Introduce two dom0_ops and a userspace tool used to probe Xen's heap
availability and examine which nodes a domain's memory resides within.
availheap takes a zone and a node value and returns the current number
of free pages in that area of the heap. Using -1 as wildcards, one can
probe total free pages in a zone, or node.
getnodestat examines the page ownership of a domain. By walking the
domain's page list we can determine from which nodes a domain's memory
hails.
(bebop) tmp # xen_numastat -H -d -1
HEAPINFO: TOTAL_FREE_PAGES: 578057
HEAPINFO: NR_ZONES: 3
HEAPINFO: NR_NODES: 2
HEAPINFO: ZONE_XEN: NODE0: FREE_PAGES: 3507
HEAPINFO: ZONE_XEN: NODE1: FREE_PAGES: 0
HEAPINFO: ZONE_DOM: NODE0: FREE_PAGES: 0
HEAPINFO: ZONE_DOM: NODE1: FREE_PAGES: 107094
HEAPINFO: ZONE_DMA: NODE0: FREE_PAGES: 467456
HEAPINFO: ZONE_DMA: NODE1: FREE_PAGES: 0
DOM0: NODE0: PAGES: 43773
DOM0: NODE1: PAGES: 21768
DOM8: NODE0: PAGES: 5
DOM8: NODE1: PAGES: 262144
--
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253 T/L: 678-9253
ryanh@xxxxxxxxxx
diffstat output:
b/tools/xen_numastat/Makefile | 35 +++++
b/tools/xen_numastat/xen_numastat.1 | 22 +++
b/tools/xen_numastat/xen_numastat.c | 215 ++++++++++++++++++++++++++++++++++++
tools/Makefile | 1
tools/libxc/xc_domain.c | 45 +++++++
tools/libxc/xenctrl.h | 15 ++
xen/common/dom0_ops.c | 72 ++++++++++++
xen/common/page_alloc.c | 5
xen/include/public/dom0_ops.h | 22 +++
xen/include/xen/mm.h | 5
10 files changed, 432 insertions(+), 5 deletions(-)
Signed-off-by: Ryan Harper <ryanh@xxxxxxxxxx>
---
diff -r 4d529088b115 tools/Makefile
--- a/tools/Makefile Mon Jul 31 10:52:38 2006 -0500
+++ b/tools/Makefile Mon Jul 31 10:53:35 2006 -0500
@@ -13,6 +13,7 @@ SUBDIRS-y += console
SUBDIRS-y += console
SUBDIRS-y += xenmon
SUBDIRS-y += guest-headers
+SUBDIRS-y += xen_numastat
SUBDIRS-$(VTPM_TOOLS) += vtpm_manager
SUBDIRS-$(VTPM_TOOLS) += vtpm
SUBDIRS-y += xenstat
diff -r 4d529088b115 tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c Mon Jul 31 10:52:38 2006 -0500
+++ b/tools/libxc/xc_domain.c Mon Jul 31 10:53:35 2006 -0500
@@ -524,6 +524,51 @@ int xc_domain_iomem_permission(int xc_ha
op.u.iomem_permission.allow_access = allow_access;
return do_dom0_op(xc_handle, &op);
+}
+
+int xc_availheap(int xc_handle,
+ int zone,
+ int node,
+ uint32_t *nr_zones,
+ uint32_t *nr_nodes,
+ uint64_t *pages)
+{
+ DECLARE_DOM0_OP;
+ int rc = 0;
+
+ op.cmd = DOM0_AVAILHEAP;
+ op.u.availheap.zone = zone;
+ op.u.availheap.node = node;
+
+ rc = do_dom0_op(xc_handle, &op);
+ if ( rc >= 0 ) {
+ if (nr_zones)
+ *nr_zones = op.u.availheap.nr_zones;
+ if (nr_nodes)
+ *nr_nodes = op.u.availheap.nr_nodes;
+ *pages = op.u.availheap.pages;
+ }
+
+ return rc;
+}
+
+int xc_domain_getnodestat(int xc_handle,
+ uint32_t domid,
+ uint32_t node,
+ uint64_t *pages)
+{
+ DECLARE_DOM0_OP;
+ int rc = 0;
+
+ op.cmd = DOM0_GETDOMNODESTAT;
+ op.u.getdomnodestat.domain = (domid_t) domid;
+ op.u.getdomnodestat.node = node;
+
+ rc = do_dom0_op(xc_handle, &op);
+ if ( rc >= 0 )
+ *pages = op.u.getdomnodestat.pages;
+
+ return rc;
}
/*
diff -r 4d529088b115 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Mon Jul 31 10:52:38 2006 -0500
+++ b/tools/libxc/xenctrl.h Mon Jul 31 10:53:35 2006 -0500
@@ -541,6 +541,21 @@ int xc_get_pfn_type_batch(int xc_handle,
/* Get current total pages allocated to a domain. */
long xc_get_tot_pages(int xc_handle, uint32_t domid);
+/**
+ * This function retrieves the the number of pages in the
+ * specified domain that are on the specified node.
