Lines Matching +full:embedded +full:- +full:trace +full:- +full:extension
1 .. SPDX-License-Identifier: GPL-2.0
24 1.1 Process-Specific Subdirectories
36 3 Per-Process Parameters
37 3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj - Adjust the oom-killer
39 3.2 /proc/<pid>/oom_score - Display current oom-killer score
40 3.3 /proc/<pid>/io - Display the IO accounting fields
41 3.4 /proc/<pid>/coredump_filter - Core dump filtering settings
42 3.5 /proc/<pid>/mountinfo - Information about mounts
44 3.7 /proc/<pid>/task/<tid>/children - Information about task children
45 3.8 /proc/<pid>/fdinfo/<fd> - Information about opened file
46 3.9 /proc/<pid>/map_files - Information about memory mapped files
47 3.10 /proc/<pid>/timerslack_ns - Task timerslack value
48 3.11 /proc/<pid>/patch_state - Livepatch patch operation state
49 3.12 /proc/<pid>/arch_status - Task architecture specific information
50 3.13 /proc/<pid>/fd - List of symlinks to open files
61 ------------------------
69 we know, it is the first 'all-in-one' document about the /proc file system. It
72 It also only covers IPv4 networking, not IPv6 nor other protocols - sorry. But
91 mailing list at linux-kernel@vger.kernel.org and/or try to reach me at
95 ---------------
105 ---------------
112 ------------------------------------------------------------------------------
118 First, we'll take a look at the read-only parts of /proc. In Chapter 2, we
121 1.1 Process-Specific Subdirectories
122 -----------------------------------
128 subdirectory has the entries listed in Table 1-1.
138 .. table:: Table 1-1: Process specific entries in /proc
157 symbol the task is blocked in - or "0" if not blocked.
159 stack Report full stack trace, enable via CONFIG_STACKTRACE
160 smaps An extension based on maps, showing the memory consumption of
164 numa_maps An extension based on maps, showing the memory locality and
222 file /proc/PID/status. It fields are described in table 1-2.
225 memory usage. Its seven fields are explained in Table 1-3. The stat file
227 explained in Table 1-4.
236 .. table:: Table 1-2: Contents of the status fields (as of 4.19)
310 .. table:: Table 1-3: Contents of the statm fields (as of 2.6.8-rc3)
328 .. table:: Table 1-4: Contents of the stat fields (as of 2.6.30-rc7)
397 08048000-08049000 r-xp 00000000 03:00 8312 /opt/test
398 08049000-0804a000 rw-p 00001000 03:00 8312 /opt/test
399 0804a000-0806b000 rw-p 00000000 00:00 0 [heap]
400 a7cb1000-a7cb2000 ---p 00000000 00:00 0
401 a7cb2000-a7eb2000 rw-p 00000000 00:00 0
402 a7eb2000-a7eb3000 ---p 00000000 00:00 0
403 a7eb3000-a7ed5000 rw-p 00000000 00:00 0
404 a7ed5000-a8008000 r-xp 00000000 03:00 4222 /lib/libc.so.6
405 a8008000-a800a000 r--p 00133000 03:00 4222 /lib/libc.so.6
406 a800a000-a800b000 rw-p 00135000 03:00 4222 /lib/libc.so.6
407 a800b000-a800e000 rw-p 00000000 00:00 0
408 a800e000-a8022000 r-xp 00000000 03:00 14462 /lib/libpthread.so.0
409 a8022000-a8023000 r--p 00013000 03:00 14462 /lib/libpthread.so.0
410 a8023000-a8024000 rw-p 00014000 03:00 14462 /lib/libpthread.so.0
411 a8024000-a8027000 rw-p 00000000 00:00 0
412 a8027000-a8043000 r-xp 00000000 03:00 8317 /lib/ld-linux.so.2
413 a8043000-a8044000 r--p 0001b000 03:00 8317 /lib/ld-linux.so.2
414 a8044000-a8045000 rw-p 0001c000 03:00 8317 /lib/ld-linux.so.2
415 aff35000-aff4a000 rw-p 00000000 00:00 0 [stack]
416 ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]
446 The /proc/PID/smaps is an extension based on maps, showing the memory
450 08048000-080bc000 r-xp 00000000 03:02 13130 /bin/bash
505 "KSM" reports how many of the pages are KSM pages. Note that KSM-placed zeropages
523 "Swap" shows how much would-be-anonymous memory is also used, but out on swap.
526 replaced by copy-on-write) part of the underlying shmem object out on swap.
