bch/xmem
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Add Linux support, fix whitespace

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Read /proc/meminfo, pull out some numbers and use them.
This commit is contained in:
Christian Barthel 2022-01-08 08:28:15 +01:00
parent a6e2ded980
commit 34c8e85e49
2 changed files with 232 additions and 120 deletions
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11
README.md
View File

@ -1,2 +1,11 @@
# xmem(1) X11 Utility # xmem(1) X11 Utility
![fvwm and xmem](https://git.sdf.org/bch/xmem/raw/branch/master/www/xmem_fvwmbar.png) ![fvwm and xmem](https://git.sdf.org/bch/xmem/raw/branch/master/www/xmem_fvwmbar.png)
# Compile
```shell
# Linux with DEBUG:
CFLAGS=-DDEBUG make -f Makefile.linux
# BSD:
make
```

341
get_mem.c
View File

@ -13,7 +13,7 @@
#if __OpenBSD__ #if __OpenBSD__
#include <sys/param.h> /* DEV_BSIZE MAXCOMLEN PZERO */ #include <sys/param.h> /* DEV_BSIZE MAXCOMLEN PZERO */
#include <sys/sysctl.h> #include <sys/sysctl.h>
#include <sys/swap.h> #include <sys/swap.h>
#include <sys/mount.h> #include <sys/mount.h>
@ -36,89 +36,89 @@ static double allmem_kb = 0;
static void initPageShift(void) static void initPageShift(void)
{ {
int pagesize = getpagesize(); int pagesize = getpagesize();
pageshift = 0; pageshift = 0;
while (pagesize > 1) { while (pagesize > 1) {
pageshift++; pageshift++;
pagesize >>= 1; pagesize >>= 1;
} }
pageshift -= LOG1024; pageshift -= LOG1024;
} }
static double getSwapFrac() static double getSwapFrac()
{ {
struct swapent *swdev; struct swapent *swdev;
int used, total, nswap, rnswap, i; int used, total, nswap, rnswap, i;
nswap = swapctl(SWAP_NSWAP, 0, 0); nswap = swapctl(SWAP_NSWAP, 0, 0);
if (nswap == 0) if (nswap == 0)
return 0; return 0;
swdev = calloc(nswap, sizeof(*swdev)); swdev = calloc(nswap, sizeof(*swdev));
if (swdev == NULL) if (swdev == NULL)
return 0; return 0;
rnswap = swapctl(SWAP_STATS, swdev, nswap); rnswap = swapctl(SWAP_STATS, swdev, nswap);
if (rnswap == -1) { if (rnswap == -1) {
free(swdev); free(swdev);
return 0; return 0;
} }
/* if rnswap != nswap, then what? */ /* if rnswap != nswap, then what? */
/* Total things up */ /* Total things up */
total = used = 0; total = used = 0;
for (i = 0; i < nswap; i++) { for (i = 0; i < nswap; i++) {
if (swdev[i].se_flags & SWF_ENABLE) { if (swdev[i].se_flags & SWF_ENABLE) {
used += (swdev[i].se_inuse / (1024 / DEV_BSIZE)); used += (swdev[i].se_inuse / (1024 / DEV_BSIZE));
total += (swdev[i].se_nblks / (1024 / DEV_BSIZE)); total += (swdev[i].se_nblks / (1024 / DEV_BSIZE));
} }
} }
free(swdev); free(swdev);
return (double)used/total; return (double)used/total;
} }
void GetMemLoadPoint(Widget w, caddr_t closure, caddr_t call_data) void GetMemLoadPoint(Widget w, caddr_t closure, caddr_t call_data)
{ {
static int bcstats_mib[] = {CTL_VFS, VFS_GENERIC, VFS_BCACHESTAT}; static int bcstats_mib[] = {CTL_VFS, VFS_GENERIC, VFS_BCACHESTAT};
static int uvmexp_mib[] = {CTL_VM, VM_UVMEXP}; static int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
MemStripChartCallbackData ret; MemStripChartCallbackData ret;
struct uvmexp uvmexp; struct uvmexp uvmexp;
struct bcachestats bcstats; struct bcachestats bcstats;
size_t size; size_t size;
if (pageshift < 0) if (pageshift < 0)
initPageShift(); initPageShift();
size = sizeof(uvmexp); size = sizeof(uvmexp);
if (sysctl(uvmexp_mib, 2, &uvmexp, &size, NULL, 0) < 0) { if (sysctl(uvmexp_mib, 2, &uvmexp, &size, NULL, 0) < 0) {
warn("sysctl failed"); warn("sysctl failed");
bzero(&uvmexp, sizeof(uvmexp)); bzero(&uvmexp, sizeof(uvmexp));
} }
size = sizeof(bcstats); size = sizeof(bcstats);
if (sysctl(bcstats_mib, 3, &bcstats, &size, NULL, 0) < 0) { if (sysctl(bcstats_mib, 3, &bcstats, &size, NULL, 0) < 0) {
warn("sysctl failed"); warn("sysctl failed");
