optimize kernel run times

jimaxun — Fri, 06 Jul 2018 09:48:34 GMT

Hello:

we use imx8qxp board, when optimize kernel find some questions，

1- uboot startup over ,we set gpio 1

2-kernel startup over and before load init.rc ,we set gpio 0

by test gpio time is 1.04s

but: by cat log 534ms before startup init.rc,

I don't know about 400ms times Where does it cost,

[ 0.000000] start kernel --------------------------

[ 0.000000] start kerneli222222222222 --------------------------

[ 0.000000] Booting Linux on physical CPU 0x0

[ 0.000000] Linux version 4.9.51 (jyc@jyc) (gcc version 6.2.0 (GCC) ) #23 SMP PREEMPT Fri Jul 6 14:38:26 8

[ 0.000000] Boot CPU: AArch64 Processor [410fd041]

[ 0.000000] earlycon: lpuart32 at MMIO 0x000000005a060000 (options '115200,115200')

[ 0.000000] bootconsole [lpuart32] enabled

[ 0.000000] OF: reserved mem: failed to allocate memory for node 'linux,cma'

[ 0.000000] cma: Reserved 320 MiB at 0x00000000ec000000

[ 0.000000] On node 0 totalpages: 784128

[ 0.000000] DMA zone: 8184 pages used for memmap

[ 0.000000] DMA zone: 0 pages reserved

[ 0.000000] DMA zone: 521984 pages, LIFO batch:31

[ 0.000000] Normal zone: 4096 pages used for memmap

[ 0.000000] Normal zone: 262144 pages, LIFO batch:31

[ 0.000000] psci: probing for conduit method from DT.

[ 0.000000] psci: PSCIv1.0 detected in firmware.

[ 0.000000] psci: Using standard PSCI v0.2 function IDs

[ 0.000000] psci: MIGRATE_INFO_TYPE not supported.

[ 0.000000] percpu: Embedded 21 pages/cpu @ffff80083ff54000 s47896 r8192 d29928 u86016

[ 0.000000] pcpu-alloc: s47896 r8192 d29928 u86016 alloc=21*4096

[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3

[ 0.000000] Detected VIPT I-cache on CPU0

[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 771848

[ 0.000000] Kernel command line: console=ttyLP0,115200 earlycon=lpuart32,0x5a060000,115200,115200 android2

[ 0.000000] log_buf_len individual max cpu contribution: 4096 bytes

[ 0.000000] log_buf_len total cpu_extra contributions: 12288 bytes

[ 0.000000] log_buf_len min size: 16384 bytes

[ 0.000000] log_buf_len: 32768 bytes

[ 0.000000] early log buf free: 14412(87%)

[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)

[ 0.000000] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)

[ 0.000000] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)

[ 0.000000] software IO TLB [mem 0xe7fff000-0xebfff000] (64MB) mapped at [ffff800067fff000-ffff80006bffef]

[ 0.000000] Memory: 2545080K/3136512K available (6270K kernel code, 458K rwdata, 2276K rodata, 384K init,)

[ 0.000000] Virtual kernel memory layout:

[ 0.000000] modules : 0xffff000000000000 - 0xffff000008000000 ( 128 MB)

[ 0.000000] vmalloc : 0xffff000008000000 - 0xffff7dffbfff0000 (129022 GB)

[ 0.000000] .text : 0xffff000008080000 - 0xffff0000086a0000 ( 6272 KB)

[ 0.000000] .rodata : 0xffff0000086a0000 - 0xffff0000088e0000 ( 2304 KB)

[ 0.000000] .init : 0xffff0000088e0000 - 0xffff000008940000 ( 384 KB)

[ 0.000000] .data : 0xffff000008940000 - 0xffff0000089b2808 ( 459 KB)

[ 0.000000] .bss : 0xffff0000089b2808 - 0xffff0000089f5b04 ( 269 KB)

[ 0.000000] fixed : 0xffff7dfffe7fd000 - 0xffff7dfffec00000 ( 4108 KB)

[ 0.000000] PCI I/O : 0xffff7dfffee00000 - 0xffff7dffffe00000 ( 16 MB)

[ 0.000000] vmemmap : 0xffff7e0000000000 - 0xffff800000000000 ( 2048 GB maximum)

[ 0.000000] 0xffff7e0000008000 - 0xffff7e0021000000 ( 527 MB actual)

[ 0.000000] memory : 0xffff800000200000 - 0xffff800840000000 ( 33790 MB)

[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1

[ 0.000000] Preemptible hierarchical RCU implementation.

