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#include "MemoryModel.h"
#include "include/compat.h"
#include "debug.h"
#if defined(__linux__)
#include <malloc.h>
#endif
#include <fstream>
#define dout_subsys ceph_subsys_
MemoryModel::MemoryModel(CephContext *cct_)
: cct(cct_)
{
}
void MemoryModel::_sample(snap *psnap)
{
ifstream f;
f.open(PROCPREFIX "/proc/self/status");
if (!f.is_open()) {
ldout(cct, 0) << "check_memory_usage unable to open " PROCPREFIX "/proc/self/status" << dendl;
return;
}
while (!f.eof()) {
string line;
getline(f, line);
if (strncmp(line.c_str(), "VmSize:", 7) == 0)
psnap->size = atol(line.c_str() + 7);
else if (strncmp(line.c_str(), "VmRSS:", 6) == 0)
psnap->rss = atol(line.c_str() + 7);
else if (strncmp(line.c_str(), "VmHWM:", 6) == 0)
psnap->hwm = atol(line.c_str() + 7);
else if (strncmp(line.c_str(), "VmLib:", 6) == 0)
psnap->lib = atol(line.c_str() + 7);
else if (strncmp(line.c_str(), "VmPeak:", 7) == 0)
psnap->peak = atol(line.c_str() + 7);
else if (strncmp(line.c_str(), "VmData:", 7) == 0)
psnap->data = atol(line.c_str() + 7);
}
f.close();
f.open(PROCPREFIX "/proc/self/maps");
if (!f.is_open()) {
ldout(cct, 0) << "check_memory_usage unable to open " PROCPREFIX "/proc/self/maps" << dendl;
return;
}
long heap = 0;
while (f.is_open() && !f.eof()) {
string line;
getline(f, line);
//ldout(cct, 0) << "line is " << line << dendl;
const char *start = line.c_str();
const char *dash = start;
while (*dash && *dash != '-') dash++;
if (!*dash)
continue;
const char *end = dash + 1;
while (*end && *end != ' ') end++;
if (!*end)
continue;
unsigned long long as = strtoll(start, 0, 16);
unsigned long long ae = strtoll(dash+1, 0, 16);
//ldout(cct, 0) << std::hex << as << " to " << ae << std::dec << dendl;
end++;
const char *mode = end;
int skip = 4;
while (skip--) {
end++;
while (*end && *end != ' ') end++;
}
if (*end)
end++;
long size = ae - as;
//ldout(cct, 0) << "size " << size << " mode is '" << mode << "' end is '" << end << "'" << dendl;
/*
* anything 'rw' and anon is assumed to be heap.
*/
if (mode[0] == 'r' && mode[1] == 'w' && !*end)
heap += size;
}
psnap->heap = heap >> 10;
}
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