bzero(&bcstats, sizeof(bcstats)); bzero(&bcstats, sizeof(bcstats));
} }
allmem_kb = pagetok(uvmexp.npages); allmem_kb = pagetok(uvmexp.npages);
ret.cached = pagetok(bcstats.numbufpages) / allmem_kb; ret.cached = pagetok(bcstats.numbufpages) / allmem_kb;
ret.free = pagetok(uvmexp.free) / allmem_kb; ret.free = pagetok(uvmexp.free) / allmem_kb;
ret.buffer = 0; ret.buffer = 0;
ret.code = (1 - ret.cached - ret.free); ret.code = (1 - ret.cached - ret.free);
ret.swap = getSwapFrac(); ret.swap = getSwapFrac();
#ifdef DEBUG #ifdef DEBUG
printf("%lf %lf %lf %lf %lf\n", printf("%lf %lf %lf %lf %lf\n",
allmem_kb, allmem_kb,
ret.code, ret.code,
ret.cached, ret.cached,
ret.free, ret.free,
ret.swap); ret.swap);
#endif #endif
memcpy(call_data, &ret, sizeof(MemStripChartCallbackData)); memcpy(call_data, &ret, sizeof(MemStripChartCallbackData));
} }
#endif #endif
@ -133,7 +133,7 @@ void GetMemLoadPoint(Widget w, caddr_t closure, caddr_t call_data)
*/ */
#include <sys/types.h> /* DEV_BSIZE MAXCOMLEN PZERO */ #include <sys/types.h> /* DEV_BSIZE MAXCOMLEN PZERO */
#include <sys/sysctl.h> #include <sys/sysctl.h>
#include <unistd.h> #include <unistd.h>
@ -156,91 +156,194 @@ static unsigned int allmem_pages = 0;
static void initPageShift(void) static void initPageShift(void)
{ {
pagesize = getpagesize(); pagesize = getpagesize();
size_t len = sizeof(allmem_pages); size_t len = sizeof(allmem_pages);
int mib[len]; int mib[len];
pageshift = 0; pageshift = 0;
while (pagesize > 1) { while (pagesize > 1) {
pageshift++; pageshift++;
pagesize >>= 1; pagesize >>= 1;
} }
pageshift -= LOG1024; pageshift -= LOG1024;
kd = kvm_open(NULL, "/dev/null" ,NULL, O_RDONLY, "kvm_open"); kd = kvm_open(NULL, "/dev/null" ,NULL, O_RDONLY, "kvm_open");
if (sysctlbyname("vm.stats.vm.v_page_count", &allmem_pages, &len, NULL, 0) == -1) if (sysctlbyname("vm.stats.vm.v_page_count", &allmem_pages, &len, NULL, 0) == -1)
perror("sysctl"); perror("sysctl");
#ifdef DEBUG #ifdef DEBUG
printf("page_count: %d\n", allmem_pages); printf("page_count: %d\n", allmem_pages);
#endif #endif
} }
static double getSwapFrac() static double getSwapFrac()
{ {
/* XXX Borrowed from top(1) code: */ /* XXX Borrowed from top(1) code: */
int n; int n;
struct kvm_swap swapary[1]; struct kvm_swap swapary[1];
static int pagesize = 0; static int pagesize = 0;
static unsigned long swap_maxpages = 0; static unsigned long swap_maxpages = 0;
size_t sz = sizeof(swap_maxpages); size_t sz = sizeof(swap_maxpages);
int retavail = 0; int retavail = 0;
int retfree = 0; int retfree = 0;
n = kvm_getswapinfo(kd, swapary, 1, 0); n = kvm_getswapinfo(kd, swapary, 1, 0);
if (n < 0 || swapary[0].ksw_total == 0) if (n < 0 || swapary[0].ksw_total == 0)
return (0); return (0);
if (swap_maxpages == 0) if (swap_maxpages == 0)
sysctlbyname("vm.swap_maxpages", sysctlbyname("vm.swap_maxpages",
&swap_maxpages, &sz, NULL, 0); &swap_maxpages, &sz, NULL, 0);
if ( swapary[0].ksw_total > swap_maxpages ) if ( swapary[0].ksw_total > swap_maxpages )
swapary[0].ksw_total = swap_maxpages; swapary[0].ksw_total = swap_maxpages;
retavail = swapary[0].ksw_total; retavail = swapary[0].ksw_total;
retfree = swapary[0].ksw_total - swapary[0].ksw_used; retfree = swapary[0].ksw_total - swapary[0].ksw_used;
#ifdef DEBUG #ifdef DEBUG
printf("swap: %d %d %d %d\n", retavail, printf("swap: %d %d %d %d\n", retavail,
retavail, swapary[0].ksw_total, retavail, swapary[0].ksw_total,
swapary[0].ksw_used); swapary[0].ksw_used);
#endif #endif
return (double)(retavail-retfree)/(double)retavail; return (double)(retavail-retfree)/(double)retavail;
} }
void GetMemLoadPoint(Widget w, caddr_t closure, caddr_t call_data) void GetMemLoadPoint(Widget w, caddr_t closure, caddr_t call_data)
{ {
MemStripChartCallbackData ret; MemStripChartCallbackData ret;
