redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

s390/topology: reduce per_cpu() invocations 

Each per_cpu() invocation generates extra code. Since there are a lot
of similiar calls in the topology code we can avoid a lot of them.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
hifive-unleashed-5.1
Heiko Carstens 2015-10-15 13:40:55 +02:00 committed by Martin Schwidefsky
parent 36324963a3
commit 439eb131f7
1 changed files with 16 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
arch/s390/kernel/topology.c
View File

@ -84,6 +84,7 @@ static struct mask_info *add_cpus_to_mask(struct topology_core *tl_core,
struct mask_info *socket,
int one_socket_per_cpu)
{
struct cpu_topology_s390 *topo;
unsigned int core;
for_each_set_bit(core, &tl_core->mask[0], TOPOLOGY_CORE_BITS) {
@ -95,15 +96,16 @@ static struct mask_info *add_cpus_to_mask(struct topology_core *tl_core,
if (lcpu < 0)
continue;
for (i = 0; i <= smp_cpu_mtid; i++) {
per_cpu(cpu_topology, lcpu + i).book_id = book->id;
per_cpu(cpu_topology, lcpu + i).core_id = rcore;
per_cpu(cpu_topology, lcpu + i).thread_id = lcpu + i;
topo = &per_cpu(cpu_topology, lcpu + i);
topo->book_id = book->id;
topo->core_id = rcore;
topo->thread_id = lcpu + i;
cpumask_set_cpu(lcpu + i, &book->mask);
cpumask_set_cpu(lcpu + i, &socket->mask);
if (one_socket_per_cpu)
per_cpu(cpu_topology, lcpu + i).socket_id = rcore;
topo->socket_id = rcore;
else
per_cpu(cpu_topology, lcpu + i).socket_id = socket->id;
topo->socket_id = socket->id;
smp_cpu_set_polarization(lcpu + i, tl_core->pp);
}
if (one_socket_per_cpu)
@ -247,17 +249,19 @@ int topology_set_cpu_management(int fc)
static void update_cpu_masks(void)
{
struct cpu_topology_s390 *topo;
int cpu;
for_each_possible_cpu(cpu) {
per_cpu(cpu_topology, cpu).thread_mask = cpu_thread_map(cpu);
per_cpu(cpu_topology, cpu).core_mask = cpu_group_map(&socket_info, cpu);
per_cpu(cpu_topology, cpu).book_mask = cpu_group_map(&book_info, cpu);
topo = &per_cpu(cpu_topology, cpu);
topo->thread_mask = cpu_thread_map(cpu);
topo->core_mask = cpu_group_map(&socket_info, cpu);
topo->book_mask = cpu_group_map(&book_info, cpu);
if (!MACHINE_HAS_TOPOLOGY) {
per_cpu(cpu_topology, cpu).thread_id = cpu;
per_cpu(cpu_topology, cpu).core_id = cpu;
per_cpu(cpu_topology, cpu).socket_id = cpu;
per_cpu(cpu_topology, cpu).book_id = cpu;
topo->thread_id = cpu;
topo->core_id = cpu;
topo->socket_id = cpu;
topo->book_id = cpu;
}
}
numa_update_cpu_topology();