From: Jes Sorensen <[email protected]> This exports bytes of read/write/discard per bucket to sysfs
Signed-off-by: Jes Sorensen <[email protected]> --- block/blk-sysfs.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 81566432828d..63fdda5e6ccb 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -530,6 +530,23 @@ static ssize_t queue_dax_show(struct request_queue *q, char *page) return queue_var_show(blk_queue_dax(q), page); } +static ssize_t queue_stat_show(struct request_queue *q, char *p) +{ + char name[3][8] = {"read", "write", "discard"}; + int bkt, off, i; + + off = 0; + for (i = 0; i < 3; i++) { + off += sprintf(p + off, "%s: ", name[i]); + for (bkt = 0; bkt < (BLK_DEV_STATS_BKTS / 3); bkt++) { + off += sprintf(p + off, "%llu ", + q->dev_stat[i + 3 * bkt].size); + } + off += sprintf(p + off, "\n"); + } + return off; +} + static ssize_t queue_histstat_show(struct request_queue *q, char *page) { return queue_var_show(test_bit(QUEUE_FLAG_HISTSTATS, @@ -759,6 +776,11 @@ static struct queue_sysfs_entry throtl_sample_time_entry = { }; #endif +static struct queue_sysfs_entry queue_stat_entry = { + .attr = {.name = "stat", .mode = 0444 }, + .show = queue_stat_show, +}; + static struct queue_sysfs_entry queue_histstat_entry = { .attr = {.name = "histstat", .mode = 0644 }, .show = queue_histstat_show, @@ -804,6 +826,7 @@ static struct attribute *queue_attrs[] = { #ifdef CONFIG_BLK_DEV_THROTTLING_LOW &throtl_sample_time_entry.attr, #endif + &queue_stat_entry.attr, &queue_histstat_entry.attr, NULL, }; -- 2.17.1
