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/openbmc/linux/tools/perf/pmu-events/arch/arm64/arm/cortex-a55/
H A Dpipeline.json9 …rontend, cache miss.This event counts every cycle the DPU IQ is empty and there is an instruction …
12 …rontend, cache miss.This event counts every cycle the DPU IQ is empty and there is an instruction …
15 … frontend, TLB miss.This event counts every cycle the DPU IQ is empty and there is an instruction …
18 … frontend, TLB miss.This event counts every cycle the DPU IQ is empty and there is an instruction …
21 …d, pre-decode error.This event counts every cycle the DPU IQ is empty and there is a pre-decode er…
24 …d, pre-decode error.This event counts every cycle the DPU IQ is empty and there is a pre-decode er…
27 …backend interlock.This event counts every cycle that issue is stalled and there is an interlock. S…
30 …backend interlock.This event counts every cycle that issue is stalled and there is an interlock. S…
33 …d, interlock, AGU.This event counts every cycle that issue is stalled and there is an interlock th…
36 …d, interlock, AGU.This event counts every cycle that issue is stalled and there is an interlock th…
[all …]
/openbmc/linux/tools/perf/pmu-events/arch/arm64/arm/cortex-a510/
H A Dpipeline.json21 … cycle that the Data Processing Unit (DPU) instruction queue is empty and there is an instruction …
24 … cycle that the Data Processing Unit (DPU) instruction queue is empty and there is an instruction …
27 …This event counts every cycle that the DPU instruction queue is empty and there is an instruction …
30 …This event counts every cycle that the DPU instruction queue is empty and there is an instruction …
39 …s event counts every cycle where the issue of an operation is stalled and there is an interlock. S…
42 …s event counts every cycle where the issue of an operation is stalled and there is an interlock. S…
45 …s event counts every cycle where the issue of an operation is stalled and there is an interlock on…
48 …s event counts every cycle where the issue of an operation is stalled and there is an interlock on…
51 … or the Vector Processing Unit (VPU). This event counts every cycle where there is a stall or an i…
54 … or the Vector Processing Unit (VPU). This event counts every cycle where there is a stall or an i…
[all …]
/openbmc/linux/include/linux/atomic/
H A Datomic-instrumented.h25 * Unsafe to use in noinstr code; use raw_atomic_read() there.
42 * Unsafe to use in noinstr code; use raw_atomic_read_acquire() there.
60 * Unsafe to use in noinstr code; use raw_atomic_set() there.
78 * Unsafe to use in noinstr code; use raw_atomic_set_release() there.
97 * Unsafe to use in noinstr code; use raw_atomic_add() there.
115 * Unsafe to use in noinstr code; use raw_atomic_add_return() there.
134 * Unsafe to use in noinstr code; use raw_atomic_add_return_acquire() there.
152 * Unsafe to use in noinstr code; use raw_atomic_add_return_release() there.
171 * Unsafe to use in noinstr code; use raw_atomic_add_return_relaxed() there.
189 * Unsafe to use in noinstr code; use raw_atomic_fetch_add() there.
[all …]
/openbmc/linux/tools/perf/pmu-events/arch/arm64/arm/cortex-a53/
H A Dpipeline.json15 …"BriefDescription": "Cycles the DPU IQ is empty and there is an instruction cache miss being proce…
20 …"BriefDescription": "Cycles the DPU IQ is empty and there is an instruction micro-TLB miss being p…
25 "BriefDescription": "Cycles the DPU IQ is empty and there is a pre-decode error being processed"
30 …"BriefDescription": "Cycles there is an interlock other than Advanced SIMD/Floating-point instruc…
35 …"BriefDescription": "Cycles there is an interlock for a load/store instruction waiting for data to…
40 … "BriefDescription": "Cycles there is an interlock for an Advanced SIMD/Floating-point operation."
