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Perf docs update #2468

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merged 2 commits into from
Jan 27, 2017
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Perf docs update #2468

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d5f5383
Correcting performance counter documentation.
aserio Jan 27, 2017
b1139b1
Making it look pretty.
aserio Jan 27, 2017
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15 changes: 14 additions & 1 deletion docs/manual/consuming_performance_counters.qbk
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Original file line number Diff line number Diff line change
Expand Up @@ -350,11 +350,24 @@ called:
// print the current number of threads created on locality 0
hpx::performance_counters::performance_counter count(
"/threads{locality#0/total}/count/cumulative");
hpx::cout << count.get_value<int>() << hpx::endl;
hpx::cout << count.get_value<int>().get() << hpx::endl;

For more information about the client component type see
[classref hpx::performance_counters::performance_counter].

[note In the above example count.get_value() returns a future. In order
to print the result we must append .get() to retrieve the value. You
could write the above example like this for more clarity:

```
// print the current number of threads created on locality 0
hpx::performance_counters::performance_counter count(
"/threads{locality#0/total}/count/cumulative");
hpx::future<int> result = count.get_value<int>();
hpx::cout << result.get() << hpx::endl;
```
]

[endsect]

[endsect] [/ Consuming Performance Counter Data]
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