Lines Matching +full:locality +full:- +full:specific
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
51 3.14 /proc/<pid/ksm_stat - Information about the process's ksm status.
62 ------------------------
70 we know, it is the first 'all-in-one' document about the /proc file system. It
73 It also only covers IPv4 networking, not IPv6 nor other protocols - sorry. But
92 mailing list at linux-kernel@vger.kernel.org and/or try to reach me at
96 ---------------
106 ---------------
113 ------------------------------------------------------------------------------
119 First, we'll take a look at the read-only parts of /proc. In Chapter 2, we
122 1.1 Process-Specific Subdirectories
123 -----------------------------------
129 subdirectory has the entries listed in Table 1-1.
135 capability. This applies to all read-only information like `maps`, `environ`,
136 `pagemap`, etc. The only exception is `mem` file due to its read-write nature,
149 .. table:: Table 1-1: Process specific entries in /proc
168 symbol the task is blocked in - or "0" if not blocked.
175 numa_maps An extension based on maps, showing the memory locality and
233 file /proc/PID/status. It fields are described in table 1-2.
236 memory usage. Its seven fields are explained in Table 1-3. The stat file
238 explained in Table 1-4.
247 .. table:: Table 1-2: Contents of the status fields (as of 4.19)
321 .. table:: Table 1-3: Contents of the statm fields (as of 2.6.8-rc3)
339 .. table:: Table 1-4: Contents of the stat fields (as of 2.6.30-rc7)
408 08048000-08049000 r-xp 00000000 03:00 8312 /opt/test
409 08049000-0804a000 rw-p 00001000 03:00 8312 /opt/test
410 0804a000-0806b000 rw-p 00000000 00:00 0 [heap]
411 a7cb1000-a7cb2000 ---p 00000000 00:00 0
412 a7cb2000-a7eb2000 rw-p 00000000 00:00 0
413 a7eb2000-a7eb3000 ---p 00000000 00:00 0
414 a7eb3000-a7ed5000 rw-p 00000000 00:00 0
415 a7ed5000-a8008000 r-xp 00000000 03:00 4222 /lib/libc.so.6
416 a8008000-a800a000 r--p 00133000 03:00 4222 /lib/libc.so.6
417 a800a000-a800b000 rw-p 00135000 03:00 4222 /lib/libc.so.6
418 a800b000-a800e000 rw-p 00000000 00:00 0
419 a800e000-a8022000 r-xp 00000000 03:00 14462 /lib/libpthread.so.0
420 a8022000-a8023000 r--p 00013000 03:00 14462 /lib/libpthread.so.0
421 a8023000-a8024000 rw-p 00014000 03:00 14462 /lib/libpthread.so.0
422 a8024000-a8027000 rw-p 00000000 00:00 0
423 a8027000-a8043000 r-xp 00000000 03:00 8317 /lib/ld-linux.so.2
424 a8043000-a8044000 r--p 0001b000 03:00 8317 /lib/ld-linux.so.2
425 a8044000-a8045000 rw-p 0001c000 03:00 8317 /lib/ld-linux.so.2
426 aff35000-aff4a000 rw-p 00000000 00:00 0 [stack]
427 ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]
458 ioctl()-based API that gives ability to flexibly and efficiently query and
470 08048000-080bc000 r-xp 00000000 03:02 13130 /bin/bash
542 "KSM" reports how many of the pages are KSM pages. Note that KSM-placed zeropages
560 "Swap" shows how much would-be-anonymous memory is also used, but out on swap.
563 replaced by copy-on-write) part of the underlying shmem object out on swap.
598 ar architecture specific flag
609 uw userfaultfd wr-protect tracking
616 be vanished or the reverse -- new added. Interpretation of their meaning
618 follow each specific kernel version for the exact semantic.
