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blkcg: restructure statistics printing
blkcg stats handling is a mess. None of the stats has much to do with blkcg core but they are all implemented in blkcg core. Code sharing is achieved by mixing common code with hard-coded cases for each stat counter. This patch restructures statistics printing such that * Common logic exists as helper functions and specific print functions use the helpers to implement specific cases. * Printing functions serving multiple counters don't require hardcoded switching on specific counters. * Printing uses read_seq_string callback (other methods will be phased out). This change enables further cleanups and relocating stats code to the policy implementation it belongs to. Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo
parent
edcb0722c6
commit
d3d32e69fa
@ -753,187 +753,228 @@ blkiocg_reset_stats(struct cgroup *cgroup, struct cftype *cftype, u64 val)
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return 0;
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}
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static void blkio_get_key_name(enum blkg_rwstat_type type, const char *dname,
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char *str, int chars_left, bool diskname_only)
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static const char *blkg_dev_name(struct blkio_group *blkg)
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{
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snprintf(str, chars_left, "%s", dname);
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chars_left -= strlen(str);
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if (chars_left <= 0) {
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printk(KERN_WARNING
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"Possibly incorrect cgroup stat display format");
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return;
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}
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if (diskname_only)
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return;
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switch (type) {
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case BLKG_RWSTAT_READ:
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strlcat(str, " Read", chars_left);
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break;
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case BLKG_RWSTAT_WRITE:
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strlcat(str, " Write", chars_left);
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break;
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case BLKG_RWSTAT_SYNC:
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strlcat(str, " Sync", chars_left);
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break;
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case BLKG_RWSTAT_ASYNC:
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strlcat(str, " Async", chars_left);
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break;
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case BLKG_RWSTAT_TOTAL:
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strlcat(str, " Total", chars_left);
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break;
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default:
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strlcat(str, " Invalid", chars_left);
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}
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/* some drivers (floppy) instantiate a queue w/o disk registered */
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if (blkg->q->backing_dev_info.dev)
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return dev_name(blkg->q->backing_dev_info.dev);
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return NULL;
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}
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static uint64_t blkio_read_stat_cpu(struct blkio_group *blkg, int plid,
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enum stat_type_cpu type,
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enum blkg_rwstat_type sub_type)
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/**
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* blkcg_print_blkgs - helper for printing per-blkg data
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* @sf: seq_file to print to
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* @blkcg: blkcg of interest
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* @prfill: fill function to print out a blkg
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* @pol: policy in question
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* @data: data to be passed to @prfill
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* @show_total: to print out sum of prfill return values or not
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*
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* This function invokes @prfill on each blkg of @blkcg if pd for the
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* policy specified by @pol exists. @prfill is invoked with @sf, the
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* policy data and @data. If @show_total is %true, the sum of the return
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* values from @prfill is printed with "Total" label at the end.
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*
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* This is to be used to construct print functions for
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* cftype->read_seq_string method.
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*/
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static void blkcg_print_blkgs(struct seq_file *sf, struct blkio_cgroup *blkcg,
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u64 (*prfill)(struct seq_file *,
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struct blkg_policy_data *, int),
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int pol, int data, bool show_total)
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{
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struct blkg_policy_data *pd = blkg->pd[plid];
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u64 val = 0;
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struct blkio_group *blkg;
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struct hlist_node *n;
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u64 total = 0;
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spin_lock_irq(&blkcg->lock);
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hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node)
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if (blkg->pd[pol])
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total += prfill(sf, blkg->pd[pol], data);
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spin_unlock_irq(&blkcg->lock);
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if (show_total)
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seq_printf(sf, "Total %llu\n", (unsigned long long)total);
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}
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/**
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* __blkg_prfill_u64 - prfill helper for a single u64 value
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* @sf: seq_file to print to
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* @pd: policy data of interest
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* @v: value to print
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*
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* Print @v to @sf for the device assocaited with @pd.
