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[Qemu-devel] [PATCH 4/4] block: Add iops_sector _count to do the iops ac
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From: |
Benoît Canet |
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Subject: |
[Qemu-devel] [PATCH 4/4] block: Add iops_sector _count to do the iops accounting for a given io size . |
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Date: |
Mon, 22 Jul 2013 14:33:26 +0200 |
This feature can be used in case where users are avoiding the iops limit by
doing jumbo I/Os hammering the storage backend.
Signed-off-by: Benoit Canet <address@hidden>
---
block.c | 8 +++++++-
block/qapi.c | 4 ++++
blockdev.c | 22 +++++++++++++++++++++-
hmp.c | 8 ++++++--
include/block/block_int.h | 1 +
qapi-schema.json | 10 ++++++++--
qemu-options.hx | 2 +-
qmp-commands.hx | 8 ++++++--
8 files changed, 54 insertions(+), 9 deletions(-)
diff --git a/block.c b/block.c
index 2d6e9b4..cfa890d 100644
--- a/block.c
+++ b/block.c
@@ -337,6 +337,12 @@ static bool
bdrv_is_any_threshold_exceeded(BlockDriverState *bs, int nb_sectors,
bool is_write)
{
bool bps_ret, iops_ret;
+ double ios = 1.0;
+
+ if (bs->io_limits.iops_sector_count) {
+ ios = ((double) nb_sectors) / bs->io_limits.iops_sector_count;
+ ios = MAX(ios, 1.0);
+ }
/* check if any bandwith or per IO threshold has been exceeded */
bps_ret = bdrv_is_bps_threshold_exceeded(bs, is_write);
@@ -360,7 +366,7 @@ static bool bdrv_is_any_threshold_exceeded(BlockDriverState
*bs, int nb_sectors,
/* the IO is authorized so do the accounting and return false */
bs->leaky_buckets.bytes[is_write] += (int64_t)nb_sectors *
BDRV_SECTOR_SIZE;
- bs->leaky_buckets.ios[is_write]++;
+ bs->leaky_buckets.ios[is_write] += ios;
return false;
}
diff --git a/block/qapi.c b/block/qapi.c
index 03f1604..f81081c 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -259,6 +259,10 @@ void bdrv_query_info(BlockDriverState *bs,
bs->io_limits.iops_threshold[BLOCK_IO_LIMIT_WRITE];
info->inserted->iops_wr_threshold =
bs->io_limits.iops_threshold[BLOCK_IO_LIMIT_WRITE];
+ info->inserted->has_iops_sector_count =
+ bs->io_limits.iops_sector_count;
+ info->inserted->iops_sector_count =
+ bs->io_limits.iops_sector_count;
}
bs0 = bs;
diff --git a/blockdev.c b/blockdev.c
index 9bda359..8ddd710 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -352,6 +352,11 @@ static bool do_check_io_limits(BlockIOLimit *io_limits,
Error **errp)
return false;
}
+ if (io_limits->iops_sector_count < 0) {
+ error_setg(errp, "iops_sector_count must be 0 or greater");
+ return false;
+ }
+
return true;
}
@@ -563,6 +568,10 @@ DriveInfo *drive_init(QemuOpts *all_opts,
BlockInterfaceType block_default_type)
qemu_opt_get_number(opts, "iops_wr_threshold",
io_limits.iops[BLOCK_IO_LIMIT_WRITE] /
THROTTLE_HZ);
+ io_limits.iops_sector_count =
+ qemu_opt_get_number(opts, "iops_sector_count", 0);
+
+
if (!do_check_io_limits(&io_limits, &error)) {
error_report("%s", error_get_pretty(error));
error_free(error);
@@ -1260,7 +1269,9 @@ void qmp_block_set_io_throttle(const char *device,
