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- PC Magazine Labs Benchmarks Release 5.6 - README File
- -----------------------------------------------------
-
- INTRODUCTION
- ------------
-
- Welcome to Release 5.6 of the PC LABS BENCHMARK SERIES. In this
- release we have incorporated a new 80486 Instruction Mix Test and
- the ability to save a comma delimited results file. The Extended Memory
- Test has been renamed to the BIOS Extended Memory Test to more
- accurately describe its function. See the description of this test for
- more details. We have also included detection of a 1004 error code
- (Sector Not Found) in the DOS Disk Access Test and allowed the DOS Disk
- Access and BIOS Disk Seek tests to automatically recover and continue
- after a seek error.
-
- This file contains a brief description of each of the benchmark
- tests. The file BENEXEC.TXT describes how to execute the tests and
- may be viewed by selecting Execution from the BENCHINS menu or using
- DOS commands to COPY, TYPE, or PRINT it.
-
- The benchmark files are distributed in a compressed format and should
- be installed by selecting Installation from the BENCHINS menu.
-
-
- DESCRIPTIONS OF TESTS
- ---------------------
-
-
- SYSTEM INFORMATION
-
- PC Labs' MicroScope looks "under the hood" of your machine and displays
- important information about its configuration. Each section of the
- screen expands when selected to show even more detail. Memory, device
- drivers, disk drives, processor type and speed are some of the
- information MicroScope makes available. The current configuration can
- also be saved in a disk file for future review.
-
-
- PROCESSOR PERFORMANCE TESTS
-
- PLEASE NOTE: Since the execution speed of microcomputers is incredibly
- fast, the functions described in the Processor Performance Tests are
- performed many times in a loop to produce the published results. While
- the number of iterations varies from test to test, they are consistant
- within each test when testing different machines.
-
-
- INSTRUCTION MIX
- ---------------
- The Instruction Mix benchmark test times a series of tasks specific to
- the 8088, 80286, or 80386 chip. Since this test shows how the CPU
- operates in the context of the bus, processor, system memory, and
- motherboard architecture, a faster time means better overall computer
- performance.
-
-
- 80486 INSTRUCTION MIX <--- NEW <<
- ---------------------
- This test, based upon the test above, contains additional instructions
- unique to the 80486 chip.
-
-
- 128K NOP LOOP
- -------------
- The 128K NOP Loop benchmark test times the execution of a loop
- containing 128K of NOP instructions.
-
-
- DO-NOTHING LOOP
- ---------------
- The Do-nothing Loop benchmark test times the execution of a loop
- containing one NOP instruction.
-
-
- INTEGER ADD
- -----------
- The Integer Add benchmark test times the execution of a loop
- containing an ADD instruction.
-
-
- INTEGER MULTIPLY
- ----------------
- The Integer Multiply benchmark test times the execution of a loop
- containing a IMUL instruction.
-
-
- STRING SORT AND MOVE
- --------------------
- The String Sort and Move benchmark test times the execution of a
- bubble sort performed on 200 random strings containing 16 characters
- each.
-
-
- PRIME NUMBER SIEVE
- ------------------
- The Prime Number Sieve benchmark test times the execution of a routine
- to find the prime numbers between 0 and 8190.
-
-
- FLOATING POINT MIX
- ------------------
- The Floating Point Mix (also known as the Floating Point Calculation
- Without Coprocessor) benchmark test sets up a floating point emulation
- program in RAM and then exercises the processor and tests RAM access
- speeds during floating point calculations. The floating point
- processes performed are identical to those used in the Coprocessor
- Test.
-
-
-
- COPROCESSOR PERFORMANCE TESTS
-
- COPROCESSOR SPEED TEST
- ----------------------
- The Coprocessor Speed benchmark test exercises the coprocessor using
- the same floating point calculations used in the Floating Point Mix
- Test. In addition to testing the speed differences of coprocessors in
- different machines, the speed gained by using a coprocessor can be
- seen by comparing the two floating point tests on the same machine.
