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/linux/tools/perf/tests/shell/
H A Dtrace_summary.sh3 # SPDX-License-Identifier: GPL-2.0
11 [ "$(id -u)" = 0 ] || exit 2
18 search="^\s*(open|read|close).*[0-9]+%$"
20 echo "testing: perf trace ${args} -- ${workload}"
21 perf trace ${args} -- ${workload} >${OUTPUT} 2>&1
22 if [ $? -ne 0 ]; then
25 rm -f ${OUTPUT}
29 count=$(grep -E -c -m 3 "${search}" ${OUTPUT})
33 rm -f ${OUTPUT}
39 test_perf_trace "-s"
[all …]
H A Dstat+json_output.sh3 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
7 set -e
19 rm -f "${stat_output}"
21 trap - EXIT TERM INT
33 [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
38 echo -n "Checking json output: no args "
39 perf stat -j -o "${stat_output}" true
40 $PYTHON $pythonchecker --no-args --file "${stat_output}"
46 echo -n "Checking json output: system wide "
52 perf stat -j -a -o "${stat_output}" true
[all …]
H A Drecord_lbr.sh3 # SPDX-License-Identifier: GPL-2.0
5 set -e
8 [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
11 if [ ! -f /sys/bus/event_source/devices/cpu/caps/branches ] &&
12 [ ! -f /sys/bus/event_source/devices/cpu_core/caps/branches ]
22 rm -rf "${perfdata}"
23 rm -rf "${perfdata}".old
24 rm -rf "${perfdata}".txt
26 trap - EXIT TERM INT
41 if ! perf record -e cycles --call-graph lbr -o "${perfdata}" perf test -w thloop
[all …]
H A Damd-ibs-swfilt.sh5 [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
11 if [ ! -d /sys/bus/event_source/devices/ibs_op ]; then
17 if [ ! -f /sys/bus/event_source/devices/ibs_op/format/swfilt ]; then
26 perf record -B -e ibs_op//u -o /dev/null true 2> /dev/null
27 if [ $? -eq 0 ]; then
33 perf record -B -e ibs_op/swfilt/u -o /dev/null true
34 if [ $? -ne 0 ]; then
42 perf record -B -e ibs_op/swfilt=1/k -o /dev/null true
43 if [ $? -ne 0 ]; then
53 perf record -B -e ibs_fetch/swfilt/u -o /dev/null true
[all …]
H A Dtest_arm_coresight.sh9 # SPDX-License-Identifier: GPL-2.0
15 perf list pmu | grep -q 'cs_etm//' && return 0
28 rm -f ${perfdata}
29 rm -f ${file}
30 rm -f "${perfdata}.old"
31 trap - EXIT TERM INT
39 rm -f $file
40 perf record -o ${perfdata} -e cs_etm/@$1/u --per-thread \
41 -- taskset -c $2 touch $file > /dev/null 2>&1
48 …512 1 branches:u: ffffb220824c strcmp+0xc (/lib/aarch64-linux-gnu/ld-2.27.so)
[all …]
H A Drecord.sh3 # SPDX-License-Identifier: GPL-2.0
5 set -e
23 testprog="perf test -w thloop"
29 default_fd_limit=$(ulimit -Sn)
30 # With option --threads=cpu the number of open file descriptors should be
39 rm -f "${perfdata}"
40 rm -f "${perfdata}".old
41 rm -f "${script_output}"
43 trap - EXIT TERM INT
54 echo "Basic --per-thread mode test"
[all …]
H A Dstat_bpf_counters_cgrp.sh2 # perf stat --bpf-counters --for-each-cgroup test
3 # SPDX-License-Identifier: GPL-2.0
5 set -e
8 if [ "$1" = "-v" ]; then
12 # skip if --bpf-counters --for-each-cgroup is not supported
15 if ! perf stat -a --bpf-counters --for-each-cgroup / true > /dev/null 2>&1; then
17 echo "Skipping: --bpf-counters --for-each-cgroup not supported"
18 perf --no-pager stat -a --bpf-counters --for-each-cgroup / true || true
28 if [ -d /sys/fs/cgroup/system.slice ] && [ -d /sys/fs/cgroup/user.slice ]; then
29 test_cgroups="system.slice,user.slice"
[all …]
H A Dtest_arm_spe.sh8 # SPDX-License-Identifier: GPL-2.0
12 perf list pmu | grep -E -q 'arm_spe_[0-9]+//' && return 0
25 rm -f ${perfdata}
26 rm -f ${perfdata}.old
46 # from arm-spe.c/arm_spe_synth_events()
47 …events="(ld1-miss|ld1-access|llc-miss|lld-access|tlb-miss|tlb-access|branch-miss|remote-access|mem…
50 …# dd 3048 [002] 1 l1d-access: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-…
51 …# dd 3048 [002] 1 tlb-access: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-…
52 … 1 memory: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so)
53 perf script -F,-time -i ${perfdata} 2>&1 | \
[all …]
/linux/tools/perf/Documentation/
H A Dperf-stat.txt1 perf-stat(1)
5 ----
6 perf-stat - Run a command and gather performance counter statistics
9 --------
11 'perf stat' [-e <EVENT> | --event=EVENT] [-a] <command>
12 'perf stat' [-e <EVENT> | --event=EVENT] [-a] \-- <command> [<options>]
13 'perf stat' [-e <EVENT> | --event=EVENT] [-a] record [-o file] \-- <command> [<options>]
14 'perf stat' report [-i file]
17 -----------
23 -------
[all …]
H A Dperf-amd-ibs.txt1 perf-amd-ibs(1)
5 ----
6 perf-amd-ibs - Support for AMD Instruction-Based Sampling (IBS) with perf tool
9 --------
11 'perf record' -e ibs_op//
