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OneMeasurementTimeSeries.java
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Created
Sun, Oct 20, 07:16
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text/x-c++
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Tue, Oct 22, 07:16 (1 d, 23 h)
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21810336
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R7507 YCSB
OneMeasurementTimeSeries.java
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/**
* Copyright (c) 2010 Yahoo! Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License. See accompanying
* LICENSE file.
*/
package
com.yahoo.ycsb.measurements
;
import
java.io.IOException
;
import
java.text.DecimalFormat
;
import
java.util.HashMap
;
import
java.util.Properties
;
import
java.util.Vector
;
import
com.yahoo.ycsb.measurements.exporter.MeasurementsExporter
;
class
SeriesUnit
{
/**
* @param time
* @param average
*/
public
SeriesUnit
(
long
time
,
double
average
)
{
this
.
time
=
time
;
this
.
average
=
average
;
}
public
long
time
;
public
double
average
;
}
/**
* A time series measurement of a metric, such as READ LATENCY.
*/
public
class
OneMeasurementTimeSeries
extends
OneMeasurement
{
/**
* Granularity for time series; measurements will be averaged in chunks of this granularity. Units are milliseconds.
*/
public
static
final
String
GRANULARITY
=
"timeseries.granularity"
;
public
static
final
String
GRANULARITY_DEFAULT
=
"1000"
;
int
_granularity
;
Vector
<
SeriesUnit
>
_measurements
;
long
start
=-
1
;
long
currentunit
=-
1
;
int
count
=
0
;
int
sum
=
0
;
int
operations
=
0
;
long
totallatency
=
0
;
//keep a windowed version of these stats for printing status
int
windowoperations
=
0
;
long
windowtotallatency
=
0
;
int
min
=-
1
;
int
max
=-
1
;
private
HashMap
<
Integer
,
int
[]>
returncodes
;
public
OneMeasurementTimeSeries
(
String
name
,
Properties
props
)
{
super
(
name
);
_granularity
=
Integer
.
parseInt
(
props
.
getProperty
(
GRANULARITY
,
GRANULARITY_DEFAULT
));
_measurements
=
new
Vector
<
SeriesUnit
>();
returncodes
=
new
HashMap
<
Integer
,
int
[]>();
}
void
checkEndOfUnit
(
boolean
forceend
)
{
long
now
=
System
.
currentTimeMillis
();
if
(
start
<
0
)
{
currentunit
=
0
;
start
=
now
;
}
long
unit
=((
now
-
start
)/
_granularity
)*
_granularity
;
if
(
(
unit
>
currentunit
)
||
(
forceend
)
)
{
double
avg
=((
double
)
sum
)/((
double
)
count
);
_measurements
.
add
(
new
SeriesUnit
(
currentunit
,
avg
));
currentunit
=
unit
;
count
=
0
;
sum
=
0
;
}
}
@Override
public
void
measure
(
int
latency
)
{
checkEndOfUnit
(
false
);
count
++;
sum
+=
latency
;
totallatency
+=
latency
;
operations
++;
windowoperations
++;
windowtotallatency
+=
latency
;
if
(
latency
>
max
)
{
max
=
latency
;
}
if
(
(
latency
<
min
)
||
(
min
<
0
)
)
{
min
=
latency
;
}
}
@Override
public
void
exportMeasurements
(
MeasurementsExporter
exporter
)
throws
IOException
{
checkEndOfUnit
(
true
);
exporter
.
write
(
getName
(),
"Operations"
,
operations
);
exporter
.
write
(
getName
(),
"AverageLatency(us)"
,
(((
double
)
totallatency
)/((
double
)
operations
)));
exporter
.
write
(
getName
(),
"MinLatency(us)"
,
min
);
exporter
.
write
(
getName
(),
"MaxLatency(us)"
,
max
);
//TODO: 95th and 99th percentile latency
for
(
Integer
I
:
returncodes
.
keySet
())
{
int
[]
val
=
returncodes
.
get
(
I
);
exporter
.
write
(
getName
(),
"Return="
+
I
,
val
[
0
]);
}
for
(
SeriesUnit
unit
:
_measurements
)
{
exporter
.
write
(
getName
(),
Long
.
toString
(
unit
.
time
),
unit
.
average
);
}
}
@Override
public
void
reportReturnCode
(
int
code
)
{
Integer
Icode
=
code
;
if
(!
returncodes
.
containsKey
(
Icode
))
{
int
[]
val
=
new
int
[
1
];
val
[
0
]=
0
;
returncodes
.
put
(
Icode
,
val
);
}
returncodes
.
get
(
Icode
)[
0
]++;
}
@Override
public
String
getSummary
()
{
if
(
windowoperations
==
0
)
{
return
""
;
}
DecimalFormat
d
=
new
DecimalFormat
(
"#.##"
);
double
report
=((
double
)
windowtotallatency
)/((
double
)
windowoperations
);
windowtotallatency
=
0
;
windowoperations
=
0
;
return
"["
+
getName
()+
" AverageLatency(us)="
+
d
.
format
(
report
)+
"]"
;
}
}
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