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Message-Id: <CDB3D138-7AB5-4166-9167-134784AF90D5@smartx.com>
Date: Tue, 18 Apr 2023 17:20:51 +0800
From: Li Feng <fengli@...rtx.com>
To: Chaitanya Kulkarni <chaitanyak@...dia.com>
Cc: Sagi Grimberg <sagi@...mberg.me>,
"open list:NVM EXPRESS DRIVER" <linux-nvme@...ts.infradead.org>,
Christoph Hellwig <hch@....de>,
Keith Busch <kbusch@...nel.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
Jens Axboe <axboe@...com>, Ming Lei <ming.lei@...hat.com>
Subject: Re: [PATCH] nvme/tcp: Add support to set the tcp worker cpu affinity
> 2023年4月18日 上午11:58，Chaitanya Kulkarni <chaitanyak@...dia.com> 写道：
>
>
>> - It is not backed by performance improvements, but more importantly
>> does not cover any potential regressions in key metrics (bw/iops/lat)
>> or lack there of.
>>
>
> I've already asked for this, without seeing performance numbers
> and any regression for general usecase it is hard to justify this.
>
> -ck
>
>
>
Hi ck & sagi,
There are more io pattern results.
# ENV
[root@...e81 vhost]# uname -a
Linux Node81 5.10.0-136.28.0.104.oe2203sp1.aarch64 #1 SMP Thu Apr 13 10:50:10 CST 2023 aarch64 aarch64 aarch64 GNU/Linux
[root@...e81 vhost]# lscpu
Architecture: aarch64
CPU op-mode(s): 64-bit
Byte Order: Little Endian
CPU(s): 96
On-line CPU(s) list: 0-95
Vendor ID: HiSilicon
BIOS Vendor ID: HiSilicon
Model name: Kunpeng-920
BIOS Model name: HUAWEI Kunpeng 920 5251K
Model: 0
Thread(s) per core: 1
Core(s) per socket: 48
Socket(s): 2
Stepping: 0x1
Frequency boost: disabled
CPU max MHz: 2600.0000
CPU min MHz: 200.0000
BogoMIPS: 200.00
Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
Caches (sum of all):
L1d: 6 MiB (96 instances)
L1i: 6 MiB (96 instances)
L2: 48 MiB (96 instances)
L3: 96 MiB (4 instances)
NUMA:
NUMA node(s): 4
NUMA node0 CPU(s): 0-23
NUMA node1 CPU(s): 24-47
NUMA node2 CPU(s): 48-71
NUMA node3 CPU(s): 72-95
Vulnerabilities:
Itlb multihit: Not affected
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Mmio stale data: Not affected
Retbleed: Not affected
Spec store bypass: Not affected
Spectre v1: Mitigation; __user pointer sanitization
Spectre v2: Not affected
Srbds: Not affected
Tsx async abort: Not affected
[root@...e81 host3]# numactl -H
available: 4 nodes (0-3)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
node 0 size: 0 MB
node 0 free: 0 MB
node 1 cpus: 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
node 1 size: 31619 MB
node 1 free: 30598 MB
node 2 cpus: 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
node 2 size: 0 MB
node 2 free: 0 MB
node 3 cpus: 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
node 3 size: 31219 MB
node 3 free: 29854 MB
node distances:
node 0 1 2 3
0: 10 12 20 22
1: 12 10 22 24
2: 20 22 10 12
3: 22 24 12 10
[root@...e81 vhost]# lshw -short -c network
H/W path Device Class Description
===========================================================
/0/106/0 enp129s0f0np0 network MT27800 Family [ConnectX-5]
/0/106/0.1 enp129s0f1np1 network MT27800 Family [ConnectX-5]
[root@...e81 vhost]# lspci | grep MT
81:00.0 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5]
81:00.1 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5]
[root@...e81 vhost]# ethtool -i enp129s0f0np0
driver: mlx5_core
version: 5.0-0
firmware-version: 16.35.2000 (MT_0000000425)
expansion-rom-version:
bus-info: 0000:81:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: yes
[root@...e81 vhost]# lspci -s 81:00.0 -vv
81:00.0 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5]
Subsystem: Mellanox Technologies Device 0121
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: 32 bytes
Interrupt: pin A routed to IRQ 27
NUMA node: 2
Region 0: Memory at 280002000000 (64-bit, prefetchable) [size=32M]
Expansion ROM at b0200000 [disabled] [size=1M]
Capabilities: [60] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited
ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 25W
DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq-
RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ FLReset-
MaxPayload 256 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq+ AuxPwr- TransPend-
LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM not supported
ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 128 bytes, Disabled- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 8GT/s, Width x8
TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range ABC, TimeoutDis+ NROPrPrP- LTR-
10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- EETLPPrefix-
EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
FRS- TPHComp- ExtTPHComp-
AtomicOpsCap: 32bit- 64bit- 128bitCAS-
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR- 10BitTagReq- OBFF Disabled,
AtomicOpsCtl: ReqEn+
LnkCap2: Supported Link Speeds: 2.5-8GT/s, Crosslink- Retimer- 2Retimers- DRS-
LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB preshoot
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+ EqualizationPhase1+
EqualizationPhase2+ EqualizationPhase3+ LinkEqualizationRequest-
Retimer- 2Retimers- CrosslinkRes: unsupported
Capabilities: [48] Vital Product Data
Product Name: CX512A - ConnectX-5 SFP28
Read-only fields:
[PN] Part number: MCX512A-ACUT
[EC] Engineering changes: B7
[V2] Vendor specific: MCX512A-ACUT
[SN] Serial number: MT2211K02268
[V3] Vendor specific: fe87176f019fec1180001070fd62e0e0
[VA] Vendor specific: MLX:MODL=CX512A:MN=MLNX:CSKU=V2:UUID=V3:PCI=V0
[V0] Vendor specific: PCIeGen3 x8
[RV] Reserved: checksum good, 0 byte(s) reserved
End
Capabilities: [9c] MSI-X: Enable+ Count=64 Masked-
Vector table: BAR=0 offset=00002000
PBA: BAR=0 offset=00003000
Capabilities: [c0] Vendor Specific Information: Len=18 <?>
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0-,D1-,D2-,D3hot-,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [100 v1] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol-
UESvrt: DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr-
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
AERCap: First Error Pointer: 08, ECRCGenCap+ ECRCGenEn- ECRCChkCap+ ECRCChkEn-
MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
HeaderLog: 00000000 00000000 00000000 00000000
Capabilities: [150 v1] Alternative Routing-ID Interpretation (ARI)
ARICap: MFVC- ACS-, Next Function: 1
ARICtl: MFVC- ACS-, Function Group: 0
Capabilities: [180 v1] Single Root I/O Virtualization (SR-IOV)
IOVCap: Migration- 10BitTagReq- Interrupt Message Number: 000
IOVCtl: Enable- Migration- Interrupt- MSE- ARIHierarchy+ 10BitTagReq-
IOVSta: Migration-
Initial VFs: 8, Total VFs: 8, Number of VFs: 0, Function Dependency Link: 00
VF offset: 2, stride: 1, Device ID: 1018
Supported Page Size: 000007ff, System Page Size: 00000001
Region 0: Memory at 0000280004800000 (64-bit, prefetchable)
VF Migration: offset: 00000000, BIR: 0
Capabilities: [1c0 v1] Secondary PCI Express
LnkCtl3: LnkEquIntrruptEn- PerformEqu-
LaneErrStat: 0
Capabilities: [230 v1] Access Control Services
ACSCap: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- EgressCtrl- DirectTrans-
ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- EgressCtrl- DirectTrans-
Kernel driver in use: mlx5_core
Kernel modules: mlx5_core
# Before patch:
2293 root 0 -20 0 0 0 R 68.6 0.0 0:23.85 kworker/0:1H+nvme_tcp_wq
12504 root 20 0 476960 26280 20140 S 41.3 0.0 0:03.38 fio
pattern | bandwidth(MiB/s) | iops | latency(us)
:- | -: | -: | -:
4k-randread-q128-j1 | 308 | 79086 | 1617.33
256k-randread-q128-j1 | 1072 | 4288 | 29822.7
4k-randwrite-q128-j1 | 327 | 83782 | 1526.77
256k-randwrite-q128-j1 | 1807 | 7228 | 17700.8
# After patch:
[root@...e81 host3]# cat /sys/module/nvme_tcp/parameters/cpu_affinity_list
66-68
1862 root 0 -20 0 0 0 R 56.6 0.0 0:59.37 kworker/66:1H+nvme_tcp_wq
12348 root 20 0 476960 25892 19804 S 45.4 0.0 0:02.00 fio
pattern | bandwidth(MiB/s) | iops | latency(us)
:- | -: | -: | -:
4k-randread-q128-j1 | 451 | 115530 | 1107.1
256k-randread-q128-j1 | 1410 | 5641 | 22671.7
4k-randwrite-q128-j1 | 432 | 110738 | 1155.12
256k-randwrite-q128-j1 | 1818 | 7274 | 17591.4
4k-randread-q128-j1 means 4k randread, iodepth = 128, jobs = 1.
All nvme-tcp io queue is 1.
Fio binds to numa node 2 cpu 69-70 like this:
taskset -c 69-70 fio --ioengine=libaio --numjobs=1 …...
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