问题在于：
加速公式：S（p）= T（1）/ T（p）=（一个过程的平均时间/ p 过程的平均时间）
有5个日志，其中一个想要提取信息。 cg.B.1.log包含一个进程的执行时间，因此我们计算获得T（1）的平均时间。其他日志文件包含2,4,8和16个进程的执行时间。还必须计算这些时间的平均值，因为它们是T（p）。
以下是计算平均值的代码：
system "awk 'NR==1{n=$0} {print n/$0}' tavg.dat > speedup.dat;"
计算加速的代码：
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Start in 16:45:15--25/12/2014
NAS Parallel Benchmarks 3.3 -- CG Benchmark
Size: 75000
Iterations: 75
Number of active processes: 1
Number of nonzeroes per row: 13
Eigenvalue shift: .600E+02
iteration ||r|| zeta
1 0.30354859861452E-12 59.9994751578754
2 0.11186435488267E-14 21.7627846142536
3 0.11312258511928E-14 22.2876617043224
4 0.11222160585284E-14 22.5230738188346
5 0.11244234177219E-14 22.6275390653892
6 0.11330434819384E-14 22.6740259189533
7 0.11334259623050E-14 22.6949056826251
8 0.11374839313647E-14 22.7044023166872
9 0.11424877443039E-14 22.7087834345620
10 0.11329475190566E-14 22.7108351397177
11 0.11337364093482E-14 22.7118107121341
12 0.11379928308864E-14 22.7122816240971
13 0.11369453681794E-14 22.7125122663243
14 0.11430390337015E-14 22.7126268007594
15 0.11400318886400E-14 22.7126844161819
16 0.11352091331197E-14 22.7127137461755
17 0.11350923439124E-14 22.7127288402000
18 0.11475378864565E-14 22.7127366848296
19 0.11366777929028E-14 22.7127407981217
20 0.11274243312504E-14 22.7127429721364
21 0.11353930792856E-14 22.7127441294025
22 0.11299685800278E-14 22.7127447493900
23 0.11296405041170E-14 22.7127450834533
24 0.11381975597887E-14 22.7127452643881
25 0.11328127301663E-14 22.7127453628451
26 0.11367332658939E-14 22.7127454166517
27 0.11283372178605E-14 22.7127454461696
28 0.11384734158863E-14 22.7127454624211
29 0.11394011989719E-14 22.7127454713974
30 0.11354294067640E-14 22.7127454763703
31 0.11412988029103E-14 22.7127454791343
32 0.11358088407717E-14 22.7127454806740
33 0.11263266152515E-14 22.7127454815316
34 0.11275183080286E-14 22.7127454820131
35 0.11328306951409E-14 22.7127454822840
36 0.11357880314891E-14 22.7127454824349
37 0.11332687790488E-14 22.7127454825202
38 0.11324108818137E-14 22.7127454825684
39 0.11365065523777E-14 22.7127454825967
40 0.11361185361321E-14 22.7127454826116
41 0.11276519820716E-14 22.7127454826202
42 0.11317183424878E-14 22.7127454826253
43 0.11236007481770E-14 22.7127454826276
44 0.11304065564684E-14 22.7127454826296
45 0.11287791356431E-14 22.7127454826310
46 0.11297028000133E-14 22.7127454826310
47 0.11281236869666E-14 22.7127454826314
48 0.11277254075548E-14 22.7127454826317
49 0.11320327289847E-14 22.7127454826309
50 0.11287655285563E-14 22.7127454826321
51 0.11230503422400E-14 22.7127454826324
52 0.11292089094944E-14 22.7127454826313
53 0.11366728396408E-14 22.7127454826315
54 0.11222618466968E-14 22.7127454826310
55 0.11278193276516E-14 22.7127454826315
56 0.11244624896030E-14 22.7127454826316
57 0.11264508872685E-14 22.7127454826318
58 0.11255583774760E-14 22.7127454826314
59 0.11227129146723E-14 22.7127454826314
60 0.11189480800173E-14 22.7127454826318
61 0.11163241472678E-14 22.7127454826315
62 0.11278839424218E-14 22.7127454826318
63 0.11226804133008E-14 22.7127454826313
64 0.11222456601361E-14 22.7127454826317
65 0.11270879524310E-14 22.7127454826308
66 0.11303771390006E-14 22.7127454826319
67 0.11240101357287E-14 22.7127454826319
68 0.11240278884391E-14 22.7127454826321
69 0.11207748067718E-14 22.7127454826317
70 0.11178755187571E-14 22.7127454826327
71 0.11195935245649E-14 22.7127454826313
72 0.11260715126337E-14 22.7127454826322
73 0.11281677964997E-14 22.7127454826316
74 0.11162340034815E-14 22.7127454826318
75 0.11208709203921E-14 22.7127454826310
Benchmark completed
VERIFICATION SUCCESSFUL
Zeta is 0.2271274548263E+02
Error is 0.3128387698896E-15
CG Benchmark Completed.