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*/
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static u64 __blkg_prfill_u64(struct seq_file *sf, struct blkg_policy_data *pd,
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u64 v)
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{
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const char *dname = blkg_dev_name(pd->blkg);
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if (!dname)
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return 0;
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seq_printf(sf, "%s %llu\n", dname, (unsigned long long)v);
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return v;
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}
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/**
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* __blkg_prfill_rwstat - prfill helper for a blkg_rwstat
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* @sf: seq_file to print to
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* @pd: policy data of interest
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* @rwstat: rwstat to print
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*
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* Print @rwstat to @sf for the device assocaited with @pd.
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*/
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static u64 __blkg_prfill_rwstat(struct seq_file *sf,
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struct blkg_policy_data *pd,
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const struct blkg_rwstat *rwstat)
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{
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static const char *rwstr[] = {
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[BLKG_RWSTAT_READ] = "Read",
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[BLKG_RWSTAT_WRITE] = "Write",
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[BLKG_RWSTAT_SYNC] = "Sync",
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[BLKG_RWSTAT_ASYNC] = "Async",
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};
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const char *dname = blkg_dev_name(pd->blkg);
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u64 v;
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int i;
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if (!dname)
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return 0;
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for (i = 0; i < BLKG_RWSTAT_NR; i++)
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seq_printf(sf, "%s %s %llu\n", dname, rwstr[i],
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(unsigned long long)rwstat->cnt[i]);
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v = rwstat->cnt[BLKG_RWSTAT_READ] + rwstat->cnt[BLKG_RWSTAT_WRITE];
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seq_printf(sf, "%s Total %llu\n", dname, (unsigned long long)v);
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return v;
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}
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static u64 blkg_prfill_stat(struct seq_file *sf, struct blkg_policy_data *pd,
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int off)
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{
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return __blkg_prfill_u64(sf, pd,
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blkg_stat_read((void *)&pd->stats + off));
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}
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static u64 blkg_prfill_rwstat(struct seq_file *sf, struct blkg_policy_data *pd,
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int off)
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{
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struct blkg_rwstat rwstat = blkg_rwstat_read((void *)&pd->stats + off);
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return __blkg_prfill_rwstat(sf, pd, &rwstat);
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}
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/* print blkg_stat specified by BLKCG_STAT_PRIV() */
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static int blkcg_print_stat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_stat,
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BLKCG_STAT_POL(cft->private),
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BLKCG_STAT_OFF(cft->private), false);
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return 0;
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}
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/* print blkg_rwstat specified by BLKCG_STAT_PRIV() */
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static int blkcg_print_rwstat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_rwstat,
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BLKCG_STAT_POL(cft->private),
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BLKCG_STAT_OFF(cft->private), true);
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return 0;
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}
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static u64 blkg_prfill_cpu_stat(struct seq_file *sf,
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struct blkg_policy_data *pd, int off)
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{
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u64 v = 0;
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int cpu;
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if (pd->stats_cpu == NULL)
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return val;
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for_each_possible_cpu(cpu) {
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struct blkio_group_stats_cpu *sc =
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per_cpu_ptr(pd->stats_cpu, cpu);
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v += blkg_stat_read((void *)sc + off);
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}
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return __blkg_prfill_u64(sf, pd, v);
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}
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static u64 blkg_prfill_cpu_rwstat(struct seq_file *sf,
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struct blkg_policy_data *pd, int off)
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{
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struct blkg_rwstat rwstat = { }, tmp;
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int i, cpu;
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for_each_possible_cpu(cpu) {
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struct blkio_group_stats_cpu *stats_cpu =
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struct blkio_group_stats_cpu *sc =
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per_cpu_ptr(pd->stats_cpu, cpu);
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struct blkg_rwstat rws;
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switch (type) {
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case BLKIO_STAT_CPU_SECTORS:
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val += blkg_stat_read(&stats_cpu->sectors);
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break;
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case BLKIO_STAT_CPU_SERVICE_BYTES:
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rws = blkg_rwstat_read(&stats_cpu->service_bytes);
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val += rws.cnt[sub_type];
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break;
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case BLKIO_STAT_CPU_SERVICED:
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rws = blkg_rwstat_read(&stats_cpu->serviced);
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val += rws.cnt[sub_type];
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break;
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}
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tmp = blkg_rwstat_read((void *)sc + off);
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for (i = 0; i < BLKG_RWSTAT_NR; i++)
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rwstat.cnt[i] += tmp.cnt[i];
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}
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return val;
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return __blkg_prfill_rwstat(sf, pd, &rwstat);
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}
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static uint64_t blkio_get_stat_cpu(struct blkio_group *blkg, int plid,
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struct cgroup_map_cb *cb, const char *dname,
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enum stat_type_cpu type)
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/* print per-cpu blkg_stat specified by BLKCG_STAT_PRIV() */
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static int blkcg_print_cpu_stat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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uint64_t disk_total, val;
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char key_str[MAX_KEY_LEN];
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enum blkg_rwstat_type sub_type;
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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if (type == BLKIO_STAT_CPU_SECTORS) {
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val = blkio_read_stat_cpu(blkg, plid, type, 0);
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blkio_get_key_name(0, dname, key_str, MAX_KEY_LEN, true);
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cb->fill(cb, key_str, val);
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return val;
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}
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for (sub_type = BLKG_RWSTAT_READ; sub_type < BLKG_RWSTAT_NR;
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sub_type++) {
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blkio_get_key_name(sub_type, dname, key_str, MAX_KEY_LEN,
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false);
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val = blkio_read_stat_cpu(blkg, plid, type, sub_type);
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cb->fill(cb, key_str, val);
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}
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disk_total = blkio_read_stat_cpu(blkg, plid, type, BLKG_RWSTAT_READ) +
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blkio_read_stat_cpu(blkg, plid, type, BLKG_RWSTAT_WRITE);
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blkio_get_key_name(BLKG_RWSTAT_TOTAL, dname, key_str, MAX_KEY_LEN,
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false);
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cb->fill(cb, key_str, disk_total);
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return disk_total;
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_cpu_stat,
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BLKCG_STAT_POL(cft->private),
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BLKCG_STAT_OFF(cft->private), false);
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return 0;
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}
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static uint64_t blkio_get_stat(struct blkio_group *blkg, int plid,
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struct cgroup_map_cb *cb, const char *dname,
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enum stat_type type)
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/* print per-cpu blkg_rwstat specified by BLKCG_STAT_PRIV() */
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static int blkcg_print_cpu_rwstat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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struct blkio_group_stats *stats = &blkg->pd[plid]->stats;
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uint64_t v = 0, disk_total = 0;
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char key_str[MAX_KEY_LEN];
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struct blkg_rwstat rws = { };
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int st;
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_cpu_rwstat,