45 "BriefDescription": "Cycles there is a stall in the Wr stage because of a load miss"
50 "BriefDescription": "Cycles there is a stall in the Wr stage because of a store"
/openbmc/linux/Documentation/locking/
H A Drobust-futexes.rst18 that says "there's a waiter pending", and the sys_futex(FUTEX_WAIT)
23 value) that there were waiter(s) pending, and does the
26 state, and there's no in-kernel state associated with it. The kernel
27 completely forgets that there ever was a futex at that address. This
42 There is a big conceptual problem with futex based mutexes though: it is
44 the kernel cannot help with the cleanup: if there is no 'futex queue'
45 (and in most cases there is none, futexes being fast lightweight locks)
75 because the kernel has no knowledge about how many robust futexes there
89 At the heart of this new approach there is a per-thread private list of
93 time, the kernel checks this user-space list: are there any robust futex
[all …]
/openbmc/u-boot/arch/mips/mach-bmips/
H A DKconfig136 Between its different peripherals there's an integrated switch with 4
147 Between its different peripherals there's an integrated switch with 4
158 Between its different peripherals there's an integrated switch with 4
169 Between its different peripherals there's a BCM5325 switch with 4
180 Between its different peripherals there's an integrated switch with 4
191 Between its different peripherals there's a BCM53115 switch with 5
202 Between its different peripherals there's a BCM5325 switch with 4
213 Between its different peripherals there's a BCM53115 switch with 4
224 Between its different peripherals there's a BCM53125 switch with 5
235 Between its different peripherals there's a BCM5325 switch with 4
[all …]
/openbmc/linux/Documentation/timers/
H A Dno_hz.rst12 There are three main ways of managing scheduling-clock interrupts
38 there are some situations where this old-school approach is still the
40 that use short bursts of CPU, where there are very frequent idle
43 clock interrupts will normally be delivered any way because there
68 If a CPU is idle, there is little point in sending it a scheduling-clock
84 unnecessary scheduling-clock interrupts. In these situations, there
98 There is also a boot parameter "nohz=" that can be used to disable
107 If a CPU has only one runnable task, there is little point in sending it
108 a scheduling-clock interrupt because there is no other task to switch to.
121 by one less than the number of CPUs. In these situations, there is
[all …]
/openbmc/linux/arch/mips/vdso/
H A Dvgettimeofday.c23 * This is behind the ifdef so that we don't provide the symbol when there's no
24 * possibility of there being a usable clocksource, because there's nothing we
59 * This is behind the ifdef so that we don't provide the symbol when there's no
60 * possibility of there being a usable clocksource, because there's nothing we
/openbmc/linux/Documentation/process/
H A D6.Followthrough.rst13 It is a rare patch which is so good at its first posting that there is no
40 people remember who wrote kernel code, but there is little lasting fame
101 but there are times when somebody simply has to make a decision. If you
118 things. In particular, there may be more than one tree - one, perhaps,
122 For patches applying to areas for which there is no obvious subsystem tree
131 there's a good chance that you will get more comments from a new set of
151 To begin with, the visibility of your patch has increased yet again. There
153 the patch before. It may be tempting to ignore them, since there is no
162 where there are testers, there will be bug reports.
173 After any regressions have been dealt with, there may be other, ordinary
[all …]
H A D3.Early-stage.rst44 There are a number of very good Linux kernel developers, but they
87 - There may be elements of the proposed solution which will not be
131 the MAINTAINERS file for a relevant place to post. If there is a suitable
132 subsystem list, posting there is often preferable to posting on
138 and not all subsystems are represented there. The person listed in the
140 that role currently. So, when there is doubt about who to contact, a
158 list of people to Cc for your patches. There are a number of options
178 matter is (1) kernel developers tend to be busy, (2) there is no shortage
186 not assume that it means there is no interest in the project.
187 Unfortunately, you also cannot assume that there are no problems with your
[all …]
/openbmc/linux/Documentation/livepatch/
H A Dlivepatch.rst15 There are many situations where users are reluctant to reboot a system. It may
26 There are multiple mechanisms in the Linux kernel that are directly related
46 a live patch is called with the help of a custom ftrace handler. But there are
53 Functions are there for a reason. They take some input parameters, get or
64 But there are more complex fixes. For example, a patch might change
80 switching combined with kpatch's stack trace switching. There are also
119 (Note there's not yet such an approach for kthreads.)
142 There's also a /proc/<pid>/patch_state file which can be used to
150 actually delivered (there is no data in signal pending structures). Tasks are
155 /sys/kernel/livepatch/<patch>/force attribute. Writing 1 there clears
[all …]
/openbmc/linux/include/net/netfilter/
H A Dnf_tproxy.h46 * redirect the new connection to the proxy if there's a listener
51 * Returns the listener socket if there's one, the TIME_WAIT socket if
63 * - match: if there's a fully established connection matching the
68 * - match: if there's a listening socket matching the redirection
71 * address. The reasoning is that if there's an explicit rule, it
76 * Please note that there's an overlap between what a TPROXY target
105 * redirect the new connection to the proxy if there's a listener
110 * Returns the listener socket if there's one, the TIME_WAIT socket if
/openbmc/linux/tools/perf/pmu-events/arch/x86/broadwellx/
H A Duncore-power.json14 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
22 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
30 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
38 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
46 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
54 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
62 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
70 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
78 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
86 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
[all …]
/openbmc/u-boot/include/dm/
H A Duclass.h24 * There may be drivers for on-chip SoC GPIO banks, I2C GPIO expanders and
122 * @ucp: Returns pointer to uclass (there is only one per ID)
150 * @devp: Returns pointer to device (there is only one per for each ID)
173 * If an active device has this sequence it will be returned. If there is no
181 * @devp: Returns pointer to device (there is only one for each seq)
196 * @devp: Returns pointer to device (there is only one for each node)
212 * @devp: Returns pointer to device (there is only one for each node)
227 * @devp: Returns pointer to device (there is only one for each node)
228 * @return 0 if OK, -ENODEV if there is no device match the phandle, other
244 * @devp: Returns pointer to device (there is only one for each node)
[all …]
/openbmc/linux/tools/perf/pmu-events/arch/x86/broadwellde/
H A Duncore-power.json14 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
22 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
30 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
38 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
46 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
54 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
62 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
70 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
78 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
86 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
[all …]
/openbmc/linux/tools/perf/pmu-events/arch/arm64/arm/neoverse-n1/
H A Dtlb.json4there are multiple misses in the TLB that are resolved by the refill, then this event only counts …
8there are multiple misses in the TLB that are resolved by the refill, then this event only counts …
36there are multiple misses in the TLB that are resolved by the refill, then this event only counts …
40there are multiple misses in the TLB that are resolved by the refill, then this event only counts …
/openbmc/linux/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/
H A Dtlb.json4there are multiple misses in the TLB that are resolved by the refill, then this event only counts …
8there are multiple misses in the TLB that are resolved by the refill, then this event only counts …
36there are multiple misses in the TLB that are resolved by the refill, then this event only counts …
40there are multiple misses in the TLB that are resolved by the refill, then this event only counts …
/openbmc/linux/Documentation/networking/device_drivers/ethernet/toshiba/
H A Dspider_net.rst28 There are three primary states that a descriptor can be in: "empty",
46 marks it full, and advances the GDACTDPA by one. Thus, when there is
55 and advance the tail pointer. Thus, when there is flowing RX traffic,
67 then mark the descr as "empty", ready to receive data. Thus, when there
117 the hardware can fill them, there is no problem. If, for some reason,
136 and is filling the next descrs. Since the OS doesn't see this, there
157 marked xa... which is "empty". Thus, from the OS point of view, there
158 is nothing to be done. In particular, there is the implicit assumption
168 and there can be no forward progress; the OS thinks there's nothing
177 operations there. Since this will leave "holes" in the ring, there
[all …]
/openbmc/linux/fs/xfs/scrub/
H A Dreap.c53 * blocks on disk. The rmap data can tell us if there are multiple owners, so
54 * if the rmapbt says there is an owner of this block other than @oinfo, then
57 * If there is one rmap record, we can free the block, which removes the
63 * If there are no rmap records at all, we also free the block. If the btree
64 * being rebuilt lives in the free space (bnobt/cntbt/rmapbt) then there isn't
65 * supposed to be a rmap record and everything is ok. For other btrees there
67 * so if it's gone now there's something wrong and the fs will shut down.
