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Linux: overhaul memory partition

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Use similar calculation than procps.
Show AvailableMemory in text mode.
Use total minus available memory instead of manually computed used-
memory as fraction part in bar mode (if available).
This commit is contained in:
Christian Göttsche 2021-01-06 18:11:24 +01:00
parent 0d67263b36
commit 3d497a3760
7 changed files with 103 additions and 63 deletions
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23
MemoryMeter.c
View File

@ -7,6 +7,8 @@ in the source distribution for its full text.
#include "MemoryMeter.h"
#include <math.h>
#include "CRT.h"
#include "Object.h"
#include "Platform.h"
@ -21,9 +23,15 @@ static const int MemoryMeter_attributes[] = {
static void MemoryMeter_updateValues(Meter* this, char* buffer, size_t size) {
int written;
/* available memory is not supported on all platforms */
this->values[3] = NAN;
Platform_setMemoryValues(this);
written = Meter_humanUnit(buffer, this->values[0], size);
/* Do not print available memory in bar mode */
this->curItems = 3;
written = Meter_humanUnit(buffer, isnan(this->values[3]) ? this->values[0] : this->total - this->values[3], size);
METER_BUFFER_CHECK(buffer, size, written);
METER_BUFFER_APPEND_CHR(buffer, size, '/');
@ -34,18 +42,29 @@ static void MemoryMeter_updateValues(Meter* this, char* buffer, size_t size) {
static void MemoryMeter_display(const Object* cast, RichString* out) {
char buffer[50];
const Meter* this = (const Meter*)cast;
RichString_writeAscii(out, CRT_colors[METER_TEXT], ":");
Meter_humanUnit(buffer, this->total, sizeof(buffer));
RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
Meter_humanUnit(buffer, this->values[0], sizeof(buffer));
RichString_appendAscii(out, CRT_colors[METER_TEXT], " used:");
RichString_appendAscii(out, CRT_colors[MEMORY_USED], buffer);
Meter_humanUnit(buffer, this->values[1], sizeof(buffer));
RichString_appendAscii(out, CRT_colors[METER_TEXT], " buffers:");
RichString_appendAscii(out, CRT_colors[MEMORY_BUFFERS_TEXT], buffer);
Meter_humanUnit(buffer, this->values[2], sizeof(buffer));
RichString_appendAscii(out, CRT_colors[METER_TEXT], " cache:");
RichString_appendAscii(out, CRT_colors[MEMORY_CACHE], buffer);
/* available memory is not supported on all platforms */
if (!isnan(this->values[3])) {
Meter_humanUnit(buffer, this->values[3], sizeof(buffer));
RichString_appendAscii(out, CRT_colors[METER_TEXT], " available:");
RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
}
}
const MeterClass MemoryMeter_class = {
@ -56,7 +75,7 @@ const MeterClass MemoryMeter_class = {
},
.updateValues = MemoryMeter_updateValues,
.defaultMode = BAR_METERMODE,
.maxItems = 3,
.maxItems = 4,
.total = 100.0,
.attributes = MemoryMeter_attributes,
.name = "Memory",

18
ProcessList.h
View File

@ -34,6 +34,9 @@ in the source distribution for its full text.
#define MAX_READ 2048
#endif
typedef unsigned long long int memory_t;
#define MEMORY_MAX ULLONG_MAX
typedef struct ProcessList_ {
const Settings* settings;
@ -61,14 +64,15 @@ typedef struct ProcessList_ {
int userlandThreads;
int kernelThreads;
unsigned long long int totalMem;
unsigned long long int usedMem;
unsigned long long int buffersMem;
unsigned long long int cachedMem;
memory_t totalMem;
memory_t usedMem;
memory_t buffersMem;
memory_t cachedMem;
memory_t availableMem;
unsigned long long int totalSwap;
unsigned long long int usedSwap;
unsigned long long int cachedSwap;
memory_t totalSwap;
memory_t usedSwap;
memory_t cachedSwap;
int cpuCount;

