32a7757a03
irqbalance has been broken for a long time. Its ability to properly detect msi irqs and to correctly identify interrupt types (net vs. storage vs. other, etc), has been based on some tenuous string comparison logic that was easily broken by administrative name changes for interfaces. I've recently submitted this patch: https://lkml.org/lkml/2011/9/19/176 Which lets us use sysfs exclusively for finding device interrupts, which in turns lets us definitavely identify irq types (legacy pci vs. msi), as well as properly classifying them using the pci device class value. Additionally, this patch rips out the code that attemtps to bias interrupt count volumes using network statistics, since theres no sane way to be certain a single network interrupt is responsible for the number of packets received on a given interface. Workload computation is now done on soley on irq count. This may change in the future, adding /proc/stat irq and softirq time to the biasing mechanism. Note that without the above kernel change, this doesn't work right. Irqbalance contains a self check in which it identifies MSI interrupts in /proc/interrupts still. If it sees MSI irqs in /proc/interrupts, but none in sysfs, then it will issue a loud warning about irqs being missclassified until the kernel is updated. Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
55 lines
1.3 KiB
C
55 lines
1.3 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 "types.h"
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#include <numa.h>
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struct interrupt;
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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 int map_class_to_level[7];
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extern int class_counts[7];
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extern int debug_mode;
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extern int power_mode;
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extern int need_cpu_rescan;
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extern int one_shot_mode;
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extern GList *interrupts;
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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 rebuild_irq_db(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, char *devname);
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extern int get_next_irq(int irq);
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extern int find_irq_integer_prop(int irq, enum irq_prop prop);
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extern cpumask_t find_irq_cpumask_prop(int irq, enum irq_prop prop);
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extern void add_interrupt_numa(int number, cpumask_t mask, int node_num, int type);
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void calculate_workload(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(void);
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void calculate_placement(void);
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void dump_tree(void);
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void activate_mapping(void);
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void account_for_nic_stats(void);
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void check_power_mode(void);
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void clear_cpu_tree(void);
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void pci_numa_scan(void);
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#endif
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