+ *
+ * @parm xc_handle a handle to an open hypervisor interface
+ * @parm domid the domain to query, -1 for per-node free list
+ * @parm node the node to query
+ * @parm *pages caller variable to put output
+ * @return 0 on success, <0 on failure.
+ */
+int xc_domain_getnodestat(int xc_handle, uint32_t domid, uint32_t node,
+ uint64_t *pages);
+
+int xc_availheap(int xc_handle, int zone, int node,
+ uint32_t *nr_zones, uint32_t *nr_nodes, uint64_t *pages);
/*
* Trace Buffer Operations
diff -r 4d529088b115 xen/common/dom0_ops.c
--- a/xen/common/dom0_ops.c Mon Jul 31 10:52:38 2006 -0500
+++ b/xen/common/dom0_ops.c Mon Jul 31 10:53:35 2006 -0500
@@ -22,6 +22,7 @@
#include <public/dom0_ops.h>
#include <public/sched_ctl.h>
#include <acm/acm_hooks.h>
+#include <asm/numa.h>
extern long arch_do_dom0_op(
struct dom0_op *op, XEN_GUEST_HANDLE(dom0_op_t) u_dom0_op);
@@ -712,6 +713,77 @@ long do_dom0_op(XEN_GUEST_HANDLE(dom0_op
}
break;
+ case DOM0_AVAILHEAP:
+ {
+ ret = -EINVAL;
+ if ( op->u.availheap.node >= num_online_nodes() )
+ break;
+ if ( op->u.availheap.zone >= NR_ZONES )
+ break;
+
+ /* indicate the number of zones/nodes queried.
+ * NB: -1 is wild card for all zones/nodes */
+ ( op->u.availheap.zone < 0 ) ?
+ (op->u.availheap.nr_zones=NR_ZONES) :
+ (op->u.availheap.nr_zones=1);
+
+ ( op->u.availheap.node < 0 ) ?
+ (op->u.availheap.nr_nodes=num_online_nodes()) :
+ (op->u.availheap.nr_nodes=1);
+
+ op->u.availheap.pages =
+ avail_heap_pages(op->u.availheap.zone, op->u.availheap.node);
+
+ if ( copy_to_guest(u_dom0_op, op, 1) )
+ ret = -EFAULT;
+ else
+ ret = 0;
+ }
+ break;
+
+ case DOM0_GETDOMNODESTAT:
+ {
+ struct domain *d;
+ struct page_info *pg;
+
+ ret = -EINVAL;
+ if ( op->u.getdomnodestat.node >= num_online_nodes() )
+ break;
+
+ ret = -ESRCH;
+ d = find_domain_by_id(op->u.getdomnodestat.domain);
+
+ if ( d != NULL )
+ {
+ /* clear out pages count */
+ op->u.getdomnodestat.pages = 0;
+
+ /* walk domain's page list and count pages on node */
+ spin_lock(&d->page_alloc_lock);
+ list_for_each_entry(pg, &d->page_list, list)
+ {
+ if ( phys_to_nid(page_to_maddr(pg)) ==
+ (int) op->u.getdomnodestat.node )
+ op->u.getdomnodestat.pages++;
+ }
+ list_for_each_entry(pg, &d->xenpage_list, list)
+ {
+ if ( phys_to_nid(page_to_maddr(pg)) ==
+ (int) op->u.getdomnodestat.node )
+ op->u.getdomnodestat.pages++;
+ }
+ spin_unlock(&d->page_alloc_lock);
+
+ put_domain(d);
+
+ if ( copy_to_guest(u_dom0_op, op, 1) )
+ ret = -EFAULT;
+ else
+ ret = 0;
+ }
+ }
+ break;
+
default:
