9:47 p.m.
This patch expose cache information to host's capabilites xml.
For l3 cache allocation
<cache>
<bank id='0' type='l3' size='56320' unit='KiB'
cpus='0-21,44-65'>
<control min='2816' reserved='2816' unit='KiB'
scope='L3'/>
</bank>
<bank id='1' type='l3' size='56320' unit='KiB'
cpus='22-43,66-87'>
<control min='2816' reserved='2816' unit='KiB'
scope='L3'/>
</bank>
</cache>
For l3 cache allocation supported cdp(seperate data/code):
<cache>
<bank id='0' type='l3' size='56320' unit='KiB'
cpus='0-21,44-65'>
<control min='2816' reserved='2816' unit='KiB'
scope='L3DATA'/>
<control min='2816' reserved='2816' unit='KiB'
scope='L3CODE'/>
</bank>
<bank id='1' type='l3' size='56320' unit='KiB'
cpus='22-43,66-87'>
<control min='2816' reserved='2816' unit='KiB'
scope='L3DATA'/>
<control min='2816' reserved='2816' unit='KiB'
scope='L3CODE'/>
</bank>
</cache>
RFC on mailing list.
https://www.redhat.com/archives/libvir-list/2017-January/msg00644.html
Signed-off-by: Eli Qiao <liyong.qiao(a)intel.com>
---
src/conf/capabilities.c | 56 ++++++++++++++++++++++++++++++++++++
src/conf/capabilities.h | 23 +++++++++++++++
src/libvirt_private.syms | 1 +
src/qemu/qemu_capabilities.c | 68 ++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_driver.c | 4 +++
5 files changed, 152 insertions(+)
diff --git a/src/conf/capabilities.c b/src/conf/capabilities.c
index 9ab343b..290c25f 100644
--- a/src/conf/capabilities.c
+++ b/src/conf/capabilities.c
@@ -198,6 +198,18 @@ virCapabilitiesClearSecModel(virCapsHostSecModelPtr secmodel)
}
static void
+virCapabilitiesClearCacheBank(virCapsHostCacheBankPtr cachebank)
+{
+ size_t i;
+ for (i = 0; i < cachebank->ncontrol; i++) {
+ VIR_FREE(cachebank->control[i].scope);
+ }
+ VIR_FREE(cachebank->type);
+ VIR_FREE(cachebank->cpus);
+}
+
+
+static void
virCapabilitiesDispose(void *object)
{
virCapsPtr caps = object;
@@ -221,6 +233,10 @@ virCapabilitiesDispose(void *object)
virCapabilitiesClearSecModel(&caps->host.secModels[i]);
VIR_FREE(caps->host.secModels);
+ for (i = 0; i < caps->host.ncachebank; i++)
+ virCapabilitiesClearCacheBank(caps->host.cachebank[i]);
+ VIR_FREE(caps->host.cachebank);
+
VIR_FREE(caps->host.netprefix);
VIR_FREE(caps->host.pagesSize);
virCPUDefFree(caps->host.cpu);
@@ -844,6 +860,41 @@ virCapabilitiesFormatNUMATopology(virBufferPtr buf,
return 0;
}
+static int
+virCapabilitiesFormatCache(virBufferPtr buf,
+ size_t ncachebank,
+ virCapsHostCacheBankPtr *cachebank)
+{
+ size_t i;
+ size_t j;
+
+ virBufferAddLit(buf, "<cache>\n");
+ virBufferAdjustIndent(buf, 2);
+
+ for( i = 0 ; i < ncachebank; i++) {
+ virBufferAsprintf(buf,
+ "<bank id='%u' type='%s'
size='%llu' unit='KiB' cpus='%s'>\n",
+ cachebank[i]->id,
+ cachebank[i]->type,
+ cachebank[i]->size,
+ cachebank[i]->cpus);
+
+ virBufferAdjustIndent(buf, 2);