6
linux/HugePageMeter.c
View File

@ -35,7 +35,7 @@ static void HugePageMeter_updateValues(Meter* this, char* buffer, size_t size) {
assert(ARRAYSIZE(HugePageMeter_labels) == HTOP_HUGEPAGE_COUNT);
int written;
unsigned long long int usedTotal = 0;
memory_t usedTotal = 0;
unsigned nextUsed = 0;
const LinuxProcessList* lpl = (const LinuxProcessList*) this->pl;
@ -47,8 +47,8 @@ static void HugePageMeter_updateValues(Meter* this, char* buffer, size_t size) {
HugePageMeter_active_labels[i] = NULL;
}
for (unsigned i = 0; i < HTOP_HUGEPAGE_COUNT; i++) {
unsigned long long int value = lpl->usedHugePageMem[i];
if (value != ULLONG_MAX) {
memory_t value = lpl->usedHugePageMem[i];
if (value != MEMORY_MAX) {
this->values[nextUsed] = value;
usedTotal += value;
HugePageMeter_active_labels[nextUsed] = HugePageMeter_labels[i];

94
linux/LinuxProcessList.c
View File

@ -1525,64 +1525,82 @@ errorReadingProcess:
}
static inline void LinuxProcessList_scanMemoryInfo(ProcessList* this) {
unsigned long long int freeMem = 0;
unsigned long long int swapFree = 0;
unsigned long long int shmem = 0;
unsigned long long int sreclaimable = 0;
memory_t availableMem = 0;
memory_t freeMem = 0;
memory_t totalMem = 0;
memory_t buffersMem = 0;
memory_t cachedMem = 0;
memory_t swapTotalMem = 0;
memory_t swapCacheMem = 0;
memory_t swapFreeMem = 0;
memory_t sreclaimableMem = 0;
FILE* file = fopen(PROCMEMINFOFILE, "r");
if (file == NULL) {
if (!file)
CRT_fatalError("Cannot open " PROCMEMINFOFILE);
}
char buffer[128];
while (fgets(buffer, 128, file)) {
#define tryRead(label, variable) \
if (String_startsWith(buffer, label)) { \
sscanf(buffer + strlen(label), " %32llu kB", variable); \
break; \
char buffer[128];
while (fgets(buffer, sizeof(buffer), file)) {
#define tryRead(label, variable) \
if (String_startsWith(buffer, label)) { \
memory_t parsed_; \
if (sscanf(buffer + strlen(label), "%llu kB", &parsed_) == 1) { \
variable = parsed_; \
} \
break; \
}
switch (buffer[0]) {
case 'M':
tryRead("MemTotal:", &this->totalMem);
tryRead("MemFree:", &freeMem);
tryRead("MemAvailable:", availableMem);
tryRead("MemFree:", freeMem);
tryRead("MemTotal:", totalMem);
break;
case 'B':
tryRead("Buffers:", &this->buffersMem);
tryRead("Buffers:", buffersMem);
break;
case 'C':
tryRead("Cached:", &this->cachedMem);
tryRead("Cached:", cachedMem);
break;
case 'S':
switch (buffer[1]) {
case 'w':
tryRead("SwapTotal:", &this->totalSwap);
tryRead("SwapCached:", &this->cachedSwap);
tryRead("SwapFree:", &swapFree);
break;
case 'h':
tryRead("Shmem:", &shmem);
tryRead("SwapTotal:", swapTotalMem);
tryRead("SwapCached:", swapCacheMem);
tryRead("SwapFree:", swapFreeMem);
break;
case 'R':
tryRead("SReclaimable:", &sreclaimable);
tryRead("SReclaimable:", sreclaimableMem);
break;
}
break;
}
#undef tryRead
}
this->usedMem = this->totalMem - freeMem;
this->cachedMem = this->cachedMem + sreclaimable - shmem;
this->usedSwap = this->totalSwap - swapFree - this->cachedSwap;
fclose(file);
/*
* Compute memory partition like procps(free)
* https://gitlab.com/procps-ng/procps/-/blob/master/proc/sysinfo.c
*/
this->totalMem = totalMem;
this->cachedMem = cachedMem + sreclaimableMem;
const memory_t usedDiff = freeMem + cachedMem + sreclaimableMem + buffersMem;
this->usedMem = (totalMem >= usedDiff) ? totalMem - usedDiff : totalMem - freeMem;
this->buffersMem = buffersMem;
this->availableMem = availableMem != 0 ? MINIMUM(availableMem, totalMem) : freeMem;
this->totalSwap = swapTotalMem;
this->usedSwap = swapTotalMem - swapFreeMem - swapCacheMem;
this->cachedSwap = swapCacheMem;
}
static void LinuxProcessList_scanHugePages(LinuxProcessList* this) {
this->totalHugePageMem = 0;
for (unsigned i = 0; i < HTOP_HUGEPAGE_COUNT; i++) {
this->usedHugePageMem[i] = ULLONG_MAX;
this->usedHugePageMem[i] = MEMORY_MAX;
}
DIR* dir = opendir("/sys/kernel/mm/hugepages");
@ -1614,7 +1632,7 @@ static void LinuxProcessList_scanHugePages(LinuxProcessList* this) {
if (r <= 0)
continue;
unsigned long long int total = strtoull(content, NULL, 10);
memory_t total = strtoull(content, NULL, 10);
if (total == 0)
continue;
@ -1623,7 +1641,7 @@ static void LinuxProcessList_scanHugePages(LinuxProcessList* this) {
if (r <= 0)
continue;
unsigned long long int free = strtoull(content, NULL, 10);
memory_t free = strtoull(content, NULL, 10);
int shift = ffsl(hugePageSize) - 1 - (HTOP_HUGEPAGE_BASE_SHIFT - 10);
assert(shift >= 0 && shift < HTOP_HUGEPAGE_COUNT);
@ -1636,9 +1654,9 @@ static void LinuxProcessList_scanHugePages(LinuxProcessList* this) {
}
static inline void LinuxProcessList_scanZramInfo(LinuxProcessList* this) {
unsigned long long int totalZram = 0;
unsigned long long int usedZramComp = 0;
unsigned long long int usedZramOrig = 0;
memory_t totalZram = 0;
memory_t usedZramComp = 0;
memory_t usedZramOrig = 0;
char mm_stat[34];
char disksize[34];
@ -1659,9 +1677,9 @@ static inline void LinuxProcessList_scanZramInfo(LinuxProcessList* this) {
}
break;
}
unsigned long long int size = 0;
unsigned long long int orig_data_size = 0;
unsigned long long int compr_data_size = 0;
memory_t size = 0;
memory_t orig_data_size = 0;
memory_t compr_data_size = 0;
if (!fscanf(disksize_file, "%llu\n", &size) ||
!fscanf(mm_stat_file, " %llu %llu", &orig_data_size, &compr_data_size)) {
@ -1684,9 +1702,9 @@ static inline void LinuxProcessList_scanZramInfo(LinuxProcessList* this) {
}
static inline void LinuxProcessList_scanZfsArcstats(LinuxProcessList* lpl) {
unsigned long long int dbufSize = 0;
unsigned long long int dnodeSize = 0;
unsigned long long int bonusSize = 0;
memory_t dbufSize = 0;
memory_t dnodeSize = 0;
memory_t bonusSize = 0;
FILE* file = fopen(PROCARCSTATSFILE, "r");
if (file == NULL) {

