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// Unlike most get* functions, this one does the rendering too.
// as such it returns a list of rows like any other render* function
// that is called by mainLoop()
vector <vector <string> > getMeminfo(bool perSecond, bool showTotals, bool showRealMemFree, bool humanizeNums,
const double &elapsed)
{
vector <string> lines = readFile(string("/proc/meminfo"));
static uint64_t oldMemFree = 0, oldMemTotal = 0, oldSwapTotal = 0, oldSwapFree = 0;
static uint64_t oldCache = 0, oldBuffers = 0;
// these have identical names to the keys in meminfo
int64_t MemTotal = 0, MemFree = 0, Buffers = 0, SwapTotal = 0, SwapFree = 0;
int64_t MemTotalDiff = 0, MemFreeDiff = 0, BuffersDiff = 0, SwapTotalDiff = 0, SwapFreeDiff = 0;
int64_t Cache = 0, CacheDiff = 0;
for(uint32_t i = 0; i < lines.size(); i++) {
vector <string> tokens = splitString(" ", lines[i]);
if (!tokens.size()) break;
if(tokens[0] == "MemTotal:") {
MemTotal = string2int64(tokens[1]);
MemTotalDiff = (showTotals ? MemTotal : MemTotal - oldMemTotal);
oldMemTotal = MemTotal;
} else if(tokens[0] == "MemFree:") {
MemFree = string2int64(tokens[1]);
MemFreeDiff = (showTotals ? MemFree : MemFree - oldMemFree);
oldMemFree = MemFree;
} else if(tokens[0] == "Buffers:") {
Buffers = string2int64(tokens[1]);
BuffersDiff = (showTotals ? Buffers : Buffers - oldBuffers);
oldBuffers = Buffers;
} else if(tokens[0] == "Cached:") {
Cache = string2int64(tokens[1]);
CacheDiff = (showTotals ? Cache : Cache - oldCache);
oldCache = Cache;
} else if(tokens[0] == "SwapTotal:") {
SwapTotal = string2int64(tokens[1]);
SwapTotalDiff = (showTotals ? SwapTotal : SwapTotal - oldSwapTotal);
oldSwapTotal = SwapTotal;
} else if(tokens[0] == "SwapFree:") {
SwapFree = string2int64(tokens[1]);
SwapFreeDiff = (showTotals ? SwapFree : SwapFree - oldSwapFree);
oldSwapFree = SwapFree;
}
}
vector <vector <string> > rows;
vector <string> row;
row.push_back("Memory:");
row.push_back("Total");
row.push_back("Used");
row.push_back("Free");
row.push_back("Buffers");
rows.push_back(row);
row.clear();
row.push_back("RAM:");
if(humanizeNums) {
row.push_back(humanizeBigNums(int64_t(MemTotalDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed))) << 10 ));
row.push_back(humanizeBigNums(int64_t((MemTotalDiff - MemFreeDiff) /
(!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed))) << 10 ));
row.push_back(humanizeBigNums(int64_t(MemFreeDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed))) << 10 ));
row.push_back(humanizeBigNums(int64_t(BuffersDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed))) << 10 ));
} else {
row.push_back(int64toString(int64_t(MemTotalDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)))));
row.push_back(int64toString(int64_t((MemTotalDiff - MemFreeDiff) /
(!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)))));
row.push_back(int64toString(int64_t(MemFreeDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)))));
row.push_back(int64toString(int64_t(BuffersDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)))));
}
rows.push_back(row);
row.clear();
if(showRealMemFree) { // Produces free memory figures that consider Buffers + Cache as disposable.
int64_t BuffCacheUsed = int64_t(((BuffersDiff + CacheDiff)) /
(!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)));
int64_t BuffCacheFree = int64_t((MemFreeDiff + (BuffersDiff + CacheDiff)) / (
!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)));
row.push_back("-/+ buffers/cache ");
row.push_back("");
if(humanizeNums) {
row.push_back(humanizeBigNums(BuffCacheUsed << 10 ));
row.push_back(humanizeBigNums(BuffCacheFree << 10 ));
} else {
row.push_back(int64toString(BuffCacheUsed));
row.push_back(int64toString(BuffCacheFree));
}
rows.push_back(row);
row.clear();
}
row.push_back("Swap:");
if(humanizeNums) {
row.push_back(humanizeBigNums(int64_t(SwapTotalDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed))) << 10 ));
row.push_back(humanizeBigNums(int64_t((SwapTotalDiff - SwapFreeDiff) /
(!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed))) << 10 ));
row.push_back(humanizeBigNums(int64_t(SwapFreeDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed))) << 10 ));
} else {
row.push_back(int64toString(int64_t(SwapTotalDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)))));
row.push_back(int64toString(int64_t((SwapTotalDiff - SwapFreeDiff) /
(!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)))));
row.push_back(int64toString(int64_t(SwapFreeDiff / (!perSecond || elapsed == 0 ? 1 : (showTotals ? 1 : elapsed)))));
}
rows.push_back(row);
row.clear();
return rows;
}
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