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cpu_ppc64: Avoid repeated loading of CPU map

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The ppc64 CPU code still has to load and parse the CPU map everytime it
needs to look at it, which can make some operations pretty slow. Other
archs already switched to loading the CPU map once and keeping the
parsed structure in memory. Let's switch ppc64 as well.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Jiri Denemark 2022-09-30 11:03:15 +02:00
parent f0554d88fb
commit 0cc8e87520
1 changed files with 37 additions and 10 deletions
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47
src/cpu/cpu_ppc64.c
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@ -53,6 +53,12 @@ struct _ppc64_map {
struct _ppc64_model **models;
};
static virCPUppc64Map *cpuMap;
int virCPUppc64DriverOnceInit(void);
VIR_ONCE_GLOBAL_INIT(virCPUppc64Driver);
/* Convert a legacy CPU definition by transforming
* model names to generation names:
* POWER7_v2.1 => POWER7
@ -365,8 +371,8 @@ ppc64ModelParse(xmlXPathContextPtr ctxt,
}
static struct _ppc64_map *
ppc64LoadMap(void)
static virCPUppc64Map *
virCPUppc64LoadMap(void)
{
g_autoptr(virCPUppc64Map) map = NULL;
@ -378,12 +384,33 @@ ppc64LoadMap(void)
return g_steal_pointer(&map);
}
int
virCPUppc64DriverOnceInit(void)
{
if (!(cpuMap = virCPUppc64LoadMap()))
return -1;
return 0;
}
static virCPUppc64Map *
virCPUppc64GetMap(void)
{
if (virCPUppc64DriverInitialize() < 0)
return NULL;
return cpuMap;
}
static virCPUCompareResult
ppc64Compute(virCPUDef *host,
const virCPUDef *other,
char **message)
{
g_autoptr(virCPUppc64Map) map = NULL;
virCPUppc64Map *map = NULL;
g_autoptr(virCPUppc64Model) host_model = NULL;
g_autoptr(virCPUppc64Model) guest_model = NULL;
g_autoptr(virCPUDef) cpu = NULL;
@ -428,7 +455,7 @@ ppc64Compute(virCPUDef *host,
return VIR_CPU_COMPARE_INCOMPATIBLE;
}
if (!(map = ppc64LoadMap()))
if (!(map = virCPUppc64GetMap()))
return VIR_CPU_COMPARE_ERROR;
/* Host CPU information */
@ -526,10 +553,10 @@ ppc64DriverDecode(virCPUDef *cpu,
const virCPUData *data,
virDomainCapsCPUModels *models)
{
g_autoptr(virCPUppc64Map) map = NULL;
virCPUppc64Map *map = NULL;
const virCPUppc64Model *model;
if (!data || !(map = ppc64LoadMap()))
if (!data || !(map = virCPUppc64GetMap()))
return -1;
if (!(model = ppc64ModelFindPVR(map, data->data.ppc64.pvr[0].value))) {
@ -656,13 +683,13 @@ virCPUppc64Baseline(virCPUDef **cpus,
const char **features G_GNUC_UNUSED,
bool migratable G_GNUC_UNUSED)
{
g_autoptr(virCPUppc64Map) map = NULL;
virCPUppc64Map *map = NULL;
const virCPUppc64Model *model;
const virCPUppc64Vendor *vendor = NULL;
g_autoptr(virCPUDef) cpu = NULL;
size_t i;
if (!(map = ppc64LoadMap()))
if (!(map = virCPUppc64GetMap()))
return NULL;
if (!(model = ppc64ModelFind(map, cpus[0]->model))) {
@ -737,10 +764,10 @@ virCPUppc64Baseline(virCPUDef **cpus,
static int
virCPUppc64DriverGetModels(char ***models)
{
g_autoptr(virCPUppc64Map) map = NULL;
virCPUppc64Map *map = NULL;
size_t i;
if (!(map = ppc64LoadMap()))
if (!(map = virCPUppc64GetMap()))
return -1;
if (models) {