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operand_1

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pc

variable_n

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variable_1

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LPI

public class Foo {

private Bar bar = new Bar(...);

public void f() {

// calling method

int l = 0;

java.util.Date today = ...;

java.util.Vector v = new Vector();

if (...) {

boolean test = false;

...

}

int k = 5 * bar.b(today);

...

}

}

if isCapturing() {

store stack frame into

context;

store artificial PC as

LPI−index;

return;

}

hL¨n?))L12¤,¦©¤,63f6¤9¦©)J¦©¨3N¦©¨02QZ2(&V?¨3N¦n©¦(©¦d:Q@L¦Z¦©¨¦n¦©"F.K|¦©¨3N¦©¨02dvw

LPI

public class Bar {

public int b(java.util.Date date) {

// top frame’s method

...

Computation.capture();

...

return ...;

}

}

if isCapturing() {

store stack frame into

context;

store artificial PC as

LPI−index;

return;

}

Go to previous stack frame

Et>.6 !: !J_9¦(¦ L¦©6©¤>

H©¨2U7XPaRW_QTS_d7XWe`.cNd7X

B


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% 6"$3c¦1¦©¨Z"F¦©¨319dvw #J>{£8:shL¨n063a¤9-'12&9¤>A¦©¨3

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¤38e!¦b"F¦©¨31PN12¤N¦©¨3+"F¦©¨31PdvwL©¦(2&x:|hL¨3=©¦©6¦©12¤Nbx0¦N6¤,¦©)¦©¨3+¦©¨02N02¨3¦©¨3

>}|¦©¨3¤$)0F¤3n¦©¨3¦©¨02n12¤9¦©¤,63

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Et>.6

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¡(&'Z1¢%

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¤3©¦

Fo(ag3>.6 !:" £8:}Ui¨3¤¢¦©¨3Z¦©¨02¢I¦1Exc©¦12dKsN¤3z¦©¨02¢}©¦(©¦/¤3

¦+8e6¦©12¤[)&'}¤312¦©¨¤>N¨¤3d:

LPI

LPI

public class Foo {

private Bar bar = new Bar(...);

public void f() {

// calling method

int l = 0;

java.util.Date today = ...;

java.util.Vector v = new Vector();

if (...) {

boolean test = false;

...

}

int k = 5 * bar.b(today);

...

}

}

public class Bar {

public int b(java.util.Date date) {

// top frame’s method

...

Computation.capture();

...

return ...;

}

}

if isRestoring() {

get LPI from context;

switch (LPI) {

...

case invoke_b:

load stack frame;

goto invoke_b;

...

}

}

if isRestoring() {

get LPI from context;

switch (LPI) {

...

case invoke_capture:

load stack frame;

goto invoke_capture;

...

}

}

Go to next stack frame

È >.64!:" !J_9¦(¦aWR¦()©¨"F¤,¦

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;=¤3$14b¦©¨3"$1m-'"F¤,¦cJ¨-'"%2¦1E¦©¨a)>'12©¦©¨"y1m-'T¦©¨3n12©>.¤)J12¤3c4o12"

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p)¡

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, ¡ #" 6n12¤,¦(¤3 ¦ ¦ ¨357¦


- ¡ £¥(§©¦©¦©¦98 6;: ¦ ¦(<


/ ¡ 57¦0" a

57¦ 13¡

thread t(i)

f()

1

b()

3

bar

3

foo

1

2

restore

switch

2

b()

f()

call stack t(i)

context(i)

capturing

reestablishing

4o12{©¦(¦R0¦©6©¤> Fq¤,6"Zb¤%) £r¤3¦()©¨¤> Fq¤96"7

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?¨(¨N0¤$¤,-'12&'R¦©¨¦{"F¦©¨31PF¤3$6©-')

%©¦0vwb)S2br¤312¦{&P¤310'12©¦©¨"

% ¦©S)HGm¦©12¤ "F(¨¤©" 1Pf¤312¦M©6x12©¦©S)HGm¦©12¤ 14n¦(¦©Ag)

