On Thu, Apr 06, 2017 at 04:20:06PM +0800, Eli Qiao wrote:
This patch is based on Martin's cache branch. This patch amends the cache bank capability as follow: <bank id='0' level='3' type='unified' size='15360' unit='KiB' cpus='0-5'/> <control min='768' unit='KiB' type='unified' nclos='4'/> <bank id='1' level='3' type='unified' size='15360' unit='KiB' cpus='6-11'/> <control min='768' unit='KiB' type='unified' nclos='4'/>
Were we exposing the number of CLoS IDs before? Was there a discussion about it? Do we want to expose them? Probably yes, I'm just wondering.
Along with vircaps2xmltest case updated.
Signed-off-by: Eli Qiao <liyong.qiao@xxxxxxxxx>
---
src/conf/capabilities.c | 112 +++++++++++++++++++++--
src/conf/capabilities.h | 13 ++-
tests/vircaps2xmldata/vircaps-x86_64-caches.xml | 2 +
tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml | 2 +
tests/vircaps2xmltest.c | 11 +++
5 files changed, 132 insertions(+), 8 deletions(-)
diff --git a/src/conf/capabilities.c b/src/conf/capabilities.c
index 416dd1a..75c0bec 100644
--- a/src/conf/capabilities.c
+++ b/src/conf/capabilities.c
@@ -52,6 +52,7 @@
#define VIR_FROM_THIS VIR_FROM_CAPABILITIES
#define SYSFS_SYSTEM_PATH "/sys/devices/system/"
+#define SYSFS_RESCTRL_PATH "/sys/fs/resctrl/"
VIR_LOG_INIT("conf.capabilities")
@@ -873,6 +874,7 @@ virCapabilitiesFormatCaches(virBufferPtr buf,
virCapsHostCacheBankPtr *caches)
{
size_t i = 0;
+ size_t j = 0;
if (!ncaches)
return 0;
@@ -900,6 +902,18 @@ virCapabilitiesFormatCaches(virBufferPtr buf,
bank->size >> (kilos * 10),
kilos ? "KiB" : "B",
cpus_str);
+ virBufferAdjustIndent(buf, 2);
+ for (j = 0; j < bank->ncontrol; j++) {
+ bool min_kilos = !(bank->controls[j]->min % 1024);
+ virBufferAsprintf(buf,
+ "<control min='%llu' unit='%s' "
+ "type='%s' nclos='%u'/>\n",
+ bank->controls[j]->min >> (min_kilos * 10),
+ min_kilos ? "KiB" : "B",
+ virCacheTypeToString(bank->controls[j]->type),
+ bank->controls[j]->nclos);
+ }
+ virBufferAdjustIndent(buf, -2);
VIR_FREE(cpus_str);
}
@@ -1516,10 +1530,93 @@ virCapsHostCacheBankFree(virCapsHostCacheBankPtr ptr)
if (!ptr)
return;
+ size_t i;
Upstream frowns upon C99 initialization in the middle of the code.
