Groups > linux.debian.kernel > #55021 > unrolled thread

Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0

Started by	Yuri D'Elia <wavexx@thregr.org>
First post	2016-09-05 12:40 +0200
Last post	2016-11-03 16:10 +0100
Articles	4 — 3 participants

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  Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0 Yuri D'Elia <wavexx@thregr.org> - 2016-09-05 12:40 +0200
    Processed: Re: Bug#836734: Considerable I/O performance  regression on Lenovo Carbon X1 with 4.7.0 owner@bugs.debian.org (Debian Bug Tracking System) - 2016-11-02 21:20 +0100
    Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0 Salvatore Bonaccorso <carnil@debian.org> - 2016-11-02 21:20 +0100
      Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0 Yuri D'Elia <wavexx@thregr.org> - 2016-11-03 16:10 +0100

#55021 — Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0

From	Yuri D'Elia <wavexx@thregr.org>
Date	2016-09-05 12:40 +0200
Subject	Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0
Message-ID	<sdZtM-2y1-21@gated-at.bofh.it>

Package: src:linux
Version: 4.7.2-1
Severity: normal

I'm using a Carbon X1 (3rd gen). Compared to the latest 4.6 kernel, this image
has a significant performance regression in all I/O related operations.

Just as a ballpark, 4.6.0-1 can boot in generally less than 3 seconds after the
grub screen. With 4.7.0-1, it takes over 10.

I'm unsure at what exactly look for, as it could also be related to many
subsystems (I'm using an ext4 fs in an encrypted volume).

-- Package-specific info:
** Version:
Linux version 4.7.0-1-amd64 (debian-kernel@lists.debian.org) (gcc version 5.4.1 20160803 (Debian 5.4.1-1) ) #1 SMP Debian 4.7.2-1 (2016-08-28)