639 - Pss_Anon
640 - Pss_File
641 - Pss_Shmem
651 soft-dirty bit on pte (see Documentation/admin-guide/mm/soft-dirty.rst
665 To clear the soft-dirty bit::
679 Documentation/admin-guide/mm/pagemap.rst.
682 locality and binding policy, as well as the memory usage (in pages) of
690 3206000000 default file=/lib64/ld-2.12.so mapped=26 mapmax=6 N0=24 N3=2 kernelpagesize_kB=4
691 320621f000 default file=/lib64/ld-2.12.so anon=1 dirty=1 N3=1 kernelpagesize_kB=4
692 3206220000 default file=/lib64/ld-2.12.so anon=1 dirty=1 N3=1 kernelpagesize_kB=4
694 …3206800000 default file=/lib64/libc-2.12.so mapped=59 mapmax=21 active=55 N0=41 N3=18 kernelpagesi…
695 320698b000 default file=/lib64/libc-2.12.so
696 3206b8a000 default file=/lib64/libc-2.12.so anon=2 dirty=2 N3=2 kernelpagesize_kB=4
697 3206b8e000 default file=/lib64/libc-2.12.so anon=1 dirty=1 N3=1 kernelpagesize_kB=4
709 "policy" reports the NUMA memory policy set for the mapping (see Documentation/admin-guide/mm/numa_…
712 node locality page counters (N0 == node0, N1 == node1, ...) and the kernel page
721 ---------------
725 /proc and are listed in Table 1-5. Not all of these will be present in your
729 .. table:: Table 1-5: Kernel info in /proc
742 bus Directory containing bus specific information
778 pci Deprecated info of PCI bus (new way -> /proc/bus/pci/,
800 0: 8728810 XT-PIC timer
801 1: 895 XT-PIC keyboard
802 2: 0 XT-PIC cascade
803 3: 531695 XT-PIC aha152x
804 4: 2014133 XT-PIC serial
805 5: 44401 XT-PIC pcnet_cs
806 8: 2 XT-PIC rtc
807 11: 8 XT-PIC i82365
808 12: 182918 XT-PIC PS/2 Mouse
809 13: 1 XT-PIC fpu
810 14: 1232265 XT-PIC ide0
811 15: 7 XT-PIC ide1
820 0: 1243498 1214548 IO-APIC-edge timer
821 1: 8949 8958 IO-APIC-edge keyboard
822 2: 0 0 XT-PIC cascade
823 5: 11286 10161 IO-APIC-edge soundblaster
824 8: 1 0 IO-APIC-edge rtc
825 9: 27422 27407 IO-APIC-edge 3c503
826 12: 113645 113873 IO-APIC-edge PS/2 Mouse
827 13: 0 0 XT-PIC fpu
828 14: 22491 24012 IO-APIC-edge ide0
829 15: 2183 2415 IO-APIC-edge ide1
830 17: 30564 30414 IO-APIC-level eth0
831 18: 177 164 IO-APIC-level bttv
841 ERR is incremented in the case of errors in the IO-APIC bus (the bus that
843 the IO-APIC automatically retry the transmission, so it should not be a big
844 problem, but you should read the SMP-FAQ.
909 1024-1031
911 The default_smp_affinity mask applies to all non-active IRQs, which are the
913 /proc/irq/[0-9]* directory.
916 reports itself as being attached. This hardware locality information does not
917 include information about any possible driver locality preference.
922 The way IRQs are routed is handled by the IO-APIC, and it's Round Robin
925 best choice for almost everyone. [Note this applies only to those IO-APIC's
983 X86-64. By keeping pages grouped based on their ability to move, the kernel
984 can reclaim pages within a page block to satisfy a high-order allocation.
988 by migrate-type and finishes with details on how many page blocks of each
1014 > tail -n +3 /proc/allocinfo | sort -rn
1019 13377536 234 block/blk-mq.c:3421 func:blk_mq_alloc_rqs
1037 additional memory using subsystem specific interfaces, for instance
1124 In-memory cache for files read from the disk (the
1168 Non-file backed pages mapped into userspace page tables. Note that
1184 in-kernel data structures cache
1212 CommitLimit = ([total RAM pages] - [total huge TLB pages]) *
1220 in mm/overcommit-accounting.
1255 Non-file backed huge pages mapped into userspace page tables
1275 See Documentation/admin-guide/mm/hugetlbpage.rst.
1303 0xffffc20000000000-0xffffc20000201000 2101248 alloc_large_system_hash+0x204 ...
1305 0xffffc20000201000-0xffffc20000302000 1052672 alloc_large_system_hash+0x204 ...
1307 0xffffc20000302000-0xffffc20000304000 8192 acpi_tb_verify_table+0x21/0x4f...
1309 0xffffc20000304000-0xffffc20000307000 12288 acpi_tb_verify_table+0x21/0x4f...
1311 0xffffc2000031d000-0xffffc2000031f000 8192 init_vdso_vars+0x112/0x210
1312 0xffffc2000031f000-0xffffc2000032b000 49152 cramfs_uncompress_init+0x2e ...
1314 0xffffc2000033a000-0xffffc2000033d000 12288 sys_swapon+0x640/0xac0 ...
1316 0xffffc20000347000-0xffffc2000034c000 20480 xt_alloc_table_info+0xfe ...
1318 0xffffffffa0000000-0xffffffffa000f000 61440 sys_init_module+0xc27/0x1d00 ...
1320 0xffffffffa000f000-0xffffffffa0014000 20480 sys_init_module+0xc27/0x1d00 ...
1322 0xffffffffa0014000-0xffffffffa0017000 12288 sys_init_module+0xc27/0x1d00 ...
1324 0xffffffffa0017000-0xffffffffa0022000 45056 sys_init_module+0xc27/0x1d00 ...
