What is Workload, The various types of workloads possible and the way of Selecting Workloads accordingly as per different systems and different workload criteria applicable.

1. PRESENTED BY:
NOQAIYA ALI
M.TECH CSE 1ST
YEAR

2.  A workload is anything a computer is
asked to do
 Test workload: any workload used to
analyze performance
 Real workload: any observed during
normal operations
 Synthetic: created for controlled
testing

3. TEST WORKLOAD FOR COMPUTER
SYSTEMS
Addition Instruction
Instruction Mixes
Kernels
Synthetic Programs
Application Benchmarks

4. ADDITION INSTRUCTION
Sole workload used, and the
addition time was the sole
performance metric

5. INSTRUCTION MIXES
Specification of various
instructions coupled with their
usage frequency

6. KERNELS
Kernel = nucleus
Commonly used kernels:
Sieve, Puzzle, Tree Searching,
Ackerman’s Function and Sorting

7. SYNTHETIC PROGRAMS
To measure I/O performance
lead analysts ⇒ Exerciser loops
Exerciser loops can be quickly
developed and given to different
vendors

8. APPLICATION BENCHMARKS
Application dependant
Ex: Debit-Credit Benchmark

10. Some well-known Benchmarks
Sieve
Used to compare, Microprocessors,
Personal computers and high level languages
Ackerman’s Function
Used to assess the efficiency of the
procedure calling mechanism in ALGOL-like
languages.

11. Some well-known Benchmarks
Whetstone
LINPACK
DHRYSTONE
Lawrence
Livermore Loops
Debit-Credit Benchmark

12. SPEC Benchmark Suite
Systems Performance
Evaluation Cooperative
(SPEC):
Nonprofit corporation
formed by leading computer
vendors to
develop a standardized set
of benchmarks.

13. Some well-known Benchmarks
GCC
Espresso
Spice 2g6
Doduc
NASA7
LI
Eqntott
Matrix300
Fpppp
Tomcatv

15. 4 Major Considerations in Selecting
Workload
Services
exercised
Level of detail
Loading level
Impact of other components
Timeliness

16. Services Exercised
 SUT
= System Under Test
 CUS = Component Under Study

17. Level of Detail
Most frequent request
Frequency of request types
Time-stamped sequence of
requests
Average resource demand
Distribution of resource demands

18. Representativeness
Arrival
Rate
Resource
Demands
Resource
Usage Profile

19. Timeliness
Difficult to achieve.
New systems implying new
workloads
Users tend to optimize the
demand