+ for( j = 0; j < cachebank[i]->ncontrol; j ++) {
+ virBufferAsprintf(buf,
+ "<control min='%llu'
reserved='%llu' unit='KiB' scope='%s'/>\n",
+ cachebank[i]->control[j].min,
+ cachebank[i]->control[j].reserved,
+ cachebank[i]->control[j].scope);
+ }
+ virBufferAdjustIndent(buf, -2);
+ virBufferAddLit(buf, "</bank>\n");
+ }
+ virBufferAdjustIndent(buf, -2);
+ virBufferAddLit(buf, "</cache>\n");
+ return 0;
+}
+
/**
* virCapabilitiesFormatXML:
* @caps: capabilities to format
@@ -931,6 +982,11 @@ virCapabilitiesFormatXML(virCapsPtr caps)
virBufferAddLit(&buf, "</migration_features>\n");
}
+ if (caps->host.ncachebank &&
+ virCapabilitiesFormatCache(&buf, caps->host.ncachebank,
+ caps->host.cachebank) < 0)
+ return NULL;
+
if (caps->host.netprefix)
virBufferAsprintf(&buf, "<netprefix>%s</netprefix>\n",
caps->host.netprefix);
diff --git a/src/conf/capabilities.h b/src/conf/capabilities.h
index cfdc34a..b446de5 100644
--- a/src/conf/capabilities.h
+++ b/src/conf/capabilities.h
@@ -138,6 +138,25 @@ struct _virCapsHostSecModel {
virCapsHostSecModelLabelPtr labels;
};
+typedef struct _virCapsHostCacheControl virCapsHostCacheControl;
+typedef virCapsHostCacheControl *virCapsHostCacheControlPtr;
+struct _virCapsHostCacheControl {
+ unsigned long long min;
+ unsigned long long reserved;
+ char* scope;
+};
+
+typedef struct _virCapsHostCacheBank virCapsHostCacheBank;
+typedef virCapsHostCacheBank *virCapsHostCacheBankPtr;
+struct _virCapsHostCacheBank {
+ unsigned int id;
+ char* type;
+ char* cpus;
+ unsigned long long size;
+ size_t ncontrol;
+ virCapsHostCacheControlPtr control;
+};
+
typedef struct _virCapsHost virCapsHost;
typedef virCapsHost *virCapsHostPtr;
struct _virCapsHost {
@@ -160,6 +179,10 @@ struct _virCapsHost {
size_t nsecModels;
virCapsHostSecModelPtr secModels;
+ size_t ncachebank;
+ size_t ncachebank_max;
+ virCapsHostCacheBankPtr *cachebank;
+
char *netprefix;
virCPUDefPtr cpu;
int nPagesSize; /* size of pagesSize array */
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 743e5ac..d93b775 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2316,6 +2316,7 @@ virRandomInt;
# util/virresctrl.h
virResCtrlAvailable;
virResCtrlInit;
+virResCtrlGet;
# util/virrotatingfile.h
virRotatingFileReaderConsume;
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 3247d25..23f416d 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -45,6 +45,7 @@
#include "qemu_domain.h"
#define __QEMU_CAPSRIV_H_ALLOW__
#include "qemu_capspriv.h"
+#include "virresctrl.h"
#include <fcntl.h>
#include <sys/stat.h>
@@ -1098,7 +1099,71 @@ virQEMUCapsInitCPU(virCapsPtr caps,
goto cleanup;
}
+static int
+virQEMUCapsInitCache(virCapsPtr caps)
+{
+ int i, j;
+ virResCtrlPtr resctrl;
+ virCapsHostCacheBankPtr bank;
+
+ for (i = 0; i < RDT_NUM_RESOURCES; i ++)
+ {
+ /* L3DATA and L3CODE share L3 resources */