Class = B
Size = 75000
Iterations = 75
Time in seconds = 88.72
Total processes = 1
Compiled procs = 1
Mop/s total = 616.64
Mop/s/process = 616.64
Operation type = floating point
Verification = SUCCESSFUL
Version = 3.3
Compile date = 25 Dec 2014
Compile options:
MPIF77 = mpif77
FLINK = $(MPIF77)
FMPI_LIB = -L/usr/lib/openmpi/lib -lmpi -lopen-rte -lo...
FMPI_INC = -I/usr/lib/openmpi/include -I/usr/lib/openm...
FFLAGS = -O
FLINKFLAGS = -O
RAND = randi8
Please send the results of this run to:
NPB Development Team
Internet: npb@nas.nasa.gov
If email is not available, send this to:
MS T27A-1
NASA Ames Research Center
Moffett Field, CA 94035-1000
Fax: 650-604-3957
Finish in 16:46:46--25/12/2014
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Start in 17:03:13--25/12/2014
NAS Parallel Benchmarks 3.3 -- CG Benchmark
Size: 75000
Iterations: 75
Number of active processes: 1
Number of nonzeroes per row: 13
Eigenvalue shift: .600E+02
iteration ||r|| zeta
1 0.30354859861452E-12 59.9994751578754
2 0.11186435488267E-14 21.7627846142536
3 0.11312258511928E-14 22.2876617043224
4 0.11222160585284E-14 22.5230738188346
5 0.11244234177219E-14 22.6275390653892
6 0.11330434819384E-14 22.6740259189533
7 0.11334259623050E-14 22.6949056826251
8 0.11374839313647E-14 22.7044023166872
9 0.11424877443039E-14 22.7087834345620
10 0.11329475190566E-14 22.7108351397177
11 0.11337364093482E-14 22.7118107121341
12 0.11379928308864E-14 22.7122816240971
13 0.11369453681794E-14 22.7125122663243
14 0.11430390337015E-14 22.7126268007594
15 0.11400318886400E-14 22.7126844161819
16 0.11352091331197E-14 22.7127137461755
17 0.11350923439124E-14 22.7127288402000
18 0.11475378864565E-14 22.7127366848296
19 0.11366777929028E-14 22.7127407981217
20 0.11274243312504E-14 22.7127429721364
21 0.11353930792856E-14 22.7127441294025
22 0.11299685800278E-14 22.7127447493900
23 0.11296405041170E-14 22.7127450834533
24 0.11381975597887E-14 22.7127452643881
25 0.11328127301663E-14 22.7127453628451
26 0.11367332658939E-14 22.7127454166517
27 0.11283372178605E-14 22.7127454461696
28 0.11384734158863E-14 22.7127454624211
29 0.11394011989719E-14 22.7127454713974
30 0.11354294067640E-14 22.7127454763703
31 0.11412988029103E-14 22.7127454791343
32 0.11358088407717E-14 22.7127454806740
33 0.11263266152515E-14 22.7127454815316
34 0.11275183080286E-14 22.7127454820131
35 0.11328306951409E-14 22.7127454822840
36 0.11357880314891E-14 22.7127454824349
37 0.11332687790488E-14 22.7127454825202
38 0.11324108818137E-14 22.7127454825684
39 0.11365065523777E-14 22.7127454825967
40 0.11361185361321E-14 22.7127454826116
41 0.11276519820716E-14 22.7127454826202
42 0.11317183424878E-14 22.7127454826253
43 0.11236007481770E-14 22.7127454826276
44 0.11304065564684E-14 22.7127454826296
45 0.11287791356431E-14 22.7127454826310
46 0.11297028000133E-14 22.7127454826310
47 0.11281236869666E-14 22.7127454826314
48 0.11277254075548E-14 22.7127454826317
49 0.11320327289847E-14 22.7127454826309
50 0.11287655285563E-14 22.7127454826321
51 0.11230503422400E-14 22.7127454826324
52 0.11292089094944E-14 22.7127454826313
53 0.11366728396408E-14 22.7127454826315
54 0.11222618466968E-14 22.7127454826310
55 0.11278193276516E-14 22.7127454826315
56 0.11244624896030E-14 22.7127454826316
57 0.11264508872685E-14 22.7127454826318
58 0.11255583774760E-14 22.7127454826314
59 0.11227129146723E-14 22.7127454826314
60 0.11189480800173E-14 22.7127454826318
61 0.11163241472678E-14 22.7127454826315
62 0.11278839424218E-14 22.7127454826318
63 0.11226804133008E-14 22.7127454826313
64 0.11222456601361E-14 22.7127454826317
65 0.11270879524310E-14 22.7127454826308
66 0.11303771390006E-14 22.7127454826319
67 0.11240101357287E-14 22.7127454826319
68 0.11240278884391E-14 22.7127454826321
69 0.11207748067718E-14 22.7127454826317
70 0.11178755187571E-14 22.7127454826327
71 0.11195935245649E-14 22.7127454826313
72 0.11260715126337E-14 22.7127454826322
73 0.11281677964997E-14 22.7127454826316
74 0.11162340034815E-14 22.7127454826318
75 0.11208709203921E-14 22.7127454826310
Benchmark completed
VERIFICATION SUCCESSFUL
Zeta is 0.2271274548263E+02
Error is 0.3128387698896E-15
CG Benchmark Completed.
