The first execution of the "task_struct" structure from the crash prompt to dump its members heavily consumes memory and time.

Solution In Progress - Updated -

Issue

  • The first execution of the task_struct structure from the crash prompt to dump its members heavily consumes memory and time.
# echo "exit" | time -v crash -s
        Command being timed: "crash -s"
        User time (seconds): 24.84
        System time (seconds): 0.73
        Percent of CPU this job got: 100%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:25.49
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 406120
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 38839
        Voluntary context switches: 539
        Involuntary context switches: 72
        Swaps: 0
        File system inputs: 0
        File system outputs: 280
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 0

# echo "task_struct" | time -v crash -s
----------8<----------8<----------8<---
Command exited with non-zero status 1
        Command being timed: "crash -s"
        User time (seconds): 48.98                            <<<---
        System time (seconds): 1.93
        Percent of CPU this job got: 99%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:51.11  <<<---
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 1841420           <<<--- 
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 415185
        Voluntary context switches: 553
        Involuntary context switches: 241
        Swaps: 0
        File system inputs: 0
        File system outputs: 296
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 1

Environment

  • Red Hat Enterprise Linux release 9.0 (Plow)
  • crash

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