12 'perf record' -e ibs_fetch//
15 -----------
17 Instruction-Based Sampling (IBS) provides precise Instruction Pointer (IP)
20 execution (micro-op execution to be precise) with details like d-cache
21 hit/miss, d-TLB hit/miss, cache miss latency, load/store data source, branch
[all …]
/linux/Documentation/admin-guide/pm/
H A Dsuspend-flows.rst1 .. SPDX-License-Identifier: GPL-2.0
5 System Suspend Code Flows
12 At least one global system-wide transition needs to be carried out for the
13 system to get from the working state into one of the supported
14 :doc:`sleep states <sleep-states>`. Hibernation requires more than one
16 referred to as *system-wide suspend* (or simply *system suspend*) states, need
19 For those sleep states, the transition from the working state of the system into
20 the target sleep state is referred to as *system suspend* too (in the majority
21 of cases, whether this means a transition or a sleep state of the system should
23 working state is referred to as *system resume*.
[all …]
H A Dstrategies.rst1 .. SPDX-License-Identifier: GPL-2.0
13 The Linux kernel supports two major high-level power management strategies.
15 One of them is based on using global low-power states of the whole system in
16 which user space code cannot be executed and the overall system activity is
17 significantly reduced, referred to as :doc:`sleep states <sleep-states>`. The
18 kernel puts the system into one of these states when requested by user space
19 and the system stays in it until a special signal is received from one of
21 user space code can run. Because sleep states are global and the whole system
23 :doc:`system-wide power management <system-wide>`.
25 The other strategy, referred to as the :doc:`working-state power management
[all …]
/linux/Documentation/scsi/
H A Dadvansys.rst1 .. SPDX-License-Identifier: GPL-2.0
7 AdvanSys (Advanced System Products, Inc.) manufactures the following
8 RISC-based, Bus-Mastering, Fast (10 Mhz) and Ultra (20 Mhz) Narrow
9 (8-bit transfer) SCSI Host Adapters for the ISA, EISA, VL, and PCI
10 buses and RISC-based, Bus-Mastering, Ultra (20 Mhz) Wide (16-bit
21 - ABP-480 - Bus-Master CardBus (16 CDB)
24 - ABP510/5150 - Bus-Master ISA (240 CDB)
25 - ABP5140 - Bus-Master ISA PnP (16 CDB)
26 - ABP5142 - Bus-Master ISA PnP with floppy (16 CDB)
27 - ABP902/3902 - Bus-Master PCI (16 CDB)
[all …]
H A DFlashPoint.rst1 .. SPDX-License-Identifier: GPL-2.0
13 MYLEX INTRODUCES LINUX OPERATING SYSTEM SUPPORT FOR ITS
17 FREMONT, CA, -- October 8, 1996 -- Mylex Corporation has expanded Linux
18 operating system support to its BusLogic brand of FlashPoint Ultra SCSI
20 MultiMaster line, currently support the Linux operating system. Linux
30 The Linux Operating System
33 Linux is a freely-distributed implementation of UNIX for Intel x86, Sun
35 machines. It supports a wide range of software, including the X Window
36 System, Emacs, and TCP/IP networking. Further information is available at
43 and file server environments, are available in narrow, wide, dual channel,
[all …]
H A DBusLogic.rst1 .. SPDX-License-Identifier: GPL-2.0
21 Copyright 1995-1998 by Leonard N. Zubkoff <lnz@dandelion.com>
57 BT-948/958/958D, will always be available from my Linux Home Page at URL
62 driver and SCSI subsystem at startup, along with any subsequent system messages
63 relevant to SCSI operations, and a detailed description of your system's
69 the BT-948 PCI Ultra SCSI Host Adapter, and then again for the BT-958 PCI Wide
90 94555, USA and can be reached at 510/796-6100 or on the World Wide Web at
92 mail at techsup@mylex.com, by Voice at 510/608-2400, or by FAX at 510/745-7715.
101 -----------------------------------
103 During system initialization, the driver reports extensively on the host
[all …]
/linux/tools/perf/tests/shell/lib/
H A Dstat_output.sh2 # SPDX-License-Identifier: GPL-2.0
7 [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
13 echo -n "Checking $1 output: no args "
15 commachecker --no-args
21 echo -n "Checking $1 output: system wide "
27 perf stat -a $2 true
28 commachecker --system-wide
34 echo -n "Checking $1 output: system wide no aggregation "
40 perf stat -A -a --no-merge $2 true
41 commachecker --system-wide-no-aggr
[all …]
/linux/Documentation/arch/riscv/
H A Dvector.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Vector Extension Support for RISC-V Linux
8 order to support the use of the RISC-V Vector Extension.
