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- ぜんすけ おおふさ
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1 Super Computing in Accelerator simulations - Electron Gun simulation using GPGPU - K. Ohmi, KEK-Accel Accelerator Physics seminar
2 Super computers in KEK HITACHI SR11000 POWER GB GFlops, total 2.15 TFlops IBM Blue Gene PowerPC MB 10, TFlops
3 x3 3
4 Particle In Cell (PIC) ( ) Particle In Cell Particle-Particle
5 Particle In Cell,
6 Particle In Cell (PIC) (2-3 ) cell α
7 FFT G(r r )ρ(r )dr (CR) FFT CR 7
8 1/γ 2 1/γ (d 2 x/dt 2 ) 2
9 PIC Beam-beam PIC cell 100x x200 limit
10 PIC cell ( ) ( ) cell
11 SR11000 KEKB SuperKEKB 10 4 x10 4 = CPU JPARC-MR
12 GRAPE NxN 1/N1/2
13 e + e - z+ z- s=0 s s=(z+,i-z-,j)/2 z +,i+z-,j
14 s 1 N 2 1 N 2 xtime step z
15 (SuperKEKB) 10 6 x x x x time step
16 (J-PARC) ( beam-beam ) 10 8 time step
17 Blue Gene 128x kB 1.5msx108 =40h, Glue Gene IBM ( ) 128KB MPI_Allreduce rhoxy calc_potential_psn phi 128KB 128x128 MPI_Allreduce 10^8 10^ CPU sec 32 64CPU sec 10^8 10^4 MPI_Allreduce tree N N 32 32=2^ =2^9 9/5
18 SR11000 KEKB SuperKEKB 10 4 x10 4 = CPU JPARC-MR
19 Blue Gene JPARC Space charge simulation (50 )
20 HITACHI SR11000 KEK super computer System A GPU(Tesla1060)
21 RF
22 Electron Gun for KEK cerl Q=80 pc (max) σr=0.5mm σt=10-20 ps Ez=7 MV/m V=500 kv
23 PIC solver in KEK-System A 3D Poisson solver Boundary condition in free space, φ( )=0. Green function Potential ϕ(r) = 1 4π 0 G(r) = 1 r G(r r )ρ(r )dr
24 Implementation Make Green function table G i,j,k = 1 x y z G(r) = 1 r xi + x/2 yj + y/2 zk + z/2 x i x/2 1 x2 + y 2 + z 2 dr = y j y/2 z k z/2 1 x2 + y 2 + z 2 dr x2 yz 2 tan 1 x y2 zx x 2 + y 2 + z 2 2 tan 1 y z2 xy x 2 + y 2 + z 2 2 tan 1 z x 2 + y 2 + z 2 +yz ln(x + x 2 + y 2 + z 2 )+zxln(y + x 2 + y 2 + z 2 )+xy ln(z + x 2 + y 2 + z 2 ) Calculate ρ array from macro particles distribution ρ i,j,k
25 ϕ(r) = 1 4π 0 Integration, convolution G(r r )ρ(r )dr = 1 4π 0 Direct summation Range of the suffix: i=1,nx, i-i =1-Nx,Nx-1 Since G-i,j,k=Gi,j.k, the G table size can be NxNyNz. i,j,k G i i,j j,k k ρ i,j,k
26 Solver using FFT G(k) = ρ(k) = G(r) exp(ik r)dr ρ(r) exp(ik r)dr Convolution ϕ(r) = 1 4π 0 1 (2π) 3 G(k)ρ(k) exp( ik r)dk
27 Discrete space G k = N xyz i=1 G(r i ) exp(ik r i ) G(r i )= 1 N xyz N xyz k=1 G k exp( ik r i ) ρ k = N xyz i=1 ρ(r i ) r exp(ik r i ) ρ(r i ) r = 1 N xyz N xyz i=1 ρ k exp( ik r i ) Convolution 4π 0 ϕ(r i )= j G(r i r j )ρ(r j ) r = 1 N xyz N xyz k=1 G k ρ k exp( ik r i )
28 Shifted Green function Mirror charge Mirror charge Green G m (r) = 1 r r 0 G i,j,k = 1 x y z xi + x/2 yj + y/2 zk + z/2 x i x/2 y j y/2 z k z/2 1 x2 + y 2 +(z z 0 ) 2 dr 1 x2 + y 2 +(z z 0 ) 2
29 Potential of Gaussian Charge distribution with σr=1mm Green: Charge distribution in free space Red: Charge distribution with mirror at x=0.035 mirror at free space 1/r (m mirror y=z= r = x (m)
30 GPGPU GPGPU - General Purpose computing on Graphical Processor Unit CUDA(NVIDIA), ATI Stream(ATI), OpenCL My machine: Core i7 PC with NVIDIA Tesla 1060 (500k yen). NVIDIA Tesla, 240 PU/GPU, 4GB memory Tesla performance 0.933TFlops/single precision and 78GFlops/double precision. KEK supercomputer SR11000, 0.13TFlops/Node.
