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→Proposed solution: + few missing fields to TASK_DIAG_BASE
* Ability to specify a set of processes to get info about
* Ability to specify a set of processes to get info about
{| class="wikitable"
|| TASK_DIAG_DUMP_ALL || dump all processes
|-
|| TASK_DIAG_DUMP_ALL_THREAD || dump all threads
|-
|| TASK_DIAG_DUMP_CHILDREN || dump children of a specified task
|-
|| TASK_DIAG_DUMP_THREAD || dump threads of a specified task
|-
|| TASK_DIAG_DUMP_ONE || Dump one task
|}
* Optimal grouping of attributes
* Optimal grouping of attributes
The following groups are proposed:
The following groups are proposed:
{| class="wikitable"
|| TASK_DIAG_BASE || PID, PPID, PGID, SID, TID, state, comm
|-
|| TASK_DIAG_CRED || UID, GID, groups, capabilities
|-
|| TASK_DIAG_STAT || per-task and per-process statistics (same as taskstats, not avail in /proc)
|-
|| TASK_DIAG_VMA || mapped memory regions and their access permissions (same as maps)
|-
|| TASK_DIAG_VMA_STAT || memory consumption for each mapping (same as smaps)
|-
|}
=== Performance measurements ===
=== Performance measurements ===
==== Get pid, tid, pgid and comm for 50000 processes ====
==== ps (emulation) ====
Get pid, tid, pgid and comm for 50000 processes. The code used is available [https://github.com/avagin/linux-task-diag/tree/task-diag-proc/tools/testing/selftests/task_diag from here].
Existing interface:
Existing interface: