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Cache size and characteristics of multi-core processors

Wiki: Cache sizes in multicore architectures

Create a table of caches used in current multicore architectures, including such parameters as number of levels, line size, size and associativity of each level, latency of each level, whether each level is shared, and coherence protocol used. Compare this with two or three recent single-core designs.

AMD Opteron Server/workstation 2 cores, 4/22/2005

L1: 64KB (Data) + 64KB (Instruction) per core 2way associative data cache, two 64bits operations per cycle, 3 cycle latency 2way associative instruction cache, L2: 1 MB per core, 16way associative

Athlon 64 X2 family 2 cores 5/13/2005 L1: 64KB (Data) + 64KB (Instruction) per core 2way associative data cache, two 64bits operations per cycle, 3 cycle latency 2way associative instruction cache, L2: up to 1 MB per core, 16way associative Athlon 64 FX High performance desktop L1: 64KB (Data) + 64KB (Instruction) per core 2way associative data cache, two 64bits operations per cycle, 3 cycle latency 2way associative instruction cache, L2: up to 1 MB per core, 16way associative Athlon64 ### L1: 64K Data + 64K Instr. 2way associative data cache, two 64bits operations per cycle, 3 cycle latency 2way associative instruction cache, L2 : 512K 16 way associative Turion 64 X2 Laptop L1: Total 256KB (128K per core) L2: Total 1MB (512K per core) ARM MPCore container for ARM9 & ARM11 High-performance embedded and entertainment

Broadcom SiByte SB1250 Two scalable MIPS core, MESI L1: 32K data + 32K instruction Cache block 32 bytes Cache line 32 bytes L1 to L1 latency : 28~36 cycles

L2: 512K shared, ECC, 4way associative 32 bytes cache line

SB1255 L1: 32K data + 32K instruction Cache block 32 bytes Cache line 32 bytes L1 to L1 latency : 28~36 cycles

L2: 512K shared, ECC, 4way associative 32 bytes cache line

SB1455 L1: 32K data + 32K instruction

L2: 1MB shared, 8way associative, ECC protected Cradle Technology CT3400 CT3600 Multi-core DSP CT3400 8 32bits DSPs, 6 RISC-like CPUs 32K instruction cache, 64K local data memory

CT3600 2 quad DSPs, 8 DPS per quad, 32KB instruction cache per quad, 125K data memory per quad

Cavium Networks Octeon 16 MIPS cores CN38XX/CN36XX 4 to 16 MIPS64 cores 1M ECC protected shared L2 (CN38XX), 512K (CN36XX) 32K instruction cache/8K data cache/2K write buffer per every MIPS core IBM Cell In the PlayStation 3 PowerPC based 8 cores optimized for vector operation Power4 1st dual core 2000

Power4 L1: 64K per CPU instruction cache(128byte line, dirrect map, LRU)

    32K per CPU data cache (2way, 128byte line, LRU)

L2: 1440K, 8way, 128 byte line L3: 128M, 8way 512 byte line

Power4+ L1: data 32K(2way set), instruction 64K(directly mapped) L2: 3 x 0.5M shared by dual core, 40B/cycle per port L3: 32M Power5 Dual core

L1: I-64K(2way LRU), D-32K(4way, LRU) L2: three 0.625M, 10way, LRU, 128 byte line L3: 36M, 12way PowerPC 970MP Dual In the Apple PowerMac L1: 32K data(2 way associative with parity protection), 64K instruction (directly mapped)

L2: 1M per core, ECC Cache-coherency snooping protocol Intel Core2 Quad Xeon Quad core 12/13/2006

Xeon 5000 L1: 16KB (Data cache per core)+ 12KµOPS(Trace cache per core) L2: 2MB per core

Xeon MP7000 L1:16KB (Data cache per core)+ 12K µOPS (Trace cache per core) L2: 1MB per core or 2x2MB per core

Xeon MP7300 L1: 32K data per core, 32K instruction per core L2: up tp 8MB, snoop filter, 4M shared L2 per die Core Duo Core2 Duo Xeon (x1xx) Dual core

Xeon 5100 L1 : 32KB (Data) + 32KB (Instruction) per core L2 : 4MB (Shared)

Xeon 7100 L1: 16K data L2: 2M 8way ECC L3: up to 16M ECC. 16way

Itanium 2 Multi-core Montecito

Itanium2 L1:32KB L2:256KB L3:up to 9MB PARISC PA8800 PA8800 L1: 1.5M data 4way set, 1.5M instruction 4way set, 2cycle L2: 32M

Stream Processor Strom-1 fmaily 40 to 80 ALUs

SP16HP-G220, SP16-G160, SP8-G80 L1: 32K data, 16K instruction

96K VLIW instruction memory

Sun Microsystems UltraSPARC IV UltraSPARC IV+ UltraSPARC IV dual L1: 64K data, 32K instruction L2: up to 16MB, external 8M 2way set associative per core Cache line sizes changed 512 to 128 bytes to reduce data contentionassociated with sub-blocked cache, LRU replacement policy, ECC write cache: hash-indexed 2K, 2K prefetch cache

UltraSPARC IV+ L2: 2M on-chip L3: 32M external

UlatraSPARC T1 8 cores L1: 16K instruction cache per core, 4way-set associative parity protected 8K data cache , parity protected, 4way set associative

L2: 3M 12way, 4banks, ECC