69 * Note: If there are multiple rmap records with only the same rmap owner as
72 * and therefore doesn't need disposal. If there are multiple rmap records
112 /* Make sure there's space on the freelist. */ in xreap_put_freelist()
[all …]
/openbmc/u-boot/doc/
H A DREADME.sched16 - There are NO primitives for thread synchronization (locking,
27 - There are NO priorities, and the scheduling policy is round-robin
30 - There are NO capabilities to collect thread CPU usage, scheduler
47 - There NOT enough safety checks as are probably in the other
50 - There is no parent-child relationship between threads. Only one
/openbmc/linux/tools/perf/pmu-events/arch/x86/haswellx/
H A Duncore-power.json14 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
22 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
30 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
38 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
46 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
54 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
62 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
70 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
78 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
86 …"PublicDescription": "Number of cycles spent performing core C state transitions. There is one ev…
[all …]
/openbmc/linux/Documentation/gpu/amdgpu/display/
H A Ddc-debug.rst28 configuration changes or a full update occurs there will be a colored bar at
33 * Pipe split can be observed if there are two bars with a difference in height
41 * There should **not** be any visual corruption
42 * There should **not** be any underflow or screen flashes
43 * There should **not** be any black screens
44 * There should **not** be any cursor corruption
/openbmc/linux/Documentation/filesystems/
H A Ddebugfs.rst14 there. The debugfs filesystem is also intended to not serve as a stable
15 ABI to user space; in theory, there are no stability constraints placed on
16 files exported there. The real world is not always so simple, though [1]_;
103 architectures, though, complicating the situation somewhat. There are
112 Similarly, there are helpers for variables of type unsigned long, in decimal
153 can be used to export binary information, but there does not appear to be
200 There is a helper function to create a device-related seq_file::
212 There are a couple of other directory-oriented helper functions::
228 There is one important thing that all debugfs users must take into account:
229 there is no automatic cleanup of any directories created in debugfs. If a
[all …]
/openbmc/linux/Documentation/powerpc/
H A Dpci_iov_resource_on_powernv.rst28 There is thus, in HW, a table of PE states that contains a pair of "frozen"
33 return all 1's value. MSIs are also blocked. There's a bit more state that
66 bridge being triggered. There's a PE# in the interrupt controller
75 from the CPU address space to the PCI address space. There is one M32
92 need to ensure Linux doesn't assign anything there, the M32 logic
115 address on the PowerBus). There is a way to also set the top 14
120 has 256 segments; however, there is no table for mapping a segment
124 there's a defined ordering for which window applies.
145 than one segment, we end up with more than one PE#. There is a HW
186 There are several strategies for isolating VFs in PEs:
[all …]
/openbmc/linux/Documentation/userspace-api/media/rc/
H A Drc-protos.rst32 This IR protocol uses manchester encoding to encode 14 bits. There is a
77 There is a variant of rc5 called either rc5x or extended rc5
78 where there the second stop bit is the 6th command bit, but inverted.
81 done to keep it compatible with plain rc-5 where there are two start bits.
191 The sony protocol is a pulse-width encoding. There are three variants,
218 The sony protocol is a pulse-width encoding. There are three variants,
245 The sony protocol is a pulse-width encoding. There are three variants,
356 The scancode is the exact 16 bits as in the protocol. There is also a
365 as in the protocol. There is also a toggle bit.
373 as in the protocol. There is also a toggle bit.
[all …]

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