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您好, 在使用OMAPL138 evm过程中,我使用了MessageQ和ringIO来传输数据。利用ipcs -l ,情况如下:7 v# O" R4 R3 p" t+ T5 E4 c% D) s
root@tl:~# ipcs -l# [) v ]+ G2 ~: V& ?
9 Z4 a* |. P0 _+ d! u% Q------ Shared Memory Limits --------" o! C! e: J4 b+ f1 N
max number of segments = 40963 Q0 [3 {% E2 W ^" I2 T; Z
max seg size (kbytes) = 327680 _# R6 S% D# e7 Q# A
max total shared memory (kbytes) = 8388608
6 g+ }* W1 H: |* `& C) [min seg size (bytes) = 1/ U* ?" j& z8 K" f9 T1 t
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------ Semaphore Limits --------
5 Y; |0 P% g N# @6 d1 emax number of arrays = 128* e( H* P9 c8 O0 d) z$ m( O: Y
max semaphores per array = 250
* K2 L+ t$ v* @$ t; F' c5 h/ @. smax semaphores system wide = 32000
2 W# t5 ^5 d5 Q) ]* vmax ops per semop call = 321 \9 N& Y- E6 ]
semaphore max value = 32767
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9 H; O; l8 X- o, C( f' P: ~------ Messages Limits --------
5 L: N' `3 a5 @max queues system wide = 178) q& b0 o# M5 y# Y2 W" k, f5 F8 @# C
max size of message (bytes) = 8192
) \6 Q3 B% K" \2 Zdefault max size of queue (bytes) = 16384
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但是,用ipcs -a u( l. `6 l) w& C, _
root@tl:~# ipcs -a
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------ Shared Memory Segments --------
4 @8 r* X9 H4 _0 Z4 skey shmid owner perms bytes nattch status
9 ^' u+ a; y w& u1 }5 q' y/ p0x00000000 0 root 600 1024 1 dest
3 ~) A7 T+ Q2 B! I) [0x00000000 196609 root 600 1024 1 dest
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------ Semaphore Arrays --------
+ t6 h2 y5 [5 g$ q6 O2 jkey semid owner perms nsems . U& k r w4 J
0x6411074d 0 root 600 1 6 x: A, i1 ]. ]) U4 y3 L
0x64110957 163841 root 600 1
5 k- D0 f: ?. `- D1 C0x641109a1 196610 root 600 1 7 P3 J4 V A9 [% _
5 m# W8 s- w9 _, z- C------ Message Queues --------, K0 j8 ]' {4 o) S: y) R
key msqid owner perms used-bytes messages 8 W& c+ d1 X4 t5 q$ _$ s
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4 k n* ^5 M5 E1 G请问,我的共享内存使用大小为 (float *)ring_buffer_acquired(ad->buffer, 2320 * sizeof(float)*18); 远大于1024BYTE ,请问为什么?
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