1348 --------------------------------
1350 The subdirectory /proc/net follows the usual pattern. Table 1-8 shows the
1352 support this. Table 1-9 lists the files and their meaning.
1355 .. table:: Table 1-8: IPv6 info in /proc/net
1371 .. table:: Table 1-9: Network info in /proc/net
1393 softnet_stat Per-CPU incoming packets queues statistics of online CPUs
1409 Inter-|Receive |[...
1423 It will contain information that is specific to that bond, such as the
1428 -------------
1438 Type: Direct-Access ANSI SCSI revision: 03
1440 Vendor: PIONEER Model: CD-ROM DR-U06S Rev: 1.04
1441 Type: CD-ROM ANSI SCSI revision: 02
1448 AHA-2940 SCSI adapter::
1458 SCSI Adapter: Adaptec AHA-294X Ultra SCSI host adapter
1491 ---------------------------------------
1497 These directories contain the four files shown in Table 1-10.
1500 .. table:: Table 1-10: Files in /proc/parport
1505 autoprobe Any IEEE-1284 device ID information that has been acquired.
1516 -------------------------
1520 this directory, as shown in Table 1-11.
1523 .. table:: Table 1-11: Files in /proc/tty
1537 pty_slave /dev/pts 136 0-255 pty:slave
1538 pty_master /dev/ptm 128 0-255 pty:master
1539 pty_slave /dev/ttyp 3 0-255 pty:slave
1540 pty_master /dev/pty 2 0-255 pty:master
1541 serial /dev/cua 5 64-67 serial:callout
1542 serial /dev/ttyS 4 64-67 serial
1547 unknown /dev/tty 4 1-63 console
1551 -------------------------------------------------
1576 - user: normal processes executing in user mode
1577 - nice: niced processes executing in user mode
1578 - system: processes executing in kernel mode
1579 - idle: twiddling thumbs
1580 - iowait: In a word, iowait stands for waiting for I/O to complete. But there
1586 2. In a multi-core CPU, the task waiting for I/O to complete is not running
1592 - irq: servicing interrupts
1593 - softirq: servicing softirqs
1594 - steal: involuntary wait
1595 - guest: running a normal guest
1596 - guest_nice: running a niced guest
1600 interrupts serviced including unnumbered architecture specific interrupts;
1626 -------------------------------
1631 /proc/fs/ext4/sda9 or /proc/fs/ext4/dm-0). The files in each per-device
1632 directory are shown in Table 1-12, below.
1634 .. table:: Table 1-12: Files in /proc/fs/ext4/<devname>
1642 -------------------
1649 tty0 -WU (ECp) 4:7
1650 ttyS0 -W- (Ep) 4:64
1654 +--------------------+-------------------------------------------------------+
1660 +--------------------+-------------------------------------------------------+
1667 +--------------------+-------------------------------------------------------+
1670 +--------------------+-------------------------------------------------------+
1673 -------
1680 it easy, if not obvious, where to look for specific data.
1686 ---------------
1692 ------------------------------------------------------------------------------
1716 Please see: Documentation/admin-guide/sysctl/ directory for descriptions of
1720 -------
1729 Chapter 3: Per-process Parameters
1732 3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj- Adjust the oom-killer score
1733 --------------------------------------------------------------------------------
1755 is used to determine which task to kill. Acceptable values range from -1000
1758 task or completely disabling it. The lowest possible value, -1000, is
1766 50% more memory. A value of -500, on the other hand, would be roughly
1771 be used to tune the badness score. Its acceptable values range from -16
1772 (OOM_ADJUST_MIN) to +15 (OOM_ADJUST_MAX) and a special value of -17
1781 3.2 /proc/<pid>/oom_score - Display current oom-killer score
1782 -------------------------------------------------------------
1784 This file can be used to check the current score used by the oom-killer for
1786 process should be killed in an out-of-memory situation.
1792 3.3 /proc/<pid>/io - Display the IO accounting fields
1793 -------------------------------------------------------
1859 accurate for block-backed filesystems. <please add status regarding NFS and
1868 the storage layer. This is done at page-dirtying time.
1887 At its current implementation state, this is a bit racy on 32-bit machines:
1889 of those 64-bit counters, process A could see an intermediate result.
1895 3.4 /proc/<pid>/coredump_filter - Core dump filtering settings
1896 ---------------------------------------------------------------
1900 Conversely, sometimes we want to save file-backed memory segments into a core
1910 - (bit 0) anonymous private memory
1911 - (bit 1) anonymous shared memory
1912 - (bit 2) file-backed private memory
1913 - (bit 3) file-backed shared memory
1914 - (bit 4) ELF header pages in file-backed private memory areas (it is
1916 - (bit 5) hugetlb private memory
1917 - (bit 6) hugetlb shared memory
1918 - (bit 7) DAX private memory
1919 - (bit 8) DAX shared memory
1924 Note that bits 0-4 don't affect hugetlb or DAX memory. hugetlb memory is
1925 only affected by bit 5-6, and DAX is only affected by bits 7-8.