-
-
-
- DISK PERFORMANCE TESTS
-
- BIOS DISK SEEK
- --------------
- The BIOS Disk Seek benchmark test measures mechanical track-to-track
- disk drive access times. Fast times are helpful with programs such as
- databases, which often store and must later find data in many separate
- places on a drive. Both sequential and random access is tested.
-
-
- DOS DISK ACCESS
- ---------------
- The DOS Disk Access benchmark test measures the time necessary to
- perform 1000 read requests at random locations on the disk via DOS
- calls.
-
-
- NOTE: If a seek error occurs in either of the above tests a message
- ---- will appear for a few seconds, a replacement sector will be chosen
- and the test will continue. This is NOT necessarily an indication
- of a bad disk drive. These tests access sectors which may have
- been legitimately locked out during the formatting of the drive.
- If you suspect a problem with your drive use a diagnostic program
- to test the drive.
-
-
- DOS FILE ACCESS
- ---------------
- The DOS File Access (Small and Large Records) benchmark test times
- disk throughput as a result of mechanical disk drive speed, hard disk
- controller function, and bus speed. The test may be used to show the
- effects of disk caching by running both with and without a cache. Fast
- times for a particular record length are advantageous when working
- with an application that uses a similar record length.
-
-
- DOS VARIABLE SIZE FILE ACCESS
- -----------------------------
- The DOS Variable File Access (Small and Large Records) benchmark test
- is similar to the DOS File Access test and has been designed primarily
- for testing hardware and software disk caches. The small record size
- is 200 bytes and the large record size is 2048 bytes. File sizes range
- from 300 to 19,200 records for small records and 30 to 1,920 records
- for large records.
-
-
-
- VIDEO PERFORMANCE TESTS
-
- DIRECT SCREEN ACCESS
- --------------------
- The Direct Screen Access benchmark test times the writing of data
- directly into screen memory. Fast times are advantageous for
- application programs that bypass slower BIOS and DOS calls and write
- directly to the screen.
-
-
- TELETYPE WITHOUT SCROLLING
- --------------------------
- The Teletype Without Scrolling benchmark test times the writing of
- data to the screen using BIOS calls. Fast times are advantageous for
- programs that display large amounts of data in a non-scrolling
- fashion.
-
-
- TELETYPE WITH SCROLLING
- -----------------------
- The Teletype With Scrolling benchmark test times the writing of data
- to the screen using BIOS calls but adds the time necessary to scroll
- the entire screen up one line at a time once the screen is initially
- filled. This test writes the same amount of data as the non-scrolling
- test. The difference between the two times indicates the overhead
- attributable to scrolling the screen. Fast times are advantageous for
- application programs that frequently cause the screen to scroll.
-
-
-
- MEMORY PERFORMANCE TESTS
- ------------------------
- The Memory Performance benchmark tests indicate the time needed to read
- and write data to conventional, expanded, and extended memory areas.
- Due to advances in the 80386 and 80486 processor chips, the results
- obtained using the Extended Memory tests with this processor are not
- indicative of all programs using extended memory on 80386 and 80486
- machines. The test uses the BIOS function for switching in and out of
- Protected Mode. The BIOS call is not commonly used to perform this
- function on a these machines. The test has been renamed the BIOS
- Extended Memory Test to indicate its specific use of the BIOS functions.
-
-
- PRINTER SPEED TEST
- ------------------
- The Printer Speed benchmark test times the throughput of your printer
- by printing a typical two-page business letter. Because this is a
- throughput test, our results are almost always slower than the speeds
- claimed by manufacturers, who usually clock a one line "burst" speed.
-
-
-
- ADDITIONAL INFORMATION
-
- Additional information may be found accompanying reviews in PC
- Magazine. If you have any specific questions or suggestions, please
- send them along with your registration form or in a separate letter
- addressed to: PC Labs Benchmark Registration, 1 Park Avenue, New
- York, NY, 10016. PC MagNet is also an excellent source of information
- as well as a place to post questions.
-
-
-
- Thank you for using the PC Labs Benchmark Series Release 5.6.
-
-
- Sincerely,
-
- C. James Galley III
- Director, PC Labs