mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 10:30:52 +07:00
7702e8f45b
o cgroup changes for IOPS throttling rules. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
332 lines
10 KiB
C
332 lines
10 KiB
C
#ifndef _BLK_CGROUP_H
|
|
#define _BLK_CGROUP_H
|
|
/*
|
|
* Common Block IO controller cgroup interface
|
|
*
|
|
* Based on ideas and code from CFQ, CFS and BFQ:
|
|
* Copyright (C) 2003 Jens Axboe <axboe@kernel.dk>
|
|
*
|
|
* Copyright (C) 2008 Fabio Checconi <fabio@gandalf.sssup.it>
|
|
* Paolo Valente <paolo.valente@unimore.it>
|
|
*
|
|
* Copyright (C) 2009 Vivek Goyal <vgoyal@redhat.com>
|
|
* Nauman Rafique <nauman@google.com>
|
|
*/
|
|
|
|
#include <linux/cgroup.h>
|
|
|
|
enum blkio_policy_id {
|
|
BLKIO_POLICY_PROP = 0, /* Proportional Bandwidth division */
|
|
BLKIO_POLICY_THROTL, /* Throttling */
|
|
};
|
|
|
|
#if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE)
|
|
|
|
#ifndef CONFIG_BLK_CGROUP
|
|
/* When blk-cgroup is a module, its subsys_id isn't a compile-time constant */
|
|
extern struct cgroup_subsys blkio_subsys;
|
|
#define blkio_subsys_id blkio_subsys.subsys_id
|
|
#endif
|
|
|
|
enum stat_type {
|
|
/* Total time spent (in ns) between request dispatch to the driver and
|
|
* request completion for IOs doen by this cgroup. This may not be
|
|
* accurate when NCQ is turned on. */
|
|
BLKIO_STAT_SERVICE_TIME = 0,
|
|
/* Total bytes transferred */
|
|
BLKIO_STAT_SERVICE_BYTES,
|
|
/* Total IOs serviced, post merge */
|
|
BLKIO_STAT_SERVICED,
|
|
/* Total time spent waiting in scheduler queue in ns */
|
|
BLKIO_STAT_WAIT_TIME,
|
|
/* Number of IOs merged */
|
|
BLKIO_STAT_MERGED,
|
|
/* Number of IOs queued up */
|
|
BLKIO_STAT_QUEUED,
|
|
/* All the single valued stats go below this */
|
|
BLKIO_STAT_TIME,
|
|
BLKIO_STAT_SECTORS,
|
|
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
|
BLKIO_STAT_AVG_QUEUE_SIZE,
|
|
BLKIO_STAT_IDLE_TIME,
|
|
BLKIO_STAT_EMPTY_TIME,
|
|
BLKIO_STAT_GROUP_WAIT_TIME,
|
|
BLKIO_STAT_DEQUEUE
|
|
#endif
|
|
};
|
|
|
|
enum stat_sub_type {
|
|
BLKIO_STAT_READ = 0,
|
|
BLKIO_STAT_WRITE,
|
|
BLKIO_STAT_SYNC,
|
|
BLKIO_STAT_ASYNC,
|
|
BLKIO_STAT_TOTAL
|
|
};
|
|
|
|
/* blkg state flags */
|
|
enum blkg_state_flags {
|
|
BLKG_waiting = 0,
|
|
BLKG_idling,
|
|
BLKG_empty,
|
|
};
|
|
|
|
/* cgroup files owned by proportional weight policy */
|
|
enum blkcg_file_name_prop {
|
|
BLKIO_PROP_weight = 1,
|
|
BLKIO_PROP_weight_device,
|
|
BLKIO_PROP_io_service_bytes,
|
|
BLKIO_PROP_io_serviced,
|
|
BLKIO_PROP_time,
|
|
BLKIO_PROP_sectors,
|
|
BLKIO_PROP_io_service_time,
|
|
BLKIO_PROP_io_wait_time,
|
|
BLKIO_PROP_io_merged,
|
|
BLKIO_PROP_io_queued,
|
|
BLKIO_PROP_avg_queue_size,
|
|
BLKIO_PROP_group_wait_time,
|
|
BLKIO_PROP_idle_time,
|
|
BLKIO_PROP_empty_time,
|
|
BLKIO_PROP_dequeue,
|
|
};
|
|
|
|
/* cgroup files owned by throttle policy */
|
|
enum blkcg_file_name_throtl {
|
|
BLKIO_THROTL_read_bps_device,
|
|
BLKIO_THROTL_write_bps_device,
|
|
BLKIO_THROTL_read_iops_device,
|
|
BLKIO_THROTL_write_iops_device,
|
|
BLKIO_THROTL_io_service_bytes,
|
|
BLKIO_THROTL_io_serviced,
|
|
};
|
|
|
|
struct blkio_cgroup {
|
|
struct cgroup_subsys_state css;
|
|
unsigned int weight;
|
|
spinlock_t lock;
|
|
struct hlist_head blkg_list;
|
|
struct list_head policy_list; /* list of blkio_policy_node */
|
|
};
|
|
|
|
struct blkio_group_stats {
|
|
/* total disk time and nr sectors dispatched by this group */
|
|
uint64_t time;
|
|
uint64_t sectors;
|
|
uint64_t stat_arr[BLKIO_STAT_QUEUED + 1][BLKIO_STAT_TOTAL];
|
|
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
|
/* Sum of number of IOs queued across all samples */
|
|
uint64_t avg_queue_size_sum;
|
|
/* Count of samples taken for average */
|
|
uint64_t avg_queue_size_samples;
|
|
/* How many times this group has been removed from service tree */
|
|
unsigned long dequeue;
|
|
|
|
/* Total time spent waiting for it to be assigned a timeslice. */
|
|
uint64_t group_wait_time;
|
|
uint64_t start_group_wait_time;
|
|
|
|
/* Time spent idling for this blkio_group */
|
|
uint64_t idle_time;
|
|
uint64_t start_idle_time;
|
|
/*
|
|
* Total time when we have requests queued and do not contain the
|
|
* current active queue.