ret = arch_do_dom0_op(op, u_dom0_op);
break;
diff -r 4d529088b115 xen/common/page_alloc.c
--- a/xen/common/page_alloc.c Mon Jul 31 10:52:38 2006 -0500
+++ b/xen/common/page_alloc.c Mon Jul 31 10:53:35 2006 -0500
@@ -241,11 +241,6 @@ unsigned long alloc_boot_pages(unsigned
* BINARY BUDDY ALLOCATOR
*/
-#define MEMZONE_XEN 0
-#define MEMZONE_DOM 1
-#define MEMZONE_DMADOM 2
-#define NR_ZONES 3
-
#define pfn_dom_zone_type(_pfn) \
(((_pfn) <= MAX_DMADOM_PFN) ? MEMZONE_DMADOM : MEMZONE_DOM)
diff -r 4d529088b115 xen/include/public/dom0_ops.h
--- a/xen/include/public/dom0_ops.h Mon Jul 31 10:52:38 2006 -0500
+++ b/xen/include/public/dom0_ops.h Mon Jul 31 10:53:35 2006 -0500
@@ -543,6 +543,26 @@ struct dom0_settimeoffset {
};
typedef struct dom0_settimeoffset dom0_settimeoffset_t;
DEFINE_XEN_GUEST_HANDLE(dom0_settimeoffset_t);
+
+#define DOM0_GETDOMNODESTAT 51
+typedef struct dom0_getdomnodestat {
+ int domain; /* domain to query, -1 to query per-node free list */
+ int32_t node; /* node to query */
+ uint64_t pages; /* number of pages on node */
+} dom0_getdomnodestat_t;
+DEFINE_XEN_GUEST_HANDLE(dom0_getdomnodestat_t);
+
+#define DOM0_AVAILHEAP 52
+typedef struct dom0_availheap {
+ /* in */
+ int zone; /* query available pages in zone, -1 for all */
+ int node; /* query available pages in node, -1 for all */
+ /* out */
+ uint32_t nr_zones; /* number of zones queried */
+ uint32_t nr_nodes; /* number of nodes queried */
+ uint64_t pages;
+} dom0_availheap_t;
+DEFINE_XEN_GUEST_HANDLE(dom0_availheap_t);
struct dom0_op {
uint32_t cmd;
@@ -587,6 +607,8 @@ struct dom0_op {
struct dom0_hypercall_init hypercall_init;
struct dom0_domain_setup domain_setup;
struct dom0_settimeoffset settimeoffset;
+ struct dom0_getdomnodestat getdomnodestat;
+ struct dom0_availheap availheap;
uint8_t pad[128];
} u;
};
diff -r 4d529088b115 xen/include/xen/mm.h
--- a/xen/include/xen/mm.h Mon Jul 31 10:52:38 2006 -0500
+++ b/xen/include/xen/mm.h Mon Jul 31 10:53:35 2006 -0500
@@ -32,6 +32,11 @@
#include <xen/types.h>
#include <xen/list.h>
#include <xen/spinlock.h>
+
+#define MEMZONE_XEN 0
+#define MEMZONE_DOM 1
+#define MEMZONE_DMADOM 2
+#define NR_ZONES 3
struct domain;
struct page_info;
diff -r 4d529088b115 tools/xen_numastat/Makefile
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/xen_numastat/Makefile Mon Jul 31 10:53:35 2006 -0500
@@ -0,0 +1,35 @@
+INSTALL = install
+INSTALL_PROG = $(INSTALL) -m0755
+INSTALL_DIR = $(INSTALL) -d -m0755
+INSTALL_DATA = $(INSTALL) -m0644
+
+XEN_ROOT=../..
