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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] libxl: expose cpu topology as a single list of cpu->{node, core, socket} maps.
# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1328027679 0
# Node ID 1d8f40029ddb87c511d0237ab7ae9d4d117ea6cf
# Parent bff9e4b818b97d6282b8d427e43ffb194ac7f593
libxl: expose cpu topology as a single list of cpu->{node,core,socket} maps.
Rather than the previous tripple list which is more complicated to work with
and harder for language bindings.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Acked-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Committed-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
---
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/libxl/gentest.py
--- a/tools/libxl/gentest.py Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/libxl/gentest.py Tue Jan 31 16:34:39 2012 +0000
@@ -195,6 +195,7 @@
*p = l;
}
+#if 0 /* To be remove in a subsequent patch */
static void libxl_cpuarray_rand_init(libxl_cpuarray *p)
{
int i;
@@ -209,6 +210,7 @@
p->array[i] = r;
}
}
+#endif
""")
for ty in builtins + types:
if ty.typename not in handcoded:
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/libxl/libxl.c
--- a/tools/libxl/libxl.c Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/libxl/libxl.c Tue Jan 31 16:34:39 2012 +0000
@@ -2755,57 +2755,68 @@
return 0;
}
-int libxl_get_topologyinfo(libxl_ctx *ctx, libxl_topologyinfo *info)
+libxl_cputopology *libxl_get_cpu_topology(libxl_ctx *ctx, int *nr)
{
xc_topologyinfo_t tinfo;
DECLARE_HYPERCALL_BUFFER(xc_cpu_to_core_t, coremap);
DECLARE_HYPERCALL_BUFFER(xc_cpu_to_socket_t, socketmap);
DECLARE_HYPERCALL_BUFFER(xc_cpu_to_node_t, nodemap);
+ libxl_cputopology *ret = NULL;
int i;
- int rc = 0;
-
- rc += libxl_cpuarray_alloc(ctx, &info->coremap);
- rc += libxl_cpuarray_alloc(ctx, &info->socketmap);
- rc += libxl_cpuarray_alloc(ctx, &info->nodemap);
- if (rc)
+ int max_cpus;
+
+ max_cpus = libxl_get_max_cpus(ctx);
+ if (max_cpus == 0)
+ {
+ LIBXL__LOG(ctx, XTL_ERROR, "Unable to determine number of CPUS");
+ return NULL;
+ }
+
+ coremap = xc_hypercall_buffer_alloc
+ (ctx->xch, coremap, sizeof(*coremap) * max_cpus);
+ socketmap = xc_hypercall_buffer_alloc
+ (ctx->xch, socketmap, sizeof(*socketmap) * max_cpus);
+ nodemap = xc_hypercall_buffer_alloc
+ (ctx->xch, nodemap, sizeof(*nodemap) * max_cpus);
+ if ((coremap == NULL) || (socketmap == NULL) || (nodemap == NULL)) {
+ LIBXL__LOG_ERRNOVAL(ctx, XTL_ERROR, ENOMEM,
+ "Unable to allocate hypercall arguments");
goto fail;
-
- coremap = xc_hypercall_buffer_alloc(ctx->xch, coremap, sizeof(*coremap) *
info->coremap.entries);
- socketmap = xc_hypercall_buffer_alloc(ctx->xch, socketmap,
sizeof(*socketmap) * info->socketmap.entries);
- nodemap = xc_hypercall_buffer_alloc(ctx->xch, nodemap, sizeof(*nodemap) *
info->nodemap.entries);
- if ((coremap == NULL) || (socketmap == NULL) || (nodemap == NULL))
- goto fail;
+ }
set_xen_guest_handle(tinfo.cpu_to_core, coremap);
set_xen_guest_handle(tinfo.cpu_to_socket, socketmap);
set_xen_guest_handle(tinfo.cpu_to_node, nodemap);
- tinfo.max_cpu_index = info->coremap.entries - 1;
- if (xc_topologyinfo(ctx->xch, &tinfo) != 0)
+ tinfo.max_cpu_index = max_cpus - 1;
+ if (xc_topologyinfo(ctx->xch, &tinfo) != 0) {
+ LIBXL__LOG_ERRNO(ctx, XTL_ERROR, "Topology info hypercall failed");
goto fail;
-
- for (i = 0; i <= tinfo.max_cpu_index; i++) {
- if (i < info->coremap.entries)
- info->coremap.array[i] = (coremap[i] == INVALID_TOPOLOGY_ID) ?
- LIBXL_CPUARRAY_INVALID_ENTRY : coremap[i];
- if (i < info->socketmap.entries)
- info->socketmap.array[i] = (socketmap[i] == INVALID_TOPOLOGY_ID) ?
