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Introduce two new sysctl's.. vm.kvm_size and vm.kvm_free. These are

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purely informational and can give some advance indications of tuning
problems.  These are i386 only for now as it seems that the i386 is
the only one suffering kvm pressure.
This commit is contained in:
Peter Wemm 2001-08-22 00:50:46 +00:00
parent c412ee3a28
commit 3d6fde76ed
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=82121
2 changed files with 42 additions and 0 deletions
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21
sys/amd64/amd64/pmap.c
View File

@ -83,6 +83,7 @@
#include <sys/sx.h>
#include <sys/user.h>
#include <sys/vmmeter.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
@ -1366,6 +1367,26 @@ pmap_release(pmap)
if (ptdpg && !pmap_release_free_page(pmap, ptdpg))
goto retry;
}
static int
kvm_size(SYSCTL_HANDLER_ARGS)
{
unsigned long ksize = VM_MAX_KERNEL_ADDRESS - KERNBASE;
return sysctl_handle_long(oidp, &ksize, 0, req);
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_size, "IU", "Size of KVM");
static int
kvm_free(SYSCTL_HANDLER_ARGS)
{
unsigned long kfree = VM_MAX_KERNEL_ADDRESS - kernel_vm_end;
return sysctl_handle_long(oidp, &kfree, 0, req);
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_free, "IU", "Amount of KVM free");
/*
* grow the number of kernel page table entries, if needed

21
sys/i386/i386/pmap.c
View File

@ -83,6 +83,7 @@
#include <sys/sx.h>
#include <sys/user.h>
#include <sys/vmmeter.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
@ -1366,6 +1367,26 @@ pmap_release(pmap)
if (ptdpg && !pmap_release_free_page(pmap, ptdpg))
goto retry;
}
static int
kvm_size(SYSCTL_HANDLER_ARGS)
{
unsigned long ksize = VM_MAX_KERNEL_ADDRESS - KERNBASE;
return sysctl_handle_long(oidp, &ksize, 0, req);
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_size, "IU", "Size of KVM");
static int
kvm_free(SYSCTL_HANDLER_ARGS)
{
unsigned long kfree = VM_MAX_KERNEL_ADDRESS - kernel_vm_end;
return sysctl_handle_long(oidp, &kfree, 0, req);
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_free, "IU", "Amount of KVM free");
/*
* grow the number of kernel page table entries, if needed