Date: Sun, 29 Mar 2015 08:17:52 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Alexander Motin <mav@freebsd.org> Cc: "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org> Subject: Re: svn commit: r280805 - head/sys/kern Message-ID: <CAJ-Vmom%2BSwaC_D4E1PGtmF-RTkqmPfj5v9QtSxqm=iVnEUw1fg@mail.gmail.com> In-Reply-To: <201503291002.t2TA2TbM021925@svn.freebsd.org> References: <201503291002.t2TA2TbM021925@svn.freebsd.org>
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You know, I exactly wanted this about two days ago, but from userland. Do we expose this to userland? -a On 29 March 2015 at 03:02, Alexander Motin <mav@freebsd.org> wrote: > Author: mav > Date: Sun Mar 29 10:02:29 2015 > New Revision: 280805 > URL: https://svnweb.freebsd.org/changeset/base/280805 > > Log: > Add four new DDB commands to display vmem(9) statistics. > > In particular, such DDB commands were added: > show vmem <addr> > show all vmem > show vmemdump <addr> > show all vmemdump > > As possible usage, that allows to see KVA usage and fragmentation. > > Modified: > head/sys/kern/subr_vmem.c > > Modified: head/sys/kern/subr_vmem.c > ============================================================================== > --- head/sys/kern/subr_vmem.c Sun Mar 29 07:48:02 2015 (r280804) > +++ head/sys/kern/subr_vmem.c Sun Mar 29 10:02:29 2015 (r280805) > @@ -1390,6 +1390,8 @@ vmem_dump(const vmem_t *vm , int (*pr)(c > #endif /* defined(DDB) || defined(DIAGNOSTIC) */ > > #if defined(DDB) > +#include <ddb/ddb.h> > + > static bt_t * > vmem_whatis_lookup(vmem_t *vm, vmem_addr_t addr) > { > @@ -1443,6 +1445,78 @@ vmem_print(vmem_addr_t addr, const char > > vmem_dump(vm, pr); > } > + > +DB_SHOW_COMMAND(vmemdump, vmemdump) > +{ > + > + if (!have_addr) { > + db_printf("usage: show vmemdump <addr>\n"); > + return; > + } > + > + vmem_dump((const vmem_t *)addr, db_printf); > +} > + > +DB_SHOW_ALL_COMMAND(vmemdump, vmemdumpall) > +{ > + const vmem_t *vm; > + > + LIST_FOREACH(vm, &vmem_list, vm_alllist) > + vmem_dump(vm, db_printf); > +} > + > +DB_SHOW_COMMAND(vmem, vmem_summ) > +{ > + const vmem_t *vm = (const void *)addr; > + const bt_t *bt; > + size_t ft[VMEM_MAXORDER], ut[VMEM_MAXORDER]; > + size_t fs[VMEM_MAXORDER], us[VMEM_MAXORDER]; > + int ord; > + > + if (!have_addr) { > + db_printf("usage: show vmem <addr>\n"); > + return; > + } > + > + db_printf("vmem %p '%s'\n", vm, vm->vm_name); > + db_printf("\tquantum:\t%zu\n", vm->vm_quantum_mask + 1); > + db_printf("\tsize:\t%zu\n", vm->vm_size); > + db_printf("\tinuse:\t%zu\n", vm->vm_inuse); > + db_printf("\tfree:\t%zu\n", vm->vm_size - vm->vm_inuse); > + db_printf("\tbusy tags:\t%d\n", vm->vm_nbusytag); > + db_printf("\tfree tags:\t%d\n", vm->vm_nfreetags); > + > + memset(&ft, 0, sizeof(ft)); > + memset(&ut, 0, sizeof(ut)); > + memset(&fs, 0, sizeof(fs)); > + memset(&us, 0, sizeof(us)); > + TAILQ_FOREACH(bt, &vm->vm_seglist, bt_seglist) { > + ord = SIZE2ORDER(bt->bt_size >> vm->vm_quantum_shift); > + if (bt->bt_type == BT_TYPE_BUSY) { > + ut[ord]++; > + us[ord] += bt->bt_size; > + } else if (bt->bt_type == BT_TYPE_FREE) { > + ft[ord]++; > + fs[ord] += bt->bt_size; > + } > + } > + db_printf("\t\t\tinuse\tsize\t\tfree\tsize\n"); > + for (ord = 0; ord < VMEM_MAXORDER; ord++) { > + if (ut[ord] == 0 && ft[ord] == 0) > + continue; > + db_printf("\t%-15zu %zu\t%-15zu %zu\t%-16zu\n", > + ORDER2SIZE(ord) << vm->vm_quantum_shift, > + ut[ord], us[ord], ft[ord], fs[ord]); > + } > +} > + > +DB_SHOW_ALL_COMMAND(vmem, vmem_summall) > +{ > + const vmem_t *vm; > + > + LIST_FOREACH(vm, &vmem_list, vm_alllist) > + vmem_summ((db_expr_t)vm, TRUE, count, modif); > +} > #endif /* defined(DDB) */ > > #define vmem_printf printf >
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