- LIBXL_CPUARRAY_INVALID_ENTRY : socketmap[i];
- if (i < info->nodemap.entries)
- info->nodemap.array[i] = (nodemap[i] == INVALID_TOPOLOGY_ID) ?
- LIBXL_CPUARRAY_INVALID_ENTRY : nodemap[i];
}
- xc_hypercall_buffer_free(ctx->xch, coremap);
- xc_hypercall_buffer_free(ctx->xch, socketmap);
- xc_hypercall_buffer_free(ctx->xch, nodemap);
- return 0;
+ ret = malloc(sizeof(libxl_cputopology) * max_cpus);
+ if (ret == NULL) {
+ LIBXL__LOG_ERRNOVAL(ctx, XTL_ERROR, ENOMEM,
+ "Unable to allocate return value");
+ goto fail;
+ }
+
+ for (i = 0; i <= max_cpus; i++) {
+#define V(map, i) (map[i] == INVALID_TOPOLOGY_ID) ? \
+ LIBXL_CPUTOPOLOGY_INVALID_ENTRY : map[i]
+ ret[i].core = V(coremap, i);
+ ret[i].socket = V(socketmap, i);
+ ret[i].node = V(nodemap, i);
+#undef V
+ }
fail:
xc_hypercall_buffer_free(ctx->xch, coremap);
xc_hypercall_buffer_free(ctx->xch, socketmap);
xc_hypercall_buffer_free(ctx->xch, nodemap);
- libxl_topologyinfo_dispose(info);
- return ERROR_FAIL;
+
+ if (ret)
+ *nr = max_cpus;
+ return ret;
}
const libxl_version_info* libxl_get_version_info(libxl_ctx *ctx)
@@ -3604,30 +3615,30 @@
int libxl_cpupool_cpuadd_node(libxl_ctx *ctx, uint32_t poolid, int node, int
*cpus)
{
int rc = 0;
- int cpu;
+ int cpu, nr;
libxl_cpumap freemap;
- libxl_topologyinfo topology;
+ libxl_cputopology *topology;
if (libxl_get_freecpus(ctx, &freemap)) {
return ERROR_FAIL;
}
- if (libxl_get_topologyinfo(ctx, &topology)) {
+ topology = libxl_get_cpu_topology(ctx, &nr);
+ if (!topology) {
rc = ERROR_FAIL;
goto out;
}
*cpus = 0;
- for (cpu = 0; cpu < topology.nodemap.entries; cpu++) {
- if (libxl_cpumap_test(&freemap, cpu) &&
- (topology.nodemap.array[cpu] == node) &&
+ for (cpu = 0; cpu < nr; cpu++) {
+ if (libxl_cpumap_test(&freemap, cpu) && (topology[cpu].node == node) &&
!libxl_cpupool_cpuadd(ctx, poolid, cpu)) {
(*cpus)++;
}
+ libxl_cputopology_dispose(&topology[cpu]);
}
- libxl_topologyinfo_dispose(&topology);
-
+ free(topology);
out:
libxl_cpumap_dispose(&freemap);
return rc;
@@ -3651,8 +3662,8 @@
int ret = 0;
int n_pools;
int p;
- int cpu;
- libxl_topologyinfo topology;
+ int cpu, nr_cpus;
+ libxl_cputopology *topology;
libxl_cpupoolinfo *poolinfo;
poolinfo = libxl_list_cpupool(ctx, &n_pools);
@@ -3660,7 +3671,8 @@
return ERROR_NOMEM;
}
- if (libxl_get_topologyinfo(ctx, &topology)) {
+ topology = libxl_get_cpu_topology(ctx, &nr_cpus);
+ if (!topology) {
ret = ERROR_FAIL;
goto out;
}
@@ -3668,8 +3680,8 @@
*cpus = 0;
for (p = 0; p < n_pools; p++) {
if (poolinfo[p].poolid == poolid) {
- for (cpu = 0; cpu < topology.nodemap.entries; cpu++) {
- if ((topology.nodemap.array[cpu] == node) &&
+ for (cpu = 0; cpu < nr_cpus; cpu++) {
+ if ((topology[cpu].node == node) &&
libxl_cpumap_test(&poolinfo[p].cpumap, cpu) &&
!libxl_cpupool_cpuremove(ctx, poolid, cpu)) {
(*cpus)++;
@@ -3678,7 +3690,9 @@
}
}
- libxl_topologyinfo_dispose(&topology);
+ for (cpu = 0; cpu < nr_cpus; cpu++)
+ libxl_cputopology_dispose(&topology[cpu]);
+ free(topology);
out:
for (p = 0; p < n_pools; p++) {
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/libxl/libxl.h
--- a/tools/libxl/libxl.h Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/libxl/libxl.h Tue Jan 31 16:34:39 2012 +0000
@@ -576,7 +576,9 @@
*/
int libxl_get_physinfo(libxl_ctx *ctx, libxl_physinfo *physinfo);
