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/openbmc/linux/Documentation/locking/
H A Dfutex-requeue-pi.rst2 Futex Requeue PI
5 Requeueing of tasks from a non-PI futex to a PI futex requires
7 left without an owner if it has waiters; doing so would break the PI
11 "PI".
51 previously mentioned PI-boosting algorithms.
53 In order to support PI-aware pthread_condvar's, the kernel needs to
54 be able to requeue tasks to PI futexes. This support implies that
56 user space already holding the PI futex. The glibc implementation
81 The actual glibc implementation will likely test for PI and make the
83 calls for the PI cases. Similar changes are needed for
[all …]
H A Dpi-futex.rst2 Lightweight PI-futexes
7 - in the user-space fastpath a PI-enabled futex involves no kernel work
8 (or any other PI complexity) at all. No registration, no extra kernel
14 - the in-kernel PI implementation is streamlined around the mutex
23 The short reply: user-space PI helps achieving/improving determinism for
25 determinism and well-bound latencies. Even in the worst-case, PI will
66 Currently (without PI), if a high-prio and a low-prio task shares a lock
78 As mentioned before, the userspace fastpath of PI-enabled pthread
94 own TID into the futex value], and attaches a 'PI state' structure to
95 the futex-queue. The pi_state includes an rt-mutex, which is a PI-aware,
[all …]
H A Drt-mutex-design.rst17 inheritance (PI) algorithm that is used, as well as reasons for the
18 decisions that were made to implement PI in the manner that was done.
58 Priority Inheritance (PI)
62 for this document. Here we only discuss PI.
64 PI is where a process inherits the priority of another process if the other
77 the design that is used to implement PI.
79 PI chain
80 - The PI chain is an ordered series of locks and processes that cause
87 PI and spin locks that are used in the PI code, from now on
88 the PI locks will be called a mutex.
[all …]
H A Drt-mutex.rst2 RT-mutex subsystem with PI support
5 RT-mutexes with priority inheritance are used to support PI-futexes,
8 about PI-futexes.]
/openbmc/linux/arch/m68k/fpsp040/
H A Dstan.S83 |--N*PI/2, -32 <= N <= 32, IN A LEADING TERM IN EXT. AND TRAILING
84 |--TERM IN SGL. NOTE THAT PI IS 64-BIT LONG, THUS N*PI/2 IS AT
181 cmpil #0x4004BC7E,%d0 | ...|X| < 15 PI?
187 |--THIS IS THE USUAL CASE, |X| <= 15 PI.
190 fmuld TWOBYPI,%fp1 | ...X*2/PI
193 leal PITBL+0x200,%a1 | ...TABLE OF N*PI/2, N = -32,...,32
292 |--IF |X| > 15PI, WE USE THE GENERAL ARGUMENT REDUCTION.
322 | ;create 2**16383*PI/2
327 | ;PI/2 at FP_SCR3
340 |--ON ENTRY, FP0 IS X, ON RETURN, FP0 IS X REM PI/2, |X| <= PI/4.
[all …]
H A Dsacos.S48 PI: .long 0x40000000,0xC90FDAA2,0x2168C235,0x00000000 label
57 |--ACOS(X) = PI/2 FOR DENORMALIZED X
H A Dssin.S194 cmpil #0x4004BC7E,%d0 | ...|X| < 15 PI?
199 |--THIS IS THE USUAL CASE, |X| <= 15 PI.
202 fmuld TWOBYPI,%fp1 | ...X*2/PI
205 lea PITBL+0x200,%a1 | ...TABLE OF N*PI/2, N = -32,...,32
459 addil #0x00003FFF,%d2 | ...BIASED EXPO OF 2**L * (PI/2)
548 cmpil #0x4004BC7E,%d0 | ...|X| < 15 PI?
554 |--THIS IS THE USUAL CASE, |X| <= 15 PI.
557 fmuld TWOBYPI,%fp1 | ...X*2/PI
560 lea PITBL+0x200,%a1 | ...TABLE OF N*PI/2, N = -32,...,32
H A Ddo_func.S57 PPIBY2: .long 0x3FFF0000,0xC90FDAA2,0x2168C235 |+PI/2
58 MPIBY2: .long 0xbFFF0000,0xC90FDAA2,0x2168C235 |-PI/2
504 |**Returns +PI/2
510 |**Returns -PI/2
/openbmc/linux/Documentation/devicetree/bindings/powerpc/nintendo/
H A Dgamecube.txt25 1.b) The Processor Interface (PI) node
33 - reg : should contain the PI registers location and length
39 the PI node.
H A Dwii.txt34 1.b) The Processor Interface (PI) node
42 - reg : should contain the PI registers location and length
48 the PI node.
/openbmc/qemu/hw/audio/
H A Dcs4231a.c99 #define PI (1 << 4) macro
493 if ((s->dregs[iaddr] & PI) && !(val & PI)) { in cs_write()
518 s->dregs[Alternate_Feature_Status] &= ~(PI | CI | TI); in cs_write()
599 s->dregs[Alternate_Feature_Status] |= PI; in cs_dma_read()
H A Dfmopl.c37 #ifndef PI
38 #define PI 3.14159265358979323846 macro
647 pom = sin(2*PI*s/SIN_ENT); /* sin */ in OPLOpenTable()
679 pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */ in OPLOpenTable()
687 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */ in OPLOpenTable()
/openbmc/linux/arch/arm/boot/dts/nxp/imx/
H A Dimx6q-pico-pi.dts15 model = "TechNexion PICO-IMX6 Quad Board and PI baseboard";
H A Dimx6dl-pico-pi.dts15 model = "TechNexion PICO-IMX6 DualLite/Solo Board and PI baseboard";
H A Dimx7d-pico-pi.dts8 model = "TechNexion PICO-IMX7D Board and PI baseboard";
H A Dimx6ul-pico-pi.dts12 model = "TechNexion PICO-IMX6UL and PI baseboard";
/openbmc/u-boot/board/technexion/pico-imx7d/
H A DMAINTAINERS13 TechNexion PICO-PI-IMX7
/openbmc/u-boot/board/technexion/pico-imx6ul/
H A DMAINTAINERS14 TechNexion PICO-PI-IMX6UL
/openbmc/linux/arch/arm/boot/dts/
H A Dcros-adc-thermistors.dtsi7 * Exynos5800 based Peach PI.
/openbmc/linux/drivers/media/test-drivers/vidtv/
H A Dvidtv_s302m.c48 #define PI 180 macro
262 pos = (2 * PI * ctx->note_offset * ctx->last_tone) / S302M_SAMPLING_RATE_HZ; in vidtv_s302m_get_sample()
265 return (fixp_sin32(pos % (2 * PI)) >> 16) + 0x8000; in vidtv_s302m_get_sample()
/openbmc/openbmc/poky/meta/recipes-rt/rt-tests/
H A Drt-tests_git.bb19 # rt-tests needs PI mutex support in libc
/openbmc/u-boot/arch/arm/dts/
H A Dimx6ul-pico-pi.dts12 model = "TechNexion PICO-IMX6UL and PI baseboard";
/openbmc/u-boot/doc/device-tree-bindings/clock/
H A Drockchip,rk3399-dmc.txt9 - reg: dynamic ram protocol controller(PCTL) address, PHY Independent(PI) address, phy controller(P…
/openbmc/phosphor-mrw-tools/
H A Dpatchxml.py135 (node.tag is etree.PI)
/openbmc/linux/drivers/staging/vc04_services/
H A DKconfig10 by the Raspberry PI.

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