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#1 2019-06-05 17:21:03

Michael
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注册时间: 2019-01-13
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荔枝派F1C100S RAM空间占用问题

如题,按理说芯片可用RAM总大小是32M,出去uboot和kernel及文件系统所占用空间,应该预留个20M没问题啊,但现在怎么设置都是在16M左右徘徊,求解。

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#2 2019-06-05 17:22:16

Michael
会员
注册时间: 2019-01-13
累计积分: 18

Re: 荔枝派F1C100S RAM空间占用问题

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.15.0-rc8-licheepi-nano+ (root@ubuntu) (gcc version 8.3.0 (Ubuntu/Linaro 8.3.0-6ubuntu1)) #6 Tue Jun 4 23:59:57 PDT 2019
[    0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
[    0.000000] CPU: VIVT data cache, VIVT instruction cache
[    0.000000] OF: fdt: Machine model: Lichee Pi Nano
[    0.000000] Memory policy: Data cache writeback
[    0.000000] random: fast init done
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 8128
[    0.000000] Kernel command line: console=ttyS0,115200 panic=5 rootwait root=/dev/mtdblock3 rw rootfstype=jffs2
[    0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Memory: 23752K/32768K available (5120K kernel code, 211K rwdata, 1140K rodata, 1024K init, 219K bss, 9016K reserved, 0K cma-reserved, 0K highmem)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0xc2800000 - 0xff800000   ( 976 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xc2000000   (  32 MB)
[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
[    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
[    0.000000]       .text : 0x(ptrval) - 0x(ptrval)   (6112 kB)
[    0.000000]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
[    0.000000]       .data : 0x(ptrval) - 0x(ptrval)   ( 212 kB)
[    0.000000]        .bss : 0x(ptrval) - 0x(ptrval)   ( 220 kB)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000038] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
[    0.000085] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[    0.000483] Console: colour dummy device 80x30
[    0.000558] Calibrating delay loop... 395.67 BogoMIPS (lpj=1978368)
[    0.120220] pid_max: default: 32768 minimum: 301
[    0.120442] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.120470] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.121528] CPU: Testing write buffer coherency: ok
[    0.122961] Setting up static identity map for 0x80100000 - 0x80100058
[    0.124745] devtmpfs: initialized
[    0.128738] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.128791] futex hash table entries: 256 (order: -1, 3072 bytes)
[    0.129003] pinctrl core: initialized pinctrl subsystem
[    0.130677] NET: Registered protocol family 16
[    0.131646] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.132880] cpuidle: using governor menu
[    0.147066] SCSI subsystem initialized
[    0.147314] usbcore: registered new interface driver usbfs
[    0.147420] usbcore: registered new interface driver hub
[    0.147573] usbcore: registered new device driver usb
[    0.147935] pps_core: LinuxPPS API ver. 1 registered
[    0.147954] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    0.147998] PTP clock support registered
[    0.149078] clocksource: Switched to clocksource timer
[    0.170437] NET: Registered protocol family 1
[    0.170785] NetWinder Floating Point Emulator V0.97 (double precision)
[    0.172114] Initialise system trusted keyrings
[    0.172596] workingset: timestamp_bits=30 max_order=13 bucket_order=0
[    0.181557] jffs2: version 2.2. (NAND) 漏 2001-2006 Red Hat, Inc.
[    0.192384] Key type asymmetric registered
[    0.192418] Asymmetric key parser 'x509' registered
[    0.192616] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[    0.192644] io scheduler noop registered
[    0.192657] io scheduler deadline registered
[    0.193214] io scheduler cfq registered (default)
[    0.193243] io scheduler mq-deadline registered
[    0.193255] io scheduler kyber registered
[    0.194038] sun4i-usb-phy 1c13400.phy: Couldn't request ID GPIO
[    0.200523] suniv-pinctrl 1c20800.pinctrl: initialized sunXi PIO driver
[    0.338478] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled
[    0.343819] console [ttyS0] disabled
[    0.364089] 1c25000.serial: ttyS0 at MMIO 0x1c25000 (irq = 23, base_baud = 6250000) is a 16550A
[    0.759867] console [ttyS0] enabled
[    0.767864] panel-simple panel: panel supply power not found, using dummy regulator
[    0.776824] SCSI Media Changer driver v0.25
[    0.783879] m25p80 spi0.0: w25q128 (16384 Kbytes)
[    0.788641] 4 ofpart partitions found on MTD device spi0.0
[    0.794218] Creating 4 MTD partitions on "spi0.0":
[    0.799022] 0x000000000000-0x000000100000 : "u-boot"
[    0.806106] 0x000000100000-0x000000110000 : "dtb"
[    0.812920] 0x000000110000-0x000000510000 : "kernel"
[    0.819922] 0x000000510000-0x000001000000 : "rootfs"
[    0.827587] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.834222] ehci-platform: EHCI generic platform driver
[    0.839714] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.845921] ohci-platform: OHCI generic platform driver
[    0.851503] usbcore: registered new interface driver usb-storage
[    0.858229] udc-core: couldn't find an available UDC - added [g_cdc] to list of pending drivers
[    0.867215] i2c /dev entries driver
[    0.872404] usbcore: registered new interface driver usbhid
[    0.877975] usbhid: USB HID core driver
[    0.882423] NET: Registered protocol family 17
[    0.888456] Loading compiled-in X.509 certificates
[    0.900734] sun4i-drm display-engine: bound 1e60000.display-backend (ops 0xc0636db8)
[    0.909456] sun4i-drm display-engine: bound 1c0c000.lcd-controller (ops 0xc063609c)
[    0.917113] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    0.923782] [drm] No driver support for vblank timestamp query.
[    0.972455] Console: switching to colour frame buffer device 60x34
[    0.995668] sun4i-drm display-engine: fb0:  frame buffer device
[    1.002695] [drm] Initialized sun4i-drm 1.0.0 20150629 for display-engine on minor 0
[    1.011563] usb_phy_generic usb_phy_generic.0.auto: usb_phy_generic.0.auto supply vcc not found, using dummy regulator
[    1.023278] musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver
[    1.029732] musb-hdrc musb-hdrc.1.auto: new USB bus registered, assigned bus number 1
[    1.039515] hub 1-0:1.0: USB hub found
[    1.043426] hub 1-0:1.0: 1 port detected
[    1.048535] using random self ethernet address
[    1.053112] using random host ethernet address
[    1.058771] usb0: HOST MAC e2:cc:43:3b:5d:37
[    1.063247] usb0: MAC 46:c7:2c:91:cb:ac
[    1.067188] g_cdc gadget: CDC Composite Gadget, version: King Kamehameha Day 2008
[    1.074774] g_cdc gadget: g_cdc ready
[    1.079436] vcc3v3: disabling
[    1.120487] random: crng init done
[    2.227303] VFS: Mounted root (jffs2 filesystem) on device 31:3.
[    2.235565] devtmpfs: mounted
[    2.243043] Freeing unused kernel memory: 1024K

