6e217da60d
When computing the load_slice per irq we take the topology object load divided by the interrupt count for the object. Both of these values are integervalues which means if the interrupt count is larger than the load we get a load_slice of 0. It seems likely that on modern processors interrupt durations will be at least multiple nanoseconds long so if we compute load in nanoseconds it should be >= the interrupt count. The load is recomputed every SLEEP_INTERVAL which is currently 10s which makes the maximum possible load 10e9 which easily fits in a uint64_t. Note: corrected error checking on sysconf usage Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com> Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
148 lines
3.4 KiB
C
148 lines
3.4 KiB
C
#ifndef __INCLUDE_GUARD_IRQBALANCE_H_
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#define __INCLUDE_GUARD_IRQBALANCE_H_
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#include "constants.h"
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#include "cpumask.h"
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#include <stdint.h>
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#include <glib.h>
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#include <syslog.h>
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#include <limits.h>
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#include "types.h"
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#ifdef HAVE_NUMA_H
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#include <numa.h>
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#else
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#define numa_available() -1
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#endif
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extern int package_count;
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extern int cache_domain_count;
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extern int core_count;
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extern char *classes[];
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extern void parse_cpu_tree(void);
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extern void clear_work_stats(void);
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extern void parse_proc_interrupts(void);
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extern void parse_proc_stat(void);
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extern void set_interrupt_count(int number, uint64_t count);
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extern void set_msi_interrupt_numa(int number);
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extern GList *rebalance_irq_list;
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void update_migration_status(void);
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void reset_counts(void);
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void dump_workloads(void);
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void sort_irq_list(GList **list);
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void calculate_placement(void);
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void dump_tree(void);
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void activate_mappings(void);
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void clear_cpu_tree(void);
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/*===================NEW BALANCER FUNCTIONS============================*/
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/*
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* Master topo_obj type lists
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*/
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extern GList *numa_nodes;
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extern GList *packages;
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extern GList *cache_domains;
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extern GList *cpus;
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extern int numa_avail;
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enum hp_e {
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HINT_POLICY_IGNORE,
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HINT_POLICY_SUBSET,
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HINT_POLICY_EXACT
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};
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extern int debug_mode;
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extern int one_shot_mode;
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extern int power_mode;
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extern int need_rescan;
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extern enum hp_e hint_policy;
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extern unsigned long long cycle_count;
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extern unsigned long power_thresh;
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extern char *banscript;
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extern char *polscript;
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extern cpumask_t banned_cpus;
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extern cpumask_t unbanned_cpus;
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extern long HZ;
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/*
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* Numa node access routines
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*/
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extern void build_numa_node_list(void);
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extern void free_numa_node_list(void);
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extern void dump_numa_node_info(struct topo_obj *node, void *data);
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extern void add_package_to_node(struct topo_obj *p, int nodeid);
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extern struct topo_obj *get_numa_node(int nodeid);
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/*
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* Package functions
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*/
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#define package_numa_node(p) ((p)->parent)
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/*
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* cache_domain functions
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*/
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#define cache_domain_package(c) ((c)->parent)
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#define cache_domain_numa_node(c) (package_numa_node(cache_domain_package((c))))
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/*
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* cpu core functions
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*/
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#define cpu_cache_domain(cpu) ((cpu)->parent)
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#define cpu_package(cpu) (cache_domain_package(cpu_cache_domain((cpu))))
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#define cpu_numa_node(cpu) (package_numa_node(cache_domain_package(cpu_cache_domain((cpu)))))
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extern struct topo_obj *find_cpu_core(int cpunr);
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extern int get_cpu_count(void);
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/*
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* irq db functions
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*/
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extern void rebuild_irq_db(void);
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extern void free_irq_db(void);
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extern void add_banned_irq(int irq);
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extern void for_each_irq(GList *list, void (*cb)(struct irq_info *info, void *data), void *data);
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extern struct irq_info *get_irq_info(int irq);
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extern void migrate_irq(GList **from, GList **to, struct irq_info *info);
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extern struct irq_info *add_new_irq(int irq);
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#define irq_numa_node(irq) ((irq)->numa_node)
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/*
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* Generic object functions
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*/
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static inline void for_each_object(GList *list, void (*cb)(struct topo_obj *obj, void *data), void *data)
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{
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GList *entry, *next;
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entry = g_list_first(list);
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while (entry) {
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next = g_list_next(entry);
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cb(entry->data, data);
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entry = next;
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}
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}
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/*
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* Logging functions
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*/
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#define TO_SYSLOG (1 << 0)
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#define TO_CONSOLE (1 << 1)
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#define TO_ALL (TO_SYSLOG | TO_CONSOLE)
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extern unsigned int log_mask;
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#define log(mask, lvl, fmt, args...) do {\
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if (log_mask & mask & TO_SYSLOG)\
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syslog(lvl, fmt, ##args);\
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if (log_mask & mask & TO_CONSOLE)\
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printf(fmt, ##args);\
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}while(0)
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#endif
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