6
linux/LinuxProcessList.h
View File

@ -74,8 +74,10 @@ typedef struct LinuxProcessList_ {
int netlink_family;
#endif
unsigned long long int totalHugePageMem;
unsigned long long int usedHugePageMem[HTOP_HUGEPAGE_COUNT];
memory_t totalHugePageMem;
memory_t usedHugePageMem[HTOP_HUGEPAGE_COUNT];
memory_t availableMem;
ZfsArcStats zfs;
ZramStats zram;

13
linux/Platform.c
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@ -283,14 +283,11 @@ void Platform_setMemoryValues(Meter* this) {
const ProcessList* pl = this->pl;
const LinuxProcessList* lpl = (const LinuxProcessList*) pl;
long int usedMem = pl->usedMem;
long int buffersMem = pl->buffersMem;
long int cachedMem = pl->cachedMem;
usedMem -= buffersMem + cachedMem + lpl->totalHugePageMem;
this->total = pl->totalMem - lpl->totalHugePageMem;
this->values[0] = usedMem;
this->values[1] = buffersMem;
this->values[2] = cachedMem;
this->total = pl->totalMem;
this->values[0] = pl->usedMem;
this->values[1] = pl->buffersMem;
this->values[2] = pl->cachedMem;
this->values[3] = pl->availableMem;
if (lpl->zfs.enabled != 0) {
this->values[0] -= lpl->zfs.size;

6
linux/ZramStats.h
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@ -2,9 +2,9 @@
#define HEADER_ZramStats
typedef struct ZramStats_ {
unsigned long long int totalZram;
unsigned long long int usedZramComp;
unsigned long long int usedZramOrig;
memory_t totalZram;
memory_t usedZramComp;
memory_t usedZramOrig;
} ZramStats;
#endif