572 uw userfaultfd wr-protect tracking
578 be vanished or the reverse -- new added. Interpretation of their meaning
601 - Pss_Anon
602 - Pss_File
603 - Pss_Shmem
613 soft-dirty bit on pte (see Documentation/admin-guide/mm/soft-dirty.rst
627 To clear the soft-dirty bit::
641 Documentation/admin-guide/mm/pagemap.rst.
643 The /proc/pid/numa_maps is an extension based on maps, showing the memory
652 3206000000 default file=/lib64/ld-2.12.so mapped=26 mapmax=6 N0=24 N3=2 kernelpagesize_kB=4
653 320621f000 default file=/lib64/ld-2.12.so anon=1 dirty=1 N3=1 kernelpagesize_kB=4
654 3206220000 default file=/lib64/ld-2.12.so anon=1 dirty=1 N3=1 kernelpagesize_kB=4
656 …3206800000 default file=/lib64/libc-2.12.so mapped=59 mapmax=21 active=55 N0=41 N3=18 kernelpagesi…
657 320698b000 default file=/lib64/libc-2.12.so
658 3206b8a000 default file=/lib64/libc-2.12.so anon=2 dirty=2 N3=2 kernelpagesize_kB=4
659 3206b8e000 default file=/lib64/libc-2.12.so anon=1 dirty=1 N3=1 kernelpagesize_kB=4
671 "policy" reports the NUMA memory policy set for the mapping (see Documentation/admin-guide/mm/numa_…
678 ---------------
682 /proc and are listed in Table 1-5. Not all of these will be present in your
686 .. table:: Table 1-5: Kernel info in /proc
699 cmdline Kernel command line, both from bootloader and embedded
734 pci Deprecated info of PCI bus (new way -> /proc/bus/pci/,
756 0: 8728810 XT-PIC timer
757 1: 895 XT-PIC keyboard
758 2: 0 XT-PIC cascade
759 3: 531695 XT-PIC aha152x
760 4: 2014133 XT-PIC serial
761 5: 44401 XT-PIC pcnet_cs
762 8: 2 XT-PIC rtc
763 11: 8 XT-PIC i82365
764 12: 182918 XT-PIC PS/2 Mouse
765 13: 1 XT-PIC fpu
766 14: 1232265 XT-PIC ide0
767 15: 7 XT-PIC ide1
776 0: 1243498 1214548 IO-APIC-edge timer
777 1: 8949 8958 IO-APIC-edge keyboard
778 2: 0 0 XT-PIC cascade
779 5: 11286 10161 IO-APIC-edge soundblaster
780 8: 1 0 IO-APIC-edge rtc
781 9: 27422 27407 IO-APIC-edge 3c503
782 12: 113645 113873 IO-APIC-edge PS/2 Mouse
783 13: 0 0 XT-PIC fpu
784 14: 22491 24012 IO-APIC-edge ide0
785 15: 2183 2415 IO-APIC-edge ide1
786 17: 30564 30414 IO-APIC-level eth0
787 18: 177 164 IO-APIC-level bttv
797 ERR is incremented in the case of errors in the IO-APIC bus (the bus that
799 the IO-APIC automatically retry the transmission, so it should not be a big
800 problem, but you should read the SMP-FAQ.
865 1024-1031
867 The default_smp_affinity mask applies to all non-active IRQs, which are the
869 /proc/irq/[0-9]* directory.
878 The way IRQs are routed is handled by the IO-APIC, and it's Round Robin
881 best choice for almost everyone. [Note this applies only to those IO-APIC's
939 X86-64. By keeping pages grouped based on their ability to move, the kernel
940 can reclaim pages within a page block to satisfy a high-order allocation.
944 by migrate-type and finishes with details on how many page blocks of each
1049 In-memory cache for files read from the disk (the
1093 Non-file backed pages mapped into userspace page tables
1103 in-kernel data structures cache
1131 CommitLimit = ([total RAM pages] - [total huge TLB pages]) *
1139 in mm/overcommit-accounting.
1174 Non-file backed huge pages mapped into userspace page tables
1190 See Documentation/admin-guide/mm/hugetlbpage.rst.
1218 0xffffc20000000000-0xffffc20000201000 2101248 alloc_large_system_hash+0x204 ...
1220 0xffffc20000201000-0xffffc20000302000 1052672 alloc_large_system_hash+0x204 ...
1222 0xffffc20000302000-0xffffc20000304000 8192 acpi_tb_verify_table+0x21/0x4f...
1224 0xffffc20000304000-0xffffc20000307000 12288 acpi_tb_verify_table+0x21/0x4f...
1226 0xffffc2000031d000-0xffffc2000031f000 8192 init_vdso_vars+0x112/0x210
1227 0xffffc2000031f000-0xffffc2000032b000 49152 cramfs_uncompress_init+0x2e ...
1229 0xffffc2000033a000-0xffffc2000033d000 12288 sys_swapon+0x640/0xac0 ...
