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| author | Kent Overstreet <kmo@daterainc.com> | 2014-02-25 17:34:21 -0800 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2014-03-18 12:22:35 -0700 |
| commit | 15754020524a56517df082799f07de880f4b29e2 (patch) | |
| tree | 1577f69ab2606e08c4c88ef8d1986a2a25835be9 /drivers/md | |
| parent | 7159b1ad3dded9da040b5c608acf3d52d50f661e (diff) | |
| download | linux-15754020524a56517df082799f07de880f4b29e2.tar.bz2 | |
bcache: Improve priority_stats
Break down data into clean data/dirty data/metadata.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/bcache/sysfs.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index d8458d477a12..662b9484ed5e 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -761,7 +761,9 @@ SHOW(__bch_cache) int cmp(const void *l, const void *r) { return *((uint16_t *) r) - *((uint16_t *) l); } - size_t n = ca->sb.nbuckets, i, unused, btree; + struct bucket *b; + size_t n = ca->sb.nbuckets, i; + size_t unused = 0, available = 0, dirty = 0, meta = 0; uint64_t sum = 0; /* Compute 31 quantiles */ uint16_t q[31], *p, *cached; @@ -772,6 +774,17 @@ SHOW(__bch_cache) return -ENOMEM; mutex_lock(&ca->set->bucket_lock); + for_each_bucket(b, ca) { + if (!GC_SECTORS_USED(b)) + unused++; + if (GC_MARK(b) == GC_MARK_RECLAIMABLE) + available++; + if (GC_MARK(b) == GC_MARK_DIRTY) + dirty++; + if (GC_MARK(b) == GC_MARK_METADATA) + meta++; + } + for (i = ca->sb.first_bucket; i < n; i++) p[i] = ca->buckets[i].prio; mutex_unlock(&ca->set->bucket_lock); @@ -786,10 +799,7 @@ SHOW(__bch_cache) while (cached < p + n && *cached == BTREE_PRIO) - cached++; - - btree = cached - p; - n -= btree; + cached++, n--; for (i = 0; i < n; i++) sum += INITIAL_PRIO - cached[i]; @@ -805,12 +815,16 @@ SHOW(__bch_cache) ret = scnprintf(buf, PAGE_SIZE, "Unused: %zu%%\n" + "Clean: %zu%%\n" + "Dirty: %zu%%\n" "Metadata: %zu%%\n" "Average: %llu\n" "Sectors per Q: %zu\n" "Quantiles: [", unused * 100 / (size_t) ca->sb.nbuckets, - btree * 100 / (size_t) ca->sb.nbuckets, sum, + available * 100 / (size_t) ca->sb.nbuckets, + dirty * 100 / (size_t) ca->sb.nbuckets, + meta * 100 / (size_t) ca->sb.nbuckets, sum, n * ca->sb.bucket_size / (ARRAY_SIZE(q) + 1)); for (i = 0; i < ARRAY_SIZE(q); i++) |