[ 0.000000] Build-time adjustment of leaf fanout to 64.

[ 0.000000] RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=4.

[ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=4

[ 0.000000] NR_IRQS:64 nr_irqs:64 0

[ 0.000000] GICv3: GIC: Using split EOI/Deactivate mode

[ 0.000000] GICv3: CPU0: found redistributor 0 region 0:0x0000000051b00000

[ 0.000000] arm_arch_timer: Architected cp15 timer(s) running at 8.00MHz (phys).

[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x1d854df40, max_idle_ns: 4s

[ 0.000004] sched_clock: 56 bits at 8MHz, resolution 125ns, wraps every 2199023255500ns

[ 0.000289] Calibrating delay loop (skipped), value calculated using timer frequency.. 16.00 BogoMIPS (lp)

[ 0.000300] pid_max: default: 32768 minimum: 301

[ 0.000366] Security Framework initialized

[ 0.000409] Mount-cache hash table entries: 8192 (order: 4, 65536 bytes)

[ 0.000417] Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes)

[ 0.001096] --------------rest_init---------

[ 0.001304] ASID allocator initialised with 65536 entries

[ 0.032122] *****Initialized MU

[ 0.032143] ***** imx8_init_pm_domains *****

[ 0.032874] CPU identified as i.MX8QXP, silicon rev 1.0

[ 0.080431] Detected VIPT I-cache on CPU1

[ 0.080460] GICv3: CPU1: found redistributor 1 region 0:0x0000000051b20000

[ 0.080489] CPU1: Booted secondary processor [410fd041]

[ 0.080560] Brought up 2 CPUs

[ 0.080573] SMP: Total of 2 processors activated.

[ 0.080580] CPU features: detected feature: GIC system register CPU interface

[ 0.080590] CPU features: detected feature: 32-bit EL0 Support

[ 0.080630] CPU: All CPU(s) started at EL2

[ 0.080909] ---------------do_basic_setup-------

[ 0.081177] devtmpfs: initialized

[ 0.091853] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 s

[ 0.091874] futex hash table entries: 1024 (order: 5, 131072 bytes)

[ 0.099636] pinctrl core: initialized pinctrl subsystem

[ 0.100726] NET: Registered protocol family 16

[ 0.112673] cpuidle: using governor menu

[ 0.113516] vdso: 2 pages (1 code @ ffff0000086a7000, 1 data @ ffff000008944000)

[ 0.113533] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.

[ 0.117545] DMA: preallocated 256 KiB pool for atomic allocations

[ 0.119288] MU and Power domains initialized

[ 0.119303] ***** imx8qxp_clocks_init *****

[ 0.174498] i.MX8QXP clk 168: register failed with -19

[ 0.174511] i.MX8QXP clk 169: register failed with -19

[ 0.175377] imx8qxp-pinctrl iomuxc: initialized IMX pinctrl driver

[ 0.188980] 5b100000.usbphy supply phy-3p0 not found, using dummy regulator

[ 0.209207] HugeTLB registered 2 MB page size, pre-allocated 0 pages

[ 0.210203] GPIO line 491 (lvds0_panel_pwr_en) hogged as output/high

[ 0.210218] GPIO line 507 (soc_off_rdy) hogged as output/high

[ 0.211313] GPIO line 474 (lvds0_panel_reset) hogged as output/high

[ 0.211325] GPIO line 476 (lvds0_panel_stbyb) hogged as output/high

[ 0.211336] GPIO line 475 (lvds0_panel_pwm) hogged as output/high

[ 0.211347] GPIO line 461 (peri_3v3_sw) hogged as output/high

[ 0.211360] GPIO line 462 (peri_1v8_sw) hogged as output/high

[ 0.213525] GPIO line 408 (ipod_psw) hogged as output/high

[ 0.228548] mxs-dma 5b810000.dma-apbh: initialized

[ 0.230681] SCSI subsystem initialized

[ 0.231064] usbcore: registered new interface driver usbfs

[ 0.231147] usbcore: registered new interface driver hub

[ 0.231246] usbcore: registered new device driver usb

[ 0.231444] usbphynop1 supply vcc not found, using dummy regulator

[ 0.232467] media: Linux media interface: v0.10

[ 0.232536] Linux video capture interface: v2.00

[ 0.233679] MU is ready for cross core communication!

