From: Liu Jingqi <jingqi....@intel.com>
Add -numa hmat-lb option to provide System Locality Latency and
Bandwidth Information. These memory attributes help to build
System Locality Latency and Bandwidth Information Structure(s)
in ACPI Heterogeneous Memory Attribute Table (HMAT).
Signed-off-by: Liu Jingqi <jingqi....@intel.com>
Signed-off-by: Tao Xu <tao3...@intel.com>
---
numa.c | 124 ++++++++++++++++++++++++++++++++++++++++++++++++
qapi/misc.json | 94 +++++++++++++++++++++++++++++++++++-
qemu-options.hx | 28 ++++++++++-
3 files changed, 243 insertions(+), 3 deletions(-)
diff --git a/numa.c b/numa.c
index 9ee4f6f258..97b77356ad 100644
--- a/numa.c
+++ b/numa.c
@@ -40,6 +40,7 @@
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu/cutils.h"
+#include "hw/acpi/hmat.h"
QemuOptsList qemu_numa_opts = {
.name = "numa",
@@ -180,6 +181,123 @@ static void parse_numa_distance(NumaDistOptions *dist,
Error **errp)
have_numa_distance = true;
}
+static void parse_numa_hmat_lb(MachineState *ms, NumaHmatLBOptions *node,
+ Error **errp)
+{
+ struct numa_hmat_lb_info *hmat_lb = 0;
+
+ if (node->data_type <= HMATLB_DATA_TYPE_WRITE_LATENCY) {
+ if (!node->has_latency) {
+ error_setg(errp, "Please specify the latency.");
+ return;
+ }
+ if (node->has_bandwidth) {
+ error_setg(errp, "Please do not specify the bandwidth "
+ "since the data type is latency.");
+ return;
+ }
+ if (node->has_base_bw) {
+ error_setg(errp, "Please do not specify the base-bw "
+ "since the data type is latency.");
+ return;
+ }
+ }
+
+ if (node->data_type >= HMATLB_DATA_TYPE_ACCESS_BANDWIDTH) {
+ if (!node->has_bandwidth) {
+ error_setg(errp, "Please specify the bandwidth.");
+ return;
+ }
+ if (node->has_latency) {
+ error_setg(errp, "Please do not specify the latency "
+ "since the data type is bandwidth.");
+ return;
+ }
+ if (node->has_base_lat) {
+ error_setg(errp, "Please do not specify the base-lat "
+ "since the data type is bandwidth.");
+ return;
+ }
+ }
+
+ if (node->initiator >= nb_numa_nodes) {
+ error_setg(errp, "Invalid initiator=%"
+ PRIu16 ", it should be less than %d.",
+ node->initiator, nb_numa_nodes);
+ return;
+ }
+ if (!numa_info[node->initiator].is_initiator) {
+ error_setg(errp, "Invalid initiator=%"
+ PRIu16 ", it isn't an initiator proximity domain.",
+ node->initiator);
+ return;
+ }
+
+ if (node->target >= nb_numa_nodes) {
+ error_setg(errp, "Invalid initiator=%"
+ PRIu16 ", it should be less than %d.",
+ node->target, nb_numa_nodes);
+ return;
+ }
+ if (!numa_info[node->target].is_target) {
+ error_setg(errp, "Invalid target=%"
+ PRIu16 ", it isn't a target proximity domain.",
+ node->target);
+ return;
+ }
+
+ if (node->has_latency) {
+ hmat_lb = hmat_lb_info[node->hierarchy][node->data_type];
+ if (!hmat_lb) {
+ hmat_lb = g_malloc0(sizeof(*hmat_lb));
+ hmat_lb_info[node->hierarchy][node->data_type] = hmat_lb;
+ } else if (hmat_lb->latency[node->initiator][node->target]) {
+ error_setg(errp, "Duplicate configuration of the latency for "
+ "initiator=%" PRIu16 " and target=%" PRIu16 ".",
+ node->initiator, node->target);
+ return;
+ }
+
+ /* Only the first time of setting the base unit is valid. */
+ if ((hmat_lb->base_lat == 0) && (node->has_base_lat)) {
+ hmat_lb->base_lat = node->base_lat;
+ }
+
+ hmat_lb->latency[node->initiator][node->target] = node->latency;
+ }
+
+ if (node->has_bandwidth) {
+ hmat_lb = hmat_lb_info[node->hierarchy][node->data_type];
+
+ if (!hmat_lb) {
+ hmat_lb = g_malloc0(sizeof(*hmat_lb));
+ hmat_lb_info[node->hierarchy][node->data_type] = hmat_lb;
