[libvirt] [PATCH] Report more correct information for cache control
Martin Kletzander
mkletzan at redhat.com
Mon Jun 5 13:14:51 UTC 2017
On some platforms the number of bits in the cbm_mask might not be
divisible by 4 (and not even by 2), so we need to properly count the
bits. Similar file, min_cbm_bits, is properly parsed and used, but if
the number is greater than one, we lose the information about
granularity when reporting the data in capabilities. For that matter
always report granularity, but if it is not the same as the minimum,
add that information in there as well.
Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
docs/schemas/capability.rng | 7 ++++-
src/conf/capabilities.c | 34 ++++++++++++++++++----
src/conf/capabilities.h | 1 +
.../linux-resctrl-skx/resctrl/info/L3/cbm_mask | 1 +
.../linux-resctrl-skx/resctrl/info/L3/min_cbm_bits | 1 +
.../linux-resctrl-skx/resctrl/info/L3/num_closids | 1 +
.../linux-resctrl-skx/resctrl/schemata | 1 +
.../system/cpu/cpu0/cache/index0/id | 1 +
.../system/cpu/cpu0/cache/index0/level | 1 +
.../system/cpu/cpu0/cache/index0/shared_cpu_list | 1 +
.../system/cpu/cpu0/cache/index0/shared_cpu_map | 1 +
.../system/cpu/cpu0/cache/index0/size | 1 +
.../system/cpu/cpu0/cache/index0/type | 1 +
.../linux-resctrl-skx/system/cpu/cpu0/online | 1 +
.../system/cpu/cpu0/topology/core_id | 1 +
.../system/cpu/cpu0/topology/core_siblings | 1 +
.../system/cpu/cpu0/topology/core_siblings_list | 1 +
.../system/cpu/cpu0/topology/physical_package_id | 1 +
.../system/cpu/cpu0/topology/thread_siblings | 1 +
.../system/cpu/cpu0/topology/thread_siblings_list | 1 +
.../linux-resctrl-skx/system/cpu/online | 1 +
.../linux-resctrl-skx/system/cpu/present | 1 +
.../linux-resctrl-skx/system/node/node0/cpu0 | 1 +
.../linux-resctrl-skx/system/node/node0/cpulist | 1 +
.../linux-resctrl-skx/system/node/node0/cpumap | 1 +
.../linux-resctrl-skx/system/node/node0/distance | 1 +
.../linux-resctrl-skx/system/node/online | 1 +
.../vircaps2xmldata/vircaps-x86_64-resctrl-cdp.xml | 8 ++---
.../vircaps2xmldata/vircaps-x86_64-resctrl-skx.xml | 31 ++++++++++++++++++++
tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml | 4 +--
tests/vircaps2xmltest.c | 1 +
31 files changed, 97 insertions(+), 13 deletions(-)
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/cbm_mask
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/min_cbm_bits
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/num_closids
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/resctrl/schemata
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/id
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/level
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/shared_cpu_list
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/shared_cpu_map
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/size
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/type
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/online
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_id
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_siblings
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_siblings_list
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/physical_package_id
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/thread_siblings
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/thread_siblings_list
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/online
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/present
create mode 120000 tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpu0
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpulist
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpumap
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/distance
create mode 100644 tests/vircaps2xmldata/linux-resctrl-skx/system/node/online
create mode 100644 tests/vircaps2xmldata/vircaps-x86_64-resctrl-skx.xml
diff --git a/docs/schemas/capability.rng b/docs/schemas/capability.rng
index e5cbfa362ec0..071090c2d991 100644
--- a/docs/schemas/capability.rng
+++ b/docs/schemas/capability.rng
@@ -273,9 +273,14 @@
</attribute>
<zeroOrMore>
<element name='control'>
- <attribute name='min'>
+ <attribute name='granularity'>
<ref name='unsignedInt'/>
</attribute>
+ <optional>
+ <attribute name='min'>
+ <ref name='unsignedInt'/>
+ </attribute>
+ </optional>
<attribute name='unit'>
<ref name='unit'/>
</attribute>
diff --git a/src/conf/capabilities.c b/src/conf/capabilities.c
index 3becc7e18c62..0f99f3096292 100644
--- a/src/conf/capabilities.c
+++ b/src/conf/capabilities.c
@@ -31,6 +31,7 @@
#include <unistd.h>
#include "capabilities.h"
+#include "c-ctype.h"
#include "count-one-bits.h"
#include "cpu_conf.h"
#include "domain_conf.h"
@@ -906,11 +907,24 @@ virCapabilitiesFormatCaches(virBufferPtr buf,
virBufferAdjustIndent(&controlBuf, indent + 4);
for (j = 0; j < bank->ncontrols; j++) {
- bool min_kilos = !(bank->controls[j]->min % 1024);
+ bool min_kilos = !(bank->controls[j]->granularity % 1024);
+
+ /* Only use KiB if both values are divisible */
+ if (bank->controls[j]->min)
+ min_kilos = min_kilos && !(bank->controls[j]->min % 1024);
+
+ virBufferAsprintf(&controlBuf,
+ "<control granularity='%llu'",
+ bank->controls[j]->granularity >> (min_kilos * 10));
+
+ if (bank->controls[j]->min) {
+ virBufferAsprintf(&controlBuf,
+ " min='%llu'",
+ bank->controls[j]->min >> (min_kilos * 10));