-int libxl_get_topologyinfo(libxl_ctx *ctx, libxl_topologyinfo *info);
+#define LIBXL_CPUTOPOLOGY_INVALID_ENTRY (~(uint32_t)0)
+libxl_cputopology *libxl_get_cpu_topology(libxl_ctx *ctx, int *nr);
+void libxl_cputopology_list_free(libxl_cputopology *, int nr);
libxl_vcpuinfo *libxl_list_vcpu(libxl_ctx *ctx, uint32_t domid,
int *nb_vcpu, int *nrcpus);
int libxl_set_vcpuaffinity(libxl_ctx *ctx, uint32_t domid, uint32_t vcpuid,
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/libxl/libxl_types.idl
--- a/tools/libxl/libxl_types.idl Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/libxl/libxl_types.idl Tue Jan 31 16:34:39 2012 +0000
@@ -376,10 +376,10 @@
("phys_cap", uint32),
], dispose_fn=None, dir=DIR_OUT)
-libxl_topologyinfo = Struct("topologyinfo", [
- ("coremap", libxl_cpuarray), # cpu to core map
- ("socketmap", libxl_cpuarray), # cpu to socket map
- ("nodemap", libxl_cpuarray), # cpu to node map
+libxl_cputopology = Struct("cputopology", [
+ ("core", uint32),
+ ("socket", uint32),
+ ("node", uint32),
])
libxl_sched_credit = Struct("sched_credit", [
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/libxl/libxl_utils.c
--- a/tools/libxl/libxl_utils.c Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/libxl/libxl_utils.c Tue Jan 31 16:34:39 2012 +0000
@@ -557,6 +557,14 @@
return ERROR_FAIL;
}
+void libxl_cputopology_list_free(libxl_cputopology *list, int nr)
+{
+ int i;
+ for (i = 0; i < nr; i++)
+ libxl_cputopology_dispose(&list[i]);
+ free(list);
+}
+
/*
* Local variables:
* mode: C
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/libxl/xl_cmdimpl.c Tue Jan 31 16:34:39 2012 +0000
@@ -3833,10 +3833,11 @@
static void output_topologyinfo(void)
{
- libxl_topologyinfo info;
- int i;
-
- if (libxl_get_topologyinfo(ctx, &info)) {
+ libxl_cputopology *info;
+ int i, nr;
+
+ info = libxl_get_cpu_topology(ctx, &nr);
+ if (info == NULL) {
fprintf(stderr, "libxl_get_topologyinfo failed.\n");
return;
}
@@ -3844,16 +3845,16 @@
printf("cpu_topology :\n");
printf("cpu: core socket node\n");
- for (i = 0; i < info.coremap.entries; i++) {
- if (info.coremap.array[i] != LIBXL_CPUARRAY_INVALID_ENTRY)
- printf("%3d: %4d %4d %4d\n", i, info.coremap.array[i],
- info.socketmap.array[i], info.nodemap.array[i]);
- }
+ for (i = 0; i < nr; i++) {
+ if (info[i].core != LIBXL_CPUTOPOLOGY_INVALID_ENTRY)
+ printf("%3d: %4d %4d %4d\n", i,
+ info[i].core, info[i].socket, info[i].node);
+ }
+
+ libxl_cputopology_list_free(info, nr);
printf("numa_info : none\n");
- libxl_topologyinfo_dispose(&info);
-
return;
}
@@ -5350,7 +5351,7 @@
libxl_cpumap freemap;
libxl_cpumap cpumap;
libxl_uuid uuid;
- libxl_topologyinfo topology;
+ libxl_cputopology *topology;
while (1) {
opt = getopt_long(argc, argv, "hnf:", long_options, &option_index);
@@ -5459,16 +5460,18 @@
return -ERROR_FAIL;
}
if (!xlu_cfg_get_list(config, "nodes", &nodes, 0, 0)) {
+ int nr;
n_cpus = 0;
n_nodes = 0;
- if (libxl_get_topologyinfo(ctx, &topology)) {
+ topology = libxl_get_cpu_topology(ctx, &nr);
+ if (topology == NULL) {
fprintf(stderr, "libxl_get_topologyinfo failed\n");
return -ERROR_FAIL;
}
while ((buf = xlu_cfg_get_listitem(nodes, n_nodes)) != NULL) {
n = atoi(buf);
- for (i = 0; i < topology.nodemap.entries; i++) {
- if ((topology.nodemap.array[i] == n) &&
