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提交 cc9f0521 编写于 作者: M Martin Kletzander
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Report more correct information for cache control 

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: NMartin Kletzander <mkletzan@redhat.com>
上级 ba326c86
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Showing with 104 addition and 16 deletion
docs/schemas/capability.rng
浏览文件 @ cc9f0521
......@@ -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>
......
src/conf/capabilities.c
浏览文件 @ cc9f0521
......@@ -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;
......
src/conf/capabilities.h
浏览文件 @ cc9f0521
......@@ -151,9 +151,14 @@ VIR_ENUM_DECL(virCache);
typedef struct _virCapsHostCacheControl virCapsHostCacheControl;
typedef virCapsHostCacheControl *virCapsHostCacheControlPtr;
struct _virCapsHostCacheControl {
unsigned long long min; /* minimum cache control size in B */
virCacheType scope; /* data, code or both */
unsigned int max_allocation; /* max number of supported allocations */
/* Smallest possible increase of the allocation size in bytes */
unsigned long long granularity;
/* Minimal allocatable size in bytes (if different from granularity) */
unsigned long long min;
/* Type of the allocation */
virCacheType scope;
/* Maximum number of simultaneous allocations */
unsigned int max_allocation;
};
typedef struct _virCapsHostCacheBank virCapsHostCacheBank;
......
tests/vircaps2xmldata/vircaps-x86_64-resctrl-cdp.xml
浏览文件 @ cc9f0521
......@@ -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>
......
tests/vircaps2xmldata/vircaps-x86_64-resctrl-skx.xml 0 → 100644
浏览文件 @ cc9f0521
<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='33792' unit='KiB' cpus='0'>
<control granularity='3072' unit='KiB' type='both' maxAllocs='16'/>
</bank>
</cache>
</host>
</capabilities>
tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml
浏览文件 @ cc9f0521
......@@ -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>
......
tests/vircaps2xmltest.c
浏览文件 @ cc9f0521
......@@ -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;
}
......
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