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ex-gotcha
These examples demonstrate the use of GOTCHA wrappers by wrapping puts and MPI routines and then instrumenting them using timemory. The ex-gotcha-replacement demonstrates an example of replacing the STDLIB's exp function with a gotcha wrapped expf function.
Build
See examples. Further, these examples require timemory MPI and GOTCHA support to be enabled by enabling -DTIMEMORY_USE_GOTCHA=ON and -DTIMEMORY_USE_MPI=ON flags in timemory cmake build.
Expected Output
$ ./ex_gotcha
#------------------------- tim::manager initialized [id=0][pid=9347] -------------------------#
put gotcha is available: true
mpi gotcha is available: true
size = 1
rank = 0
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 511.47
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 510.71
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 499.13
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 511.18
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 501.40
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 487.90
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 507.49
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 511.22
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 512.39
Testing puts gotcha wraper...
[iterations=15]> single-precision exp = 1915398520832.000000
[iterations=15]> double-precision exp = 1915398474579.756592
[0]> sum = 511.55
[peak_rss]|0> Outputting 'timemory-ex-gotcha-output/peak_rss.json'...
[peak_rss]|0> Outputting 'timemory-ex-gotcha-output/peak_rss.txt'...
Opening 'timemory-ex-gotcha-output/peak_rss.jpeg' for output...
Closed 'timemory-ex-gotcha-output/peak_rss.jpeg'...
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| MEASURES CHANGES IN THE HIGH-WATER MARK FOR THE AMOUNT OF MEMORY ALLOCATED IN RAM. MAY FLUCTUATE IF SWAP IS ENABLED |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| LABEL | COUNT | DEPTH | METRIC | UNITS | SUM | MEAN | MIN | MAX | STDDEV | % SELF |
|-------------------------------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|
| >>> ./ex_gotcha | 10 | 0 | peak_rss | KB | 356.000000 | 35.600000 | 0.000000 | 356.000000 | 112.577085 | 100.0 |
| >>> |_Testing puts gotcha wraper... | 10 | 1 | peak_rss | KB | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.0 |
| >>> |_MPI_Barrier | 20 | 1 | peak_rss | KB | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.0 |
| >>> |_MPI_Allreduce | 10 | 1 | peak_rss | KB | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.0 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
[cpu]|0> Outputting 'timemory-ex-gotcha-output/cpu.flamegraph.json'...
[cpu]|0> Outputting 'timemory-ex-gotcha-output/cpu.json'...
[cpu]|0> Outputting 'timemory-ex-gotcha-output/cpu.txt'...
Opening 'timemory-ex-gotcha-output/cpu.jpeg' for output...
Closed 'timemory-ex-gotcha-output/cpu.jpeg'...
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| TOTAL CPU TIME SPENT IN BOTH USER- AND KERNEL-MODE |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| LABEL | COUNT | DEPTH | METRIC | UNITS | SUM | MEAN | MIN | MAX | STDDEV | % SELF |
|-------------------------------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|
| >>> ./ex_gotcha | 10 | 0 | cpu | msec | 10.000000 | 1.000000 | 0.000000 | 10.000000 | 3.162278 | 100.0 |
| >>> |_Testing puts gotcha wraper... | 10 | 1 | cpu | msec | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.0 |
| >>> |_MPI_Barrier | 20 | 1 | cpu | msec | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.0 |
| >>> |_MPI_Allreduce | 10 | 1 | cpu | msec | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 0.0 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
[wall]|0> Outputting 'timemory-ex-gotcha-output/wall.flamegraph.json'...
[wall]|0> Outputting 'timemory-ex-gotcha-output/wall.json'...
[wall]|0> Outputting 'timemory-ex-gotcha-output/wall.txt'...
Opening 'timemory-ex-gotcha-output/wall.jpeg' for output...
Closed 'timemory-ex-gotcha-output/wall.jpeg'...
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| REAL-CLOCK TIMER (I.E. WALL-CLOCK TIMER) |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| LABEL | COUNT | DEPTH | METRIC | UNITS | SUM | MEAN | MIN | MAX | STDDEV | % SELF |
|-------------------------------------|------------|------------|------------|------------|-------------|------------|------------|------------|------------|------------|
| >>> ./ex_gotcha | 10 | 0 | wall | msec | 5006.735103 | 500.673510 | 500.343106 | 503.562931 | 1.015317 | 100.0 |
| >>> |_Testing puts gotcha wraper... | 10 | 1 | wall | msec | 0.150961 | 0.015096 | 0.014567 | 0.016830 | 0.000715 | 100.0 |
| >>> |_MPI_Barrier | 20 | 1 | wall | msec | 0.097922 | 0.004896 | 0.002705 | 0.008961 | 0.001192 | 100.0 |
| >>> |_MPI_Allreduce | 10 | 1 | wall | msec | 0.179468 | 0.017947 | 0.014507 | 0.042923 | 0.008874 | 100.0 |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
[metadata::manager::finalize]> Outputting 'timemory-ex-gotcha-output/metadata.json'...
#---------------------- tim::manager destroyed [rank=0][id=0][pid=9347] ----------------------#