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8216283: Allow shorter method sampling interval than 10 ms

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Reviewed-by: mgronlun
This commit is contained in:
Erik Gahlin 2019-06-06 20:19:03 +02:00
parent 948577bb1f
commit 60b662d85e
3 changed files with 73 additions and 15 deletions
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4
src/hotspot/share/jfr/periodic/sampling/jfrThreadSampler.cpp
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@ -462,8 +462,8 @@ void JfrThreadSampler::run() {
last_native_ms = last_java_ms;
}
_sample.signal();
jlong java_interval = _interval_java == 0 ? max_jlong : MAX2<jlong>(_interval_java, 10);
jlong native_interval = _interval_native == 0 ? max_jlong : MAX2<jlong>(_interval_native, 10);
jlong java_interval = _interval_java == 0 ? max_jlong : MAX2<jlong>(_interval_java, 1);
jlong native_interval = _interval_native == 0 ? max_jlong : MAX2<jlong>(_interval_native, 1);
jlong now_ms = get_monotonic_ms();

41
src/jdk.jfr/share/conf/jfr/default.jfc
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@ -140,12 +140,12 @@
<event name="jdk.ExecutionSample">
<setting name="enabled" control="method-sampling-enabled">true</setting>
<setting name="period" control="method-sampling-interval">20 ms</setting>
<setting name="period" control="method-sampling-java-interval">20 ms</setting>
</event>
<event name="jdk.NativeMethodSample">
<setting name="enabled" control="method-sampling-enabled">true</setting>
<setting name="period" control="method-sampling-interval">20 ms</setting>
<setting name="period" control="method-sampling-native-interval">20 ms</setting>
</event>
<event name="jdk.SafepointBegin">
@ -812,13 +812,42 @@
</condition>
<selection name="method-sampling-interval" default="normal" label="Method Sampling">
<option label="Off" name="off">999 d</option>
<option label="Normal" name="normal">20 ms</option>
<option label="Maximum" name="maximum">10 ms</option>
<option label="Off" name="off">off</option>
<option label="Normal" name="normal">normal</option>
<option label="High" name="high">high</option>
<option label="Ludicrous (High Overhead)" name="ludicrous">ludicrous</option>
</selection>
<condition name="method-sampling-java-interval" true="999 d">
<test name="method-sampling-interval" operator="equal" value="off"/>
</condition>
<condition name="method-sampling-java-interval" true="20 ms">
<test name="method-sampling-interval" operator="equal" value="normal"/>
</condition>
<condition name="method-sampling-java-interval" true="10 ms">
<test name="method-sampling-interval" operator="equal" value="high"/>
</condition>
<condition name="method-sampling-java-interval" true="1 ms">
<test name="method-sampling-interval" operator="equal" value="ludicrous"/>
</condition>
<condition name="method-sampling-native-interval" true="999 d">
<test name="method-sampling-interval" operator="equal" value="off"/>
</condition>
<condition name="method-sampling-native-interval" true="20 ms">
<or>
<test name="method-sampling-interval" operator="equal" value="normal"/>
<test name="method-sampling-interval" operator="equal" value="high"/>
<test name="method-sampling-interval" operator="equal" value="ludicrous"/>
</or>
</condition>
<condition name="method-sampling-enabled" true="false" false="true">
<test name="method-sampling-interval" operator="equal" value="999 d"/>
<test name="method-sampling-interval" operator="equal" value="off"/>
</condition>
<selection name="thread-dump-interval" default="normal" label="Thread Dump">

43
src/jdk.jfr/share/conf/jfr/profile.jfc
View File

@ -140,12 +140,12 @@
<event name="jdk.ExecutionSample">
<setting name="enabled" control="method-sampling-enabled">true</setting>
<setting name="period" control="method-sampling-interval">10 ms</setting>
<setting name="period" control="method-sampling-java-interval">10 ms</setting>
</event>
<event name="jdk.NativeMethodSample">
<setting name="enabled" control="method-sampling-enabled">true</setting>
<setting name="period" control="method-sampling-interval">10 ms</setting>
<setting name="period" control="method-sampling-native-interval">20 ms</setting>
</event>
<event name="jdk.SafepointBegin">
@ -812,14 +812,43 @@
<test name="compiler-level" operator="equal" value="all"/>
</condition>
<selection name="method-sampling-interval" default="maximum" label="Method Sampling">
<option label="Off" name="off">999 d</option>
<option label="Normal" name="normal">20 ms</option>
<option label="Maximum" name="maximum">10 ms</option>
<selection name="method-sampling-interval" default="normal" label="Method Sampling">
<option label="Off" name="off">off</option>
<option label="Normal" name="normal">normal</option>
<option label="High" name="high">high</option>
<option label="Ludicrous (High Overhead)" name="ludicrous">ludicrous</option>
</selection>
<condition name="method-sampling-java-interval" true="999 d">
<test name="method-sampling-interval" operator="equal" value="off"/>
</condition>
<condition name="method-sampling-java-interval" true="20 ms">
<test name="method-sampling-interval" operator="equal" value="normal"/>
</condition>
<condition name="method-sampling-java-interval" true="10 ms">
<test name="method-sampling-interval" operator="equal" value="high"/>
</condition>
<condition name="method-sampling-java-interval" true="1 ms">
<test name="method-sampling-interval" operator="equal" value="ludicrous"/>
</condition>
<condition name="method-sampling-native-interval" true="999 d">
<test name="method-sampling-interval" operator="equal" value="off"/>
</condition>
<condition name="method-sampling-native-interval" true="20 ms">
<or>
<test name="method-sampling-interval" operator="equal" value="normal"/>
<test name="method-sampling-interval" operator="equal" value="high"/>
<test name="method-sampling-interval" operator="equal" value="ludicrous"/>
</or>
</condition>
<condition name="method-sampling-enabled" true="false" false="true">
<test name="method-sampling-interval" operator="equal" value="999 d"/>
<test name="method-sampling-interval" operator="equal" value="off"/>
</condition>
<selection name="thread-dump-interval" default="everyMinute" label="Thread Dump">