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src/java.base/linux/classes/jdk/internal/platform/CgroupSubsystemFactory.java

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@  rev 57734 : Review feedback
|
o  rev 57733 : 8231111: Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy
|  Reviewed-by: bobv, mchung
~
o  rev 56862 : 8231111: Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy
|  Reviewed-by: bobv
~


  28 import java.io.IOException;
  29 import java.nio.file.Paths;
  30 import java.util.HashMap;
  31 import java.util.List;
  32 import java.util.Map;
  33 import java.util.stream.Collectors;
  34 import java.util.stream.Stream;
  35 
  36 import jdk.internal.platform.cgroupv1.CgroupV1Subsystem;
  37 import jdk.internal.platform.cgroupv2.CgroupV2Subsystem;
  38 import jdk.internal.platform.cgroupv2.CgroupV2SubsystemController;
  39 
  40 class CgroupSubsystemFactory {
  41 
  42     private static final String CPU_CTRL = "cpu";
  43     private static final String CPUACCT_CTRL = "cpuacct";
  44     private static final String CPUSET_CTRL = "cpuset";
  45     private static final String BLKIO_CTRL = "blkio";
  46     private static final String MEMORY_CTRL = "memory";
  47 
  48     static CgroupSubsystem create() {
  49         Map<String, CgroupInfo> infos = new HashMap<>();
  50         try {
  51             List<String> lines = CgroupUtil.readAllLinesPrivileged(Paths.get("/proc/cgroups"));
  52             for (String line : lines) {
  53                 if (line.startsWith("#")) {
  54                     continue;
  55                 }
  56                 CgroupInfo info = CgroupInfo.fromCgroupsLine(line);
  57                 switch (info.getName()) {
  58                 case CPU_CTRL:      infos.put(CPU_CTRL, info); break;
  59                 case CPUACCT_CTRL:  infos.put(CPUACCT_CTRL, info); break;
  60                 case CPUSET_CTRL:   infos.put(CPUSET_CTRL, info); break;
  61                 case MEMORY_CTRL:   infos.put(MEMORY_CTRL, info); break;
  62                 case BLKIO_CTRL:    infos.put(BLKIO_CTRL, info); break;
  63                 }
  64             }
  65         } catch (IOException e) {
  66             return null;
  67         }
  68 


 107             try {
 108                 List<String> lines = CgroupUtil.readAllLinesPrivileged(Paths.get("/proc/self/cgroup"));
 109                 for (String line: lines) {
 110                     String[] tokens = line.split(":");
 111                     if (tokens.length != 3) {
 112                         return null; // something is not right.
 113                     }
 114                     if (!Integer.valueOf(0).toString().equals(tokens[0])) {
 115                         // hierarchy must be zero for cgroups v2
 116                         return null;
 117                     }
 118                     cgroupPath = tokens[2];
 119                     break;
 120                 }
 121             } catch (IOException e) {
 122                 return null;
 123             }
 124             CgroupSubsystemController unified = new CgroupV2SubsystemController(
 125                     mountPath,
 126                     cgroupPath);
 127             return new CgroupV2Subsystem(unified);
 128         } else {
 129             return CgroupV1Subsystem.getInstance();
 130         }
 131     }
 132 }


  28 import java.io.IOException;
  29 import java.nio.file.Paths;
  30 import java.util.HashMap;
  31 import java.util.List;
  32 import java.util.Map;
  33 import java.util.stream.Collectors;
  34 import java.util.stream.Stream;
  35 
  36 import jdk.internal.platform.cgroupv1.CgroupV1Subsystem;
  37 import jdk.internal.platform.cgroupv2.CgroupV2Subsystem;
  38 import jdk.internal.platform.cgroupv2.CgroupV2SubsystemController;
  39 
  40 class CgroupSubsystemFactory {
  41 
  42     private static final String CPU_CTRL = "cpu";
  43     private static final String CPUACCT_CTRL = "cpuacct";
  44     private static final String CPUSET_CTRL = "cpuset";
  45     private static final String BLKIO_CTRL = "blkio";
  46     private static final String MEMORY_CTRL = "memory";
  47 
  48     static CgroupMetrics create() {
  49         Map<String, CgroupInfo> infos = new HashMap<>();
  50         try {
  51             List<String> lines = CgroupUtil.readAllLinesPrivileged(Paths.get("/proc/cgroups"));
  52             for (String line : lines) {
  53                 if (line.startsWith("#")) {
  54                     continue;
  55                 }
  56                 CgroupInfo info = CgroupInfo.fromCgroupsLine(line);
  57                 switch (info.getName()) {
  58                 case CPU_CTRL:      infos.put(CPU_CTRL, info); break;
  59                 case CPUACCT_CTRL:  infos.put(CPUACCT_CTRL, info); break;
  60                 case CPUSET_CTRL:   infos.put(CPUSET_CTRL, info); break;
  61                 case MEMORY_CTRL:   infos.put(MEMORY_CTRL, info); break;
  62                 case BLKIO_CTRL:    infos.put(BLKIO_CTRL, info); break;
  63                 }
  64             }
  65         } catch (IOException e) {
  66             return null;
  67         }
  68 


 107             try {
 108                 List<String> lines = CgroupUtil.readAllLinesPrivileged(Paths.get("/proc/self/cgroup"));
 109                 for (String line: lines) {
 110                     String[] tokens = line.split(":");
 111                     if (tokens.length != 3) {
 112                         return null; // something is not right.
 113                     }
 114                     if (!Integer.valueOf(0).toString().equals(tokens[0])) {
 115                         // hierarchy must be zero for cgroups v2
 116                         return null;
 117                     }
 118                     cgroupPath = tokens[2];
 119                     break;
 120                 }
 121             } catch (IOException e) {
 122                 return null;
 123             }
 124             CgroupSubsystemController unified = new CgroupV2SubsystemController(
 125                     mountPath,
 126                     cgroupPath);
 127             return new CgroupMetrics(new CgroupV2Subsystem(unified));
 128         } else {
 129             return new CgroupV1Metrics(CgroupV1Subsystem.getInstance());
 130         }
 131     }
 132 }
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