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s390/cpuinfo: show number of online cores

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Show number of cores that run at least one SMT thread

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2020-03-13 16:52:44 +01:00 committed by Vasily Gorbik
parent 1a2ae03b19
commit 959684978d
3 changed files with 22 additions and 2 deletions
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3
arch/s390/include/asm/topology.h
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@ -17,6 +17,7 @@ struct cpu_topology_s390 {
unsigned short book_id;
unsigned short drawer_id;
unsigned short dedicated : 1;
int booted_cores;
cpumask_t thread_mask;
cpumask_t core_mask;
cpumask_t book_mask;
@ -35,6 +36,7 @@ extern struct cpu_topology_s390 cpu_topology[NR_CPUS];
#define topology_drawer_id(cpu) (cpu_topology[cpu].drawer_id)
#define topology_drawer_cpumask(cpu) (&cpu_topology[cpu].drawer_mask)
#define topology_cpu_dedicated(cpu) (cpu_topology[cpu].dedicated)
#define topology_booted_cores(cpu) (cpu_topology[cpu].booted_cores)
#define mc_capable() 1
@ -53,6 +55,7 @@ static inline void topology_init_early(void) { }
static inline void topology_schedule_update(void) { }
static inline int topology_cpu_init(struct cpu *cpu) { return 0; }
static inline int topology_cpu_dedicated(int cpu_nr) { return 0; }
static inline int topology_booted_cores(int cpu_nr) { return 1; }
static inline void update_cpu_masks(void) { }
static inline void topology_expect_change(void) { }

1
arch/s390/kernel/processor.c
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@ -160,6 +160,7 @@ static void show_cpu_topology(struct seq_file *m, unsigned long n)
seq_printf(m, "drawer id : %d\n", topology_drawer_id(n));
seq_printf(m, "dedicated : %d\n", topology_cpu_dedicated(n));
seq_printf(m, "address : %d\n", smp_cpu_get_cpu_address(n));
seq_printf(m, "cpu cores : %d\n", topology_booted_cores(n));
#endif /* CONFIG_SCHED_TOPOLOGY */
}

20
arch/s390/kernel/topology.c
View File

@ -245,8 +245,8 @@ int topology_set_cpu_management(int fc)
void update_cpu_masks(void)
{
struct cpu_topology_s390 *topo;
int cpu, id;
struct cpu_topology_s390 *topo, *topo_package, *topo_sibling;
int cpu, sibling, pkg_first, smt_first, id;
for_each_possible_cpu(cpu) {
topo = &cpu_topology[cpu];
@ -254,6 +254,7 @@ void update_cpu_masks(void)
topo->core_mask = cpu_group_map(&socket_info, cpu);
topo->book_mask = cpu_group_map(&book_info, cpu);
topo->drawer_mask = cpu_group_map(&drawer_info, cpu);
topo->booted_cores = 0;
if (topology_mode != TOPOLOGY_MODE_HW) {
id = topology_mode == TOPOLOGY_MODE_PACKAGE ? 0 : cpu;
topo->thread_id = cpu;
@ -263,6 +264,21 @@ void update_cpu_masks(void)
topo->drawer_id = id;
}
}
for_each_online_cpu(cpu) {
topo = &cpu_topology[cpu];
pkg_first = cpumask_first(&topo->core_mask);
topo_package = &cpu_topology[pkg_first];
if (cpu == pkg_first) {
for_each_cpu(sibling, &topo->core_mask) {
topo_sibling = &cpu_topology[sibling];
smt_first = cpumask_first(&topo_sibling->thread_mask);
if (sibling == smt_first)
topo_package->booted_cores++;
}
} else {
topo->booted_cores = topo_package->booted_cores;
}
}
}
void store_topology(struct sysinfo_15_1_x *info)