerators, etc. For example, we use a Gemini SL3512 CPU in some of our products. Here are some of the accelerators that it has:
-Layer2/3/4 hardware switching, routing and NAT with 4 transmit queues per port for QoS support -Layer2-7 packet classification into 16 receive queues -Transmit acceleration by TCP segmentation, IP fragmentation and TCP/IP/UDP checksum calculation -Receive acceleration by TCP connection table lookup, assembly of multiple packets belonging to the same TCP connection and TCP/IP/UDP checksum verification -Hardware Security Acceleration Engine performs DES, 3DES, AES, CCMP and RC4 encryption/decryption with CBC or ECB mode operation; authentication with SHA1, MD5, HMAC-SHA1 and HMAC-MD5 hashing algorithm All of these functions are then offloaded from the main CPU which can perform other functions. Just the first one (hardware NAT accelerator) can increase NAT throughput by an order of magnitude. -Hal Ligowave -----Original Message----- From: Bo Ring <[EMAIL PROTECTED]> Reply-To: WISPA General List <wireless@wispa.org> To: WISPA General List <wireless@wispa.org> Subject: Re: [WISPA] RB532 and 40MBps Date: Tue, 15 Jul 2008 21:54:00 -0500 > Question is.... Why does teh 600 series outperform them all, when it > has the > slowest processor in MHZ? > > Are Mikrotik's 532a speeds test at 266 or 400Mhz? And the 600 series > at 200 > or 400? They did specify on their report. > > Is the 600's Power PC's processor really that much better that it > gets so > much better speed at slower Mhz? While I can not speak of it in use between these two routers, there is a reason why it was logical to move to RISC. They are more efficient chips and tend to be even more so when they are used in specific environments. If anyone is a Mac head from way back, you might remember the raw numbers between the 40MHz 68030 and the 25MHz PowerPC when Apple first moved to them. Bo Ring Account Manager [EMAIL PROTECTED] cell: 630-743-1162 • office: 312-205-2515 16W235 83rd Street, Suite A, Burr Ridge, IL 60527 • tel: 773.667.4585 fax: 773.326.4641 -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/