+ } else if (hmat_lb->bandwidth[node->initiator][node->target]) {
+ error_setg(errp, "Duplicate configuration of the bandwidth for "
+ "initiator=%" PRIu16 " and target=%" PRIu16 ".",
+ node->initiator, node->target);
+ return;
+ }
+
+ /* Only the first time of setting the base unit is valid. */
+ if (hmat_lb->base_bw == 0) {
+ if (!node->has_base_bw) {
+ error_setg(errp, "Please provide the base-bw!");
+ return;
+ } else {
+ hmat_lb->base_bw = node->base_bw;
+ }
+ }
+
+ hmat_lb->bandwidth[node->initiator][node->target] = node->bandwidth;
+ }
+
+ if (hmat_lb) {
+ hmat_lb->hierarchy = node->hierarchy;
+ hmat_lb->data_type = node->data_type;
+ }
+}
+
static
void set_numa_options(MachineState *ms, NumaOptions *object, Error **errp)
{
@@ -213,6 +331,12 @@ void set_numa_options(MachineState *ms, NumaOptions
*object, Error **errp)
machine_set_cpu_numa_node(ms, qapi_NumaCpuOptions_base(&object->u.cpu),
&err);
break;
+ case NUMA_OPTIONS_TYPE_HMAT_LB:
+ parse_numa_hmat_lb(ms, &object->u.hmat_lb, &err);
+ if (err) {
+ goto end;
+ }
+ break;
default:
abort();
}
diff --git a/qapi/misc.json b/qapi/misc.json
index 426274ecf8..10ba90bb39 100644
--- a/qapi/misc.json
+++ b/qapi/misc.json
@@ -2782,10 +2782,12 @@
#
# @cpu: property based CPU(s) to node mapping (Since: 2.10)
#
+# @hmat-lb: memory latency and bandwidth information (Since: 4.0)
+#
# Since: 2.1
##
{ 'enum': 'NumaOptionsType',
- 'data': [ 'node', 'dist', 'cpu' ] }
+ 'data': [ 'node', 'dist', 'cpu', 'hmat-lb' ] }
##
# @NumaOptions:
@@ -2800,7 +2802,8 @@
'data': {
'node': 'NumaNodeOptions',
'dist': 'NumaDistOptions',
- 'cpu': 'NumaCpuOptions' }}
+ 'cpu': 'NumaCpuOptions',
+ 'hmat-lb': 'NumaHmatLBOptions' }}
##
# @NumaNodeOptions:
@@ -2863,6 +2866,93 @@
'base': 'CpuInstanceProperties',
'data' : {} }
+##
+# @HmatLBMemoryHierarchy:
+#
+# The memory hierarchy in the System Locality Latency
+# and Bandwidth Information Structure of HMAT (Heterogeneous
+# Memory Attribute Table)
+#
+# @memory: the structure represents the memory performance
+#
+# @last-level: last level memory of memory side cached memory
+#
+# @first-level: first level memory of memory side cached memory
+#
+# @second-level: second level memory of memory side cached memory
+#
+# @third-level: third level memory of memory side cached memory
+#
+# Since: 4.0
+##
+{ 'enum': 'HmatLBMemoryHierarchy',
+ 'data': [ 'memory', 'last-level', 'first-level',
+ 'second-level', 'third-level' ] }
+
+##
+# @HmatLBDataType:
+#
+# Data type in the System Locality Latency
+# and Bandwidth Information Structure of HMAT (Heterogeneous
+# Memory Attribute Table)
+#
+# @access-latency: access latency (nanoseconds)
+#
+# @read-latency: read latency (nanoseconds)
+#
+# @write-latency: write latency (nanoseconds)
+#
+# @access-bandwidth: access bandwidth (MB/s)
+#
+# @read-bandwidth: read bandwidth (MB/s)
+#
+# @write-bandwidth: write bandwidth (MB/s)
+#
+# Since: 4.0
+##
+{ 'enum': 'HmatLBDataType',
+ 'data': [ 'access-latency', 'read-latency', 'write-latency',
+ 'access-bandwidth', 'read-bandwidth', 'write-bandwidth' ] }
+
+##
+# @NumaHmatLBOptions:
+#
+# Set the system locality latency and bandwidth information
+# between Initiator and Target proximity Domains.
+#
+# @initiator: the Initiator Proximity Domain.
+#
+# @target: the Target Proximity Domain.
+#
+# @hierarchy: the Memory Hierarchy. Indicates the performance
+# of memory or side cache.
+#
+# @data-type: presents the type of data, access/read/write
+# latency or hit latency.
+#
+# @base-lat: the base unit for latency in nanoseconds.