[ 0.234885] virtio_rpmsg_bus virtio0: rpmsg host is online

[ 0.235112] imx rpmsg driver is registered.

[ 0.235321] Advanced Linux Sound Architecture Driver Initialized.

[ 0.236172] clocksource: Switched to clocksource arch_sys_counter

[ 0.236318] VFS: Disk quotas dquot_6.6.0

[ 0.236371] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)

[ 0.238168] NET: Registered protocol family 2

[ 0.238617] TCP established hash table entries: 32768 (order: 6, 262144 bytes)

[ 0.238908] TCP bind hash table entries: 32768 (order: 7, 524288 bytes)

[ 0.239397] TCP: Hash tables configured (established 32768 bind 32768)

[ 0.239460] UDP hash table entries: 2048 (order: 4, 65536 bytes)

[ 0.239543] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes)

[ 0.239747] NET: Registered protocol family 1

[ 0.239983] Unpacking initramfs...

[ 0.290333] Freeing initrd memory: 908K

[ 0.290709] hw perfevents: enabled with armv8_pmuv3 PMU driver, 7 counters available

[ 0.293800] workingset: timestamp_bits=46 max_order=20 bucket_order=0

[ 0.307142] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)

[ 0.307158] io scheduler noop registered

[ 0.307318] io scheduler cfq registered (default)

[ 0.307372] LinuxCrashDump[Debug]: Init the linux crash dump driver

[ 0.307452] LinuxCrashDump[Debug]: Probe the linux crash dump driver

[ 0.307544] LinuxCrashDump[Debug]: get reserved memory, paddr: 0x9FD00000, vaddr: 0xFFFF00000B800000, siz0

[ 0.307833] LinuxCrashDumpDebugModule: linux crash dump physical address=0x9fd00000,size=0x300000,virtual0

[ 0.311676] 5a060000.serial: ttyLP0 at MMIO 0x5a060000 (irq = 49, base_baud = 5000000) is a FSL_LPUART

[ 0.313819] console [ttyLP0] enabled

[ 0.313826] bootconsole [lpuart32] disabled

[ 0.314074] fsl-lpuart 5a060000.serial: NO DMA tx channel, run at cpu mode

[ 0.314083] fsl-lpuart 5a060000.serial: NO DMA rx channel, run at cpu mode

[ 0.314338] SPI driver initialize successful! .

[ 0.333073] imx8-dpr-channel 560d0000.dpr-channel: Linked as a consumer to 56040000.prg

[ 0.335176] imx8-dpr-channel 560e0000.dpr-channel: Linked as a consumer to 56050000.prg

[ 0.337274] imx8-dpr-channel 560f0000.dpr-channel: Linked as a consumer to 56060000.prg

[ 0.339399] imx8-dpr-channel 56100000.dpr-channel: Linked as a consumer to 56070000.prg

[ 0.339420] imx8-dpr-channel 56100000.dpr-channel: Linked as a consumer to 56080000.prg

[ 0.341510] imx8-dpr-channel 56110000.dpr-channel: Linked as a consumer to 56090000.prg

[ 0.341531] imx8-dpr-channel 56110000.dpr-channel: Linked as a consumer to 560a0000.prg

[ 0.343630] imx8-dpr-channel 56120000.dpr-channel: Linked as a consumer to 560b0000.prg

[ 0.343650] imx8-dpr-channel 56120000.dpr-channel: Linked as a consumer to 560c0000.prg

[ 0.346473] dpu-core 56180000.dpu: Linked as a consumer to 56100000.dpr-channel

[ 0.346507] dpu-core 56180000.dpu: Linked as a consumer to 56110000.dpr-channel

[ 0.346855] dpu-core 56180000.dpu: driver probed

[ 0.347101] [drm] Initialized

[ 0.348743] lvds1_panel supply power not found, using dummy regulator

[ 0.350142] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).

[ 0.350150] [drm] No driver support for vblank timestamp query.