virBitmapFree(ptr->cpus);
+ for (i = 0; i < ptr->ncontrol; i++)
+ VIR_FREE(ptr->controls[i]);
+ VIR_FREE(ptr->controls);
VIR_FREE(ptr);
}
+/* test which kinds of cache control supported
+ * -1: don't support
+ * 0: cat
+ * 1: cdp
+ */
+static int
+virCapabilitiesGetCacheControlType(virCapsHostCacheBankPtr bank)
+{
+ int ret = -1;
+ char *path = NULL;
+ if (virAsprintf(&path, SYSFS_RESCTRL_PATH "info/L%u", bank->level) < 0)
+ return -1;
+
+ if (virFileExists(path)) {
+ ret = 0;
+ } else {
+ VIR_FREE(path);
+ if (virAsprintf(&path, SYSFS_RESCTRL_PATH "info/L%uCODE", bank->level) < 0)
+ return -1;
+ if (virFileExists(path))
+ ret = 1;
+ }
+
+ VIR_FREE(path);
+ return ret;
+}
+
+static int
+virCapabilitiesGetCacheControl(virCapsHostCacheBankPtr bank, const char* type)
+{
+ int ret = -1;
+ char *path = NULL;
+ char *cbm_mask = NULL;
+ virCapsHostCacheControlPtr control;
+
+ if (VIR_ALLOC(control) < 0)
+ goto cleanup;
+
+ if (virFileReadValueUint(&control->nclos,
+ SYSFS_RESCTRL_PATH "info/L%u%s/num_closids",
+ bank->level,
+ type) < 0)
+ goto cleanup;
+
+ if (virFileReadValueString(&cbm_mask,
+ SYSFS_RESCTRL_PATH
+ "info/L%u%s/cbm_mask",
+ bank->level,
+ type) < 0)
+ goto cleanup;
+
+ virStringTrimOptionalNewline(cbm_mask);
+
+ control->min = bank->size / (strlen(cbm_mask) * 4);
+
+ if (STREQ("", type))
+ control->type = VIR_CACHE_TYPE_UNIFIED;
+ else if (STREQ("CODE", type))
+ control->type = VIR_CACHE_TYPE_INSTRUCTION;
+ else if (STREQ("DATA", type))
+ control->type = VIR_CACHE_TYPE_DATA;
+ else
+ goto cleanup;
+
+ if (VIR_APPEND_ELEMENT(bank->controls,
+ bank->ncontrol,
+ control) < 0)
+ goto error;
+
+ ret = 0;
+
+ cleanup:
+ VIR_FREE(path);
+ return ret;
+ error:
+ VIR_FREE(control);
+ return -1;
The return value is not used anywhere.
+}
+
int
virCapabilitiesInitCaches(virCapsPtr caps)
{
@@ -1533,11 +1630,6 @@ virCapabilitiesInitCaches(virCapsPtr caps)
struct dirent *ent = NULL;
virCapsHostCacheBankPtr bank = NULL;
- /* Minimum level to expose in capabilities. Can be lowered or removed (with
- * the appropriate code below), but should not be increased, because we'd
- * lose information. */
- const int cache_min_level = 3;
-
You are removing this and only reporting it for those we can control. But I believe the cache information can be valuable by itself, even for those who can't change it. If this was intentional, it should be mentioned in the commit message.
/* offline CPUs don't provide cache info */
if (virFileReadValueBitmap(&cpus, SYSFS_SYSTEM_PATH "cpu/online") < 0)
return -1;
@@ -1595,12 +1687,19 @@ virCapabilitiesInitCaches(virCapsPtr caps)
pos, ent->d_name) < 0)
goto cleanup;
- if (bank->level < cache_min_level) {
+ if ((ret = virCapabilitiesGetCacheControlType(bank)) < 0) {
virCapsHostCacheBankFree(bank);
bank = NULL;
continue;
}
+ if (ret == 0) {
+ virCapabilitiesGetCacheControl(bank, "");
+ } else if (ret == 1) {
+ virCapabilitiesGetCacheControl(bank, "CODE");
+ virCapabilitiesGetCacheControl(bank, "DATA");
+ }
+
for (tmp_c = type; *tmp_c != '\0'; tmp_c++)
*tmp_c = c_tolower(*tmp_c);
@@ -1617,6 +1716,7 @@ virCapabilitiesInitCaches(virCapsPtr caps)
if (virCapsHostCacheBankEquals(bank, caps->host.caches[i]))
break;
}
+
if (i == caps->host.ncaches) {
if (VIR_APPEND_ELEMENT(caps->host.caches,
caps->host.ncaches,
diff --git a/src/conf/capabilities.h b/src/conf/capabilities.h