+#
+# @base-bw: the base unit for bandwidth in megabytes per second(MB/s).
+#
+# @latency: the value of latency based on Base Unit from @initiator
+# to @target proximity domain.
+#
+# @bandwidth: the value of bandwidth based on Base Unit between
+# @initiator and @target proximity domain.
+#
+# Since: 4.0
+##
+{ 'struct': 'NumaHmatLBOptions',
+ 'data': {
+ 'initiator': 'uint16',
+ 'target': 'uint16',
+ 'hierarchy': 'HmatLBMemoryHierarchy',
+ 'data-type': 'HmatLBDataType',
+ '*base-lat': 'uint64',
+ '*base-bw': 'uint64',
+ '*latency': 'uint16',
+ '*bandwidth': 'uint16' }}
+
##
# @HostMemPolicy:
#
diff --git a/qemu-options.hx b/qemu-options.hx
index 521511ec13..fec20a93e7 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -163,16 +163,19 @@ DEF("numa", HAS_ARG, QEMU_OPTION_numa,
"-numa node[,mem=size][,cpus=firstcpu[-lastcpu]][,nodeid=node]\n"
"-numa node[,memdev=id][,cpus=firstcpu[-lastcpu]][,nodeid=node]\n"
"-numa dist,src=source,dst=destination,val=distance\n"
- "-numa cpu,node-id=node[,socket-id=x][,core-id=y][,thread-id=z]\n",
+ "-numa cpu,node-id=node[,socket-id=x][,core-id=y][,thread-id=z]\n"
+ "-numa
hmat-lb,initiator=node,target=node,hierarchy=memory|last-level,data-type=access-latency|read-latency|write-latency[,base-lat=blat][,base-bw=bbw][,latency=lat][,bandwidth=bw]\n",
QEMU_ARCH_ALL)
STEXI
@item -numa
node[,mem=@var{size}][,cpus=@var{firstcpu}[-@var{lastcpu}]][,nodeid=@var{node}]
@itemx -numa
node[,memdev=@var{id}][,cpus=@var{firstcpu}[-@var{lastcpu}]][,nodeid=@var{node}]
@itemx -numa dist,src=@var{source},dst=@var{destination},val=@var{distance}
@itemx -numa
cpu,node-id=@var{node}[,socket-id=@var{x}][,core-id=@var{y}][,thread-id=@var{z}]
+@itemx -numa
hmat-lb,initiator=@var{node},target=@var{node},hierarchy=@var{str},data-type=@var{str}[,base-lat=@var{blat}][,base-bw=@var{bbw}][,latency=@var{lat}][,bandwidth=@var{bw}]
@findex -numa
Define a NUMA node and assign RAM and VCPUs to it.
Set the NUMA distance from a source node to a destination node.
+Set the ACPI Heterogeneous Memory Attribute for the given nodes.
Legacy VCPU assignment uses @samp{cpus} option where
@var{firstcpu} and @var{lastcpu} are CPU indexes. Each
@@ -230,6 +233,29 @@ specified resources, it just assigns existing resources to
NUMA
nodes. This means that one still has to use the @option{-m},
@option{-smp} options to allocate RAM and VCPUs respectively.
+Use 'hmat-lb' to set System Locality Latency and Bandwidth Information
+between initiator NUMA node and target NUMA node to build ACPI Heterogeneous
Attribute Memory Table (HMAT).
+Initiator NUMA node can create memory requests, usually including one or more
processors.
+Target NUMA node contains addressable memory.
+
+For example:
+@example
+-m 2G \
+-smp 3,sockets=2,maxcpus=3 \
+-numa node,cpus=0-1,nodeid=0 \
+-numa node,mem=1G,cpus=2,nodeid=1 \
+-numa node,mem=1G,nodeid=2 \
+-numa
hmat-lb,initiator=0,target=1,hierarchy=memory,data-type=access-latency,base-lat=10,base-bw=20,latency=10,bandwidth=10
\
+-numa
hmat-lb,initiator=1,target=2,hierarchy=first-level,data-type=access-latency,base-bw=10,bandwidth=20
+@end example
+
+When the processors in NUMA node 0 access memory in NUMA node 1,
+the first line containing 'hmat-lb' sets the latency and bandwidth information.
+The latency is @var{lat} multiplied by @var{blat} and the bandwidth is
@var{bw} multiplied by @var{bbw}.
+
+When the processors in NUMA node 1 access memory in NUMA node 2 that acts as
2nd level memory side cache,
+the second line containing 'hmat-lb' sets the access hit bandwidth information.
+
ETEXI
DEF("add-fd", HAS_ARG, QEMU_OPTION_add_fd,
--
2.17.1
