1 /*
2     Copyright (c) 2005-2021 Intel Corporation
3 
4     Licensed under the Apache License, Version 2.0 (the "License");
5     you may not use this file except in compliance with the License.
6     You may obtain a copy of the License at
7 
8         http://www.apache.org/licenses/LICENSE-2.0
9 
10     Unless required by applicable law or agreed to in writing, software
11     distributed under the License is distributed on an "AS IS" BASIS,
12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13     See the License for the specific language governing permissions and
14     limitations under the License.
15 */
16 
17 #include <cstdlib>
18 #include <cstdio>
19 #include <cstring>
20 #include <cctype>
21 
22 #include <utility>
23 #include <iostream>
24 #include <sstream>
25 
26 #include "oneapi/tbb/tick_count.h"
27 
28 #include "common/utility/utility.hpp"
29 
30 #include "primes.hpp"
31 
32 struct RunOptions {
33     //! NumberType of threads to use.
34     utility::thread_number_range threads;
35     //whether to suppress additional output
36     bool silentFlag;
37     //
38     NumberType n;
39     //! Grain size parameter
40     NumberType grainSize;
41     // number of time to repeat calculation
42     NumberType repeatNumber;
43 
44     RunOptions(utility::thread_number_range threads_,
45                NumberType grainSize_,
46                NumberType n_,
47                bool silentFlag_,
48                NumberType repeatNumber_)
49             : threads(threads_),
50               silentFlag(silentFlag_),
51               n(n_),
52               grainSize(grainSize_),
53               repeatNumber(repeatNumber_) {}
54 };
55 
56 //! Parse the command line.
57 static RunOptions ParseCommandLine(int argc, char* argv[]) {
58     utility::thread_number_range threads(
59         utility::get_default_num_threads, 0, utility::get_default_num_threads());
60     NumberType grainSize = 1000;
61     bool silent = false;
62     NumberType number = 100000000;
63     NumberType repeatNumber = 1;
64 
65     utility::parse_cli_arguments(
66         argc,
67         argv,
68         utility::cli_argument_pack()
69             //"-h" option for displaying help is present implicitly
70             .positional_arg(threads, "n-of-threads", utility::thread_number_range_desc)
71             .positional_arg(number,
72                             "number",
73                             "upper bound of range to search primes in, must be a positive integer")
74             .positional_arg(grainSize, "grain-size", "must be a positive integer")
75             .positional_arg(
76                 repeatNumber,
77                 "n-of-repeats",
78                 "repeat the calculation this number of times, must be a positive integer")
79             .arg(silent, "silent", "no output except elapsed time"));
80 
81     RunOptions options(threads, grainSize, number, silent, repeatNumber);
82     return options;
83 }
84 
85 int main(int argc, char* argv[]) {
86     oneapi::tbb::tick_count mainBeginMark = oneapi::tbb::tick_count::now();
87     RunOptions options = ParseCommandLine(argc, argv);
88 
89     // Try different numbers of threads
90     for (int p = options.threads.first; p <= options.threads.last; p = options.threads.step(p)) {
91         for (NumberType i = 0; i < options.repeatNumber; ++i) {
92             oneapi::tbb::tick_count iterationBeginMark = oneapi::tbb::tick_count::now();
93             NumberType count = 0;
94             NumberType n = options.n;
95             if (p == 0) {
96                 count = SerialCountPrimes(n);
97             }
98             else {
99                 NumberType grainSize = options.grainSize;
100                 count = ParallelCountPrimes(n, p, grainSize);
101             }
102             oneapi::tbb::tick_count iterationEndMark = oneapi::tbb::tick_count::now();
103             if (!options.silentFlag) {
104                 std::cout << "#primes from [2.." << options.n << "] = " << count << " ("
105                           << (iterationEndMark - iterationBeginMark).seconds() << " sec with ";
106                 if (0 != p)
107                     std::cout << p << "-way parallelism";
108                 else
109                     std::cout << "serial code";
110                 std::cout << ")\n";
111             }
112         }
113     }
114     utility::report_elapsed_time((oneapi::tbb::tick_count::now() - mainBeginMark).seconds());
115     return 0;
116 }
117