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BLKCG_STAT_POL(cft->private),
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BLKCG_STAT_OFF(cft->private), true);
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return 0;
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}
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if (type >= BLKIO_STAT_ARR_NR) {
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switch (type) {
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case BLKIO_STAT_TIME:
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v = blkg_stat_read(&stats->time);
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break;
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#ifdef CONFIG_DEBUG_BLK_CGROUP
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case BLKIO_STAT_UNACCOUNTED_TIME:
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v = blkg_stat_read(&stats->unaccounted_time);
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break;
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case BLKIO_STAT_AVG_QUEUE_SIZE: {
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uint64_t samples;
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static u64 blkg_prfill_avg_queue_size(struct seq_file *sf,
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struct blkg_policy_data *pd, int off)
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{
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u64 samples = blkg_stat_read(&pd->stats.avg_queue_size_samples);
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u64 v = 0;
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samples = blkg_stat_read(&stats->avg_queue_size_samples);
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if (samples) {
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v = blkg_stat_read(&stats->avg_queue_size_sum);
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do_div(v, samples);
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}
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break;
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}
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case BLKIO_STAT_IDLE_TIME:
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v = blkg_stat_read(&stats->idle_time);
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break;
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case BLKIO_STAT_EMPTY_TIME:
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v = blkg_stat_read(&stats->empty_time);
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break;
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case BLKIO_STAT_DEQUEUE:
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v = blkg_stat_read(&stats->dequeue);
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break;
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case BLKIO_STAT_GROUP_WAIT_TIME:
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v = blkg_stat_read(&stats->group_wait_time);
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break;
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#endif
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default:
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WARN_ON_ONCE(1);
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}
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blkio_get_key_name(0, dname, key_str, MAX_KEY_LEN, true);
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cb->fill(cb, key_str, v);
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return v;
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if (samples) {
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v = blkg_stat_read(&pd->stats.avg_queue_size_sum);
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do_div(v, samples);
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}
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switch (type) {
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case BLKIO_STAT_MERGED:
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rws = blkg_rwstat_read(&stats->merged);
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break;
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case BLKIO_STAT_SERVICE_TIME:
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rws = blkg_rwstat_read(&stats->service_time);
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break;
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case BLKIO_STAT_WAIT_TIME:
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rws = blkg_rwstat_read(&stats->wait_time);
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break;
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case BLKIO_STAT_QUEUED:
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rws = blkg_rwstat_read(&stats->queued);
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break;
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default:
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WARN_ON_ONCE(true);
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break;
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}
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for (st = BLKG_RWSTAT_READ; st < BLKG_RWSTAT_NR; st++) {
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blkio_get_key_name(st, dname, key_str, MAX_KEY_LEN, false);
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cb->fill(cb, key_str, rws.cnt[st]);
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if (st == BLKG_RWSTAT_READ || st == BLKG_RWSTAT_WRITE)
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disk_total += rws.cnt[st];
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}
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blkio_get_key_name(BLKG_RWSTAT_TOTAL, dname, key_str, MAX_KEY_LEN,
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false);
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cb->fill(cb, key_str, disk_total);
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return disk_total;
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__blkg_prfill_u64(sf, pd, v);
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return 0;
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}
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/* print avg_queue_size */
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static int blkcg_print_avg_queue_size(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_avg_queue_size,