1231 0xffffc20000347000-0xffffc2000034c000 20480 xt_alloc_table_info+0xfe ...
1233 0xffffffffa0000000-0xffffffffa000f000 61440 sys_init_module+0xc27/0x1d00 ...
1235 0xffffffffa000f000-0xffffffffa0014000 20480 sys_init_module+0xc27/0x1d00 ...
1237 0xffffffffa0014000-0xffffffffa0017000 12288 sys_init_module+0xc27/0x1d00 ...
1239 0xffffffffa0017000-0xffffffffa0022000 45056 sys_init_module+0xc27/0x1d00 ...
1263 --------------------------------
1265 The subdirectory /proc/net follows the usual pattern. Table 1-8 shows the
1267 support this. Table 1-9 lists the files and their meaning.
1270 .. table:: Table 1-8: IPv6 info in /proc/net
1286 .. table:: Table 1-9: Network info in /proc/net
1308 softnet_stat Per-CPU incoming packets queues statistics of online CPUs
1324 Inter-|Receive |[...
1343 -------------
1353 Type: Direct-Access ANSI SCSI revision: 03
1355 Vendor: PIONEER Model: CD-ROM DR-U06S Rev: 1.04
1356 Type: CD-ROM ANSI SCSI revision: 02
1363 AHA-2940 SCSI adapter::
1373 SCSI Adapter: Adaptec AHA-294X Ultra SCSI host adapter
1406 ---------------------------------------
1412 These directories contain the four files shown in Table 1-10.
1415 .. table:: Table 1-10: Files in /proc/parport
1420 autoprobe Any IEEE-1284 device ID information that has been acquired.
1431 -------------------------
1435 this directory, as shown in Table 1-11.
1438 .. table:: Table 1-11: Files in /proc/tty
1452 pty_slave /dev/pts 136 0-255 pty:slave
1453 pty_master /dev/ptm 128 0-255 pty:master
1454 pty_slave /dev/ttyp 3 0-255 pty:slave
1455 pty_master /dev/pty 2 0-255 pty:master
1456 serial /dev/cua 5 64-67 serial:callout
1457 serial /dev/ttyS 4 64-67 serial
1462 unknown /dev/tty 4 1-63 console
1466 -------------------------------------------------
1491 - user: normal processes executing in user mode
1492 - nice: niced processes executing in user mode
1493 - system: processes executing in kernel mode
1494 - idle: twiddling thumbs
1495 - iowait: In a word, iowait stands for waiting for I/O to complete. But there
1501 2. In a multi-core CPU, the task waiting for I/O to complete is not running
1507 - irq: servicing interrupts
1508 - softirq: servicing softirqs
1509 - steal: involuntary wait
1510 - guest: running a normal guest
1511 - guest_nice: running a niced guest
1541 -------------------------------
1546 /proc/fs/ext4/sda9 or /proc/fs/ext4/dm-0). The files in each per-device
1547 directory are shown in Table 1-12, below.
1549 .. table:: Table 1-12: Files in /proc/fs/ext4/<devname>
1557 -------------------
1564 tty0 -WU (ECp) 4:7
1565 ttyS0 -W- (Ep) 4:64
1569 +--------------------+-------------------------------------------------------+
1575 +--------------------+-------------------------------------------------------+
1582 +--------------------+-------------------------------------------------------+
1585 +--------------------+-------------------------------------------------------+
1588 -------
1601 ---------------
1607 ------------------------------------------------------------------------------
1631 Please see: Documentation/admin-guide/sysctl/ directory for descriptions of
1635 -------
1644 Chapter 3: Per-process Parameters
1647 3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj- Adjust the oom-killer score
1648 --------------------------------------------------------------------------------
1670 is used to determine which task to kill. Acceptable values range from -1000
1673 task or completely disabling it. The lowest possible value, -1000, is
1681 50% more memory. A value of -500, on the other hand, would be roughly
1686 be used to tune the badness score. Its acceptable values range from -16
1687 (OOM_ADJUST_MIN) to +15 (OOM_ADJUST_MAX) and a special value of -17
1696 3.2 /proc/<pid>/oom_score - Display current oom-killer score
1697 -------------------------------------------------------------
1699 This file can be used to check the current score used by the oom-killer for
1701 process should be killed in an out-of-memory situation.
1707 3.3 /proc/<pid>/io - Display the IO accounting fields
1708 -------------------------------------------------------
1774 accurate for block-backed filesystems. <please add status regarding NFS and
1783 the storage layer. This is done at page-dirtying time.
1802 At its current implementation state, this is a bit racy on 32-bit machines:
1804 of those 64-bit counters, process A could see an intermediate result.
