1 //===-- ProcfsTests.cpp ---------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "Procfs.h"
10 
11 #include "lldb/Host/linux/Support.h"
12 
13 #include "gmock/gmock.h"
14 #include "gtest/gtest.h"
15 
16 using namespace lldb_private;
17 using namespace process_linux;
18 using namespace llvm;
19 
20 TEST(Perf, HardcodedLogicalCoreIDs) {
21   Expected<std::vector<lldb::core_id_t>> core_ids =
22       GetAvailableLogicalCoreIDs(R"(processor       : 13
23 vendor_id       : GenuineIntel
24 cpu family      : 6
25 model           : 85
26 model name      : Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz
27 stepping        : 4
28 microcode       : 0x2000065
29 cpu MHz         : 2886.370
30 cache size      : 28160 KB
31 physical id     : 1
32 siblings        : 40
33 core id         : 19
34 cpu cores       : 20
35 apicid          : 103
36 initial apicid  : 103
37 fpu             : yes
38 fpu_exception   : yes
39 cpuid level     : 22
40 power management:
41 
42 processor       : 24
43 vendor_id       : GenuineIntel
44 cpu family      : 6
45 model           : 85
46 model name      : Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz
47 stepping        : 4
48 microcode       : 0x2000065
49 cpu MHz         : 2768.494
50 cache size      : 28160 KB
51 physical id     : 1
52 siblings        : 40
53 core id         : 20
54 cpu cores       : 20
55 apicid          : 105
56 power management:
57 
58 processor       : 35
59 vendor_id       : GenuineIntel
60 cpu family      : 6
61 model           : 85
62 model name      : Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz
63 stepping        : 4
64 microcode       : 0x2000065
65 cpu MHz         : 2884.703
66 cache size      : 28160 KB
67 physical id     : 1
68 siblings        : 40
69 core id         : 24
70 cpu cores       : 20
71 apicid          : 113
72 
73 processor       : 79
74 vendor_id       : GenuineIntel
75 cpu family      : 6
76 model           : 85
77 model name      : Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz
78 stepping        : 4
79 microcode       : 0x2000065
80 cpu MHz         : 3073.955
81 cache size      : 28160 KB
82 physical id     : 1
83 siblings        : 40
84 core id         : 28
85 cpu cores       : 20
86 apicid          : 121
87 power management:
88 )");
89 
90   ASSERT_TRUE((bool)core_ids);
91   ASSERT_THAT(*core_ids, ::testing::ElementsAre(13, 24, 35, 79));
92 }
93 
94 TEST(Perf, RealLogicalCoreIDs) {
95   // We first check we can read /proc/cpuinfo
96   auto buffer_or_error = errorOrToExpected(getProcFile("cpuinfo"));
97   if (!buffer_or_error)
98     GTEST_SKIP() << toString(buffer_or_error.takeError());
99 
100   // At this point we shouldn't fail parsing the core ids
101   Expected<ArrayRef<lldb::core_id_t>> core_ids = GetAvailableLogicalCoreIDs();
102   ASSERT_TRUE((bool)core_ids);
103   ASSERT_GT((int)core_ids->size(), 0) << "We must see at least one core";
104 }
105