31
32 3D particle-particle interaction Based on a Demo code: Fast N-Body Simulation with CUDA (L. Nyland, M. Harris, J. Prins, NVIDIA SDK) F i = e2 4π 0 j=i r ij ( r ij 2 + ε 2 ) 3/2 r ij = r i r j
33 CPU GPU GPU GPU CPU
34 H = P = ee(z) Ż = Reference frame P 2 c 2 + m 2 0 c4 e z 0 E(z )dz Pc 2 P 2 c 2 + m 2 0 c4 P = m 0 V 1 V 2 /c 2 P n = P n 1 + ee(z n 1 ) t V n = P n c 2 P 2 n + m 2 0 c4 Z n = Z n 1 + P n c 2 t P 2 n + m 2 0c4
35 Lorentz transformation Space charge r =...e H 0 e eez L(V 2 )e ϕ L 1 (V 2 ) e H 0 e eez L(V 1 )e ϕ L 1 (V 1 ) L 1 (V 2 )e eez e H 0 L(V 1 ) reference frame z, Δt Lorentz e H 0 e eez e ϕ r 0
36 Equation of motion in the reference frame v i,n = n e r e c 2 t N e /n e 1 Vn 2 /c 2 j=i r ij ( r ij 2 + ε 2 ) 3/2 n e : charge in a macro particle Particle motion is assumed to be non-relativistic in the reference frame.
37 Expression of L(V) L -1 (V1) e e R Edr e H 0 L(V2) v x,0 = v x 1 V 2 1 /c 2 1 V 1 v z /c 2 v y,0 = v y 1 V 2 1 /c 2 1 V 1 v z /c 2 v z,0 = v z V 1 1 V 1 v z /c 2 v x = v x,0 1 V 2 2 /c 2 1+V 2 v z,0 /c 2 v y = v y,0 1 V 2 2 /c 2 1+V 2 v z,0 /c 2 v z = v z,0 + V 2 1+V 2 v z,0 /c 2 z 0 = z V 1 t 1 V 2 1 /c 2 t 0 = t V 1z/c 2 1 V 2 1 /c 2 t 0 = t 1 V1 2/c2 z = z 0 + V 2 t 0 1 V 2 2 /c 2 t = t 0 + V 2 z 0 /c 2 1 V 2 2 /c 2
38 H = r p 2 c 2 + m 2 0 c4 e 0 H0 E(r )dr p n = p n 1 + ee(r n 1 ) t r n = r n 1 + p n c 2 t p 2 n c 2 + m 2 0c4
39 NVIDIA-Tesla: 30,000 ( 400GFlops sec/step. 100, sec/step ( N 2 ) Hitachi SR11000(KEK-SystemA), 3D-PIC 100, sec/step ( Blue Gene(KEK-SystemB)
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23 Fig. 2: hwmodulev2 3. Reconfigurable HPC 3.1 hw/sw hw/sw hw/sw FPGA PC FPGA PC FPGA HPC FPGA FPGA hw/sw hw/sw hw- Module FPGA hwmodule hw/sw FPGA h
23 FPGA CUDA Performance Comparison of FPGA Array with CUDA on Poisson Equation ([email protected]), ([email protected]), ([email protected]), ([email protected]),
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m dv = mg + kv2 dt m dv dt = mg k v v m dv dt = mg + kv2 α = mg k v = α 1 e rt 1 + e rt m dv dt = mg + kv2 dv mg + kv 2 = dt m dv α 2 + v 2 = k m dt d
m v = mg + kv m v = mg k v v m v = mg + kv α = mg k v = α e rt + e rt m v = mg + kv v mg + kv = m v α + v = k m v (v α (v + α = k m ˆ ( v α ˆ αk v = m v + α ln v α v + α = αk m t + C v α v + α = e αk m
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GPGPU 2013 1008 2015 1 23 Abstract In recent years, with the advance of microscope technology, the alive cells have been able to observe. On the other hand, from the standpoint of image processing, the
Fourier series to Fourier transform Masahiro Yamamoto September 9, 2016 OB (r j)j r (r i)i Figure 1: normal coordinate, projection, inner product 3 r
Fourier series to Fourier transform Masahiro Yamamoto September 9, 2016 OB (r j)j r (r i)i Figure 1: normal coordinate, projection, inner product 3 r i.j, k x = r i, y = r j, z = r k r = xi + yj + zk N
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A = QΛQ T A n n Λ Q A = XΛX 1 A n n Λ X GPGPU A 3 T Q T AQ = T (Q: ) T u i = λ i u i T {λ i } {u i } QR MR 3 v i = Q u i A {v i } A n = 9000 Quad Core Xeon 2 LAPACK (4/3) n 3 O(n 2 ) O(n 3 ) A {v i }
