7.3.3 -XX:[+|-]HitachiThreadDumpWithBlockCount

Description

-XX:[+|-]HitachiThreadDumpWithBlockCount specifies whether to output the following information in the thread information of extended thread dumps: the number of times that thread processing was blocked and the number of times the thread was in the wait status.

Note that hash codes are output for the thread that is running the Java program. Hash codes are not output for the thread that is used for Java VM internal operation.

Prerequisite option

• -XX:+HitachiThreadDump

Syntax

-XX:[+|-]HitachiThreadDumpWithBlockCount

Specifiable values

Type: String

-XX:+HitachiThreadDumpWithBlockCount

Outputs the following information in the thread information of extended thread dumps: the number of times that thread processing was blocked and the number of times the thread was in the wait status.

-XX:-HitachiThreadDumpWithBlockCount

Does not output the following information as the thread information of extended thread dumps: the number of times that thread processing was blocked and the number of times the thread was in the wait status.

Default value

If the definition item is omitted:

-XX:+HitachiThreadDumpWithBlockCount

Notes

• If the output to the directory specified in the environment variable JAVACOREDIR fails, the information is output in the current directory.

• If the output to the current directory fails, the information is output as a standard error. In this case, the thread dump is not output as a standard.

• When [+|-] for the options below is specified as "-", some thread information is not output.

  Option name	Information that is not output
  -XX:[+|-]HitachiThreadDumpWithHashCode	hash_value
  -XX:[+|-]HitachiThreadDumpWithCpuTime	user_time, kernel_time
  -XX:[+|-]HitachiThreadDumpWithBlockCount	block_count, standby_count