[ 0.350272] imx-drm display-subsystem: bound imx-drm-dpu-bliteng.2 (ops dpu_bliteng_ops)

[ 0.350283] imx-dpu-crtc imx-dpu-crtc.0: dpu_crtc_init, stream_id=0

[ 0.350567] imx-drm display-subsystem: bound imx-dpu-crtc.0 (ops dpu_crtc_ops)

[ 0.350578] imx-dpu-crtc imx-dpu-crtc.1: dpu_crtc_init, stream_id=1

[ 0.350811] imx-drm display-subsystem: bound imx-dpu-crtc.1 (ops dpu_crtc_ops)

[ 0.350965] imx-ldb ldb@562210e0: no ddc available

[ 0.351028] imx-ldb ldb@562210e0: find phy 3a87a000 for channel 0

[ 0.351091] imx-ldb ldb@562210e0: dual-channel mode

[ 0.351102] imx-ldb ldb@562210e0: i=1, imx_ldb=3a5e7018, imx_regmap=3a3fb800, imx_regmap_slave=3a3fbc00

[ 0.351154] imx-ldb ldb@562210e0: find phy 3a87a400 for channel 1

[ 0.351223] imx-drm display-subsystem: bound ldb@562210e0 (ops imx_ldb_ops)

[ 0.353944] imx-drm display-subsystem: fb0: frame buffer device

[ 0.363162] loop: module loaded

[ 0.363787] slram: not enough parameters.

[ 0.364430] fsl_lpspi 5a020000.lpspi: [fsl_lpspi_probe 607] spi-slave-mode

[ 0.364636] fsl_lpspi 5a020000.lpspi: [fsl_lpspi_probe 623] gpio_req: 466

[ 0.365087] spi spi0.0: fsl_lpspi_setup: mode 0, 8 bpw, 20000000 hz

[ 0.365458] spidev_probe : 831 : spi-slave-mode

[ 0.365473] fsl_lpspi 5a020000.lpspi: lpspi probed

[ 0.365893] libphy: Fixed MDIO Bus: probed

[ 0.365996] usbcore: registered new interface driver cdc_ncm

[ 0.366658] usbcore: registered new interface driver usb-storage

[ 0.367170] imx_sc_rtc rtc: rtc core: registered rtc as rtc0

[ 0.367334] i2c /dev entries driver

[ 0.369752] mx8-img-md: Registered mxc_isi.0.capture as /dev/video0

[ 0.369923] mx8-img-md: Registered mxc_isi.1.capture as /dev/video1

[ 0.370080] mx8-img-md: Registered mxc_isi.2.capture as /dev/video2

[ 0.370233] mx8-img-md: Registered mxc_isi.3.capture as /dev/video3

[ 0.370976] mxc-jpeg 58400000.jpegdec: decoder device registered as /dev/video4 (81,4)

[ 0.371427] mxc-jpeg 58450000.jpegenc: encoder device registered as /dev/video5 (81,5)

[ 0.373719] sdhci: Secure Digital Host Controller Interface driver

[ 0.373728] sdhci: Copyright(c) Pierre Ossman

[ 0.373734] sdhci-pltfm: SDHCI platform and OF driver helper

[ 0.374930] *****************sdhci_pltfm_init*****************

[ 0.420199] mmc0: SDHCI controller on 5b010000.usdhc [5b010000.usdhc] using ADMA

[ 0.426490] galcore 80000000.imx8_gpu_ss: bound 53100000.gpu (ops mxc_gpu_sub_ops)

[ 0.426809] Galcore version 6.2.4.138003

[ 0.504814] ashmem: initialized

[ 0.505040] logger: created 256K log 'log_main'

[ 0.505199] logger: created 256K log 'log_events'

[ 0.505354] logger: created 256K log 'log_radio'

[ 0.505506] logger: created 256K log 'log_system'

[ 0.505561] mmc0: new DDR MMC card at address 0001

[ 0.507736] NET: Registered protocol family 26

[ 0.508534] NET: Registered protocol family 10

[ 0.509231] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver

[ 0.509802] NET: Registered protocol family 17

[ 0.509830] Key type dns_resolver registered

[ 0.510413] mmcblk0: mmc0:0001 064G32 58.2 GiB

[ 0.510589] mmcblk0boot0: mmc0:0001 064G32 partition 1 8.00 MiB

[ 0.510744] mmcblk0boot1: mmc0:0001 064G32 partition 2 8.00 MiB

[ 0.510895] mmcblk0rpmb: mmc0:0001 064G32 partition 3 4.00 MiB

[ 0.511594] registered taskstats version 1

[ 0.512108] mmcblk0: p1 p2

[ 0.529254] imx8_cpufreq_init: cluster 0 running at freq 1200 MHz, suspend freq 1200 MHz

