JVM SafePointStatistics - 谁能帮助解释它(JVM SafePointSt

在启用+XX:PrintSafePointStatistics ，我看到了一个转储stdout的格式如下。任何人都可以请帮我解释列名或JVM指南，解释了这个正常吗？在JVM规范指南似乎并没有在所有覆盖头部和解释的含义。

@400000005175823c18c9d534 16762.525: GenCollectForAllocation          [     973          0              0    ]      [     0     0     0     5    53    ]  0
@400000005175823c18c9f08c 16762.586: CMS_Initial_Mark                 [     973          0              1    ]      [     0     0     0     4    24    ]  0
@400000005175823c18ca0414 16774.619: GenCollectForAllocation          [     975          0              0    ]      [     0     0     0     5    77    ]  0
@400000005175823c18ca0be4 16777.387: CMS_Final_Remark                 [     975          0              0    ]      [     0     0     0     5    18    ]  0
@400000005175823c18ca273c 16786.080: GenCollectForAllocation          [     974          0              1    ]      [     0     0     0     5     0    ]  0
@400000005175823c18ca2f0c          vmop                    [threads: total initially_running wait_to_block]    [time: spin block sync cleanup vmop] page_trap_count
@400000005175823c18ca3eac 16786.086: GenCollectFull                   [     974          0              2    ]      [     0     0     0     4    89    ]  0
@400000005175823c18ca5a04 16798.393: GenCollectForAllocation          [     974          1              1    ]      [     2     0     3     5    57    ]  1
@400000005175823c18ca69a4 16811.539: GenCollectForAllocation          [     975          2              1    ]      [     1     0     1     5    61    ]  1
@400000005175823c18ca7944 16824.551: GenCollectForAllocation          [     973          5              5    ]      [    14     0    15     5     0    ]  5
@400000005175823c18ca88e4 16824.572: GenCollectForAllocation          [     973          1              0    ]      [     0     0     0     4    60    ]  0
@400000005175823c18ca9884 16824.639: GenCollectFull                   [     973          0              4    ]      [     0     0     0     5    49    ]  0
@400000005175823c18caa054 16837.516: GenCollectForAllocation          [     973          2              2    ]      [     3     0     3     5    31    ]  2
@400000005175823c18cab7c4 16840.902: BulkRevokeBias                   [     974          0              0    ]      [     0     0     0     5     6    ]  0
@400000005175823c18cacf34 16848.729: GenCollectForAllocation          [     973          3              4    ]      [     4     0     5     4    55    ]  3
@400000005175823c18cad704 16848.795: CMS_Initial_Mark                 [     973          0              2    ]      [     0     0     0     4    24    ]  0
@400000005175823c18caf25c 16853.969: GenCollectForAllocation          [     976          1              2    ]      [     2     0     3     5    92    ]  1
@400000005175823c18cafa2c 16863.975: CMS_Final_Remark                 [     977          0              0    ]      [     0     0     0     5   352    ]  0
@400000005175823c18cb1584 16867.770: GenCollectForAllocation          [     976          0              0    ]      [     0     0     0     5   114    ]  0
@400000005175823c18cb290c 16881.496: GenCollectForAllocation          [     976          3              2    ]      [     4     0     4     5    60    ]  2
@400000005175823c18cb30dc 16891.580: RevokeBias                       [     976          0              0    ]      [     0     0     0     5     0    ]  0
@400000005175823c18cb4c34 16893.035: GenCollectForAllocation          [     976          1              1    ]      [    10     0    11     4    58    ]  1
@400000005175823c18cb5fbc 16904.123: GenCollectForAllocation          [     976          2              2    ]      [     5     0     5     5    65    ]  2
@400000005175823c18cb678c 16911.201: no vm operation                  [     975          0              0    ]      [     0     0     0     5     0    ]  0
@400000005175823c18cb82e4 16916.963: GenCollectForAllocation          [     973          0              0    ]      [     0     0     0     5    56    ]  0