+ if ( i == RDT_RESOURCE_L3CODE )
+ continue;
+ resctrl = virResCtrlGet(i);
+
+ if(resctrl->enabled) {
+ for( j = 0; j < resctrl->num_banks; j++)
+ {
+ if(VIR_RESIZE_N(caps->host.cachebank, caps->host.ncachebank_max,
+ caps->host.ncachebank, 1) < 0)
+ return -1;
+
+ if(VIR_ALLOC(bank) < 0)
+ return -1;
+
+ bank->id = resctrl->cache_banks[j].host_id;
+ if(VIR_STRDUP(bank->type, resctrl->cache_level) < 0)
+ goto err;
+ if(VIR_STRDUP(bank->cpus,
virBitmapFormat(resctrl->cache_banks[j].cpu_mask)) < 0)
+ goto err;
+ bank->size = resctrl->cache_banks[j].cache_size;
+ /*L3DATA and L3CODE shares L3 cache resources, so fill them to the
control element*/
+ if ( i == RDT_RESOURCE_L3DATA ) {
+ if(VIR_EXPAND_N(bank->control, bank->ncontrol, 2) < 0)
+ goto err;
+
+ bank->control[0].min =
virResCtrlGet(RDT_RESOURCE_L3DATA)->cache_banks[j].cache_min;
+ bank->control[0].reserved = bank->control[0].min *
(virResCtrlGet(RDT_RESOURCE_L3DATA)->min_cbm_bits);
+ if(VIR_STRDUP(bank->control[0].scope,
+ virResCtrlGet(RDT_RESOURCE_L3DATA)->name) < 0)
+ goto err;
+
+ bank->control[1].min =
virResCtrlGet(RDT_RESOURCE_L3CODE)->cache_banks[j].cache_min;
+ bank->control[1].reserved = bank->control[1].min *
(virResCtrlGet(RDT_RESOURCE_L3CODE)->min_cbm_bits);
+ if(VIR_STRDUP(bank->control[1].scope,
+ virResCtrlGet(RDT_RESOURCE_L3CODE)->name) < 0)
+ goto err;
+ }
+ else {
+ if(VIR_EXPAND_N(bank->control, bank->ncontrol, 1) < 0)
+ goto err;
+ bank->control[0].min = resctrl->cache_banks[j].cache_min;
+ bank->control[0].reserved = bank->control[0].min *
resctrl->min_cbm_bits;
+ if(VIR_STRDUP(bank->control[0].scope, resctrl->name) < 0)
+ goto err;
+ }
+ caps->host.cachebank[caps->host.ncachebank++] = bank;
+ }
+ }
+ }
+ return 0;
+err:
+ VIR_FREE(bank);
+ return -1;
+}
static int
virQEMUCapsInitPages(virCapsPtr caps)
{
@@ -1144,6 +1209,9 @@ virCapsPtr virQEMUCapsInit(virQEMUCapsCachePtr cache)
if (virQEMUCapsInitCPU(caps, hostarch) < 0)
VIR_WARN("Failed to get host CPU");
+ if (virQEMUCapsInitCache(caps) < 0)
+ VIR_WARN("Failed to get host cache");
+
/* Add the power management features of the host */
if (virNodeSuspendGetTargetMask(&caps->host.powerMgmt) < 0)
VIR_WARN("Failed to get host power management capabilities");
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 37ccfdf..520b74d 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -105,6 +105,7 @@
#include "vircgroup.h"
#include "virperf.h"
#include "virnuma.h"
+#include "virresctrl.h"
#include "dirname.h"
#include "network/bridge_driver.h"
@@ -849,6 +850,9 @@ qemuStateInitialize(bool privileged,
run_gid = cfg->group;
}
+ if(virResCtrlAvailable() && virResCtrlInit() < 0)
+ VIR_WARN("Faild to initialize resource control.");
+
qemu_driver->qemuCapsCache = virQEMUCapsCacheNew(cfg->libDir,
cfg->cacheDir,
run_uid,
--
1.9.1