11 ---------------------
19 are not portable to non-Linux, nor non-RISC-V environments, so it is discourage
27 argument consists of two 2-bit enablement statuses and a bit for inheritance
30 Enablement status is a tri-state value each occupying 2-bit of space in
33 * :c:macro:`PR_RISCV_V_VSTATE_CTRL_DEFAULT`: Use the system-wide default
34 enablement status on execve(). The system-wide default setting can be
43 arg: The control argument is a 5-bit value consisting of 3 parts, and
[all …]
/linux/tools/perf/arch/arm64/util/
H A Dtsc.c1 // SPDX-License-Identifier: GPL-2.0
13 * system counter is at least 56 bits wide; from Armv8.6, the counter in rdtsc()
14 * must be 64 bits wide. So the system counter could be less than 64 in rdtsc()
15 * bits wide and it is attributed with the flag 'cap_user_time_short' in rdtsc()
/linux/include/linux/
H A Dsuspend.h1 /* SPDX-License-Identifier: GPL-2.0 */
44 * struct platform_suspend_ops - Callbacks for managing platform dependent
45 * system sleep states.
47 * @valid: Callback to determine if given system sleep state is supported by
50 * that it still may be impossible to enter given system sleep state if the
55 * @begin: Initialise a transition to given system sleep state.
63 * @prepare: Prepare the platform for entering the system sleep state indicated
69 * system canno
[all...]
/linux/certs/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
16 certificate as described in Documentation/admin-guide/module-signing.rst
45 bool "Provide system-wide ring of trusted keys"
50 Provide a system keyring to which trusted keys can be added. Keys in
52 by the kernel from compiled-in data and from hardware key stores, but
59 string "Additional X.509 keys for default system keyring"
62 If set, this option should be the filename of a PEM-formatted file
64 system keyring. Any certificate used for module signing is implicitly
67 NOTE: If you previously provided keys for the system keyring in the
68 form of DER-encoded *.x509 files in the top-level build directory,
[all …]
/linux/Documentation/power/
H A Dfreezing-of-tasks.rst11 kernel threads are controlled during hibernation or system-wide suspend (on some
17 There is one per-task flag (PF_NOFREEZE) and three per-task states
21 system enters a sleep state as well as before a hibernation image is created
23 to system-wide suspend too).
26 freeze_processes() (defined in kernel/power/process.c) is called. A system-wide
27 static key freezer_active (as opposed to a per-task flag or state) is used to
28 indicate whether the system is to undergo a freezing operation. And
45 signal-handling code, but the freezable kernel threads need to call it
61 oom_reaper_list = tsk->oom_reaper_list;
73 entire system-wide transition will be cancelled. For this reason, freezable
[all …]
/linux/Documentation/trace/
H A Dtracepoint-analysis.rst15 what is going on within the system. There are a large number of methods for
27 ----------------------
32 $ find /sys/kernel/tracing/events -type d
37 ----------------------------------------
55 3.1 System-Wide Event Enabling
56 ------------------------------
59 can be enabled system-wide. A short example of enabling all events related
62 $ for i in `find /sys/kernel/tracing/events -name "enable" | grep mm_`; do echo 1 > $i; done
64 3.2 System-Wide Event Enabling with SystemTap
65 ---------------------------------------------
[all …]
/linux/Documentation/scheduler/
H A Dsched-rt-group.rst2 Real-Time group scheduling
12 2.1 System-wide settings
21 Fiddling with these settings can result in an unstable system, the knobs are
27 system when the period is smaller than either the available hrtimer
31 system when the runtime is so small the system has difficulty making
33 are real-time processes).
40 ---------------
42 Real-time scheduling is all about determinism, a group has to be able to rely on
44 multiple groups of real-time tasks, each group must be assigned a fixed portion
45 of the CPU time available. Without a minimum guarantee a real-time group can
[all …]
/linux/rust/kernel/
H A Dtime.rs1 // SPDX-License-Identifier: GPL-2.0
10 //! - The [`Instant`] type represents a specific point in time.
11 //! - The [`Delta`] type represents a span of time.
50 pub fn msecs_to_jiffies(msecs: Msecs) -> Jiffies { in msecs_to_jiffies()
72 fn ktime_get() -> bindings::ktime_t;
77 /// A nonsettable system-wide cloc
[all...]
/linux/arch/arm/include/asm/
H A Dfirmware.h1 /* SPDX-License-Identifier: GPL-2.0-only */
46 * Enter system-wide suspend.
50 * Restore state of privileged hardware after system-wide suspend.
62 * otherwise returns -ENOSYS
65 ((firmware_ops->op) ? firmware_ops->op(__VA_ARGS__) : (-ENOSYS))

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