Class = B
Size = 75000
Iterations = 75
Time in seconds = 87.47
Total processes = 1
Compiled procs = 1
Mop/s total = 625.43
Mop/s/process = 625.43
Operation type = floating point
Verification = SUCCESSFUL
Version = 3.3
Compile date = 25 Dec 2014
Compile options:
MPIF77 = mpif77
FLINK = $(MPIF77)
FMPI_LIB = -L/usr/lib/openmpi/lib -lmpi -lopen-rte -lo...
FMPI_INC = -I/usr/lib/openmpi/include -I/usr/lib/openm...
FFLAGS = -O
FLINKFLAGS = -O
RAND = randi8
Please send the results of this run to:
NPB Development Team
Internet: npb@nas.nasa.gov
If email is not available, send this to:
MS T27A-1
NASA Ames Research Center
Moffett Field, CA 94035-1000
Fax: 650-604-3957
Finish in 17:04:43--25/12/2014
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如何组合这两个命令，以便输出＆＃39; speedup.dat＆＃39;直接生成而不使用文件 tavg.dat ？
以下是文件的内容，所有日志文件的结构完全相同。为了缩写的目的，我只附加了前两个执行。
cg.B.1.log
88.3055
45.1482
37.7202
37.4035
53.777
tavg.dat
1
1.9559
2.34107
2.36089
1.64207
speedup.dat
<AppBarLayout>
<CollapsingToolbarLayout>
<ImageView/>
<Toolbar/>
</CollapsingToolbarLayout>
</AppBarLayout>
<android.support.v4.widget.NestedScrollView/> <!-- content here -->
答案 0 :(得分：1)
您可以在一个处理所有日志文件的awk脚本中完成所有操作：
#!/usr/bin/awk -f
BEGIN { FS="=" }
lfname != FILENAME { lfname = FILENAME; split(FILENAME, a, "."); fnum=a[3] }
/Time in seconds/ { tsecs[fnum] += $2; tcnt[fnum]++ }
/Total processes/ { cp[fnum] = int($2) }
END {
tavg1 = tsecs[1]/tcnt[1]
for( k in tsecs ) {
tavgk = tsecs[k]/tcnt[k]
if( tavgk > 0 ) {
print k OFS cp[k] OFS tavgk OFS tavg1/tavgk
}
}
}
如果你把它放在一个名为awk.script的文件中并使其chmod +x awk.script可执行，你可以在bash中运行它，如：
./awk.script cg.B.*.log
如果您正在使用GNU awk，则会对输出进行排序（可能需要额外的步骤以确保使用其他awk风格订购输出。）
在我生成第2和第3个文件的地方，输出如下：
1 1 88.095 1
2 2 68.095 1.29371
3 4 49.595 1.77629
其中未命名的列类似于：file number，# processes，avg per file，speedup。您可以通过将END块中的打印更改为print tavg1/tavgk来获得加速。
以下是剧本的细分：
BEGIN lfname != FILENAME - 将文件名中的文件编号解析为fnum，但仅在FILENAME更改时解析。/Time in seconds/ - 使用tsecs键将值存储在tcnt和fnum数组中。使用int()函数从进程值中去除空格。/Total processes/ - 使用cp键将流程存储在fnum数组中END - 计算fnum 1的平均值tavg1，循环显示tsecs中的键，并按fnum键计算平均值{{ 1}}。当tavgk按上述方式打印输出时。答案 1 :(得分：0)
你已经找到了所有困难的部分。您根本不需要tavg.dat文件。直接创建tavg(n)函数作为系统调用：
tavg(n) = system("awk 'BEGIN { FS = \"[ \\t]*=[ \\t]*\" } \
/Time in seconds/ { s += $2; c++ } /Total processes/ { \
if (! CP) CP = $2 } END { print s/c }' cg.B.".n.".log")
speedup(n)函数
speedup(n)=tavg(n)/tavg(1)
现在您可以set print写入文件：
set print "speedup.dat"
do for [i=1:5] {
print speedup(i)
}
unset print