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BLKIO_POLICY_PROP, 0, false);
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return 0;
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}
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#endif /* CONFIG_DEBUG_BLK_CGROUP */
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static int blkio_policy_parse_and_set(char *buf, enum blkio_policy_id plid,
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int fileid, struct blkio_cgroup *blkcg)
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{
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@ -1074,14 +1115,6 @@ static int blkiocg_file_write(struct cgroup *cgrp, struct cftype *cft,
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return ret;
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}
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static const char *blkg_dev_name(struct blkio_group *blkg)
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{
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/* some drivers (floppy) instantiate a queue w/o disk registered */
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if (blkg->q->backing_dev_info.dev)
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return dev_name(blkg->q->backing_dev_info.dev);
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return NULL;
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}
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static void blkio_print_group_conf(struct cftype *cft, struct blkio_group *blkg,
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struct seq_file *m)
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{
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@ -1174,116 +1207,6 @@ static int blkiocg_file_read(struct cgroup *cgrp, struct cftype *cft,
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return 0;
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}
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static int blkio_read_blkg_stats(struct blkio_cgroup *blkcg,
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struct cftype *cft, struct cgroup_map_cb *cb,
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enum stat_type type, bool show_total, bool pcpu)
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{
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struct blkio_group *blkg;
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struct hlist_node *n;
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uint64_t cgroup_total = 0;
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spin_lock_irq(&blkcg->lock);
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hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node) {
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const char *dname = blkg_dev_name(blkg);
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int plid = BLKIOFILE_POLICY(cft->private);
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if (!dname)
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continue;
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if (pcpu)
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cgroup_total += blkio_get_stat_cpu(blkg, plid,
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||||
cb, dname, type);
|
||||
else
|
||||
cgroup_total += blkio_get_stat(blkg, plid,
|
||||
cb, dname, type);
|
||||
}
|
||||
if (show_total)
|
||||
cb->fill(cb, "Total", cgroup_total);
|
||||
|
||||
spin_unlock_irq(&blkcg->lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* All map kind of cgroup file get serviced by this function */
|
||||
static int blkiocg_file_read_map(struct cgroup *cgrp, struct cftype *cft,
|
||||
struct cgroup_map_cb *cb)
|
||||
{
|
||||
struct blkio_cgroup *blkcg;
|
||||
enum blkio_policy_id plid = BLKIOFILE_POLICY(cft->private);
|
||||
int name = BLKIOFILE_ATTR(cft->private);
|
||||
|
||||
blkcg = cgroup_to_blkio_cgroup(cgrp);
|
||||
|
||||
switch(plid) {
|
||||
case BLKIO_POLICY_PROP:
|
||||
switch(name) {
|
||||
case BLKIO_PROP_time:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_TIME, 0, 0);
|
||||
case BLKIO_PROP_sectors:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_CPU_SECTORS, 0, 1);
|
||||
case BLKIO_PROP_io_service_bytes:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_CPU_SERVICE_BYTES, 1, 1);
|
||||
case BLKIO_PROP_io_serviced:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_CPU_SERVICED, 1, 1);
|
||||
case BLKIO_PROP_io_service_time:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_SERVICE_TIME, 1, 0);
|
||||
case BLKIO_PROP_io_wait_time:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_WAIT_TIME, 1, 0);
|
||||
case BLKIO_PROP_io_merged:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_MERGED, 1, 0);
|
||||
case BLKIO_PROP_io_queued:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_QUEUED, 1, 0);
|
||||
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
||||
case BLKIO_PROP_unaccounted_time:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_UNACCOUNTED_TIME, 0, 0);
|
||||
case BLKIO_PROP_dequeue:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_DEQUEUE, 0, 0);
|
||||
case BLKIO_PROP_avg_queue_size:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_AVG_QUEUE_SIZE, 0, 0);
|
||||
case BLKIO_PROP_group_wait_time:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_GROUP_WAIT_TIME, 0, 0);
|
||||
case BLKIO_PROP_idle_time:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_IDLE_TIME, 0, 0);
|
||||
case BLKIO_PROP_empty_time:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_EMPTY_TIME, 0, 0);
|
||||
#endif
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
break;
|
||||
case BLKIO_POLICY_THROTL:
|
||||
switch(name){
|
||||
case BLKIO_THROTL_io_service_bytes:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_CPU_SERVICE_BYTES, 1, 1);
|
||||
case BLKIO_THROTL_io_serviced:
|
||||
return blkio_read_blkg_stats(blkcg, cft, cb,
|
||||
BLKIO_STAT_CPU_SERVICED, 1, 1);
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
break;
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int blkio_weight_write(struct blkio_cgroup *blkcg, int plid, u64 val)
|
||||
{
|
||||
struct blkio_group *blkg;
|
||||
@ -1369,51 +1292,51 @@ struct cftype blkio_files[] = {
