diff options
Diffstat (limited to 'drivers/lightnvm/pblk-sysfs.c')
| -rw-r--r-- | drivers/lightnvm/pblk-sysfs.c | 87 |
1 files changed, 85 insertions, 2 deletions
diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c index beed99936c89..c2cf6c939752 100644 --- a/drivers/lightnvm/pblk-sysfs.c +++ b/drivers/lightnvm/pblk-sysfs.c @@ -340,15 +340,62 @@ static ssize_t pblk_sysfs_get_write_amp_trip(struct pblk *pblk, char *page) atomic64_read(&pblk->pad_wa) - pblk->pad_rst_wa, page); } +static long long bucket_percentage(unsigned long long bucket, + unsigned long long total) +{ + int p = bucket * 100; + + p = div_u64(p, total); + + return p; +} + +static ssize_t pblk_sysfs_get_padding_dist(struct pblk *pblk, char *page) +{ + int sz = 0; + unsigned long long total; + unsigned long long total_buckets = 0; + int buckets = pblk->min_write_pgs - 1; + int i; + + total = atomic64_read(&pblk->nr_flush) - pblk->nr_flush_rst; + if (!total) { + for (i = 0; i < (buckets + 1); i++) + sz += snprintf(page + sz, PAGE_SIZE - sz, + "%d:0 ", i); + sz += snprintf(page + sz, PAGE_SIZE - sz, "\n"); + + return sz; + } + + for (i = 0; i < buckets; i++) + total_buckets += atomic64_read(&pblk->pad_dist[i]); + + sz += snprintf(page + sz, PAGE_SIZE - sz, "0:%lld%% ", + bucket_percentage(total - total_buckets, total)); + + for (i = 0; i < buckets; i++) { + unsigned long long p; + + p = bucket_percentage(atomic64_read(&pblk->pad_dist[i]), + total); + sz += snprintf(page + sz, PAGE_SIZE - sz, "%d:%lld%% ", + i + 1, p); + } + sz += snprintf(page + sz, PAGE_SIZE - sz, "\n"); + + return sz; +} + #ifdef CONFIG_NVM_DEBUG static ssize_t pblk_sysfs_stats_debug(struct pblk *pblk, char *page) { return snprintf(page, PAGE_SIZE, - "%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\n", + "%lu\t%lu\t%ld\t%llu\t%ld\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\n", atomic_long_read(&pblk->inflight_writes), atomic_long_read(&pblk->inflight_reads), atomic_long_read(&pblk->req_writes), - atomic_long_read(&pblk->nr_flush), + (u64)atomic64_read(&pblk->nr_flush), atomic_long_read(&pblk->padded_writes), atomic_long_read(&pblk->padded_wb), atomic_long_read(&pblk->sub_writes), @@ -426,6 +473,32 @@ static ssize_t pblk_sysfs_set_write_amp_trip(struct pblk *pblk, } +static ssize_t pblk_sysfs_set_padding_dist(struct pblk *pblk, + const char *page, size_t len) +{ + size_t c_len; + int reset_value; + int buckets = pblk->min_write_pgs - 1; + int i; + + c_len = strcspn(page, "\n"); + if (c_len >= len) + return -EINVAL; + + if (kstrtouint(page, 0, &reset_value)) + return -EINVAL; + + if (reset_value != 0) + return -EINVAL; + + for (i = 0; i < buckets; i++) + atomic64_set(&pblk->pad_dist[i], 0); + + pblk->nr_flush_rst = atomic64_read(&pblk->nr_flush); + + return len; +} + static struct attribute sys_write_luns = { .name = "write_luns", .mode = 0444, @@ -486,6 +559,11 @@ static struct attribute sys_write_amp_trip = { .mode = 0644, }; +static struct attribute sys_padding_dist = { + .name = "padding_dist", + .mode = 0644, +}; + #ifdef CONFIG_NVM_DEBUG static struct attribute sys_stats_debug_attr = { .name = "stats", @@ -506,6 +584,7 @@ static struct attribute *pblk_attrs[] = { &sys_lines_info_attr, &sys_write_amp_mileage, &sys_write_amp_trip, + &sys_padding_dist, #ifdef CONFIG_NVM_DEBUG &sys_stats_debug_attr, #endif @@ -539,6 +618,8 @@ static ssize_t pblk_sysfs_show(struct kobject *kobj, struct attribute *attr, return pblk_sysfs_get_write_amp_mileage(pblk, buf); else if (strcmp(attr->name, "write_amp_trip") == 0) return pblk_sysfs_get_write_amp_trip(pblk, buf); + else if (strcmp(attr->name, "padding_dist") == 0) + return pblk_sysfs_get_padding_dist(pblk, buf); #ifdef CONFIG_NVM_DEBUG else if (strcmp(attr->name, "stats") == 0) return pblk_sysfs_stats_debug(pblk, buf); @@ -557,6 +638,8 @@ static ssize_t pblk_sysfs_store(struct kobject *kobj, struct attribute *attr, return pblk_sysfs_set_sec_per_write(pblk, buf, len); else if (strcmp(attr->name, "write_amp_trip") == 0) return pblk_sysfs_set_write_amp_trip(pblk, buf, len); + else if (strcmp(attr->name, "padding_dist") == 0) + return pblk_sysfs_set_padding_dist(pblk, buf, len); return 0; } |