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Linux scheduler allows architectures to assign capacity values to individual CPUs. This hints scheduler the performance difference between CPUs and allows more efficient task distribution them. Implement helper methods to set and get CPU capacities for s390. This is particularly helpful in vertical polarization configurations of LPARs. On vertical polarization an LPARs CPUs can get different polarization values depending on the CEC configuration. CPUs with different polarization values can perform different from each other, using CPU capacities this can be reflected to linux scheduler. Acked-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Mete Durlu <meted@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_S390_TOPOLOGY_H
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#define _ASM_S390_TOPOLOGY_H
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#include <linux/cpumask.h>
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#include <asm/numa.h>
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struct sysinfo_15_1_x;
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struct cpu;
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#ifdef CONFIG_SCHED_TOPOLOGY
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struct cpu_topology_s390 {
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unsigned short thread_id;
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unsigned short core_id;
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unsigned short socket_id;
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unsigned short book_id;
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unsigned short drawer_id;
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unsigned short dedicated : 1;
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int booted_cores;
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cpumask_t thread_mask;
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cpumask_t core_mask;
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cpumask_t book_mask;
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cpumask_t drawer_mask;
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};
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extern struct cpu_topology_s390 cpu_topology[NR_CPUS];
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#define topology_physical_package_id(cpu) (cpu_topology[cpu].socket_id)
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#define topology_thread_id(cpu) (cpu_topology[cpu].thread_id)
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#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_mask)
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#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
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#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_mask)
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#define topology_book_id(cpu) (cpu_topology[cpu].book_id)
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#define topology_book_cpumask(cpu) (&cpu_topology[cpu].book_mask)
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#define topology_drawer_id(cpu) (cpu_topology[cpu].drawer_id)
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#define topology_drawer_cpumask(cpu) (&cpu_topology[cpu].drawer_mask)
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#define topology_cpu_dedicated(cpu) (cpu_topology[cpu].dedicated)
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#define topology_booted_cores(cpu) (cpu_topology[cpu].booted_cores)
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#define mc_capable() 1
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void topology_init_early(void);
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int topology_cpu_init(struct cpu *);
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int topology_set_cpu_management(int fc);
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void topology_schedule_update(void);
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void store_topology(struct sysinfo_15_1_x *info);
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void update_cpu_masks(void);
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void topology_expect_change(void);
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const struct cpumask *cpu_coregroup_mask(int cpu);
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#else /* CONFIG_SCHED_TOPOLOGY */
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static inline void topology_init_early(void) { }
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static inline void topology_schedule_update(void) { }
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static inline int topology_cpu_init(struct cpu *cpu) { return 0; }
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static inline int topology_cpu_dedicated(int cpu_nr) { return 0; }
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static inline int topology_booted_cores(int cpu_nr) { return 1; }
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static inline void update_cpu_masks(void) { }
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static inline void topology_expect_change(void) { }
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#endif /* CONFIG_SCHED_TOPOLOGY */
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#define POLARIZATION_UNKNOWN (-1)
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#define POLARIZATION_HRZ (0)
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#define POLARIZATION_VL (1)
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#define POLARIZATION_VM (2)
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#define POLARIZATION_VH (3)
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#define CPU_CAPACITY_HIGH SCHED_CAPACITY_SCALE
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#define CPU_CAPACITY_LOW (SCHED_CAPACITY_SCALE >> 3)
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#define SD_BOOK_INIT SD_CPU_INIT
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#ifdef CONFIG_NUMA
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#define cpu_to_node cpu_to_node
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static inline int cpu_to_node(int cpu)
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{
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return 0;
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}
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/* Returns a pointer to the cpumask of CPUs on node 'node'. */
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#define cpumask_of_node cpumask_of_node
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static inline const struct cpumask *cpumask_of_node(int node)
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{
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return cpu_possible_mask;
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}
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#define pcibus_to_node(bus) __pcibus_to_node(bus)
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#else /* !CONFIG_NUMA */
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#define numa_node_id numa_node_id
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static inline int numa_node_id(void)
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{
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return 0;
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}
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#endif /* CONFIG_NUMA */
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#include <asm-generic/topology.h>
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#endif /* _ASM_S390_TOPOLOGY_H */
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