[ 0.529838] imx_sc_rtc rtc: setting system clock to 1970-01-01 00:31:56 UTC (1916)

[ 0.531835] SD1_SPWR: disabling

[ 0.531844] ALSA device list:

[ 0.531848] No soundcards found.

[ 0.534182] Freeing unused kernel memory: 384K

[ 0.536690] (EE) init: /init.rc: 392: invalid option 'seclabel'

[ 0.536723] (EE) init: /init.rc: 393: invalid option 'seclabel'

[ 0.536931] init (1): /proc/1/oom_adj is deprecated, please use /proc/1/oom_score_adj instead.

[ 0.536966] (!!) init: starting 'ueventd'

[ 0.579877] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode. Opts: journal_checksum

[ 0.579961] (!!) init: processing action 0x1c850fa0 (wait_for_coldboot_done)

[ 0.590136] (!!) init: processing action 0x1c851030 (property_init)

[ 0.590528] (!!) init: processing action 0x1c8510c0 (keychord_init)

[ 0.590546] (!!) init: processing action 0x1c851150 (console_init)

[ 0.590668] (!!) init: processing action 0x1c8511e0 (set_init_properties)

[ 0.590709] (!!) init: processing action 0x1c84c8e0 (init)

[ 0.591988] (EE) init: command 'write /dev/cpuctl/cpu.shares 1024', r=-22

[ 0.599918] EXT4-fs (mmcblk0p2): recovery complete

[ 0.600356] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: nodelalloc,journal_checm

[ 0.610680] (II) linuxcrashdump: main() start Dump ==

[ 0.610722] (II) linuxcrashdump: main() /proc/linux_crash_dump not exist do nothing ==

[ 0.611335] (II) init: mount /system success

[ 0.611346] (II) init: /system mount OK at the end

[ 0.611437] (II) init: mount /var success

[ 0.611624] (II) init: /var mount OK at the end

[ 0.654905] random: fast init done

[ 0.926566] binder: 1062:1062 unknown command 1074815758

[ 0.926582] binder: 1062:1062 ioctl c0306201 ffffe532ad90 returned -22

[ 1.164695] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

[ 1.254265] 5b0d0200.usbmisc supply vbus-wakeup not found, using dummy regulator

[ 1.270421] 5b0d0000.usb supply vbus not found, using dummy regulator

[ 1.279540] ci_hdrc ci_hdrc.0: EHCI Host Controller

[ 1.279566] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1

[ 1.296205] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00

[ 1.297135] hub 1-0:1.0: USB hub found

[ 1.297172] hub 1-0:1.0: 1 port detected

[ 1.380675] imx-ldb ldb@562210e0: imx_ldb_encoder_atomic_mode_set

[ 1.380694] imx-ldb ldb@562210e0: imx_ldb_set_clock

[ 1.401844] imx-ldb ldb@562210e0: imx_ldb_encoder_enable

[ 1.508224] imx-ldb ldb@562210e0: before write, ldb->ldb_ctrl=50000b5, ldb->ldb_ctrl_slave=150000b5

[ 1.508251] imx-ldb ldb@562210e0: after write, ldb->ldb_ctrl=b5, ldb->ldb_ctrl_slave=100000b5

[ 1.510324] dpu_pixel_link_validate

[ 1.624201] usb 1-1: new high-speed USB device number 2 using ci_hdrc

[ 1.818415] usb-storage 1-1:1.0: USB Mass Storage device detected

[ 1.819856] scsi host0: usb-storage 1-1:1.0

Re: optimize kernel run times

igorpadykov — Wed, 11 Jul 2018 23:32:17 GMT

Hi 越超贾

i.MX8QXP processor is not publicly released and not supported yet,

its software still in development stage, most latest releases can be found on below link

Alpha / Beta BSPs for Microprocessors|NXP

Best regards
igor
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