+ }
+
virBufferAsprintf(&controlBuf,
- "<control min='%llu' unit='%s' "
- "type='%s' maxAllocs='%u'/>\n",
- bank->controls[j]->min >> (min_kilos * 10),
+ " unit='%s' type='%s' maxAllocs='%u'/>\n",
min_kilos ? "KiB" : "B",
virCacheTypeToString(bank->controls[j]->scope),
bank->controls[j]->max_allocation);
@@ -1598,9 +1612,11 @@ virCapabilitiesGetCacheControl(virCapsHostCacheBankPtr bank,
virCacheType scope)
{
int ret = -1;
+ char *tmp = NULL;
char *path = NULL;
char *cbm_mask = NULL;
char *type_upper = NULL;
+ unsigned int bits = 0;
unsigned int min_cbm_bits = 0;
virCapsHostCacheControlPtr control;
@@ -1632,8 +1648,14 @@ virCapabilitiesGetCacheControl(virCapsHostCacheBankPtr bank,
virStringTrimOptionalNewline(cbm_mask);
- /* cbm_mask: cache bit mask, it's in hex, eg: fffff */
- control->min = min_cbm_bits * bank->size / (strlen(cbm_mask) * 4);
+ for (tmp = cbm_mask; *tmp != '\0'; tmp++) {
+ if (c_isxdigit(*tmp))
+ bits += count_one_bits(virHexToBin(*tmp));
+ }
+
+ control->granularity = bank->size / bits;
+ if (min_cbm_bits != 1)
+ control->min = min_cbm_bits * control->granularity;
control->scope = scope;
diff --git a/src/conf/capabilities.h b/src/conf/capabilities.h
index ee87d598ef66..d4753db0beec 100644
--- a/src/conf/capabilities.h
+++ b/src/conf/capabilities.h
@@ -152,6 +152,7 @@ typedef struct _virCapsHostCacheControl virCapsHostCacheControl;
typedef virCapsHostCacheControl *virCapsHostCacheControlPtr;
struct _virCapsHostCacheControl {
unsigned long long min; /* minimum cache control size in B */
+ unsigned long long granularity; /* minimum increase step for min in B */
virCacheType scope; /* data, code or both */
unsigned int max_allocation; /* max number of supported allocations */
};
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/cbm_mask b/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/cbm_mask
new file mode 100644
index 000000000000..d482bbb26931
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/cbm_mask
@@ -0,0 +1 @@
+7ff
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/min_cbm_bits b/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/min_cbm_bits
new file mode 100644
index 000000000000..d00491fd7e5b
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/min_cbm_bits
@@ -0,0 +1 @@
+1
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/num_closids b/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/num_closids
new file mode 100644
index 000000000000..b6a7d89c68e0
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/info/L3/num_closids
@@ -0,0 +1 @@
+16
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/schemata b/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/schemata
new file mode 100644
index 000000000000..4a4913735386
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/resctrl/schemata
@@ -0,0 +1 @@
+L3:0=7ff;1=7ff
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/id b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/id
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/id
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/level b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/level
new file mode 100644
index 000000000000..00750edc07d6
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/level
@@ -0,0 +1 @@
+3
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/shared_cpu_list b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/shared_cpu_list
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/shared_cpu_list
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/shared_cpu_map b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/shared_cpu_map
new file mode 100644
index 000000000000..5325a8dff751
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/shared_cpu_map
@@ -0,0 +1 @@
+001
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/size b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/size
new file mode 100644
index 000000000000..24a7d60e7fb9
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/size
@@ -0,0 +1 @@
+11264K
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/type b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/type
new file mode 100644
index 000000000000..e4fd9dccda2c
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/cache/index0/type
@@ -0,0 +1 @@
+Unified
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/online b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/online
new file mode 100644
index 000000000000..d00491fd7e5b
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/online
@@ -0,0 +1 @@
+1
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_id b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_id
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_id
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_siblings b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_siblings
new file mode 100644
index 000000000000..5325a8dff751
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_siblings
@@ -0,0 +1 @@
+001
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_siblings_list b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_siblings_list
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/core_siblings_list
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/physical_package_id b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/physical_package_id
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/physical_package_id