1810 3.4 /proc/<pid>/coredump_filter - Core dump filtering settings
1811 ---------------------------------------------------------------
1815 Conversely, sometimes we want to save file-backed memory segments into a core
1825 - (bit 0) anonymous private memory
1826 - (bit 1) anonymous shared memory
1827 - (bit 2) file-backed private memory
1828 - (bit 3) file-backed shared memory
1829 - (bit 4) ELF header pages in file-backed private memory areas (it is
1831 - (bit 5) hugetlb private memory
1832 - (bit 6) hugetlb shared memory
1833 - (bit 7) DAX private memory
1834 - (bit 8) DAX shared memory
1839 Note that bits 0-4 don't affect hugetlb or DAX memory. hugetlb memory is
1840 only affected by bit 5-6, and DAX is only affected by bits 7-8.
1857 3.5 /proc/<pid>/mountinfo - Information about mounts
1858 --------------------------------------------------------
1862 36 35 98:0 /mnt1 /mnt2 rw,noatime master:1 - ext3 /dev/root rw,errors=continue
1898 --------------------------------------------------------
1906 3.7 /proc/<pid>/task/<tid>/children - Information about task children
1907 -------------------------------------------------------------------------
1912 Note the "first level" here -- if a child has its own children they will
1913 not be listed here; one needs to read /proc/<children-pid>/task/<tid>/children
1923 3.8 /proc/<pid>/fdinfo/<fd> - Information about opened file
1924 ---------------------------------------------------------------
1926 files have at least four fields -- 'pos', 'flags', 'mnt_id' and 'ino'.
1957 eventfd-count: 5a
1959 where 'eventfd-count' is hex value of a counter.
2002 …inotify wd:3 ino:9e7e sdev:800013 mask:800afce ignored_mask:0 fhandle-bytes:8 fhandle-type:1 f_han…
2011 fields 'fhandle-bytes', 'fhandle-type' and 'f_handle', all in hex
2025 fanotify flags:10 event-flags:0
2027 …fanotify ino:4f969 sdev:800013 mflags:0 mask:3b ignored_mask:40000000 fhandle-bytes:8 fhandle-type…
2029 where fanotify 'flags' and 'event-flags' are values used in fanotify_init
2075 exp_name: system-heap
2080 3.9 /proc/<pid>/map_files - Information about memory mapped files
2081 ---------------------------------------------------------------------
2085 | lr-------- 1 root root 64 Jan 27 11:24 333c600000-333c620000 -> /usr/lib64/ld-2.18.so
2086 | lr-------- 1 root root 64 Jan 27 11:24 333c81f000-333c820000 -> /usr/lib64/ld-2.18.so
2087 | lr-------- 1 root root 64 Jan 27 11:24 333c820000-333c821000 -> /usr/lib64/ld-2.18.so
2089 | lr-------- 1 root root 64 Jan 27 11:24 35d0421000-35d0422000 -> /usr/lib64/libselinux.so.1
2090 | lr-------- 1 root root 64 Jan 27 11:24 400000-41a000 -> /usr/bin/ls
2093 vm_area_struct::vm_start-vm_area_struct::vm_end.
2102 3.10 /proc/<pid>/timerslack_ns - Task timerslack value
2103 ---------------------------------------------------------
2113 Valid values are from 0 - ULLONG_MAX
2118 3.11 /proc/<pid>/patch_state - Livepatch patch operation state
2119 -----------------------------------------------------------------
2123 A value of '-1' indicates that no patch is in transition.
2135 3.12 /proc/<pid>/arch_status - task architecture specific status
2136 -------------------------------------------------------------------
2176 A special value of '-1' indicates that no AVX512 usage was recorded, thus
2180 3.13 /proc/<pid>/fd - List of symlinks to open files
2181 -------------------------------------------------------
2185 lr-x------ 1 root root 64 Sep 20 17:53 0 -> /dev/null
2186 l-wx------ 1 root root 64 Sep 20 17:53 1 -> /dev/null
2187 lrwx------ 1 root root 64 Sep 20 17:53 10 -> 'socket:[12539]'
2188 lrwx------ 1 root root 64 Sep 20 17:53 11 -> 'socket:[12540]'
2189 lrwx------ 1 root root 64 Sep 20 17:53 12 -> 'socket:[12542]'
2193 -------------------------------------------------------
2200 ---------------------
2210 hidepid=off or hidepid=0 means classic mode - everybody may access all
2224 by "kill -0 $PID"), but it hides process' uid and gid, which may be learned by
2253 # strace -e mount mount -o hidepid=1 -t proc proc /tmp/proc
2264 # mount -o remount,hidepid=1 -t proc proc /tmp/proc
2277 # mount -o hidepid=invisible -t proc proc /proc
2278 # mount -o hidepid=noaccess -t proc proc /tmp/proc