|
|
*/
|
|
uint64_t empty_time;
|
|
uint64_t start_empty_time;
|
|
uint16_t flags;
|
|
#endif
|
|
};
|
|
|
|
struct blkio_group {
|
|
/* An rcu protected unique identifier for the group */
|
|
void *key;
|
|
struct hlist_node blkcg_node;
|
|
unsigned short blkcg_id;
|
|
/* Store cgroup path */
|
|
char path[128];
|
|
/* The device MKDEV(major, minor), this group has been created for */
|
|
dev_t dev;
|
|
/* policy which owns this blk group */
|
|
enum blkio_policy_id plid;
|
|
|
|
/* Need to serialize the stats in the case of reset/update */
|
|
spinlock_t stats_lock;
|
|
struct blkio_group_stats stats;
|
|
};
|
|
|
|
struct blkio_policy_node {
|
|
struct list_head node;
|
|
dev_t dev;
|
|
/* This node belongs to max bw policy or porportional weight policy */
|
|
enum blkio_policy_id plid;
|
|
/* cgroup file to which this rule belongs to */
|
|
int fileid;
|
|
|
|
union {
|
|
unsigned int weight;
|
|
/*
|
|
* Rate read/write in terms of byptes per second
|
|
* Whether this rate represents read or write is determined
|
|
* by file type "fileid".
|
|
*/
|
|
u64 bps;
|
|
unsigned int iops;
|
|
} val;
|
|
};
|
|
|
|
extern unsigned int blkcg_get_weight(struct blkio_cgroup *blkcg,
|
|
dev_t dev);
|
|
extern uint64_t blkcg_get_read_bps(struct blkio_cgroup *blkcg,
|
|
dev_t dev);
|
|
extern uint64_t blkcg_get_write_bps(struct blkio_cgroup *blkcg,
|
|
dev_t dev);
|
|
extern unsigned int blkcg_get_read_iops(struct blkio_cgroup *blkcg,
|
|
dev_t dev);
|
|
extern unsigned int blkcg_get_write_iops(struct blkio_cgroup *blkcg,
|
|
dev_t dev);
|
|
|
|
typedef void (blkio_unlink_group_fn) (void *key, struct blkio_group *blkg);
|
|
typedef void (blkio_update_group_weight_fn) (struct blkio_group *blkg,
|
|
unsigned int weight);
|
|
typedef void (blkio_update_group_read_bps_fn) (struct blkio_group *blkg,
|
|
u64 read_bps);
|
|
typedef void (blkio_update_group_write_bps_fn) (struct blkio_group *blkg,
|
|
u64 write_bps);
|
|
typedef void (blkio_update_group_read_iops_fn) (struct blkio_group *blkg,
|
|
unsigned int read_iops);
|
|
typedef void (blkio_update_group_write_iops_fn) (struct blkio_group *blkg,
|
|
unsigned int write_iops);
|
|
|
|
struct blkio_policy_ops {
|
|
blkio_unlink_group_fn *blkio_unlink_group_fn;
|
|
blkio_update_group_weight_fn *blkio_update_group_weight_fn;
|
|
blkio_update_group_read_bps_fn *blkio_update_group_read_bps_fn;
|
|
blkio_update_group_write_bps_fn *blkio_update_group_write_bps_fn;
|
|
blkio_update_group_read_iops_fn *blkio_update_group_read_iops_fn;
|
|
blkio_update_group_write_iops_fn *blkio_update_group_write_iops_fn;
|
|
};
|
|
|
|
struct blkio_policy_type {
|
|
struct list_head list;
|
|
struct blkio_policy_ops ops;
|
|
enum blkio_policy_id plid;
|
|
};
|
|
|
|
/* Blkio controller policy registration */
|
|
extern void blkio_policy_register(struct blkio_policy_type *);
|
|
extern void blkio_policy_unregister(struct blkio_policy_type *);
|
|
|
|
static inline char *blkg_path(struct blkio_group *blkg)
|
|
{
|
|
return blkg->path;
|
|
}
|
|
|
|
#else
|
|
|
|
struct blkio_group {
|
|
};
|
|
|
|
struct blkio_policy_type {
|
|
};
|
|
|
|
static inline void blkio_policy_register(struct blkio_policy_type *blkiop) { }
|
|
static inline void blkio_policy_unregister(struct blkio_policy_type *blkiop) { }
|
|
|
|
static inline char *blkg_path(struct blkio_group *blkg) { return NULL; }
|
|
|
|
#endif
|
|
|
|
#define BLKIO_WEIGHT_MIN 100
|
|
#define BLKIO_WEIGHT_MAX 1000
|
|
#define BLKIO_WEIGHT_DEFAULT 500
|
|
|
|
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
|
void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg);
|
|
void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
|
|
unsigned long dequeue);
|
|
void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg);
|
|
void blkiocg_update_idle_time_stats(struct blkio_group *blkg);
|
|
void blkiocg_set_start_empty_time(struct blkio_group *blkg);
|
|
|
|
#define BLKG_FLAG_FNS(name) \
|
|
static inline void blkio_mark_blkg_##name( \
|
|
struct blkio_group_stats *stats) \
|
|
{ \
|
|
stats->flags |= (1 << BLKG_##name); \
|
|
} \
|
|
static inline void blkio_clear_blkg_##name( \
|
|
struct blkio_group_stats *stats) \
|
|
{ \
|
|
stats->flags &= ~(1 << BLKG_##name); \
|
|
} \
|
|
static inline int blkio_blkg_##name(struct blkio_group_stats *stats) \
|
|
{ \
|
|
return (stats->flags & (1 << BLKG_##name)) != 0; \
|
|
} \
|
|
|
|
BLKG_FLAG_FNS(waiting)
|
|
BLKG_FLAG_FNS(idling)
|
|
BLKG_FLAG_FNS(empty)
|
|
#undef BLKG_FLAG_FNS
|
|
#else
|
|
static inline void blkiocg_update_avg_queue_size_stats(
|
|
struct blkio_group *blkg) {}
|
|
static inline void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
|
|
unsigned long dequeue) {}
|
|
static inline void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg)
|
|
{}
|
|
static inline void blkiocg_update_idle_time_stats(struct blkio_group *blkg) {}
|
|
static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg) {}
|
|
#endif
|
|
|
|
#if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE)
|
|
extern struct blkio_cgroup blkio_root_cgroup;
|
|
extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup);
|
|
extern void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
|
|
struct blkio_group *blkg, void *key, dev_t dev,
|
|
enum blkio_policy_id plid);
|
|
extern int blkiocg_del_blkio_group(struct blkio_group *blkg);
|
|
extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg,
|
|
void *key);
|
|
void blkiocg_update_timeslice_used(struct blkio_group *blkg,
|
|
unsigned long time);
|
|
void blkiocg_update_dispatch_stats(struct blkio_group *blkg, uint64_t bytes,
|
|
bool direction, bool sync);
|
|
void blkiocg_update_completion_stats(struct blkio_group *blkg,
|
|
uint64_t start_time, uint64_t io_start_time, bool direction, bool sync);
|
|
void blkiocg_update_io_merged_stats(struct blkio_group *blkg, bool direction,
|
|
bool sync);
|
|
void blkiocg_update_io_add_stats(struct blkio_group *blkg,
|
|
struct blkio_group *curr_blkg, bool direction, bool sync);
|
|
void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
|
|
bool direction, bool sync);
|
|
#else
|
|
struct cgroup;
|
|
static inline struct blkio_cgroup *
|
|
cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; }
|
|
|
|
static inline void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
|
|
struct blkio_group *blkg, void *key, dev_t dev,
|
|
enum blkio_policy_id plid) {}
|
|
|
|
static inline int
|
|
blkiocg_del_blkio_group(struct blkio_group *blkg) { return 0; }
|
|
|
|
static inline struct blkio_group *
|
|
blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key) { return NULL; }
|
|
static inline void blkiocg_update_timeslice_used(struct blkio_group *blkg,
|
|
unsigned long time) {}
|
|
static inline void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
|
|
uint64_t bytes, bool direction, bool sync) {}
|
|
static inline void blkiocg_update_completion_stats(struct blkio_group *blkg,
|
|
uint64_t start_time, uint64_t io_start_time, bool direction,
|
|
bool sync) {}
|
|
static inline void blkiocg_update_io_merged_stats(struct blkio_group *blkg,
|
|
bool direction, bool sync) {}
|
|
static inline void blkiocg_update_io_add_stats(struct blkio_group *blkg,
|
|
struct blkio_group *curr_blkg, bool direction, bool sync) {}
|
|
static inline void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
|
|
bool direction, bool sync) {}
|
|
#endif
|
|
#endif /* _BLK_CGROUP_H */
|