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/thread_siblings b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/thread_siblings
new file mode 100644
index 000000000000..5325a8dff751
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/thread_siblings
@@ -0,0 +1 @@
+001
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/thread_siblings_list b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/thread_siblings_list
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/cpu0/topology/thread_siblings_list
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/online b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/online
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/online
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/present b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/present
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/cpu/present
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpu0 b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpu0
new file mode 120000
index 000000000000..c841bea28b2b
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpu0
@@ -0,0 +1 @@
+../../cpu/cpu0
\ No newline at end of file
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpulist b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpulist
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpulist
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpumap b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpumap
new file mode 100644
index 000000000000..5325a8dff751
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/cpumap
@@ -0,0 +1 @@
+001
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/distance b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/distance
new file mode 100644
index 000000000000..f599e28b8ab0
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/node0/distance
@@ -0,0 +1 @@
+10
diff --git a/tests/vircaps2xmldata/linux-resctrl-skx/system/node/online b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/online
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/tests/vircaps2xmldata/linux-resctrl-skx/system/node/online
@@ -0,0 +1 @@
+0
diff --git a/tests/vircaps2xmldata/vircaps-x86_64-resctrl-cdp.xml b/tests/vircaps2xmldata/vircaps-x86_64-resctrl-cdp.xml
index 49aa0b98ca88..7361537bfb56 100644
--- a/tests/vircaps2xmldata/vircaps-x86_64-resctrl-cdp.xml
+++ b/tests/vircaps2xmldata/vircaps-x86_64-resctrl-cdp.xml
@@ -42,12 +42,12 @@
</topology>
<cache>
<bank id='0' level='3' type='both' size='15360' unit='KiB' cpus='0-5'>
- <control min='768' unit='KiB' type='code' maxAllocs='8'/>
- <control min='768' unit='KiB' type='data' maxAllocs='8'/>
+ <control granularity='768' unit='KiB' type='code' maxAllocs='8'/>
+ <control granularity='768' unit='KiB' type='data' maxAllocs='8'/>
</bank>
<bank id='1' level='3' type='both' size='15360' unit='KiB' cpus='6-11'>
- <control min='768' unit='KiB' type='code' maxAllocs='8'/>
- <control min='768' unit='KiB' type='data' maxAllocs='8'/>
+ <control granularity='768' unit='KiB' type='code' maxAllocs='8'/>
+ <control granularity='768' unit='KiB' type='data' maxAllocs='8'/>
</bank>
</cache>
</host>
diff --git a/tests/vircaps2xmldata/vircaps-x86_64-resctrl-skx.xml b/tests/vircaps2xmldata/vircaps-x86_64-resctrl-skx.xml
new file mode 100644
index 000000000000..f582581148f7
--- /dev/null
+++ b/tests/vircaps2xmldata/vircaps-x86_64-resctrl-skx.xml
@@ -0,0 +1,31 @@
+<capabilities>
+
+ <host>
+ <cpu>
+ <arch>x86_64</arch>
+ </cpu>
+ <power_management/>
+ <migration_features>
+ <live/>
+ </migration_features>
+ <topology>
+ <cells num='1'>
+ <cell id='0'>
+ <memory unit='KiB'>1048576</memory>
+ <pages unit='KiB' size='4'>2048</pages>
+ <pages unit='KiB' size='2048'>4096</pages>
+ <pages unit='KiB' size='1048576'>6144</pages>
+ <cpus num='1'>
+ <cpu id='0' socket_id='0' core_id='0' siblings='0'/>
+ </cpus>
+ </cell>
+ </cells>
+ </topology>
+ <cache>
+ <bank id='0' level='3' type='both' size='11264' unit='KiB' cpus='0'>
+ <control granularity='1024' unit='KiB' type='both' maxAllocs='16'/>
+ </bank>
+ </cache>
+ </host>
+
+</capabilities>
diff --git a/tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml b/tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml
index cb78b4ab788d..eb02ad3322a2 100644
--- a/tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml
+++ b/tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml
@@ -42,10 +42,10 @@
</topology>
<cache>
<bank id='0' level='3' type='both' size='15360' unit='KiB' cpus='0-5'>
- <control min='1536' unit='KiB' type='both' maxAllocs='4'/>
+ <control granularity='768' min='1536' unit='KiB' type='both' maxAllocs='4'/>
</bank>
<bank id='1' level='3' type='both' size='15360' unit='KiB' cpus='6-11'>
- <control min='1536' unit='KiB' type='both' maxAllocs='4'/>
+ <control granularity='768' min='1536' unit='KiB' type='both' maxAllocs='4'/>
</bank>
</cache>
</host>
diff --git a/tests/vircaps2xmltest.c b/tests/vircaps2xmltest.c
index ae1cd521111e..c0a67858fec3 100644
--- a/tests/vircaps2xmltest.c
+++ b/tests/vircaps2xmltest.c
@@ -120,6 +120,7 @@ mymain(void)
DO_TEST_FULL("resctrl", VIR_ARCH_X86_64, true, true, true);
DO_TEST_FULL("resctrl-cdp", VIR_ARCH_X86_64, true, true, true);
+ DO_TEST_FULL("resctrl-skx", VIR_ARCH_X86_64, true, true, true);
return ret;
}
--
2.13.0
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