int64_t bps, int64_t bps_rd,
bool has_iops_rd_threshold,
int64_t iops_rd_threshold,
bool has_iops_wr_threshold,
- int64_t iops_wr_threshold, Error **errp)
+ int64_t iops_wr_threshold,
+ bool has_iops_sector_count,
+ int64_t iops_sector_count, Error **errp)
{
BlockIOLimit io_limits;
BlockDriverState *bs;
@@ -1283,6 +1294,7 @@ void qmp_block_set_io_throttle(const char *device,
int64_t bps, int64_t bps_rd,
io_limits.iops_threshold[BLOCK_IO_LIMIT_TOTAL] = iops / THROTTLE_HZ;
io_limits.iops_threshold[BLOCK_IO_LIMIT_READ] = iops_rd / THROTTLE_HZ;
io_limits.iops_threshold[BLOCK_IO_LIMIT_WRITE] = iops_wr / THROTTLE_HZ;
+ io_limits.iops_sector_count = 0;
/* override them with givens values if present */
if (has_bps_threshold) {
@@ -1304,6 +1316,10 @@ void qmp_block_set_io_throttle(const char *device,
int64_t bps, int64_t bps_rd,
io_limits.iops_threshold[BLOCK_IO_LIMIT_WRITE] = iops_wr_threshold;
}
+ if (has_iops_sector_count) {
+ io_limits.iops_sector_count = iops_sector_count;
+ }
+
if (!do_check_io_limits(&io_limits, errp)) {
return;
}
@@ -2007,6 +2023,10 @@ QemuOptsList qemu_common_drive_opts = {
.type = QEMU_OPT_NUMBER,
.help = "write bytes threshold",
},{
+ .name = "iops_sector_count",
+ .type = QEMU_OPT_NUMBER,
+ .help = "when limiting by iops max size of an I/O in sector",
+ },{
.name = "copy-on-read",
.type = QEMU_OPT_BOOL,
.help = "copy read data from backing file into image file",
diff --git a/hmp.c b/hmp.c
index d75aa99..3912305 100644
--- a/hmp.c
+++ b/hmp.c
@@ -347,7 +347,8 @@ void hmp_info_block(Monitor *mon, const QDict *qdict)
" iops_wr=%" PRId64
" iops_threshold=%" PRId64
" iops_rd_threshold=%" PRId64
- " iops_wr_threshold=%" PRId64 "\n",
+ " iops_wr_threshold=%" PRId64
+ " iops_sector_count=%" PRId64 "\n",
info->value->inserted->bps,
info->value->inserted->bps_rd,
info->value->inserted->bps_wr,
@@ -359,7 +360,8 @@ void hmp_info_block(Monitor *mon, const QDict *qdict)
info->value->inserted->iops_wr,
info->value->inserted->iops_threshold,
info->value->inserted->iops_rd_threshold,
- info->value->inserted->iops_wr_threshold);
+ info->value->inserted->iops_wr_threshold,
+ info->value->inserted->iops_sector_count);
} else {
monitor_printf(mon, " [not inserted]");
}
@@ -1120,6 +1122,8 @@ void hmp_block_set_io_throttle(Monitor *mon, const QDict
*qdict)
false,
0,
false,
+ 0,
+ false, /* No default I/O size */
0, &err);
hmp_handle_error(mon, &err);
}
diff --git a/include/block/block_int.h b/include/block/block_int.h
index e32ad1f..74d7503 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -76,6 +76,7 @@ typedef struct BlockIOLimit {
int64_t iops[3];
int64_t bps_threshold[3];
int64_t iops_threshold[3];
+ int64_t iops_sector_count;
} BlockIOLimit;
typedef struct BlockIOBaseValue {
diff --git a/qapi-schema.json b/qapi-schema.json
index a6f3792..d579fda 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -781,6 +781,8 @@
#
# @iops_wr_threshold: #optional write I/O operations threshold (Since 1.6)
#
+# @iops_sector_count: #optional an I/O size in sector (Since 1.6)
