Re: C API to get Total SWAP installed on a HPUX machine

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• In reply to: Mike Stroyan: "Re: C API to get Total SWAP installed on a HPUX machine"
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Date: Tue, 26 Aug 2003 10:04:05 +0530

Mike Stroyan wrote:

> Manish Baronia <manishbaronia@hotmail.com> wrote:
> | I want to find out total swap installed on a HP Unix machine (In
> |C/C++). For this I got following code somewhere:
> ...
> |Can someone tell me if this is the correct way to find swap on HP UX
> |machines. I have tried it on 3 HP machines. It runs fine on one and
> |fails on other two.
>
> You can get swap summary data from pstat_getvminfo. Here is an
> example using several pstat interfaces.
>
> # This is a shell archive. Remove anything before this line,
> # then unpack it by saving it in a file and typing "sh file".
> #
> # Wrapped by Mike Stroyan <stroyan@hpstryn> on Mon Aug 25 14:27:16 2003
> #
> # This archive contains:
> # system_memstat.c
> #
>
> LANG=""; export LANG
> PATH=/bin:/usr/bin:/usr/sbin:/usr/ccs/bin:$PATH; export PATH
> EXIT_STATUS=0
>
> echo x - system_memstat.c
> cat >system_memstat.c <<'@EOF'
> #define _PSTAT64
> #include <sys/param.h>
> #include <sys/pstat.h>
> #include <sys/unistd.h>
> #include <stdio.h>
> int main(int argc, char *argv[])
> {
> struct pst_static pst;
> struct pst_dynamic dyn;
> struct pst_swapinfo swp;
> struct pst_vminfo vminfo;
> long page;
> long total_free_pages;
> long reserve;
> long total_used;
> long total_avail;
>
> if (pstat_getstatic(&pst, sizeof(pst), (size_t)1, 0) == -1) {
> perror("pstat_getstatic");
> return 1;
> }
> if (pstat_getvminfo(&vminfo, sizeof(vminfo), (size_t)1, 0) == -1) {
> perror("pstat_getvminfo");
> return 1;
> }
> if (pstat_getdynamic(&dyn, sizeof(dyn), (size_t)1, 0) == -1) {
> perror("pstat_getdynamic");
> return 1;
> }
>
> printf("page size is %d bytes\n", page = pst.page_size);
> printf("physical memory size is %lld pages, %lld bytes\n",
> (long long) pst.physical_memory,
> (long long) pst.physical_memory * pst.page_size);
> printf("pst_maxmem is %lld pages, %lld bytes\n",
> (long long) pst.pst_maxmem,
> (long long) pst.pst_maxmem * pst.page_size);
> printf("pst_lotsfree is %lld pages, %lld bytes\n",
> (long long) pst.pst_lotsfree,
> (long long) pst.pst_lotsfree * pst.page_size);
> printf("pst_desfree is %lld pages, %lld bytes\n",
> (long long) pst.pst_desfree,
> (long long) pst.pst_desfree * pst.page_size);
> printf("pst_minfree is %lld pages, %lld bytes\n",
> (long long) pst.pst_minfree,
> (long long) pst.pst_minfree * pst.page_size);
>
> total_free_pages = 0;
> {
> int i = 0;
> while (pstat_getswap(&swp, sizeof(struct pst_swapinfo), 1, i++) == 1) {
> printf("--------------------------------------\n");
> printf("pss_swapchunk = %lld \n", (long long) swp.pss_swapchunk);
> printf("pss_nblksenabled = %lld \n",
> (long long) swp.pss_nblksenabled);
> printf("pss_reserve = %lld \n", (long long) swp.pss_reserve);
> printf("pss_nblksavail = %lld \n", (long long) swp.pss_nblksavail);
> printf("Number of Free Swap Pages %lld. %d bytes\n",