int a, b; int a, b;
size_t sz = sizeof(int); size_t sz = sizeof(int);
double cache = 0; double cache = 0;
if (pageshift < 0) if (pageshift < 0)
initPageShift(); initPageShift();
sysctlbyname("vm.stats.vm.v_wire_count", &a, &sz, NULL, 0); sysctlbyname("vm.stats.vm.v_wire_count", &a, &sz, NULL, 0);
ret.code = (double)a / (double)allmem_pages; ret.code = (double)a / (double)allmem_pages;
sysctlbyname("vm.stats.vm.v_active_count", &a, &sz, NULL, 0); sysctlbyname("vm.stats.vm.v_active_count", &a, &sz, NULL, 0);
ret.buffer = (double)a / (double)allmem_pages; ret.buffer = (double)a / (double)allmem_pages;
/* v_cache_count and v_inactive_count are treated similarly */ /* v_cache_count and v_inactive_count are treated similarly */
sysctlbyname("vm.stats.vm.v_inactive_count", &a, &sz, NULL, 0); sysctlbyname("vm.stats.vm.v_inactive_count", &a, &sz, NULL, 0);
sysctlbyname("vm.stats.vm.v_cache_count", &b, &sz, NULL, 0); sysctlbyname("vm.stats.vm.v_cache_count", &b, &sz, NULL, 0);
ret.cached = (double)(a + b) / allmem_pages; ret.cached = (double)(a + b) / allmem_pages;
sysctlbyname("vm.stats.vm.v_free_count", &a, &sz, NULL, 0); sysctlbyname("vm.stats.vm.v_free_count", &a, &sz, NULL, 0);
ret.free = (double)a / allmem_pages; ret.free = (double)a / allmem_pages;
ret.swap = getSwapFrac(); ret.swap = getSwapFrac();
#ifdef DEBUG #ifdef DEBUG
printf("%u %lf %lf %lf %lf\n", allmem_pages, printf("%u %lf %lf %lf %lf\n", allmem_pages,
ret.code, ret.cached, ret.free, ret.swap); ret.code, ret.cached, ret.free, ret.swap);
#endif #endif
memcpy(call_data, &ret, sizeof(MemStripChartCallbackData)); memcpy(call_data, &ret, sizeof(MemStripChartCallbackData));
}
#endif
/* ------------------------------------------------------------------ */
#if __gnu_linux__
#include <X11/Xos.h>
#include <X11/Intrinsic.h>
#include <stdio.h>
#include <stdlib.h>
#include <err.h>
#include "MemStripChart.h"
static unsigned int total_mem = 0;
int GetRamInKB(int type)
{
FILE *meminfo = fopen("/proc/meminfo", "r");
if(meminfo == NULL)
err(1, "fopen on /proc/meminfo failed: ");
char line[256];
int memory = -1;
int found = 0;
while(found == 0 && fgets(line, sizeof(line), meminfo))
{
if (type == 1) {
if((sscanf(line, "MemTotal: %d kB", &memory)) == 1)
found = 1;
}
if (type == 2) {
if(sscanf(line, "MemFree: %d kB", &memory) == 1)
found = 1;
}
if (type == 3) {
if(sscanf(line, "Buffers: %d kB", &memory) == 1)
found = 1;
}
if (type == 4) {
if(sscanf(line, "Cached: %d kB", &memory) == 1)
found = 1;
}
if (type == 5) {
if(sscanf(line, "SwapTotal: %d kB", &memory) == 1)
found = 1;
}
if (type == 6) {
if(sscanf(line, "SwapFree: %d kB", &memory) == 1)
found = 1;
}
}
if (!found)
warnx("failed to sscanf type %d", type);
fclose(meminfo);
return memory;
}
static void init_total_mem(void)
{
if (total_mem <= 0)
total_mem = GetRamInKB(1);
#ifdef DEBUG
printf("MemTotal: %d\n", total_mem);
#endif
}
void GetMemLoadPoint(Widget w, caddr_t closure, caddr_t call_data)
{
MemStripChartCallbackData ret;
init_total_mem();
/* free(1):
* total
* used = total - free - buffers - cache
* /proc/meminfo
* total = MemTotal
* code = total - free - buffers - cache (“used”)
* buffer = Buffers
* cached = Cached
* free = MemFree
*/
int mem_free = GetRamInKB(2);
int buffers = GetRamInKB(3);
int cached = GetRamInKB(4);
int swap_total = GetRamInKB(5);
int swap_free = GetRamInKB(6);
ret.code = (total_mem - mem_free - buffers - cached)/(float)total_mem;
ret.buffer = (buffers)/(float)total_mem;
ret.cached = (cached)/(float)total_mem;
ret.free = (mem_free)/(float)total_mem;
ret.swap = (swap_total - swap_free)/(float)swap_total;
#ifdef DEBUG
printf("%u %lf %lf %lf %lf\n", total_mem,
ret.code, ret.cached, ret.free, ret.swap);
#endif
memcpy(call_data, &ret, sizeof(MemStripChartCallbackData));
} }
#endif #endif