リアルタイムシステム
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- このか さどひら
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1 1/38
2 ...4 (Dispatch Latency) CPU (SCHED_FIFO)...17 (SCHED_RR)...18 (FBS) /38
3 (Direct IO) SMP...37 softirq System V...37 tasklet...38 workqueue /38
4 Hz 1000Hz CPU (Dispatch Latency) (jitter) 4/38
5 TCP/IP 5/38
6 (Dispatch Latency) read/write D MA /dev/null read/write write Dispatch Latency DMA DMA DMA DMA DMA 1 Dispatch Latency 2 6/38 1
7 2 2-1~ /38
8 CPU CPU CPU 8/38
9 CPU CPU RedHawk Linux 6 CPU 9/38
10 CPU CPU Concurrent RedHatMRG SolarisOS CPU Concurrent/RedHawk CPU CPU CPU CPU RedHawk OS SMP Linux Linux 10/38
11 Linux2.6 "(tasklet) (workqueue) CPU CPU CPU 11/38
12 CPU 3 CPU CPU CPU CPU CPU CPU CPU CPU 12/38
13 CPU CPU CPU sched_setaffinity (2) CPU CPU CPU CPU CPU CPU CPU CPU CPU CPU CPU Linux CPU CPU CPU CPU CPU RedHawk Linux User Guide F CPU CPU IRQ IRQ CPU CPU CPU IRQ CPU CPU IRQ shield (1) /proc/irq/n/smp_affinity Linux i386 kirqd CPU IRQ 13/38
14 IRQBALANCE RedHawk Linux noirqbalance IRQBALANCE CPU CPU 1 CPU local_irq_disable (2) CPU CPU CPU CPU CPU CPU RedHawk Linux User Guide G CPU RedHawk Linux CPU 10 CPU CPU CPU CPU 1 CPU CPU CPU 14/38
15 CPU CPU POSIX CPU CPU POSIX CPU CPU CPU 15/38
16 7 7 RedHawk Linux SCHED_OTHER sched_priority SCHED_OTHER 0 SCHED_FIFO SCHED_RR 1 99 RedHawk Linux SCHED_OTHER 40 16/38
17 SCHED_RR SCHED_FIFO 99 CPU CPU CPU CPU ps (1) top (1) (SCHED_FIFO) 17/38
18 (SCHED_RR) CPU (FBS) CPU 18/38
19 Linux CPU CPU CPU CPU CPU 19/38
20 CPU 20/38
21 POSIX shm??() shared memory:shm POSIX1003.1b shm_xx() POSIX1003.1b Linux Linux 21/38
22 Linux Linux PCIbus mem= brk() roundup sbrk() SIZE mmap() 22/38
23 read/write read/write i-node 100Hz read/write write Dispatch Latency DMA DMA DMA DMA 23/38
24 DMA DMA DMA DMA =1 PCI CPU DMA PCI DMA PCI DMA DMA DMA DMA K DMA 24/38
25 512 read-ahead/write-behind POSIX1003.1b (O_DIRECT) read/write 25/38
26 DMA CPU 26/38
27 Fill Buffer Queue 4096N Fill Buffer Queue 4096N 4096N 4096N Empty Buffer M 4096N Queue M Empty Buffer Queue Empty Buffer Queue Empty Buffer Queue Fill Buffer Queue Fill Buffer Queue Empty Buffer Queue 4096N M 1 i-node 4096N mke2fs -b i -j /dev/sdb1 linux i-node i-node 27/38
28 TCP/IP Fill Buffer Queue Fill Buffer Queue Fill Buffer Queue 4096N 4096N 4096N 4096N M 4096N M Empty Buffer Queue Empty Buffer Queue 28/38
29 read/write Linix read/write CPU POSIX mutex System V 2 29/38
30 Test & Set Test & Set Test & Set 2 CPU 2 POSIX Mutexes mutex mutex POSIX mutexes per-mutex robust() mutexes mutexes mutex mutex 30/38
31 mutex 1 1 RedHawk User Guide 31/38
32 32/38
33 CPU (run g0 b0 shield -p 1,2,3 ) IRQ (shield i 1,2,3 ) (shield l 1,2,3 ) POSIX nanosleep, POSIX pthread 33/38
34 1 2 RedHawk Linux softirqtasklet work queue 1 34/38
35 (Direct IO) IO IO Intel Pentium XeonCPU CPU 1 CPU CPU 2 2 CPU CPU 1 CPU 2 CPU 1 RedHawk Linux 1 1 IPC RedHawk Linux POSIX System V /38
36 CPU RedHawk Linux 1. PID 1 RedHawk Linux POSIX System V 36/38
37 1 read/write POSIX System V RedHawk Linux SMP 1 2 CPU / CPU softirq System V Linux System V UNIX IPCSystem V IPC 3 System V 37/38
38 tasklet tasklet CPU workqueue softirq tasklet Linux work 38/38
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