Date: Sat, 6 Nov 2021 12:58:34 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: arm@FreeBSD.org Subject: huge emmc speed regression Message-ID: <812ab31a-ce6e-d8ac-3539-39e6b20a01df@FreeBSD.org>
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Upfront, I haven't tested the latest main / current yet. I should really test it but that's porbably for the next weekend. I see a huge emmc speed difference between the current from April 2021 and September 2021 (commit 5e79bba562bc303eed669dbd0d391b6c6a9c289b) on Orange Pi PC Plus using on-board eMMC card. I use MMCCAM in both cases. In the old environment I see expected read speeds (with sequential dd) of around 40 MB/s. In the new environment the speeds are around 300 KB/s (like a very good floppy disk of old). Some info from the old environment: # camcontrol mmcsdcmd 2:0:0 -I Host controller information Host OCR: 0x300000 Min frequency: 400 KHz Max frequency: 52 MHz Supported bus width: 4 bit 8 bit Supported operating modes: Can do High Speed transfers Supported VCCQ voltages: 3.3V Current settings: Bus width: 8 bit Freq: 52.000 MHz (high-speed timing) VCCQ: 1.2V Same command in the new environment looks a bit strange: # camcontrol mmcsdcmd 2:0:0 -I Host controller information Host OCR: 0x300000 Min frequency: 400 KHz Max frequency: 0 MHz Supported bus width: 4 bit 8 bit Supported operating modes: Can do High Speed transfers Supported VCCQ voltages: 3.3V Current settings: Bus width: 8 bit Freq: 0.000 MHz VCCQ: 1.2V Also, in the old dmesg I see: aw_mmc2: <Allwinner Integrated MMC/SD controller> mem 0x1c11000-0x1c11fff irq 12 on simplebus0 aw_mmc2: vmmc-supply regulator found aw_mmc2: Non-removable media aw_mmc2: Clock => 0 aw_mmc2: VDD => 21 aw_mmc2: CS => 0 aw_mmc2: Bus width => 0 aw_mmc2: Power mode => 1 aw_mmc2: Bus mode => 1 aw_mmc2: Powering up sd/mmc aw_mmc2: Clock => 400000 aw_mmc2: Timing => 0 aw_mmc2: CS => 1 aw_mmc2: Bus mode => 2 aw_mmc2: Timing => 1 aw_mmc2: Clock => 52000000 aw_mmc2: Bus width => 3 While in the new: aw_mmc2: <Allwinner Integrated MMC/SD controller> mem 0x1c11000-0x1c11fff irq 12 on simplebus0 aw_mmc2: vmmc-supply regulator found aw_mmc2: Non-removable media aw_mmc2: Power mode => 0 aw_mmc2: Powering down sd/mmc aw_mmc2: Clock => 0 aw_mmc2: VDD => 21 aw_mmc2: CS => 0 aw_mmc2: Bus width => 0 aw_mmc2: Power mode => 1 aw_mmc2: Bus mode => 1 aw_mmc2: Powering up sd/mmc aw_mmc2: Clock => 400000 aw_mmc2: Power mode => 2 aw_mmc2: Timing => 0 aw_mmc2: CS => 1 aw_mmc2: Bus mode => 2 aw_mmc2: Clock => 0 aw_mmc2: Bus width => 3 So, at the end of the sequence we have Clock => 0 instead of Clock => 52000000 and Timing => 1 is missing... -- Andriy Gapon
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