** Command line:
BOOT_IMAGE=/vmlinuz-4.7.0-1-amd64 root=/dev/mapper/eab16011nb--vg-root ro quiet

** Tainted: OE (12288)
 * Out-of-tree module has been loaded.
 * Unsigned module has been loaded (currently expected).

** Kernel log:
[   11.622772] iwlwifi 0000:04:00.0: firmware: failed to load iwlwifi-7265D-17.ucode (-2)
[   11.622847] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7265D-17.ucode failed with error -2
[   11.625002] iwlwifi 0000:04:00.0: firmware: direct-loading firmware iwlwifi-7265D-16.ucode
[   11.625334] iwlwifi 0000:04:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[   11.642592] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 7265, REV=0x210
[   11.644390] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   11.644830] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   11.669474] intel_rapl: Found RAPL domain package
[   11.669478] intel_rapl: Found RAPL domain core
[   11.669481] intel_rapl: Found RAPL domain uncore
[   11.669483] intel_rapl: Found RAPL domain dram
[   11.676332] [drm] Memory usable by graphics device = 4096M
[   11.676342] [drm] Replacing VGA console driver
[   11.676914] Console: switching to colour dummy device 80x25
[   11.682301] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[   11.682304] [drm] Driver supports precise vblank timestamp query.
[   11.682538] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[   11.720562] ACPI: Video Device [VID] (multi-head: yes  rom: no  post: no)
[   11.720990] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input16
[   11.723454] usb 1-7: USB disconnect, device number 5
[   11.724809] systemd-journald[1407]: Received request to flush runtime journal from PID 1
[   11.727172] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[   11.783316] EXT4-fs (sda1): mounting ext2 file system using the ext4 subsystem
[   11.950560] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[   11.950567] [drm] Initialized i915 1.6.0 20160425 for 0000:00:02.0 on minor 0
[   11.951760] fbcon: inteldrmfb (fb0) is primary device
[   11.958763] Bluetooth: Core ver 2.21
[   11.958777] NET: Registered protocol family 31
[   11.958777] Bluetooth: HCI device and connection manager initialized
[   11.958780] Bluetooth: HCI socket layer initialized
[   11.958783] Bluetooth: L2CAP socket layer initialized
[   11.958788] Bluetooth: SCO socket layer initialized
[   11.963733] usbcore: registered new interface driver btusb
[   11.967069] input: HDA Intel HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card1/input17
[   11.967121] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card1/input18
[   11.967167] input: HDA Intel HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/sound/card1/input19
[   12.438944] scsi 1:0:0:0: Direct-Access     Generic- SD/MMC/MS/MSPRO  1.00 PQ: 0 ANSI: 4
[   12.439447] sd 1:0:0:0: Attached scsi generic sg1 type 0
[   12.444441] sd 1:0:0:0: [sdb] Attached SCSI removable disk
[   12.461107] input: ELAN Touchscreen as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/0003:04F3:012D.0001/input/input20
[   12.461297] hid-multitouch 0003:04F3:012D.0001: input,hiddev0,hidraw4: USB HID v1.10 Device [ELAN Touchscreen] on usb-0000:00:14.0-5/input0
[   12.495250] media: Linux media interface: v0.10
[   12.500011] Linux video capture interface: v2.00
[   12.588796] uvcvideo: Found UVC 1.00 device Integrated Camera (04f2:b45d)
[   12.591621] uvcvideo 1-8:1.0: Entity type for entity Extension 4 was not initialized!
[   12.591623] uvcvideo 1-8:1.0: Entity type for entity Processing 2 was not initialized!
[   12.591625] uvcvideo 1-8:1.0: Entity type for entity Camera 1 was not initialized!
[   12.591740] input: Integrated Camera as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/input/input22
[   12.591834] usbcore: registered new interface driver uvcvideo
[   12.591834] USB Video Class driver (1.1.1)
[   12.712458] EXT4-fs (sda1): mounted filesystem without journal. Opts: user_xattr
[   12.998648] [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.
[   13.251132] Console: switching to colour frame buffer device 240x75
[   13.255555] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[   13.500614] usb 1-2.3.3: USB disconnect, device number 11
[   13.504393] scsi 1:0:0:0: rejecting I/O to offline device
[   13.506727] scsi 1:0:0:0: killing request
[   13.549875] usb 1-2.3.1: Warning! Unlikely big volume range (=8192), cval->res is probably wrong.
[   13.549879] usb 1-2.3.1: [11] FU [Sidetone Playback Volume] ch = 1, val = 0/8192/1
[   13.554665] usbcore: registered new interface driver snd-usb-audio
[   14.369829] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   14.370523] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   14.436689] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   14.437282] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[   14.460261] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   15.275510] cgroup: new mount options do not match the existing superblock, will be ignored
[   15.313677] fuse init (API version 7.25)
[   15.508792] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   16.857082] Process accounting resumed
[   18.170306] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   18.196983] wlan0: authenticate with 64:d8:14:6e:08:b0
[   18.203394] wlan0: send auth to 64:d8:14:6e:08:b0 (try 1/3)
[   18.204481] wlan0: authenticated
[   18.204806] wlan0: associate with 64:d8:14:6e:08:b0 (try 1/3)
[   18.207842] wlan0: RX AssocResp from 64:d8:14:6e:08:b0 (capab=0x411 status=0 aid=37)
[   18.208412] wlan0: associated
[   18.208448] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   18.212144] wlan0: Limiting TX power to 20 (20 - 0) dBm as advertised by 64:d8:14:6e:08:b0
[   19.292168] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[   19.413026] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   19.463722] wlan0: deauthenticating from 64:d8:14:6e:08:b0 by local choice (Reason: 3=DEAUTH_LEAVING)
[   20.082174] IPv4: martian source 255.255.255.255 from 10.60.220.22, on dev eth0
[   20.082178] ll header: 00000000: ff ff ff ff ff ff 2c 27 d7 1f 57 8c 08 00        ......,'..W...
[   20.097765] IPv4: martian source 255.255.255.255 from 10.60.220.254, on dev eth0
[   20.097771] ll header: 00000000: ff ff ff ff ff ff fc 99 47 9c 12 4a 08 00        ........G..J..
[   20.098035] IPv4: martian source 255.255.255.255 from 10.60.220.254, on dev eth0
[   20.098039] ll header: 00000000: ff ff ff ff ff ff fc 99 47 9c 12 4a 08 00        ........G..J..
[   20.516758] IPv4: martian source 255.255.255.255 from 10.60.220.41, on dev eth0
[   20.516762] ll header: 00000000: ff ff ff ff ff ff 00 24 9b 11 b8 e3 08 00        .......$......
[   20.519404] IPv4: martian source 255.255.255.255 from 10.60.220.41, on dev eth0
[   20.519408] ll header: 00000000: ff ff ff ff ff ff 00 24 9b 11 b8 e3 08 00        .......$......
[   20.519577] IPv4: martian source 255.255.255.255 from 10.60.220.41, on dev eth0
[   20.519579] ll header: 00000000: ff ff ff ff ff ff 00 24 9b 11 b8 e3 08 00        .......$......
[   25.513708] usb 1-2.3.1: 1:1: cannot get freq at ep 0x81
[   25.535024] usb 1-2.3.1: 1:1: cannot get freq at ep 0x81
[   25.537472] usb 1-2.3.1: 1:1: cannot get freq at ep 0x81
[   25.537564] usb 1-2.3.1: 1:1: cannot set freq 44100 to ep 0x81
[   25.539608] usb 1-2.3.1: 1:1: cannot set freq 44100 to ep 0x81
[   25.541708] usb 1-2.3.1: 1:1: cannot set freq 44100 to ep 0x81
[   25.543795] usb 1-2.3.1: 1:1: cannot set freq 44100 to ep 0x81