> (long long) swp.pss_nfpgs,
> (long long) swp.pss_nfpgs*pst.page_size );
> printf("--------------------------------------\n\n");
> total_free_pages += swp.pss_nfpgs;
> }
> }
>
> #define PtoMB(pages) (((pages) * pst.page_size) / (1024.0*1024))
> printf("THIS STUFF MATCHES GLANCE.\n");
> printf("Total virtual memory %.1fmb\n", PtoMB(dyn.psd_vm));
> printf("active virtual memory %.1fmb\n", PtoMB(dyn.psd_avm));
> printf("total real memory %.1fmb\n", PtoMB(dyn.psd_rm));
> printf("active real memory %.1fmb\n", PtoMB(dyn.psd_arm));
> printf("free memory %.1fmb\n", PtoMB(dyn.psd_free));
> printf("pseudo-swap avail %.0fmb\n", PtoMB(vminfo.psv_swapmem_max));
> printf("\n");
>
> #define PtoKB(pages) (((pages) * pst.page_size) / 1024.0)
> printf("THIS STUFF MATCHES SWAPINFO.\n");
> printf("free on-disk backing store %.0f Kb (dev-reserve)\n",
> PtoKB(vminfo.psv_swapspc_cnt));
> printf("max on-disk backing store %.0f Kb\n",
> PtoKB(vminfo.psv_swapspc_max));
> printf("enable memory swap: %s\n",
> vminfo.psv_swapmem_on? "yes" : "no");
> printf("memory not available for memory swap %.0f Kb\n",
> PtoKB(vminfo.psv_sysmem));
> printf("free in-memory backing store %.0f Kb\n",
> PtoKB(vminfo.psv_swapmem_cnt));
> printf("max in-memory backing store %.0f Kb\n",
> PtoKB(vminfo.psv_swapmem_max));
> printf("reserved on-disk backing store %.0f Kb\n",
> PtoKB(reserve = (total_free_pages - vminfo.psv_swapspc_cnt)));
> printf("backing store overhead %.0f KB\n",
> PtoKB(vminfo.psv_swapper_mem));
> printf("paged in %.0f KB\n",
> PtoKB(vminfo.psv_spgpgin));
> printf("paged out %.0f KB\n",
> PtoKB(vminfo.psv_spgpgout));
> printf("swapped in %.0f KB\n",
> PtoKB(vminfo.psv_spswpin));
> printf("swapped out %.0f KB\n",
> PtoKB(vminfo.psv_spswpout));
> printf(" Kb Kb Kb PCT\n");
> printf("TYPE AVAIL USED FREE USED\n");
> printf("dev %8.0f%8.0f%8.0f %3.0f%%\n",
> PtoKB(vminfo.psv_swapspc_max),
> PtoKB(vminfo.psv_swapspc_max - total_free_pages),
> PtoKB(total_free_pages),
> 100.0 * (vminfo.psv_swapspc_max - total_free_pages) /
> (vminfo.psv_swapspc_max));
> printf("reserve -%8.0f%8.0f\n",
> PtoKB(reserve),
> -PtoKB(reserve));
> printf("memory %8.0f%8.0f%8.0f %3.0f%%\n",
> PtoKB(vminfo.psv_swapmem_max),
> PtoKB(vminfo.psv_swapmem_max - vminfo.psv_swapmem_cnt),
> PtoKB(vminfo.psv_swapmem_cnt),
> 100.0*(vminfo.psv_swapmem_max-vminfo.psv_swapmem_cnt) /
> (vminfo.psv_swapmem_max));
> printf("total %8.0f%8.0f%8.0f %3.0f%%\n",
> PtoKB(total_avail = vminfo.psv_swapspc_max + vminfo.psv_swapmem_max),
> PtoKB(total_used = total_avail - vminfo.psv_swapspc_cnt -
> vminfo.psv_swapmem_cnt),
> PtoKB(vminfo.psv_swapspc_cnt + vminfo.psv_swapmem_cnt),
> 100.0*(total_used / (double)total_avail));
> return 0;
> }
> @EOF
>
> chmod 600 system_memstat.c
>
> if [ $EXIT_STATUS -eq 1 ];then
> exit 1
> fi
> exit 0
>
> --
> Mike Stroyan, mike.stroyan@hp.com

This works. Thanks for your help.
Manish

• Previous message: Chuck Slivkoff: "Re: ignite display problem"
• In reply to: Mike Stroyan: "Re: C API to get Total SWAP installed on a HPUX machine"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]