@400000005175823c18cb966c 16927.307: GenCollectForAllocation          [     973          0              0    ]      [     0     0     0     4     0    ]  0
@400000005175823c18cba60c 16927.312: GenCollectForAllocation          [     973          1              1    ]      [     0     0     0     4    54    ]  0
@400000005175823c18cbb1c4 16927.373: CMS_Initial_Mark                 [     973          0              7    ]      [     0     0     0     5    25    ]  0
@400000005175823c18cbc934 16927.984: BulkRevokeBias                   [     975          1              0    ]      [     0     0     0     5     7    ]  0
@400000005175823c18cbe0a4 16938.088: GenCollectForAllocation          [     975          0              0    ]      [     0     0     0     5     0    ]  0
@400000005175823c18cbe874 16938.096: GenCollectForAllocation          [     975          0              1    ]      [     0     0     0     4    77    ]  0
@400000005175823c18cc0f84 16938.178: GenCollectFull                   [     975          1              4    ]      [     0     0     0     4    76    ]  0
@400000005175823c18cc136c 16941.404: CMS_Final_Remark                 [     975          0              0    ]      [     0     0     0     5    17    ]  0
@400000005175823c18cc230c 16948.600: GenCollectForAllocation          [     975          0              0    ]      [     0     0     0     5    33    ]  0
@400000005175823c18cc2ec4 16959.957: GenCollectForAllocation          [     975          1              1    ]      [     5     0     5     5    56    ]  1
@400000005175823c18cc4a1c 16969.805: GenCollectForAllocation          [     975          1              2    ]      [    11     0    12     5    55    ]  1
@400000005175823c18cc55d4          vmop                    [threads: total initially_running wait_to_block]    [time: spin block sync cleanup vmop] page_trap_count
@400000005175823c18cc618c 16969.879: CMS_Initial_Mark                 [     975          1              3    ]      [     0     0     0     4    22    ]  0
@400000005175823c18cc712c 16981.455: GenCollectForAllocation          [     976          1              1    ]      [     8     0     8     4    76    ]  1
@400000005175823c18cc80cc 16984.811: CMS_Final_Remark                 [     976          1              1    ]      [     2     0     3     5    23    ]  1
@400000005175823c18cc983c 16992.365: GenCollectForAllocation          [     975          5              5    ]      [    23     0    23     4    95    ]  5
@400000005175823c18cca3f4 17005.029: GenCollectForAllocation          [     975          0              0    ]      [     0     0     0     5    55    ]  0
@400000005175823c18ccbb64 17013.074: BulkRevokeBias                   [     976          0              0    ]      [     0     0     0     4     8    ]  0
@400000005175823c18ccc71c 17015.502: GenCollectForAllocation          [     975          0              0    ]      [     0     0     0     5    57    ]  0
@400000005175823c18ccde8c 17025.293: GenCollectForAllocation          [     975          0              0    ]      [     0     0     0     5    52    ]  0
@400000005175823c18ccf214 17034.678: GenCollectForAllocation          [     973          3              3    ]      [    15     0    16     4    45    ]  3
@400000005175823c18ccfdcc 17045.910: GenCollectForAllocation          [     973          0              0    ]      [     0     0     0     5    54    ]  0
@400000005175823c18cd153c 17056.883: GenCollectForAllocation          [     973          1              2    ]      [     1     0     1     5     0    ]  1

Answer 1:

我发现在Java性能一书中的简短说明：

每行包含自从发生VM推出还原点操作时，VM操作，当前数目在VM活动线程，线程的当前数量，初步运行的线程当前数量，等待阻塞线程的当前数目，的量的类型时间以毫秒为单位的线程花费在度过封锁毫秒线程纺纱，时间以毫秒为单位同步，时间量以毫秒线程所花费的时间线的量用过的清洗，时间量以毫秒计的VM操作中度过，和网页陷阱的数量。
摘要被印刷在输出与以毫秒的最大同步时间和还原点的操作，花的最大时间量沿总结不同还原点的操作次数的结束。
有用的应用，强调低延迟和想要延迟事件HotSpot虚拟机引起的等待时间作为还原点操作结果相关。

又见-XX:+PrintGCApplicationStoppedTime和-XX+PrintGCApplicationConcurrentTime 。

Answer 2:

尝试在PrintSafepointStatistics此页面。我认为一些进一步的研究，你会发现一些对这项有益的。