# cat /proc/meminfo
MemTotal:          24776 kB
MemFree:           11992 kB
MemAvailable:      16908 kB
Buffers:               0 kB
Cached:             1284 kB
SwapCached:            0 kB
Active:             1512 kB
Inactive:             80 kB
Active(anon):        328 kB
Inactive(anon):        8 kB
Active(file):       1184 kB
Inactive(file):       72 kB
Unevictable:           0 kB
Mlocked:               0 kB
HighTotal:             0 kB
HighFree:              0 kB
LowTotal:          24776 kB
LowFree:           11992 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:           332 kB
Mapped:             1076 kB
Shmem:                28 kB
Slab:               9568 kB
SReclaimable:       6232 kB
SUnreclaim:         3336 kB
KernelStack:         192 kB
PageTables:           68 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:       12388 kB
Committed_AS:       1528 kB
VmallocTotal:     999424 kB
VmallocUsed:           0 kB
VmallocChunk:          0 kB

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#3 2019-06-05 17:23:27

Michael
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注册时间: 2019-01-13
累计积分: 18

Re: 荔枝派F1C100S RAM空间占用问题

不知道为啥 MemTotal:          24776 kB 这个一直都是24M左右

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#4 2019-06-05 18:13:34

晕哥
Administrator
注册时间: 2017-09-06
累计积分: 6,733

Re: 荔枝派F1C100S RAM空间占用问题

echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches


这三个命令都试一下, 看有没有变化.

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#5 2019-06-05 18:28:00

真的是很烦
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注册时间: 2018-10-08
累计积分: 92

Re: 荔枝派F1C100S RAM空间占用问题

24M 不是这个值?
Memory: 23752K/32768K available (5120K kernel code, 211K rwdata, 1140K rodata, 1024K init, 219K bss, 9016K reserved, 0K cma-reserved, 0K highmem

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#6 2019-06-06 16:57:58

Michael
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注册时间: 2019-01-13
累计积分: 18

Re: 荔枝派F1C100S RAM空间占用问题

晕哥 说:

echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches


这三个命令都试一下, 看有没有变化.


没啥变化,不知道怎样去降低RAM占用

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#7 2019-06-06 16:59:01

Michael
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注册时间: 2019-01-13
累计积分: 18

Re: 荔枝派F1C100S RAM空间占用问题

真的是很烦 说:

24M 不是这个值?
Memory: 23752K/32768K available (5120K kernel code, 211K rwdata, 1140K rodata, 1024K init, 219K bss, 9016K reserved, 0K cma-reserved, 0K highmem

用这个计算来看确实是占用了16M左右的空间,有啥方法提升可用RAM空间么?

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#8 2019-06-06 17:05:08

smartcar
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注册时间: 2018-02-19
累计积分: 299

Re: 荔枝派F1C100S RAM空间占用问题

去掉一些不必要的驱动和文件系统,把kernel变小,可以省出一些Text段占用的RAM

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#9 2019-06-10 20:15:25

zhenfanhei
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注册时间: 2018-01-18
累计积分: 222
个人网站

Re: 荔枝派F1C100S RAM空间占用问题

用f1c200s吧,内存大一倍,基本应用应该没问题

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