1942 3.5 /proc/<pid>/mountinfo - Information about mounts
1943 --------------------------------------------------------
1947 36 35 98:0 /mnt1 /mnt2 rw,noatime master:1 - ext3 /dev/root rw,errors=continue
1959 (m+3) mount source: filesystem specific information or "none"
1983 --------------------------------------------------------
1991 3.7 /proc/<pid>/task/<tid>/children - Information about task children
1992 -------------------------------------------------------------------------
1997 Note the "first level" here -- if a child has its own children they will
1998 not be listed here; one needs to read /proc/<children-pid>/task/<tid>/children
2008 3.8 /proc/<pid>/fdinfo/<fd> - Information about opened file
2009 ---------------------------------------------------------------
2011 files have at least four fields -- 'pos', 'flags', 'mnt_id' and 'ino'.
2042 eventfd-count: 5a
2044 where 'eventfd-count' is hex value of a counter.
2087 …inotify wd:3 ino:9e7e sdev:800013 mask:800afce ignored_mask:0 fhandle-bytes:8 fhandle-type:1 f_han…
2096 fields 'fhandle-bytes', 'fhandle-type' and 'f_handle', all in hex
2110 fanotify flags:10 event-flags:0
2112 …fanotify ino:4f969 sdev:800013 mflags:0 mask:3b ignored_mask:40000000 fhandle-bytes:8 fhandle-type…
2114 where fanotify 'flags' and 'event-flags' are values used in fanotify_init
2160 exp_name: system-heap
2165 3.9 /proc/<pid>/map_files - Information about memory mapped files
2166 ---------------------------------------------------------------------
2170 | lr-------- 1 root root 64 Jan 27 11:24 333c600000-333c620000 -> /usr/lib64/ld-2.18.so
2171 | lr-------- 1 root root 64 Jan 27 11:24 333c81f000-333c820000 -> /usr/lib64/ld-2.18.so
2172 | lr-------- 1 root root 64 Jan 27 11:24 333c820000-333c821000 -> /usr/lib64/ld-2.18.so
2174 | lr-------- 1 root root 64 Jan 27 11:24 35d0421000-35d0422000 -> /usr/lib64/libselinux.so.1
2175 | lr-------- 1 root root 64 Jan 27 11:24 400000-41a000 -> /usr/bin/ls
2178 vm_area_struct::vm_start-vm_area_struct::vm_end.
2187 3.10 /proc/<pid>/timerslack_ns - Task timerslack value
2188 ---------------------------------------------------------
2198 Valid values are from 0 - ULLONG_MAX
2203 3.11 /proc/<pid>/patch_state - Livepatch patch operation state
2204 -----------------------------------------------------------------
2208 A value of '-1' indicates that no patch is in transition.
2220 3.12 /proc/<pid>/arch_status - task architecture specific status
2221 -------------------------------------------------------------------
2223 architecture specific status of the task.
2236 x86 specific entries
2261 A special value of '-1' indicates that no AVX512 usage was recorded, thus
2265 3.13 /proc/<pid>/fd - List of symlinks to open files
2266 -------------------------------------------------------
2270 lr-x------ 1 root root 64 Sep 20 17:53 0 -> /dev/null
2271 l-wx------ 1 root root 64 Sep 20 17:53 1 -> /dev/null
2272 lrwx------ 1 root root 64 Sep 20 17:53 10 -> 'socket:[12539]'
2273 lrwx------ 1 root root 64 Sep 20 17:53 11 -> 'socket:[12540]'
2274 lrwx------ 1 root root 64 Sep 20 17:53 12 -> 'socket:[12542]'
2278 -------------------------------------------------------
2280 3.14 /proc/<pid/ksm_stat - Information about the process's ksm status
2281 ---------------------------------------------------------------------
2306 addresses. KSM will generate a ksm_rmap_item for each ksm-scanned page of
2346 Documentation/admin-guide/mm/ksm.rst.
2353 ---------------------
2363 hidepid=off or hidepid=0 means classic mode - everybody may access all
2369 user runs specific program (given the program doesn't reveal itself by its
2376 process with a specific pid value exists (it can be learned by other means, e.g.
2377 by "kill -0 $PID"), but it hides process's uid and gid, which may be learned by
2406 # strace -e mount mount -o hidepid=1 -t proc proc /tmp/proc
2417 # mount -o remount,hidepid=1 -t proc proc /tmp/proc
2430 # mount -o hidepid=invisible -t proc proc /proc
2431 # mount -o hidepid=noaccess -t proc proc /tmp/proc