** Model information
sys_vendor: LENOVO
product_name: 20BTS3GT00
product_version: ThinkPad X1 Carbon 3rd
chassis_vendor: LENOVO
chassis_version: None
bios_vendor: LENOVO
bios_version: N14ET35W (1.13 )
board_vendor: LENOVO
board_name: 20BTS3GT00
board_version: SDK0K11826 WIN

** Loaded modules:
ctr
ccm
cpufreq_userspace
cpufreq_conservative
cpufreq_stats
cpufreq_powersave
fuse
snd_usb_audio
snd_usbmidi_lib
snd_rawmidi
snd_seq_device
binfmt_misc
uvcvideo
videobuf2_vmalloc
videobuf2_memops
videobuf2_v4l2
videobuf2_core
videodev
media
hid_multitouch
snd_hda_codec_hdmi
btusb
btrtl
btbcm
btintel
bluetooth
arc4
intel_rapl
x86_pkg_temp_thermal
intel_powerclamp
iwlmvm
mac80211
msr
coretemp
acpi_call(OE)
uas
usb_storage
iTCO_wdt
iTCO_vendor_support
snd_hda_codec_realtek
snd_hda_codec_generic
i915
kvm_intel
drm_kms_helper
iwlwifi
kvm
snd_hda_intel
snd_hda_codec
sg
joydev
snd_hda_core
irqbypass
evdev
cfg80211
thinkpad_acpi
pcspkr
serio_raw
drm
snd_hwdep
nvram
lpc_ich
snd_pcm
i2c_i801
intel_pch_thermal
mei_me
mfd_core
snd_timer
snd
mei
shpchp
i2c_algo_bit
wmi
ac
battery
soundcore
rfkill
tpm_crb
video
button
tpm_tis
tpm
nf_conntrack_ipv6
nf_defrag_ipv6
ip6table_filter
ip6_tables
ipt_REJECT
nf_reject_ipv4
xt_tcpudp
nf_conntrack_ipv4
nf_defrag_ipv4
xt_conntrack
nf_conntrack
iptable_filter
sch_fq_codel
ip_tables
x_tables
autofs4
ext4
crc16
jbd2
mbcache
algif_skcipher
af_alg
hid_plantronics
hid_generic
usbhid
hid
dm_crypt
dm_mod
sd_mod
crct10dif_pclmul
crc32_pclmul
crc32c_intel
ghash_clmulni_intel
jitterentropy_rng
hmac
drbg
ansi_cprng
aesni_intel
ahci
aes_x86_64
libahci
lrw
gf128mul
glue_helper
ablk_helper
libata
cryptd
e1000e
xhci_pci
xhci_hcd
psmouse
scsi_mod
ptp
pps_core
usbcore
usb_common
thermal
fjes

** PCI devices:
00:00.0 Host bridge [0600]: Intel Corporation Broadwell-U Host Bridge -OPI [8086:1604] (rev 09)
	Subsystem: Lenovo Broadwell-U Host Bridge -OPI [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: <access denied>
	Kernel driver in use: bdw_uncore

00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
	Subsystem: Lenovo HD Graphics 5500 [17aa:2227]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 55
	Region 0: Memory at e0000000 (64-bit, non-prefetchable) [size=16M]
	Region 2: Memory at c0000000 (64-bit, prefetchable) [size=512M]
	Region 4: I/O ports at 3000 [size=64]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: i915
	Kernel modules: i915

00:03.0 Audio device [0403]: Intel Corporation Broadwell-U Audio Controller [8086:160c] (rev 09)
	Subsystem: Lenovo Broadwell-U Audio Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 56
	Region 0: Memory at e1230000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

00:14.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB xHCI Controller [8086:9cb1] (rev 03) (prog-if 30 [XHCI])
	Subsystem: Lenovo Wildcat Point-LP USB xHCI Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 42
	Region 0: Memory at e1220000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: <access denied>
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci

00:16.0 Communication controller [0780]: Intel Corporation Wildcat Point-LP MEI Controller #1 [8086:9cba] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP MEI Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 52
	Region 0: Memory at e1239000 (64-bit, non-prefetchable) [size=32]
	Capabilities: <access denied>
	Kernel driver in use: mei_me
	Kernel modules: mei_me

00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection (3) I218-V [8086:15a3] (rev 03)
	Subsystem: Lenovo Ethernet Connection (3) I218-V [17aa:2227]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 43
	Region 0: Memory at e1200000 (32-bit, non-prefetchable) [size=128K]
	Region 1: Memory at e123c000 (32-bit, non-prefetchable) [size=4K]
	Region 2: I/O ports at 3060 [size=32]
	Capabilities: <access denied>
	Kernel driver in use: e1000e
	Kernel modules: e1000e

00:1b.0 Audio device [0403]: Intel Corporation Wildcat Point-LP High Definition Audio Controller [8086:9ca0] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP High Definition Audio Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 32, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 53
	Region 0: Memory at e1234000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

00:1c.0 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #2 [8086:9c92] (rev e3) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin B routed to IRQ 17
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
	I/O behind bridge: 00002000-00002fff
	Memory behind bridge: b0100000-b02fffff
	Prefetchable memory behind bridge: 00000000b0300000-00000000b04fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport
	Kernel modules: shpchp

00:1c.1 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #3 [8086:9c94] (rev e3) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin C routed to IRQ 18
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
	Memory behind bridge: e1100000-e11fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport
	Kernel modules: shpchp

00:1c.5 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #6 [8086:9c9a] (rev e3) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin B routed to IRQ 17
	Bus: primary=00, secondary=0a, subordinate=0a, sec-latency=0
	Memory behind bridge: e1000000-e10fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport
	Kernel modules: shpchp

00:1f.0 ISA bridge [0601]: Intel Corporation Wildcat Point-LP LPC Controller [8086:9cc3] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP LPC Controller [17aa:2227]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: <access denied>
	Kernel driver in use: lpc_ich
	Kernel modules: lpc_ich

00:1f.3 SMBus [0c05]: Intel Corporation Wildcat Point-LP SMBus Controller [8086:9ca2] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP SMBus Controller [17aa:2227]
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin C routed to IRQ 18
	Region 0: Memory at e1238000 (64-bit, non-prefetchable) [size=256]
	Region 4: I/O ports at efa0 [size=32]
	Kernel driver in use: i801_smbus
	Kernel modules: i2c_i801

00:1f.6 Signal processing controller [1180]: Intel Corporation Wildcat Point-LP Thermal Management Controller [8086:9ca4] (rev 03)
	Subsystem: Lenovo Wildcat Point-LP Thermal Management Controller [17aa:2227]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin C routed to IRQ 18
	Region 0: Memory at e123b000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: intel_pch_thermal
	Kernel modules: intel_pch_thermal

04:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095b] (rev 99)
	Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5210]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 54
	Region 0: Memory at e1100000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: <access denied>
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

0a:00.0 SATA controller [0106]: Samsung Electronics Co Ltd Device [144d:a801] (rev 01) (prog-if 01 [AHCI 1.0])
	Subsystem: Samsung Electronics Co Ltd Device [144d:a801]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort+ <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 44
	Region 5: Memory at e1000000 (32-bit, non-prefetchable) [size=8K]
	Capabilities: <access denied>
	Kernel driver in use: ahci
	Kernel modules: ahci


** USB devices:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 007: ID 04f2:b45d Chicony Electronics Co., Ltd 
Bus 001 Device 003: ID 04f3:012d Elan Microelectronics Corp. 
Bus 001 Device 010: ID 047f:c025 Plantronics, Inc. 
Bus 001 Device 008: ID 0451:8043 Texas Instruments, Inc. 
Bus 001 Device 009: ID 05f3:0007 PI Engineering, Inc. Kinesis Advantage PRO MPC/USB Keyboard
Bus 001 Device 006: ID 05f3:0081 PI Engineering, Inc. Kinesis Integrated Hub
Bus 001 Device 004: ID 046d:c050 Logitech, Inc. RX 250 Optical Mouse
Bus 001 Device 002: ID 0451:8043 Texas Instruments, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (900, 'unstable'), (800, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages linux-image-4.7.0-1-amd64 depends on:
ii  initramfs-tools [linux-initramfs-tool]  0.125
ii  kmod                                    22-1.1
ii  linux-base                              4.4

Versions of packages linux-image-4.7.0-1-amd64 recommends:
ii  firmware-linux-free  3.4
ii  irqbalance           1.1.0-2