|
||||
},
|
||||
{
|
||||
.name = "time",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_time),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, time)),
|
||||
.read_seq_string = blkcg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "sectors",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_sectors),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats_cpu, sectors)),
|
||||
.read_seq_string = blkcg_print_cpu_stat,
|
||||
},
|
||||
{
|
||||
.name = "io_service_bytes",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_io_service_bytes),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats_cpu, service_bytes)),
|
||||
.read_seq_string = blkcg_print_cpu_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_serviced",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_io_serviced),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats_cpu, serviced)),
|
||||
.read_seq_string = blkcg_print_cpu_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_service_time",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_io_service_time),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, service_time)),
|
||||
.read_seq_string = blkcg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_wait_time",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_io_wait_time),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, wait_time)),
|
||||
.read_seq_string = blkcg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_merged",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_io_merged),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, merged)),
|
||||
.read_seq_string = blkcg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_queued",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_io_queued),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, queued)),
|
||||
.read_seq_string = blkcg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "reset_stats",
|
||||
@ -1457,54 +1380,52 @@ struct cftype blkio_files[] = {
|
||||
},
|
||||
{
|
||||
.name = "throttle.io_service_bytes",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL,
|
||||
BLKIO_THROTL_io_service_bytes),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_THROTL,
|
||||
offsetof(struct blkio_group_stats_cpu, service_bytes)),
|
||||
.read_seq_string = blkcg_print_cpu_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "throttle.io_serviced",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL,
|
||||
BLKIO_THROTL_io_serviced),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_THROTL,
|
||||
offsetof(struct blkio_group_stats_cpu, serviced)),
|
||||
.read_seq_string = blkcg_print_cpu_rwstat,
|
||||
},
|
||||
#endif /* CONFIG_BLK_DEV_THROTTLING */
|
||||
|
||||
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
||||
{
|
||||
.name = "avg_queue_size",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_avg_queue_size),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.read_seq_string = blkcg_print_avg_queue_size,
|
||||
},
|
||||
{
|
||||
.name = "group_wait_time",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_group_wait_time),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, group_wait_time)),
|
||||
.read_seq_string = blkcg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "idle_time",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_idle_time),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, idle_time)),
|
||||
.read_seq_string = blkcg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "empty_time",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_empty_time),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, empty_time)),
|
||||
.read_seq_string = blkcg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "dequeue",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_dequeue),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, dequeue)),
|
||||
.read_seq_string = blkcg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "unaccounted_time",
|
||||
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
|
||||
BLKIO_PROP_unaccounted_time),
|
||||
.read_map = blkiocg_file_read_map,
|
||||
.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
|
||||
offsetof(struct blkio_group_stats, unaccounted_time)),
|
||||
.read_seq_string = blkcg_print_stat,
|
||||
},
|
||||
#endif
|
||||
{ } /* terminate */
|
||||
|
||||
@ -28,46 +28,10 @@ enum blkio_policy_id {
|
||||
|
||||
#ifdef CONFIG_BLK_CGROUP
|
||||
|
||||
enum stat_type {
|
||||
/* Number of IOs merged */
|
||||
BLKIO_STAT_MERGED,
|
||||
/* 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,
|
||||
/* Total time spent waiting in scheduler queue in ns */
|
||||
BLKIO_STAT_WAIT_TIME,
|
||||
/* Number of IOs queued up */
|
||||
BLKIO_STAT_QUEUED,
|
||||
|
||||
/* All the single valued stats go below this */
|
||||
BLKIO_STAT_TIME,
|
||||
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
||||
/* Time not charged to this cgroup */
|
||||
BLKIO_STAT_UNACCOUNTED_TIME,
|
||||
BLKIO_STAT_AVG_QUEUE_SIZE,
|
||||
BLKIO_STAT_IDLE_TIME,
|
||||
BLKIO_STAT_EMPTY_TIME,
|
||||
BLKIO_STAT_GROUP_WAIT_TIME,
|
||||
BLKIO_STAT_DEQUEUE
|
||||
#endif
|
||||
};
|
||||
|
||||
/* Types lower than this live in stat_arr and have subtypes */
|
||||
#define BLKIO_STAT_ARR_NR (BLKIO_STAT_QUEUED + 1)
|
||||
|
||||
/* Per cpu stats */
|
||||
enum stat_type_cpu {
|
||||
/* Total bytes transferred */
|
||||
BLKIO_STAT_CPU_SERVICE_BYTES,
|
||||
/* Total IOs serviced, post merge */
|
||||
BLKIO_STAT_CPU_SERVICED,
|
||||
|
||||
/* All the single valued stats go below this */
|
||||
BLKIO_STAT_CPU_SECTORS,
|
||||
};
|
||||
|
||||
#define BLKIO_STAT_CPU_ARR_NR (BLKIO_STAT_CPU_SERVICED + 1)
|
||||
/* cft->private [un]packing for stat printing */
|
||||
#define BLKCG_STAT_PRIV(pol, off) (((unsigned)(pol) << 16) | (off))
|
||||
#define BLKCG_STAT_POL(prv) ((unsigned)(prv) >> 16)
|
||||
#define BLKCG_STAT_OFF(prv) ((unsigned)(prv) & 0xffff)
|
||||
|
||||
enum blkg_rwstat_type {
|
||||
BLKG_RWSTAT_READ,
|
||||
@ -90,20 +54,6 @@ enum blkg_state_flags {
|
||||
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_unaccounted_time,
|
||||
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 */
|
||||
@ -112,8 +62,6 @@ enum blkcg_file_name_throtl {
|
||||
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 {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user