- published: 14 Mar 2015
- views: 679774
In parallel computing, speedup refers to how much a parallel algorithm is faster than a corresponding sequential algorithm.
Speedup is defined by the following formula:
where:
Linear speedup or ideal speedup is obtained when Failed to parse (Missing texvc executable; please see math/README to configure.): \,S_p = p . When running an algorithm with linear speedup, doubling the number of processors doubles the speed. As this is ideal, it is considered very good scalability.
Efficiency is a performance metric defined as
. It is a value, typically between zero and one, estimating how well-utilized the processors are in solving the problem, compared to how much effort is wasted in communication and synchronization. Algorithms with linear speedup and algorithms running on a single processor have an efficiency of 1, while many difficult-to-parallelize algorithms have efficiency such as Failed to parse (Missing texvc executable; please see math/README to configure.): \frac{1}{\ln p} [citation needed] that approaches zero as the number of processors increases.
In kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity. The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero .
Like velocity, speed has the dimensions of a length divided by a time; the SI unit of speed is the meter per second, but the most usual unit of speed in everyday usage is the kilometer per hour or, in the USA and the UK, miles per hour. For air and marine travel the knot is commonly used.
The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum c = 299,792,458 meters per second, approximately 1079 million kilometers per hour (671,000,000 mph). Matter cannot quite reach the speed of light, as this would require an infinite amount of energy. In relativity physics, the concept of rapidity replaces the classical idea of speed. In day-to-day athletics, it is proper to say that a teenager can achieve atleast 20 kmph (or 12.43 mph) of speed while a best runner can achieve 30 kmph (or 18.64 mph) which is similiar to run 100m running race in about 12 seconds. The average speed for a teenager is 24 kmph, which can be a result on running 100m in 15 seconds.
INTRO:
Call it love…
You’re alone if you try to follow…
Call it hate…
You’re alone if you try to…
VER1:
I’ll never declare you a deity,
(even though I want it to be reality)
I’ll never idolize you, cuz your flesh and blood.
(even though I feel more than just sympathy)
Sometimes I wanna follow someone to the edge of the
earth
(even though I know that I will never do that)
Bring me to the brim; bring me to the verge,
Take me to the brink, take me to the edge
Till we’re out of line.
VER2:
Sometimes I wish I could be your goddess,
(even though I’ll never ever lead you somewhere)
Sometimes I feel like you can become my demon.
(even though I’ll never follow you to nowhere)
We push our lives forwatill da moment we die
(you can walk beside me, but don’t step in my way)
I’ll bring you to the brim; bring you to the verge,
Take you to the brink, take you to the edge
Till we’re out of line.
BRIDGE:
Catch up with me
If you wanna speed up with me,
Hold on with me,
You got no time to hesitate
I slow down with you
If you want to become a part of me,
And I stop with you
If we speed up together.
CHOR1:
Call it love
(or any other romantic stuff)
Call it hate.
(if you have nothing to tell me)
Anyway
(no matter what you pretend to be)
You are alone if you try to follow.
Walk beside
(If you want to be with me)
Or curse your fate
(I won’t regret if you leave)
Never stop
(closing in equals death)
You are alone if you try to conduct me.
BRIDGE:
Don’t give up
no matter what you pretend to be
Don’t give up
no matter what you want to be
Don’t give up
no matter what you really are
Don’t give up
cuz I’ll turn my back on you.
VER3:
I know the way that it happens
(Close up your illusions, I need reality)
Second after second and day after day
(even though you fill more than just sympathy)
You’ll claim my freedom, but I’ll refuse
(even though I’d feel like I would give it you).
Somewhere on the brim; somewhere on the verge,
Somewhere on the brink, somewhere on the edge
When we’re out of line.
VER4:
Perhaps I could love you more than anyone else…
(Second after second and day after day)
Perhaps I could share some time with you…
(Minute after minute and year after year)
But I’ll never exchange my way for you
(sure I do it if you try to steal me away)
Somewhere on the brim; somewhere on the verge,
Somewhere on the brink, somewhere on the edge
When we’re out of line.
BRIDGE:
Catch up with me
If you wanna speed up with me,
Hold on with me,
You got no time to hesitate
I slow down with you
If you want to become a part of me,
And I stop with you
If we speed up together.
CHOR2:
Call it love
(or any other romantic stuff)
Call it hate.
(if you have nothing to tell me)
Anyway
(no matter what you pretend to be)
You are alone if you try to follow.
Walk beside
(If you want to be with me)
Or curse your fate
(I won’t regret if you leave)
Never stop
(closing in equals death)
You are alone if you try to conduct me.
JOINT:
Perhaps I could love you more
Don’t give up! Don’t! Don’t give up!
If we speed up together…
Don’t give up! Don’t! Don’t give up!
Perhaps I could love you more
Don’t give up! Don’t! Don’t give up!
If we slow down together…
Don’t give up! Don’t! Don’t give up!
CHOR3,4:
Call it love
(or any other romantic stuff)
Call it hate.
(if you have nothing to tell me)
Anyway
(no matter what you pretend to be)
You are alone if you try to follow me.
Walk beside
(If you want to be with me)
Or curse your fate
(I won’t regret if you leave)
Never stop
(closing in equals death)
You are alone if you try to conduct me. X2
BRIDGE:
Call it love…
You’re alone if you try to follow…
Call it hate…
You’re alone if you try to follow…
JOINT:
Perhaps I could love you more
Don’t give up! Don’t! Don’t give up!
If we speed up together…
Don’t give up! Don’t! Don’t give up!
Perhaps I could love you more
Don’t give up! Don’t! Don’t give up!
If we slow down together…
Don’t give up! Don’t! Don’t give up! X2
CODA:
Perhaps I could love you (don’t!),
Perhaps I could love you (don’t!),
Perhaps I could love you (don’t!),
More… x2
OUTRO:
Call it love…
You’re alone if you try to follow…
Call it hate…