+include $(XEN_ROOT)/tools/Rules.mk
+
+CFLAGS += -Wall -Werror -g
+
+CFLAGS += -I $(XEN_XC)
+CFLAGS += -I $(XEN_LIBXC)
+
+HDRS = $(wildcard *.h)
+OBJS = $(patsubst %.c,%.o,$(wildcard *.c))
+
+BIN = xen_numastat
+MAN1 = $(wildcard *.1)
+LIBBIN =
+
+all: build
+build: $(BIN)
+
+install: build
+ [ -d $(DESTDIR)/usr/bin ] || $(INSTALL_DIR) $(DESTDIR)/usr/bin
+ $(INSTALL_PROG) $(BIN) $(DESTDIR)/usr/bin
+ [ -d $(DESTDIR)/usr/share/man/man1 ] || \
+ $(INSTALL_DIR) $(DESTDIR)/usr/share/man/man1
+ $(INSTALL_DATA) $(MAN1) $(DESTDIR)/usr/share/man/man1
+
+clean:
+ $(RM) *.a *.so *.o $(BIN)
+
+%: %.c $(HDRS) Makefile
+ $(CC) $(CFLAGS) -o $@ $< -L$(XEN_LIBXC) -lxenctrl
diff -r 4d529088b115 tools/xen_numastat/xen_numastat.1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/xen_numastat/xen_numastat.1 Mon Jul 31 10:53:35 2006 -0500
@@ -0,0 +1,22 @@
+.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.35.
+.TH XEN_NUMASTAT "1" "May 2006" "Usage: xen_numastat [OPTION]" "User Commands"
+.SH NAME
+xen_numastat - Displays NUMA statistics about machine and domains
+.SH SYNOPSIS
+.B xen_numastat
+[\fIOPTIONS\fR]
+.SH DESCRIPTION
+Displays NUMA statistics about machine and domains
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+display this help and exit
+.TP
+\fB\-H\fR, \fB\-\-heapinfo\fR
+display info about Xen HEAP
+.TP
+\fB\-d\fR, \fB\-\-domid\fR <D>
+display NUMA info about domain D
+.TP
+\fB\-p\fR, \fB\-\-physinfo\fR
+display NUMA info about this machine
+.PP
diff -r 4d529088b115 tools/xen_numastat/xen_numastat.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/xen_numastat/xen_numastat.c Mon Jul 31 10:53:35 2006 -0500
@@ -0,0 +1,215 @@
+/*\
+ * Copyright (C) International Business Machines Corp., 2006
+ * Author(s): Ryan Harper <ryanh@xxxxxxxxxx>
+ *
+ * Xen Domain NUMA statistics tool
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; under version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details. *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+\*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <err.h>
+#include <errno.h>
+#include <xenctrl.h>
+#include <getopt.h>
+#include <inttypes.h>
+
+#define DOMAIN 0
+#define PHYSICAL 1
+/* this is a bit arbitrary, might be nice to query from xen */
+#define MAX_DOMAINS 256
+
+/* taken from xen/include/xen/mm.h */
+#define MEMZONE_XEN 0
+#define MEMZONE_DOM 1
+#define MEMZONE_DMADOM 2
+
+static void usage(const char *program) {
+ printf("Usage: %s [OPTION]\n"
+ "Displays NUMA statistics about machine and domains \n"
+ "\n"
+ " -h, --help display this help and exit\n"
+ " -H, --heapinfo display info about Xen HEAP\n"
+ " -d, --domid <D> display NUMA info about domain D\n"
+ " -p, --physinfo display NUMA info about this machine\n"
+ , program);
+}
+
+int str_to_domid(const char* domidstr) {
+ char *end = NULL;
+ int domid;
+
+ domid = strtol(domidstr, &end, 10);
+ if (end && *end) {
+ fprintf(stderr, "Invalid DOMID `%s'\n", domidstr);
+ fprintf(stderr, "*end -> %c\n", *end);
+ exit(EINVAL);
+ }
+
+ return domid;
+}
+
+void display_dominfo(int xc_handle, int domid, int nr_nodes)
+{
+ xc_domaininfo_t *dominfo =NULL;
+ uint64_t pages;
+ unsigned int i, j, num_domains = 1;
+
+ /* malloc a large buffer for info */
+ if ( !(dominfo = malloc(MAX_DOMAINS * sizeof(xc_domaininfo_t))) )