+ for (i = 0; i < nr; i++) {
+ if ((topology[i].node == n) &&
libxl_cpumap_test(&freemap, i)) {
libxl_cpumap_set(&cpumap, i);
n_cpus++;
@@ -5477,7 +5480,7 @@
n_nodes++;
}
- libxl_topologyinfo_dispose(&topology);
+ libxl_cputopology_list_free(topology, nr);
if (n_cpus == 0) {
fprintf(stderr, "no free cpu found\n");
@@ -5799,11 +5802,12 @@
int schedid;
int n_pools;
int node;
+ int n_cpus;
char name[16];
libxl_uuid uuid;
libxl_cpumap cpumap;
libxl_cpupoolinfo *poolinfo;
- libxl_topologyinfo topology;
+ libxl_cputopology *topology;
libxl_dominfo info;
if ((opt = def_getopt(argc, argv, "", "cpupool-numa-split", 0)) != -1)
@@ -5825,21 +5829,22 @@
return -ERROR_FAIL;
}
- if (libxl_get_topologyinfo(ctx, &topology)) {
+ topology = libxl_get_cpu_topology(ctx, &n_cpus);
+ if (topology == NULL) {
fprintf(stderr, "libxl_get_topologyinfo failed\n");
return -ERROR_FAIL;
}
if (libxl_cpumap_alloc(ctx, &cpumap)) {
fprintf(stderr, "Failed to allocate cpumap\n");
- libxl_topologyinfo_dispose(&topology);
+ libxl_cputopology_list_free(topology, n_cpus);
return -ERROR_FAIL;
}
/* Reset Pool-0 to 1st node: first add cpus, then remove cpus to avoid
a cpupool without cpus in between */
- node = topology.nodemap.array[0];
+ node = topology[0].node;
if (libxl_cpupool_cpuadd_node(ctx, 0, node, &n)) {
fprintf(stderr, "error on adding cpu to Pool 0\n");
return -ERROR_FAIL;
@@ -5853,9 +5858,9 @@
}
n = 0;
- for (c = 0; c < topology.nodemap.entries; c++) {
- if (topology.nodemap.array[c] == node) {
- topology.nodemap.array[c] = LIBXL_CPUARRAY_INVALID_ENTRY;
+ for (c = 0; c < n_cpus; c++) {
+ if (topology[c].node == node) {
+ topology[c].node = LIBXL_CPUTOPOLOGY_INVALID_ENTRY;
libxl_cpumap_set(&cpumap, n);
n++;
}
@@ -5880,12 +5885,12 @@
}
memset(cpumap.map, 0, cpumap.size);
- for (c = 0; c < topology.nodemap.entries; c++) {
- if (topology.nodemap.array[c] == LIBXL_CPUARRAY_INVALID_ENTRY) {
+ for (c = 0; c < n_cpus; c++) {
+ if (topology[c].node == LIBXL_CPUTOPOLOGY_INVALID_ENTRY) {
continue;
}
- node = topology.nodemap.array[c];
+ node = topology[c].node;
ret = -libxl_cpupool_cpuremove_node(ctx, 0, node, &n);
if (ret) {
fprintf(stderr, "error on removing cpu from Pool 0\n");
@@ -5907,15 +5912,15 @@
goto out;
}
- for (p = c; p < topology.nodemap.entries; p++) {
- if (topology.nodemap.array[p] == node) {
- topology.nodemap.array[p] = LIBXL_CPUARRAY_INVALID_ENTRY;
+ for (p = c; p < n_cpus; p++) {
+ if (topology[p].node == node) {
+ topology[p].node = LIBXL_CPUTOPOLOGY_INVALID_ENTRY;
}
}
}
out:
- libxl_topologyinfo_dispose(&topology);
+ libxl_cputopology_list_free(topology, n_cpus);
libxl_cpumap_dispose(&cpumap);
return ret;
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/ocaml/libs/xl/genwrap.py
--- a/tools/ocaml/libs/xl/genwrap.py Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/ocaml/libs/xl/genwrap.py Tue Jan 31 16:34:39 2012 +0000
@@ -29,6 +29,8 @@
"device_pci": DEVICE_FUNCTIONS,
"physinfo": [ ("get", ["unit", "t"]),
],
+ "cputopology": [ ("get", ["unit", "t array"]),
+ ],
"sched_credit": [ ("domain_get", ["domid", "t"]),
("domain_set", ["domid", "t", "unit"]),
],
@@ -266,7 +268,6 @@
"domain_create_info",
"domain_build_info",
"vcpuinfo",
- "topologyinfo",
"event",
]
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/ocaml/libs/xl/xenlight.ml.in
