A JVM that executed OperatingSystemImpl.getProcessCpuLoad() before checkpoint can fail with assertion failure after restore with:
java: /home/rvansa/work/zulu/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c:291: get_cpuload_internal: Assertion `pticks->usedKernel >= tmp.usedKernel' failed.

The stack trace is
#6 0x0000714b79a3b517 in __assert_fail (assertion=assertion@entry=0x714b79c174e0 "pticks->usedKernel >= tmp.usedKernel",
    file=file@entry=0x714b79c17480 "/home/rvansa/work/zulu/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c", line=line@entry=291,
    function=function@entry=0x714b79c17850 "get_cpuload_internal") at ./assert/assert.c:105
#7 0x0000714b79c1627d in get_cpuload_internal (which=which@entry=-1, pkernelLoad=pkernelLoad@entry=0x714b404fdb18, target=target@entry=CPU_LOAD_VM_ONLY)
    at /home/rvansa/work/zulu/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c:291
#8 0x0000714b79c1642d in get_process_load () at /home/rvansa/work/zulu/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c:329
#9 Java_com_sun_management_internal_OperatingSystemImpl_getProcessCpuLoad0 (env=<optimized out>, dummy=<optimized out>)
    at /home/rvansa/work/zulu/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c:372

This is an assertion failure, therefore failing only in debug builds, and providing probably a non-sense value in release builds. We should remove the assertion and return a negative value (documented as value for ‘unavailable’) if this is detected.