2 G(k) e ikx = (ik) n x n n! n=0 (k ) ( ) X n = ( i) n n k n G(k) k=0 F (k) ln G(k) = ln e ikx n κ n F (k) = F (k) (ik) n n= n! κ n κ n = ( i) n n k n
. X {x, x 2, x 3,... x n } X X {, 2, 3, 4, 5, 6} X x i P i. 0 P i 2. n P i = 3. P (i ω) = i ω P i P 3 {x, x 2, x 3,... x n } ω P i = 6 X f(x) f(x) X n n f(x i )P i n x n i P i X n 2 G(k) e ikx = (ik) n
Table 1: Basic parameter set. Aperture values indicate the radius. δ is relative momentum deviation. Parameter Value Unit Initial emittance 10 mm.mrad
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GPUを用いたN体計算
単精度 190Tflops GPU クラスタ ( 長崎大 ) の紹介 長崎大学工学部超高速メニーコアコンピューティングセンターテニュアトラック助教濱田剛 1 概要 GPU (Graphics Processing Unit) について簡単に説明します. GPU クラスタが得意とする応用問題を議論し 長崎大学での GPU クラスタによる 取組方針 N 体計算の高速化に関する研究内容 を紹介します. まとめ
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Agenda GRAPE-MPの紹介と性能評価 GRAPE-MPの概要 OpenCLによる四倍精度演算 (preliminary) 4倍精度演算用SIM 加速ボード 6 processor elem with 128 bit logic Peak: 1.2Gflops
Agenda GRAPE-MPの紹介と性能評価 GRAPE-MPの概要 OpenCLによる四倍精度演算 (preliminary) 4倍精度演算用SIM 加速ボード 6 processor elem with 128 bit logic Peak: 1.2Gflops ボードの概要 Control processor (FPGA by Altera) GRAPE-MP chip[nextreme
AHPを用いた大相撲の新しい番付編成
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k m m d2 x i dt 2 = f i = kx i (i = 1, 2, 3 or x, y, z) f i σ ij x i e ij = 2.1 Hooke s law and elastic constants (a) x i (2.1) k m σ A σ σ σ σ f i x
k m m d2 x i dt 2 = f i = kx i (i = 1, 2, 3 or x, y, z) f i ij x i e ij = 2.1 Hooke s law and elastic constants (a) x i (2.1) k m A f i x i B e e e e 0 e* e e (2.1) e (b) A e = 0 B = 0 (c) (2.1) (d) e
120 9 I I 1 I 2 I 1 I 2 ( a) ( b) ( c ) I I 2 I 1 I ( d) ( e) ( f ) 9.1: Ampère (c) (d) (e) S I 1 I 2 B ds = µ 0 ( I 1 I 2 ) I 1 I 2 B ds =0. I 1 I 2
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PowerPoint Presentation
2010 KEK (Japan) (Japan) (Japan) Cheoun, Myun -ki Soongsil (Korea) Ryu,, Chung-Yoe Soongsil (Korea) 1. S.Reddy, M.Prakash and J.M. Lattimer, P.R.D58 #013009 (1998) Magnetar : ~ 10 15 G ~ 10 17 19 G (?)
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LLG-R8.Nisus.pdf
d M d t = γ M H + α M d M d t M γ [ 1/ ( Oe sec) ] α γ γ = gµ B h g g µ B h / π γ g = γ = 1.76 10 [ 7 1/ ( Oe sec) ] α α = λ γ λ λ λ α γ α α H α = γ H ω ω H α α H K K H K / M 1 1 > 0 α 1 M > 0 γ α γ =
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Microsoft PowerPoint - GPU_computing_2013_01.pptx
GPU コンピューティン No.1 導入 東京工業大学 学術国際情報センター 青木尊之 1 GPU とは 2 GPGPU (General-purpose computing on graphics processing units) GPU を画像処理以外の一般的計算に使う GPU の魅力 高性能 : ハイエンド GPU はピーク 4 TFLOPS 超 手軽さ : 普通の PC にも装着できる 低価格
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cm λ λ = h/p p ( ) λ = cm E pc [ev] 2.2 quark lepton u d c s t b e 1 3e electric charge e color charge red blue green qq
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,, Department of Civil Engineering, Chuo University Kasuga 1-13-27, Bunkyo-ku, Tokyo 112 8551, JAPAN E-mail : [email protected] E-mail : [email protected] SATO KOGYO CO., LTD. 12-20, Nihonbashi-Honcho
