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Type:
Bug
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Resolution: Done
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Priority:
Minor - P4
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Affects Version/s: 3.1.7
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Component/s: Portability
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Fully Compatible
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ALL
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Platforms 10 (02/19/16)
src/mongo/util/processinfo_linux.cpp counts the number of cores on a system by looking at /proc/cpuinfo, the format of which is architecture-dependent. On s390x, it looks like this:
$ cat /proc/cpuinfo vendor_id : IBM/S390 # processors : 8 bogomips per cpu: 18115.00 features : esan3 zarch stfle msa ldisp eimm dfp etf3eh highgprs cache0 : level=1 type=Data scope=Private size=96K line_size=256 associativity=6 cache1 : level=1 type=Instruction scope=Private size=64K line_size=256 associativity=4 cache2 : level=2 type=Data scope=Private size=1024K line_size=256 associativity=8 cache3 : level=2 type=Instruction scope=Private size=1024K line_size=256 associativity=8 cache4 : level=3 type=Unified scope=Shared size=49152K line_size=256 associativity=12 cache5 : level=4 type=Unified scope=Shared size=393216K line_size=256 associativity=24 processor 0: version = FF, identification = 09E977, machine = 2827 processor 1: version = FF, identification = 09E977, machine = 2827 processor 2: version = FF, identification = 09E977, machine = 2827 processor 3: version = FF, identification = 09E977, machine = 2827 processor 4: version = FF, identification = 09E977, machine = 2827 processor 5: version = FF, identification = 09E977, machine = 2827 processor 6: version = FF, identification = 09E977, machine = 2827 processor 7: version = FF, identification = 09E977, machine = 2827
Currently the code cannot parse this, and the number of cores remain zero, causing jstests/core/hostinfo.js to fail.