gem5  v21.1.0.2
hostinfo.cc
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1 /*
2  * Copyright (c) 2003-2005 The Regents of The University of Michigan
3  * All rights reserved.
4  *
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8  * notice, this list of conditions and the following disclaimer;
9  * redistributions in binary form must reproduce the above copyright
10  * notice, this list of conditions and the following disclaimer in the
11  * documentation and/or other materials provided with the distribution;
12  * neither the name of the copyright holders nor the names of its
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14  * this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include "base/hostinfo.hh"
30 
31 #ifdef __APPLE__
32 #include <mach/mach_init.h>
33 #include <mach/shared_region.h>
34 #include <mach/task.h>
35 #else
36 #include <cstdio>
37 #endif
38 
39 #include "base/logging.hh"
40 #include "base/str.hh"
41 
42 namespace gem5
43 {
44 
45 #ifndef __APPLE__
46 uint64_t
47 procInfo(const char *filename, const char *target)
48 {
49  int done = 0;
50  char line[80];
51  char format[80];
52  long usage;
53 
54  FILE *fp = fopen(filename, "r");
55 
56  while (fp && !feof(fp) && !done) {
57  if (fgets(line, 80, fp)) {
58  if (startswith(line, target)) {
59  snprintf(format, sizeof(format), "%s %%ld", target);
60  sscanf(line, format, &usage);
61 
62  fclose(fp);
63  return usage;
64  }
65  }
66  }
67 
68  if (fp)
69  fclose(fp);
70 
71  return 0;
72 }
73 #endif
74 
75 uint64_t
77 {
78 // For the Mach-based Darwin kernel, use the task_info of the self task
79 #ifdef __APPLE__
80  struct task_basic_info t_info;
81  mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
82 
83  if (KERN_SUCCESS != task_info(mach_task_self(),
84  TASK_BASIC_INFO, (task_info_t)&t_info,
85  &t_info_count)) {
86  return 0;
87  }
88 
89  // Mimic Darwin's implementation of top and subtract
90  // SHARED_REGION_SIZE from the tasks virtual size to account for the
91  // shared memory submap that is incorporated into every process.
92  return (t_info.virtual_size - SHARED_REGION_SIZE) / 1024;
93 #else
94  // Linux implementation
95  return procInfo("/proc/self/status", "VmSize:");
96 #endif
97 }
98 
99 } // namespace gem5
gem5::ArmISA::format
Bitfield< 31, 29 > format
Definition: misc_types.hh:646
gem5::startswith
bool startswith(const char *s, const char *prefix)
Return true if 's' starts with the prefix string 'prefix'.
Definition: str.hh:242
gem5::ArmISA::fp
Bitfield< 19, 16 > fp
Definition: misc_types.hh:176
str.hh
gem5::memUsage
uint64_t memUsage()
Determine the simulator process' total virtual memory usage.
Definition: hostinfo.cc:76
hostinfo.hh
logging.hh
gem5::procInfo
uint64_t procInfo(const char *filename, const char *target)
Definition: hostinfo.cc:47
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40

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