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Allocate only the required CPUs

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This commit is contained in:
Rodrigo Arias 2021-11-18 18:27:28 +01:00
parent 8153742c1f
commit a663f2c11b
4 changed files with 37 additions and 9 deletions
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41
emu.c
View File

@ -540,11 +540,15 @@ add_new_cpu(struct ovni_emu *emu, struct ovni_loom *loom, int i, int phyid)
{
struct ovni_cpu *cpu;
/* The logical id must match our index */
assert((size_t) i == loom->ncpus);
cpu = &loom->cpu[i];
if(i < 0 || i >= (int) loom->ncpus)
{
err("CPU with index %d in loom %s is out of bounds\n", i,
loom->hostname);
abort();
}
assert(cpu->state == CPU_ST_UNKNOWN);
cpu->state = CPU_ST_READY;
@ -554,8 +558,6 @@ add_new_cpu(struct ovni_emu *emu, struct ovni_loom *loom, int i, int phyid)
cpu->loom = loom;
dbg("new cpu %d at phyid=%d\n", cpu->gindex, phyid);
loom->ncpus++;
}
static void
@ -579,16 +581,41 @@ proc_load_cpus(struct ovni_emu *emu, struct ovni_loom *loom, struct ovni_eproc *
assert(loom->ncpus == 0);
for(i = 0; i < json_array_get_count(cpuarray); i++)
loom->ncpus = json_array_get_count(cpuarray);
if(loom->ncpus <= 0)
{
err("loom %s proc %d has read %ld cpus, but required > 0\n",
loom->hostname, proc->pid, loom->ncpus);
abort();
}
loom->cpu = calloc(loom->ncpus, sizeof(struct ovni_cpu));
if(loom->cpu == NULL)
{
perror("calloc failed");
abort();
}
for(i = 0; i < loom->ncpus; i++)
{
cpu = json_array_get_object(cpuarray, i);
if(cpu == NULL)
{
err("json_array_get_object returned NULL\n");
abort();
}
index = (int) json_object_get_number(cpu, "index");
phyid = (int) json_object_get_number(cpu, "phyid");
add_new_cpu(emu, loom, index, phyid);
}
/* If we reach this point, all CPUs are in the ready state */
/* Init the vcpu as well */
vcpu = &loom->vcpu;
assert(vcpu->state == CPU_ST_UNKNOWN);
@ -651,6 +678,8 @@ destroy_metadata(struct ovni_emu *emu)
assert(proc->meta);
json_value_free(proc->meta);
}
free(loom->cpu);
}
return 0;

2
emu.h
View File

@ -381,7 +381,7 @@ struct ovni_loom {
size_t max_phyid;
size_t ncpus;
size_t offset_ncpus;
struct ovni_cpu cpu[OVNI_MAX_CPU];
struct ovni_cpu *cpu;
int64_t clock_offset;

2
emu_ovni.c
View File

@ -187,7 +187,7 @@ update_cpu(struct ovni_cpu *cpu)
struct ovni_cpu *
emu_get_cpu(struct ovni_loom *loom, int cpuid)
{
assert(cpuid < OVNI_MAX_CPU);
assert(cpuid < (int) loom->ncpus);
if(cpuid < 0)
{

1
ovni.h
View File

@ -40,7 +40,6 @@ extern "C" {
/* Hardcode the JSON_Value to avoid a dependency with janson */
typedef struct json_value_t JSON_Value;
#define OVNI_MAX_CPU 256
#define OVNI_TRACEDIR "ovni"
#define OVNI_MAX_HOSTNAME 512