Date: Thu, 24 Aug 2017 14:52:04 -0700 From: Adrian Chadd <adrian.chadd@gmail.com> To: Mori Hiroki <yamori813@yahoo.co.jp> Cc: "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org> Subject: Re: performance by endian Message-ID: <CAJ-Vmok=usxP9=QkBZ1khxqBztvwpp4qeysTHQ6E64o-HfDD6g@mail.gmail.com> In-Reply-To: <2796.80438.qm@web101711.mail.ssk.yahoo.co.jp> References: <319927.83012.qm@web101708.mail.ssk.yahoo.co.jp> <CAJ-VmomwtjgPjR-1GLsbXm7g%2Bxo5Mf1CMnXcqXED_-_vgWdsWA@mail.gmail.com> <539086.28647.qm@web101720.mail.ssk.yahoo.co.jp> <CAJ-Vmo=fkYZ=FZrisrjZ9W=MFJd85z=UiEQBBF-j8SVx=PLnvA@mail.gmail.com> <2796.80438.qm@web101711.mail.ssk.yahoo.co.jp>
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Hi,
1c is DQS delay tap control byte 0 (DDR D0..D7); 20 is DQS delay tap
control byte 1 (DDR D8..D15.)
0xf is:
4:0 TAP_L 0x5 Tap setting for lower 32-level delay chain for both registers=
.
It's to do with DDR timing. We'd have to look at the DDR2 chip and the
config path to see what the appropriate values are.
-adrian
On 23 August 2017 at 21:27, Mori Hiroki <yamori813@yahoo.co.jp> wrote:
> Hi
>
> AR9331 is ONION OMEGA. This module have Winbond W9751G6KB
> DDR2 memory.
>
>
> I checked AR9331 DDR TAP register at boot time.
>
> TAP_CONTROL_0(0x1800001c) =3D 0xf
> TAP_CONTROL_1(0x18000020) =3D 0x10 of 0xf
>
> I think this is ar7240_ddr_ap_init() result in u-boot code.
>
> I don't know what is TAP. But is this relation to this
> problem ?
>
> Hiroki Mori
>
> ----- Original Message -----
>> From: Adrian Chadd <adrian.chadd@gmail.com>
>> To: Mori Hiroki <yamori813@yahoo.co.jp>
>> Cc: "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org>
>> Date: 2017/8/15, Tue 06:10
>> Subject: Re: performance by endian
>>
>> hm, which DDR bus does it have?
>>
>>
>>
>> -adrian
>>
>>
>> On 25 July 2017 at 19:09, Mori Hiroki <yamori813@yahoo.co.jp> wrote:
>>> Hi
>>>
>>>
>>> Sorry I talk about AR9331 soc.
>>>
>>> I check boot log.
>>>
>>> RT3050 is this.
>>>
>>>
>>> Cache info:
>>> picache_stride =3D 4096
>>> picache_loopcount =3D 8
>>> pdcache_stride =3D 4096
>>> pdcache_loopcount =3D 4
>>> cpu0: MIPS Technologies processor v76.150
>>> MMU: Standard TLB, 32 entries (4K 16K 64K 256K 1M 16M 64M 256M pg si=
zes)
>>> L1 i-cache: 4 ways of 256 sets, 32 bytes per line
>>> L1 d-cache: 4 ways of 128 sets, 32 bytes per line
>>> L2 cache: disabled
>> Config1=3D0xbea3319e<PerfCount,WatchRegs,MIPS16,EJTAG>
>>> Config2=3D0x80000000
>>> Config3=3D0x420
>>>
>>> AR9331 is this.
>>>
>>> Cache info:
>>> picache_stride =3D 4096
>>> picache_loopcount =3D 16
>>> pdcache_stride =3D 4096
>>> pdcache_loopcount =3D 8
>>> max line size =3D 32
>>> cpu0: MIPS Technologies processor v116.147
>>> MMU: Standard TLB, 16 entries (4K 16K 64K 256K 1M 16M 64M 256M pg si=
zes)
>>> L1 i-cache: 4 ways of 512 sets, 32 bytes per line
>>> L1 d-cache: 4 ways of 256 sets, 32 bytes per line
>>> L2 cache: disabled
>>> Config1=3D0x9ee3519e<PerfCount,WatchRegs,MIPS16,EJTAG>
>>> Config2=3D0x80000000
>>> Config3=3D0x20
>>> Config7=3D0x0
>>>
>>> I seem AR9331 have more cache than RT3050.
>>>
>>> awk script is this.
>>>
>>> BEGIN {
>>> printf "%d=C2=A5n", fib(32)
>>> }
>>>
>>> function fib(n) {
>>> if (n < 2) return n
>>> return fib(n - 2) + fib(n - 1)
>>> }
>>>
>>> ----- Original Message -----
>>>> From: Adrian Chadd <adrian.chadd@gmail.com>
>>>> To: Mori Hiroki <yamori813@yahoo.co.jp>
>>>> Cc: "freebsd-mips@freebsd.org"
>> <freebsd-mips@freebsd.org>
>>>> Date: 2017/7/26, Wed 02:14
>>>> Subject: Re: performance by endian
>>>>
>>>> well, how much cache, how much out-of-order is it? The AR9330 SoC has
>>>> very limited cache :(
>>>>
>>>>
>>>>
>>>> -adrian
>>>>
>>>>
>>>> On 24 July 2017 at 00:53, Mori Hiroki <yamori813@yahoo.co.jp>
>> wrote:
>>>>> Hi.
>>>>>
>>>>> I checked fib(32) by awk script.
>>>>>
>>>>> RT3050 is 80 sec
>>>>> AR9330 is 99 sec
>>>>>
>>>>>
>>>>> AR9330 is newer and clock is hight. But slow.
>>>>>
>>>>> Why this result ?
>>>>>
>>>>> I suspect this is endian issue.
>>>>>
>>>>> I have problem mruby performance at Atheros SOC.
>>>>> It is slow almost double from same clock little
>>>>> endian mips soc.
>>>>>
>>>>> Regards
>>>>>
>>>>> Hiroki Mori
>>>>> _______________________________________________
>>>>> freebsd-mips@freebsd.org mailing list
>>>>> https://lists.freebsd.org/mailman/listinfo/freebsd-mips
>>>>> To unsubscribe, send any mail to
>>>> "freebsd-mips-unsubscribe@freebsd.org"
>>>>
>>
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