+ err(errno, "failed to malloc memory");
+
+ /* get actual number of domains */
+ num_domains = xc_domain_getinfolist(xc_handle, 0, MAX_DOMAINS, dominfo);
+
+ for (i=0; i<num_domains; i++) {
+ /* show all domains, or only requested domain */
+ if (domid == -1 || domid == dominfo[i].domain) {
+ /* print domain per-node info */
+ for (j=0; j < nr_nodes; j++) {
+ if (xc_domain_getnodestat(xc_handle,
+ dominfo[i].domain, j, &pages) < 0)
+ err(errno, "xc_domain_getnodestat()");
+ printf("DOM%d: NODE%d: PAGES: %"PRIu64"\n",
+ dominfo[i].domain, j, pages);
+ }
+ }
+ }
+
+ free(dominfo);
+}
+
+void display_heapinfo(int xc_handle)
+{
+ int i,j;
+ uint32_t nr_zones, nr_nodes;
+ uint64_t pages;
+ char zone[8];
+
+ /* get zones/nodes and total free pages */
+ if( xc_availheap(xc_handle, -1, -1, &nr_zones, &nr_nodes, &pages) )
+ err(errno, "xc_availheap()");
+
+ printf("HEAPINFO: TOTAL_FREE_PAGES: %"PRIu64"\n", pages);
+ printf("HEAPINFO: NR_ZONES: %d\n", nr_zones);
+ printf("HEAPINFO: NR_NODES: %d\n", nr_nodes);
+
+ for (i=0; i<nr_zones; i++) {
+ switch(i) {
+ case MEMZONE_XEN:
+ sprintf(zone, "XEN");
+ break;
+ case MEMZONE_DOM:
+ sprintf(zone, "DOM");
+ break;
+ case MEMZONE_DMADOM:
+ sprintf(zone, "DMA");
+ break;
+ }
+ for (j=0; j<nr_nodes; j++) {
+ if( xc_availheap(xc_handle, i, j, NULL, NULL, &pages) )
+ err(errno, "xc_availheap()");
+ printf("HEAPINFO: ZONE_%s: NODE%d: FREE_PAGES: %"PRIu64"\n",
+ zone, j, pages);
+ }
+ }
+}
+
+void display_physinfo(int xc_handle, xc_physinfo_t *info)
+{
+
+ printf("PHYSINFO: NR_NODES: %d\n", info->nr_nodes);
+
+}
+
+int main(int argc, char * argv[])
+{
+
+ char *sopt = "d:Hhp";
+ int ch;
+ int opt_ind=0, heapinfo=0, dominfo=0, physinfo=0, domid=-1;
+ int xc_handle, rc;
+ xc_physinfo_t info;
+ xc_memory_chunk_t *chunks;
+ xc_node_to_cpu_t *map;
+ struct option lopt[] = {
+ { "domid", 1, 0, 'd' },
+ { "heapinfo", 0, 0, 'H' },
+ { "help", 0, 0, 'h' },
+ { "physinfo", 0, 0, 'p' },
+ { 0, 0, 0, 0 }
+ };
+
+ while((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
+ switch(ch) {
+ case 'd':
+ /* convert domid */
+ domid = str_to_domid(optarg);
+ dominfo = 1;
+ break;
+ case 'H':
+ heapinfo = 1;
+ break;
+ case 'h':
+ usage(argv[0]);
+ exit(0);
+ break;
+ case 'p':
+ physinfo = 1;
+ break;
+ }
+ }
+
+ /* display help if no options are passed */
+ if (dominfo == 0 && physinfo == 0 && heapinfo == 0) {
+ usage(argv[0]);
+ exit(0);
+ }
+
+ /* set up */
+ xc_handle = xc_interface_open();
+ if (xc_handle == -1)
+ err(errno, "xc_interface_open()");
+
+ /* make space for mem chunks */
+ chunks = (xc_memory_chunk_t *)
+ malloc( sizeof(xc_memory_chunk_t) * PUBLIC_MAXCHUNKS );
+ set_xen_guest_handle(info.memory_chunks, chunks);
+
+ /* make space for node_to_cpu mapping */
+ map = (xc_node_to_cpu_t *)
+ malloc( sizeof(xc_node_to_cpu_t) * PUBLIC_MAX_NUMNODES );
+ set_xen_guest_handle(info.node_to_cpu, map);
+
+ /* get the machine physinfo */
+ rc = xc_physinfo(xc_handle, &info);
+ if (rc < 0)
+ err(errno, "xc_physinfo()");
+
+ if (physinfo > 0)
+ display_physinfo(xc_handle, &info);
+ if (heapinfo > 0)
+ display_heapinfo(xc_handle);
+ if (dominfo > 0)
+ display_dominfo(xc_handle, domid, info.nr_nodes);
+
+ /* free malloc'd memory */
+ free(chunks);
+ free(map);
+
+ xc_interface_close(xc_handle);
+
+ return 0;
+}
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