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Account unreclaimable slab and shmem as used memory, 

reclaimable slab as cached memory.

Hopefully this presents a more truthful representation of
available vs. used memory on Linux.
See brndnmtthws/conky#82, #242, #67, #263.
This commit is contained in:
Hisham Muhammad 2015-11-28 22:22:00 -02:00
parent d34645f8f1
commit 5bc1f5ed04
1 changed files with 27 additions and 15 deletions
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42
linux/LinuxProcessList.c
View File

@ -621,6 +621,9 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, const char*
static inline void LinuxProcessList_scanMemoryInfo(ProcessList* this) {
unsigned long long int swapFree = 0;
unsigned long long int slab = 0;
unsigned long long int shmem = 0;
unsigned long long int sreclaimable = 0;
FILE* file = fopen(PROCMEMINFOFILE, "r");
if (file == NULL) {
@ -629,33 +632,42 @@ static inline void LinuxProcessList_scanMemoryInfo(ProcessList* this) {
char buffer[128];
while (fgets(buffer, 128, file)) {
#define tryRead(label, variable) (String_startsWith(buffer, label) && sscanf(buffer + strlen(label), " %32llu kB", variable))
switch (buffer[0]) {
case 'M':
if (String_startsWith(buffer, "MemTotal:"))
sscanf(buffer, "MemTotal: %32llu kB", &this->totalMem);
else if (String_startsWith(buffer, "MemFree:"))
sscanf(buffer, "MemFree: %32llu kB", &this->freeMem);
else if (String_startsWith(buffer, "MemShared:"))
sscanf(buffer, "MemShared: %32llu kB", &this->sharedMem);
if (tryRead("MemTotal:", &this->totalMem)) {}
else if (tryRead("MemFree:", &this->freeMem)) {}
else if (tryRead("MemShared:", &this->sharedMem)) {}
break;
case 'B':
if (String_startsWith(buffer, "Buffers:"))
sscanf(buffer, "Buffers: %32llu kB", &this->buffersMem);
if (tryRead("Buffers:", &this->buffersMem)) {}
break;
case 'C':
if (String_startsWith(buffer, "Cached:"))
sscanf(buffer, "Cached: %32llu kB", &this->cachedMem);
if (tryRead("Cached:", &this->cachedMem)) {}
break;
case 'S':
if (String_startsWith(buffer, "SwapTotal:"))
sscanf(buffer, "SwapTotal: %32llu kB", &this->totalSwap);
if (String_startsWith(buffer, "SwapFree:"))
sscanf(buffer, "SwapFree: %32llu kB", &swapFree);
switch (buffer[1]) {
case 'w':
if (tryRead("SwapTotal:", &this->totalSwap)) {}
else if (tryRead("SwapFree:", &swapFree)) {}
break;
case 'l':
if (tryRead("Slab:", &slab)) {}
break;
case 'h':
if (tryRead("Shmem:", &shmem)) {}
break;
case 'R':
if (tryRead("SReclaimable:", &sreclaimable)) {}
break;
}
break;
}
#undef tryRead
}
this->usedMem = this->totalMem - this->freeMem;
this->usedMem = this->totalMem - this->freeMem + (slab - sreclaimable) + shmem;
this->cachedMem = this->cachedMem + sreclaimable;
this->usedSwap = this->totalSwap - swapFree;
fclose(file);
}