motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 07:43:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

block: latency accounting

Browse source 
Account the total latency for read/write/flush requests.  This allows
management tools to average it based on a snapshot of the nr ops
counters and allow checking for SLAs or provide statistics.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Christoph Hellwig 2011-08-25 08:26:10 +02:00 • committed by Kevin Wolf
parent a597e79ce1
commit c488c7f649
4 changed files with 38 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

20
block.c
View file

@ -1916,12 +1916,18 @@ static void bdrv_stats_iter(QObject *data, void *opaque)
" rd_operations=%" PRId64
" wr_operations=%" PRId64
" flush_operations=%" PRId64
" wr_total_time_ns=%" PRId64
" rd_total_time_ns=%" PRId64
" flush_total_time_ns=%" PRId64
"\n",
qdict_get_int(qdict, "rd_bytes"),
qdict_get_int(qdict, "wr_bytes"),
qdict_get_int(qdict, "rd_operations"),
qdict_get_int(qdict, "wr_operations"),
qdict_get_int(qdict, "flush_operations"));
qdict_get_int(qdict, "flush_operations"),
qdict_get_int(qdict, "wr_total_time_ns"),
qdict_get_int(qdict, "rd_total_time_ns"),
qdict_get_int(qdict, "flush_total_time_ns"));
}
void bdrv_stats_print(Monitor *mon, const QObject *data)
@ -1940,7 +1946,10 @@ static QObject* bdrv_info_stats_bs(BlockDriverState *bs)
"'rd_operations': %" PRId64 ","
"'wr_operations': %" PRId64 ","
"'wr_highest_offset': %" PRId64 ","
"'flush_operations': %" PRId64
"'flush_operations': %" PRId64 ","
"'wr_total_time_ns': %" PRId64 ","
"'rd_total_time_ns': %" PRId64 ","
"'flush_total_time_ns': %" PRId64
"} }",
bs->nr_bytes[BDRV_ACCT_READ],
bs->nr_bytes[BDRV_ACCT_WRITE],
@ -1948,7 +1957,10 @@ static QObject* bdrv_info_stats_bs(BlockDriverState *bs)
bs->nr_ops[BDRV_ACCT_WRITE],
bs->wr_highest_sector *
(uint64_t)BDRV_SECTOR_SIZE,
bs->nr_ops[BDRV_ACCT_FLUSH]);
bs->nr_ops[BDRV_ACCT_FLUSH],
bs->total_time_ns[BDRV_ACCT_WRITE],
bs->total_time_ns[BDRV_ACCT_READ],
bs->total_time_ns[BDRV_ACCT_FLUSH]);
dict = qobject_to_qdict(res);
if (*bs->device_name) {
@ -3160,6 +3172,7 @@ bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, int64_t bytes,
assert(type < BDRV_MAX_IOTYPE);
cookie->bytes = bytes;
cookie->start_time_ns = get_clock();
cookie->type = type;
}
@ -3170,6 +3183,7 @@ bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie)
bs->nr_bytes[cookie->type] += cookie->bytes;
bs->nr_ops[cookie->type]++;
bs->total_time_ns[cookie->type] += get_clock() - cookie->start_time_ns;
}
int bdrv_img_create(const char *filename, const char *fmt,