Versions of packages linux-image-4.7.0-1-amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  grub-pc                 2.02~beta2-36
ii  linux-doc-4.7           4.7.2-1

Versions of packages linux-image-4.7.0-1-amd64 is related to:
ii  firmware-amd-graphics     20160110-1
pn  firmware-atheros          <none>
pn  firmware-bnx2             <none>
pn  firmware-bnx2x            <none>
pn  firmware-brcm80211        <none>
pn  firmware-cavium           <none>
ii  firmware-intel-sound      20160110-1
pn  firmware-intelwimax       <none>
pn  firmware-ipw2x00          <none>
pn  firmware-ivtv             <none>
ii  firmware-iwlwifi          20160110-1
pn  firmware-libertas         <none>
ii  firmware-linux-nonfree    20160110-1
ii  firmware-misc-nonfree     20160110-1
pn  firmware-myricom          <none>
pn  firmware-netxen           <none>
pn  firmware-qlogic           <none>
pn  firmware-realtek          <none>
pn  firmware-samsung          <none>
pn  firmware-siano            <none>
pn  firmware-ti-connectivity  <none>
pn  xen-hypervisor            <none>

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#55624 — Processed: Re: Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0

From	owner@bugs.debian.org (Debian Bug Tracking System)
Date	2016-11-02 21:20 +0100
Subject	Processed: Re: Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0
Message-ID	<szaaS-2yB-25@gated-at.bofh.it>
In reply to	#55021

Processing control commands:

> tags -1 + moreinfo
Bug #836734 [src:linux] Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0
Added tag(s) moreinfo.

-- 
836734: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=836734
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#55625

From	Salvatore Bonaccorso <carnil@debian.org>
Date	2016-11-02 21:20 +0100
Message-ID	<szaaS-2yB-27@gated-at.bofh.it>
In reply to	#55021

Control: tags -1 + moreinfo

Hi Yuri,

On Mon, Sep 05, 2016 at 12:27:04PM +0200, Yuri D'Elia wrote:
> Package: src:linux
> Version: 4.7.2-1
> Severity: normal
> 
> I'm using a Carbon X1 (3rd gen). Compared to the latest 4.6 kernel, this image
> has a significant performance regression in all I/O related operations.
> 
> Just as a ballpark, 4.6.0-1 can boot in generally less than 3 seconds after the
> grub screen. With 4.7.0-1, it takes over 10.
> 
> I'm unsure at what exactly look for, as it could also be related to many
> subsystems (I'm using an ext4 fs in an encrypted volume).

I was seeing similar issues with a X1 laptop after the update of 4.6.x
to 4.7.x, and seem dissapeared with the update to 4.8.5-1. I was
unable to deduce though the introducing change for this regression.

Regards,
Salvatore

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#55631

From	Yuri D'Elia <wavexx@thregr.org>
Date	2016-11-03 16:10 +0100
Message-ID	<szrOq-5vm-19@gated-at.bofh.it>
In reply to	#55625

On Wed, Nov 02 2016, Salvatore Bonaccorso wrote:
>> I'm unsure at what exactly look for, as it could also be related to many
>> subsystems (I'm using an ext4 fs in an encrypted volume).
>
> I was seeing similar issues with a X1 laptop after the update of 4.6.x
> to 4.7.x, and seem dissapeared with the update to 4.8.5-1. I was
> unable to deduce though the introducing change for this regression.

Hi. It does seem to have improved. In fact, the last 4.7 kernel also
doesn't seem to suffer from this problem.

But since you mention also having an X1, can I ask if you have problems
with system hangs occasionally when wifi is turned on? This problem
similarly started with the 4.7 kernels. I know it's because of the wifi
as I'm almost always working with a cable and never have issues, but
when I work over wifi, I often get hangs when the system is
displaying some heavy web page. sysrq doesn't work (the system is
totally frozen).

On top of that, the X1 also does seem to hang if you plug usb hid
devices during boot (confirmed with other laptops with the same series).
We have a batch of 12 of those laptops. Two of those developed "stains"
in the brightness of the backlight. 6 of those have a defective up arrow
key. The contrast of the screen also degraded quite quickly, making it
much less appealing as it was supposed to be.

This is the crappiest QC I've ever seen in a laptop which is supposedly
top of the line.

Sorry, rant over.

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csiph-web

Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0

Contents

#55021 — Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0

#55624 — Processed: Re: Bug#836734: Considerable I/O performance regression on Lenovo Carbon X1 with 4.7.0

#55625

#55631