index e099ccc..13effdd 100644
--- a/src/conf/capabilities.h
+++ b/src/conf/capabilities.h
@@ -139,15 +139,22 @@ struct _virCapsHostSecModel {
};
typedef enum {
- VIR_CACHE_TYPE_DATA,
- VIR_CACHE_TYPE_INSTRUCTION,
VIR_CACHE_TYPE_UNIFIED,
+ VIR_CACHE_TYPE_INSTRUCTION,
+ VIR_CACHE_TYPE_DATA,
VIR_CACHE_TYPE_LAST
} virCacheType;
VIR_ENUM_DECL(virCache);
+typedef struct _virCapsHostCacheControl virCapsHostCacheControl;
+typedef virCapsHostCacheControl *virCapsHostCacheControlPtr;
+struct _virCapsHostCacheControl {
+ unsigned long long min; /* B */
+ virCacheType type; /* Data, Instruction or Unified */
+ unsigned int nclos; /* number class of id */
+};
typedef struct _virCapsHostCacheBank virCapsHostCacheBank;
typedef virCapsHostCacheBank *virCapsHostCacheBankPtr;
struct _virCapsHostCacheBank {
@@ -156,6 +163,8 @@ struct _virCapsHostCacheBank {
unsigned long long size; /* B */
virCacheType type; /* Data, Instruction or Unified */
virBitmapPtr cpus; /* All CPUs that share this bank */
+ size_t ncontrol;
+ virCapsHostCacheControlPtr *controls;
};
typedef struct _virCapsHost virCapsHost;
diff --git a/tests/vircaps2xmldata/vircaps-x86_64-caches.xml b/tests/vircaps2xmldata/vircaps-x86_64-caches.xml
index f2da28e..61269ea 100644
--- a/tests/vircaps2xmldata/vircaps-x86_64-caches.xml
+++ b/tests/vircaps2xmldata/vircaps-x86_64-caches.xml
@@ -30,6 +30,8 @@
</topology>
<cache>
<bank id='0' level='3' type='unified' size='8192' unit='KiB' cpus='0-7'/>
+ <control min='419430' unit='B' type='instruction' nclos='8'/>
+ <control min='419430' unit='B' type='data' nclos='8'/>
This file should have no <control/> in it. There is no resctrl for these. I don't see the bug immeadiatelly, though.
</cache>
</host>
diff --git a/tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml b/tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml
index c30ea87..df27b94 100644
--- a/tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml
+++ b/tests/vircaps2xmldata/vircaps-x86_64-resctrl.xml
@@ -42,7 +42,9 @@
</topology>
<cache>
<bank id='0' level='3' type='unified' size='15360' unit='KiB' cpus='0-5'/>
+ <control min='768' unit='KiB' type='unified' nclos='4'/>
<bank id='1' level='3' type='unified' size='15360' unit='KiB' cpus='6-11'/>
+ <control min='768' unit='KiB' type='unified' nclos='4'/>
</cache>
</host>
diff --git a/tests/vircaps2xmltest.c b/tests/vircaps2xmltest.c
index f590249..93f776a 100644
--- a/tests/vircaps2xmltest.c
+++ b/tests/vircaps2xmltest.c
@@ -47,6 +47,7 @@ test_virCapabilities(const void *opaque)
char *capsXML = NULL;
char *path = NULL;
char *dir = NULL;
+ char *resctrl_dir = NULL;
int ret = -1;
/*
@@ -58,6 +59,15 @@ test_virCapabilities(const void *opaque)
data->resctrl ? "/system" : "") < 0)
goto cleanup;
+ if (data->resctrl) {
+ if (virAsprintf(&resctrl_dir, "%s/vircaps2xmldata/linux-%s%s",
just /resctrl instead of the last %s
+ abs_srcdir, data->filename,
+ "/resctrl") < 0)
+ goto cleanup;
+ virFileMockAddPrefix("/sys/fs/resctrl", resctrl_dir);
+ }
+
+
virFileMockAddPrefix("/sys/devices/system", dir);
caps = virCapabilitiesNew(data->arch, data->offlineMigrate, data->liveMigrate);
@@ -84,6 +94,7 @@ test_virCapabilities(const void *opaque)
cleanup:
VIR_FREE(dir);
+ VIR_FREE(resctrl_dir);
VIR_FREE(path);
VIR_FREE(capsXML);
virObjectUnref(caps);
--
1.9.1
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