--- a/tools/ocaml/libs/xl/xenlight.ml.in Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/ocaml/libs/xl/xenlight.ml.in Tue Jan 31 16:34:39 2012 +0000
@@ -19,17 +19,6 @@
(* @@LIBXL_TYPES@@ *)
-module Topologyinfo = struct
- type t =
- {
- core : int;
- socket : int;
- node : int;
- }
- external get : unit -> t array = "stub_xl_topologyinfo"
-end
-
-
external send_trigger : domid -> trigger -> int -> unit =
"stub_xl_send_trigger"
external send_sysrq : domid -> char -> unit = "stub_xl_send_sysrq"
external send_debug_keys : domid -> string -> unit = "stub_xl_send_debug_keys"
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/ocaml/libs/xl/xenlight.mli.in
--- a/tools/ocaml/libs/xl/xenlight.mli.in Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/ocaml/libs/xl/xenlight.mli.in Tue Jan 31 16:34:39 2012 +0000
@@ -19,16 +19,6 @@
(* @@LIBXL_TYPES@@ *)
-module Topologyinfo : sig
- type t =
- {
- core : int;
- socket : int;
- node : int;
- }
- external get : unit -> t array = "stub_xl_topologyinfo"
-end
-
external send_trigger : domid -> trigger -> int -> unit =
"stub_xl_send_trigger"
external send_sysrq : domid -> char -> unit = "stub_xl_send_sysrq"
external send_debug_keys : domid -> string -> unit = "stub_xl_send_debug_keys"
diff -r bff9e4b818b9 -r 1d8f40029ddb tools/ocaml/libs/xl/xenlight_stubs.c
--- a/tools/ocaml/libs/xl/xenlight_stubs.c Tue Jan 31 16:34:39 2012 +0000
+++ b/tools/ocaml/libs/xl/xenlight_stubs.c Tue Jan 31 16:34:39 2012 +0000
@@ -210,28 +210,6 @@
#include "_libxl_types.inc"
-static value Val_topologyinfo(libxl_topologyinfo *c_val)
-{
- CAMLparam0();
- CAMLlocal3(v, topology, topologyinfo);
- int i;
-
- topologyinfo = caml_alloc_tuple(c_val->coremap.entries);
- for (i = 0; i < c_val->coremap.entries; i++) {
- v = Val_none;
- if (c_val->coremap.array[i] != LIBXL_CPUARRAY_INVALID_ENTRY) {
- topology = caml_alloc_tuple(3);
- Store_field(topology, 0,
Val_int(c_val->coremap.array[i]));
- Store_field(topology, 1,
Val_int(c_val->socketmap.array[i]));
- Store_field(topology, 2,
Val_int(c_val->nodemap.array[i]));
- v = Val_some(topology);
- }
- Store_field(topologyinfo, i, v);
- }
-
- CAMLreturn(topologyinfo);
-}
-
value stub_xl_device_disk_add(value info, value domid)
{
CAMLparam2(info, domid);
@@ -462,22 +440,33 @@
CAMLreturn(physinfo);
}
-value stub_xl_topologyinfo(value unit)
+value stub_xl_cputopology_get(value unit)
{
CAMLparam1(unit);
- CAMLlocal1(topologyinfo);
- libxl_topologyinfo c_topologyinfo;
- int ret;
+ CAMLlocal2(topology, v);
+ libxl_cputopology *c_topology;
+ int i, nr, ret;
INIT_STRUCT();
INIT_CTX();
- ret = libxl_get_topologyinfo(ctx, &c_topologyinfo);
+
+ c_topology = libxl_get_cpu_topology(ctx, &nr);
if (ret != 0)
failwith_xl("topologyinfo", &lg);
+
+ topology = caml_alloc_tuple(nr);
+ for (i = 0; i < nr; i++) {
+ if (c_topology[i].core != LIBXL_CPUTOPOLOGY_INVALID_ENTRY)
+ v = Val_some(Val_cputopology(&gc, &lg, &c_topology[i]));
+ else
+ v = Val_none;
+ Store_field(topology, i, v);
+ }
+
+ libxl_cputopology_list_free(c_topology, nr);
+
FREE_CTX();
-
- topologyinfo = Val_topologyinfo(&c_topologyinfo);
- CAMLreturn(topologyinfo);
+ CAMLreturn(topology);
}
value stub_xl_sched_credit_domain_get(value domid)
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