+#
# Since: 0.14.0
#
# Notes: This interface is only found in @BlockInfo.
@@ -794,7 +796,8 @@
'image': 'ImageInfo',
'*bps_threshold': 'int', '*bps_rd_threshold': 'int',
'*bps_wr_threshold': 'int', '*iops_threshold': 'int',
- '*iops_rd_threshold': 'int', '*iops_wr_threshold': 'int' }}
+ '*iops_rd_threshold': 'int', '*iops_wr_threshold': 'int',
+ '*iops_sector_count': 'int' } }
##
# @BlockDeviceIoStatus:
@@ -2185,6 +2188,8 @@
#
# @iops_wr_threshold: #optional write I/O operations threshold (Since 1.6)
#
+# @iops_sector_count: #optional an I/O size in sector (Since 1.6)
+#
# Returns: Nothing on success
# If @device is not a valid block device, DeviceNotFound
#
@@ -2195,7 +2200,8 @@
'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
'*bps_threshold': 'int', '*bps_rd_threshold': 'int',
'*bps_wr_threshold': 'int', '*iops_threshold': 'int',
- '*iops_rd_threshold': 'int', '*iops_wr_threshold': 'int' }}
+ '*iops_rd_threshold': 'int', '*iops_wr_threshold': 'int',
+ '*iops_sector_count': 'int' }}
##
# @block-stream:
diff --git a/qemu-options.hx b/qemu-options.hx
index 4d5ee66..2f417b8 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -409,7 +409,7 @@ DEF("drive", HAS_ARG, QEMU_OPTION_drive,
"
[,cache=writethrough|writeback|none|directsync|unsafe][,format=f]\n"
" [,serial=s][,addr=A][,id=name][,aio=threads|native]\n"
" [,readonly=on|off][,copy-on-read=on|off]\n"
- "
[[,bps=b]|[[,bps_rd=r][,bps_wr=w]]][[,iops=i]|[[,iops_rd=r][,iops_wr=w][,bps_threshold=bt]|[[,bps_rd_threshold=rt][,bps_wr_threshold=wt]]][[,iops_threshold=it]|[[,iops_rd_threshold=rt][,iops_wr_threshold=wt]]\n"
+ "
[[,bps=b]|[[,bps_rd=r][,bps_wr=w]]][[,iops=i]|[[,iops_rd=r][,iops_wr=w][,bps_threshold=bt]|[[,bps_rd_threshold=rt][,bps_wr_threshold=wt]]][[,iops_threshold=it]|[[,iops_rd_threshold=rt][,iops_wr_threshold=wt][,iops_sector_count=cnt]]\n"
" use 'file' as a drive image\n", QEMU_ARCH_ALL)
STEXI
@item -drive @var{option}[,@var{option}[,@var{option}[,...]]]
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 11c638a..b40db2f 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1385,7 +1385,7 @@ EQMP
{
.name = "block_set_io_throttle",
- .args_type =
"device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_threshold:l?,bps_rd_threshold:l?,bps_wr_threshold:l?,iops_threshold:l?,iops_rd_threshold:l?,iops_wr_threshold:l?",
+ .args_type =
"device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_threshold:l?,bps_rd_threshold:l?,bps_wr_threshold:l?,iops_threshold:l?,iops_rd_threshold:l?,iops_wr_threshold:l?,iops_sector_count:l?",
.mhandler.cmd_new = qmp_marshal_input_block_set_io_throttle,
},
@@ -1410,6 +1410,7 @@ Arguments:
- "iops_threshold": total I/O operations threshold(json-int)
- "iops_rd_threshold": read I/O operations threshold(json-int)
- "iops_wr_threshold": write I/O operations threshold(json-int)
+- "iops_sector_count": I/O sector count when limiting(json-int)
Example:
@@ -1425,7 +1426,8 @@ Example:
"bps_wr_threshold": "0",
"iops_threshold": "0",
"iops_rd_threshold": "0",
- "iops_wr_threshold": "0" } }
+ "iops_wr_threshold": "0",
+ "iops_sector_count": "0" } }
<- { "return": {} }
EQMP
@@ -1772,6 +1774,7 @@ Each json-object contain the following:
- "iops_threshold": total I/O operations threshold(json-int)
- "iops_rd_threshold": read I/O operations threshold(json-int)
- "iops_wr_threshold": write I/O operations threshold(json-int)
+ - "iops_sector_count": I/O sector count when limiting(json-int)
- "image": the detail of the image, it is a json-object containing
the following:
- "filename": image file name (json-string)
@@ -1847,6 +1850,7 @@ Example:
"iops_threshold": "0",
"iops_rd_threshold": "0",
"iops_wr_threshold": "0",
+ "iops_sector_count": "0",
"image":{
"filename":"disks/test.qcow2",
"format":"qcow2",
--
1.7.10.4