PCP: add File Descriptor Meter

Related: #990 Signed-off-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
htop-dev · May 4, 2022 · d6506ad · d6506ad
1 parent 07fe4d1
commit d6506ad
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diff --git a/Makefile.am b/Makefile.am
@@ -375,6 +375,7 @@ endif
 # --------------------------
 
 pcp_platform_headers = \
+	FileDescriptorMeter.h \
 	linux/PressureStallMeter.h \
 	linux/ZramMeter.h \
 	linux/ZramStats.h \
@@ -390,6 +391,7 @@ pcp_platform_headers = \
 	zfs/ZfsCompressedArcMeter.h
 
 pcp_platform_sources = \
+	FileDescriptorMeter.c \
 	linux/PressureStallMeter.c \
 	linux/ZramMeter.c \
 	pcp/PCPDynamicColumn.c \

diff --git a/pcp/PCPMetric.h b/pcp/PCPMetric.h
@@ -91,6 +91,8 @@ typedef enum PCPMetric_ {
    PCP_ZRAM_CAPACITY,           /* zram.capacity */
    PCP_ZRAM_ORIGINAL,           /* zram.mm_stat.data_size.original */
    PCP_ZRAM_COMPRESSED,         /* zram.mm_stat.data_size.compressed */
+   PCP_VFS_FILES_COUNT,         /* vfs.files.count */
+   PCP_VFS_FILES_MAX,           /* vfs.files.max */
 
    PCP_PROC_PID,                /* proc.psinfo.pid */
    PCP_PROC_PPID,               /* proc.psinfo.ppid */

diff --git a/pcp/Platform.c b/pcp/Platform.c
@@ -25,6 +25,7 @@ in the source distribution for its full text.
 #include "DiskIOMeter.h"
 #include "DynamicColumn.h"
 #include "DynamicMeter.h"
+#include "FileDescriptorMeter.h"
 #include "HostnameMeter.h"
 #include "LoadAverageMeter.h"
 #include "Macros.h"
@@ -114,6 +115,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &DiskIOMeter_class,
    &NetworkIOMeter_class,
    &SysArchMeter_class,
+   &FileDescriptorMeter_class,
    NULL
 };
 
@@ -189,6 +191,8 @@ static const char* Platform_metricNames[] = {
    [PCP_ZRAM_CAPACITY] = "zram.capacity",
    [PCP_ZRAM_ORIGINAL] = "zram.mm_stat.data_size.original",
    [PCP_ZRAM_COMPRESSED] = "zram.mm_stat.data_size.compressed",
+   [PCP_VFS_FILES_COUNT] = "vfs.files.count",
+   [PCP_VFS_FILES_MAX] = "vfs.files.max",
 
    [PCP_PROC_PID] = "proc.psinfo.pid",
    [PCP_PROC_PPID] = "proc.psinfo.ppid",
@@ -699,6 +703,17 @@ bool Platform_getNetworkIO(NetworkIOData* data) {
    return true;
 }
 
+void Platform_getFileDescriptors(double* used, double* max) {
+   *used = NAN;
+   *max = NAN;
+
+   pmAtomValue value;
+   if (PCPMetric_values(PCP_VFS_FILES_COUNT, &value, 1, PM_TYPE_32) != NULL)
+      *used = value.l;
+   if (PCPMetric_values(PCP_VFS_FILES_MAX, &value, 1, PM_TYPE_32) != NULL)
+      *max = value.l;
+}
+
 void Platform_getBattery(double* level, ACPresence* isOnAC) {
    *level = NAN;
    *isOnAC = AC_ERROR;

diff --git a/pcp/Platform.h b/pcp/Platform.h
@@ -133,6 +133,8 @@ extern pmOptions opts;
 
 size_t Platform_addMetric(PCPMetric id, const char* name);
 
+void Platform_getFileDescriptors(double* used, double* max);
+
 void Platform_gettime_realtime(struct timeval* tv, uint64_t* msec);
 
 void Platform_gettime_monotonic(uint64_t* msec);