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hL¨3=8e!¦©12¤N¦1T¦©¨+)(©

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120

100

Execution time (seconds)

100

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

Execution time (%)

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

100

100

Execution time (seconds)

80

60

40

20

Execution time (%)

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

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100

100

Execution time (seconds)

80

60

40

20

Execution time (%)

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

Et>.6 $P:" !?hL¨3cx 4o12©"%¤3n10-'©¨302¢14{9 9¦n19Z¦©(¤3 4]12©"%¦©12¤3}14JMv ¤3

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Execution time (seconds)

120

100

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

Execution time (%)

100

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

Et>.6 $P:% !ChL¨3¢x 4o12©"%¤3/1m-'©¨302

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25

100

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Execution time (seconds)

20

15

10

5

Execution time (%)

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

60

100

Execution time (seconds)

50

40

30

20

10

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

Execution time (%)

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

¦©¨02[x

Et>.6 $P: !?hL¨3cx 4o12©"%¤3n10-'©¨302¢14{9 9¦n19Z¦©(¤3 4]12©"%¦©12¤3}14J w¤3

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60

100

Execution time (seconds)

50

40

30

20

10

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

Execution time (%)

80

60

40

20

0

Original execution time

Overhead of modifications

4 8 12 16 20 24 28

Number of nodes

Ñ Ñ"Ñ ²KšOœJÐ'«œ £>—F¬E¦Üšt« ¥„šZœÏ šO—FÓm«„Ð¥›—Bâ¡£¬+#ÙÓE¡Ç˜L›œÏ¡ ¡ ¤›šZÓ}¦Ï EšZ¦Jâ ¥ «„¡£¬Þ

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Execution time (seconds)

20

4

1

0.2

SOR

20 100 500 4000 64000

20

4

1

0.2

Water

500 2000 10000 64000

Execution time (seconds)

20

4

1

0.2

ASP

500 2000 10000 64000

Checkpoint size (KBytes)

20

4

1

0.2

TSP

500 2000 10000 64000

Checkpoint size (KBytes)

Et>.64$P:= !{hL¨3}¦©"Fa14|¦©¨3a¨3(&9x12¤,¦©¤>E¨2c2=Z4q6¤3¦©12¤[14r3¦($©HG0

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&'A¨3&Px12¤,¦=4o12?12&'¤k19(=T963©¦¦1F10-'I¦©¨3"M:J£¥¤[12+¦1F1%¦©¨¦0K

Execution time (seconds)

2.5

2

1.5

1

0.5

0

SOR

4 8 12 16 20 24 28

2.5

2

1.5

1

0.5

0

Water

4 8 12 16 20 24 28

Execution time (seconds)

2.5

2

1.5

1

0.5

0

ASP

4 8 12 16 20 24 28

Number of nodes

2.5

2

1.5

1

0.5

0

TSP

4 8 12 16 20 24 28

Number of nodes

Et>.64$P: B !bhL¨3T¦©"FT14t¦©¨3c¨3&Px12¤,¦©¤>E¨2c2RZ4o6¤3¦©12¤[14|¤,6"cx=14|¤31P

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Recovery time (seconds)

Recovery time (seconds)

90

50

20

10

SOR

5

10 100 1000 8000 64000

90

50

20

10

ASP

5

10 100 1000 8000 64000

Checkpoint size (KBytes)

90

50

20

10

Water

5

10 100 1000 8000 64000

90

50

20

10

TSP

5

10 100 1000 8000 64000

Checkpoint size (KBytes)

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Recovery time (seconds)

11

9

7

5

3

4 8 12 16 20 24 28

11

9

7

5

3

4 8 12 16 20 24 28

ASP

TSP

Recovery time (seconds)

11

9

7

5

3

4 8 12 16 20 24 28

Number of nodes

11

9

7

5

3

4 8 12 16 20 24 28

Number of nodes

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Execution time (%)

60

40

20

0

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