tr -s 删除所有重复出现字符序列，只保留第一个；即将重复出现字符串压缩为一个字符串。
cat /proc/interrupts | tr -s " " | more
[root@localhost ixgbe]# cat /proc/interrupts |less -S CPU0 CPU1 CPU2 CPU3 CPU4 1: 0 0 0 0 0 3: 0 0 0 0 0 4: 35908519 35873132 6849634 14474714 2443894 9: 0 0 0 0 0 10: 0 0 0 0 0 15: 680 0 0 0 0 16: 0 0 0 0 0 17: 0 0 0 0 0 19: 0 0 0 0 0 20: 0 0 0 0 0 21: 0 0 0 0 0 22: 0 0 0 0 0 23: 0 0 0 0 0 24: 0 0 0 0 0 25: 0 0 0 0 0 26: 0 0 0 0 0 27: 0 0 0 0 0 28: 0 0 0 0 0 29: 0 0 0 0 0 30: 0 0 0 0 0 31: 0 0 0 0 0 32: 0 0 0 0 0 33: 0 0 0 0 0 34: 0 0 0 0 0 35: 0 0 0 0 0 36: 0 0 0 0 0 37: 0 0 0 0 0 38: 0 0 0 0 0 39: 0 0 0 0 0 40: 0 0 0 0 0 41: 0 0 0 0 0 42: 0 0 0 0 0 43: 96 0 0 0 0 44: 0 0 0 0 0 45: 0 0 0 0 0 46: 0 0 0 0 0 47: 0 0 0 0 0 48: 82 0 0 0 0 49: 0 0 0 0 0 50: 0 0 0 0 0 51: 0 0 0 0 0 52: 0 0 0 0 0 53: 0 0 0 0 0 54: 0 0 0 0 0 55: 0 0 0 0 0 56: 0 0 0 0 0 57: 0 0 0 0 0 58: 0 0 0 0 0 59: 0 0 0 0 0 [root@localhost ixgbe]# cat /proc/interrupts |less -S
#!/bin/sh sed -r -e 's/^ *//' -e 's/ {2,}/|/g' < /proc/interrupts | awk -F'|' ' BEGIN { cpu_n = 0; } NR == 1 { for(i = 1; i <= NF; i++) if($i ~ CPU) cpu_n++; } NR > 1 { sum = 0; for(i = 2; i <= cpu_n + 1; i++) sum += $i; printf("%4s %12d %-20s ", $1, sum, $6); for(i = 1; i < 7; i++) $i = ""; print; }' | sort -nrk2
sed -r -e 's/^ *//' -e 's/ {2,}/|/g' < /proc/interrupts | grep -i tx 282:|17|0|442319|0|123266|0|0|0|0|0|0|0|0|26092|0|0|0|0|0|0|0|0|0|0|0|4298521|0|208369|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|ITS-MSI 65536001 Edge|enp125s0f0-TxRx-0 413:|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|ITS-MSI 65538049 Edge|enp125s0f1-TxRx-0 541:|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|ITS-MSI 65540097 Edge|enp125s0f2-TxRx-0 735:|0|0|0|0|0|0|0|0|2241|0|0|0|0|0|0|0|0|0|0|0|537920|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|ITS-MSI 65542145 Edge|enp125s0f3-TxRx-0 [root@localhost ixgbe]#
[root@localhost ixgbe]# lspci -vv | grep -i ether 05:00.0 Ethernet controller: Huawei Technologies Co., Ltd. Hi1822 Family (2*25GE) (rev 45) 06:00.0 Ethernet controller: Huawei Technologies Co., Ltd. Hi1822 Family (2*25GE) (rev 45) 7d:00.0 Ethernet controller: Huawei Technologies Co., Ltd. HNS GE/10GE/25GE RDMA Network Controller (rev 21) 7d:00.1 Ethernet controller: Huawei Technologies Co., Ltd. HNS GE/10GE/25GE Network Controller (rev 21) 7d:00.2 Ethernet controller: Huawei Technologies Co., Ltd. HNS GE/10GE/25GE RDMA Network Controller (rev 21) 7d:00.3 Ethernet controller: Huawei Technologies Co., Ltd. HNS GE/10GE/25GE Network Controller (rev 21)
[root@localhost ixgbe]# ls /sys/bus/pci/drivers/vfio-pci/ -al 总用量 0 drwxr-xr-x. 2 root root 0 8月 26 23:05 . drwxr-xr-x. 21 root root 0 8月 25 06:44 .. lrwxrwxrwx. 1 root root 0 9月 2 21:12 0000:05:00.0 -> ../../../../devices/pci0000:00/0000:00:0c.0/0000:03:00.0/0000:04:00.0/0000:05:00.0 lrwxrwxrwx. 1 root root 0 9月 2 22:28 0000:06:00.0 -> ../../../../devices/pci0000:00/0000:00:0c.0/0000:03:00.0/0000:04:01.0/0000:06:00.0 --w-------. 1 root root 65536 9月 2 22:16 bind lrwxrwxrwx. 1 root root 0 9月 2 21:12 module -> ../../../../module/vfio_pci --w-------. 1 root root 65536 9月 2 22:27 new_id --w-------. 1 root root 65536 9月 2 21:12 remove_id --w-------. 1 root root 65536 9月 2 21:12 uevent --w-------. 1 root root 65536 9月 2 22:26 unbind [root@localhost ixgbe]#
运行dpdk中断
[root@localhost dpdk-19.11]# ./examples/kni/build/app/kni -c 0xFFFFF -n 4 -- -P -p 0x01 --config="(0,0,1)" EAL: Detected 128 lcore(s) EAL: Detected 4 NUMA nodes EAL: Multi-process socket /var/run/dpdk/rte/mp_socket EAL: Selected IOVA mode 'PA' EAL: No available hugepages reported in hugepages-2048kB EAL: Probing VFIO support... EAL: VFIO support initialized EAL: PCI device 0000:05:00.0 on NUMA socket 0 EAL: probe driver: 19e5:200 net_hinic EAL: using IOMMU type 1 (Type 1) net_hinic: Initializing pf hinic-0000:05:00.0 in primary process net_hinic: Device 0000:05:00.0 hwif attribute: net_hinic: func_idx:0, p2p_idx:0, pciintf_idx:0, vf_in_pf:0, ppf_idx:0, global_vf_id:15, func_type:2 net_hinic: num_aeqs:4, num_ceqs:4, num_irqs:32, dma_attr:2 net_hinic: Get public resource capability: net_hinic: host_id: 0x0, ep_id: 0x0, intr_type: 0x0, max_cos_id: 0x7, er_id: 0x0, port_id: 0x0 net_hinic: host_total_function: 0xf2, host_oq_id_mask_val: 0x8, max_vf: 0x78
[root@localhost ixgbe]# ls /sys/devices/pci0000:00/0000:00:0c.0/0000:03:00.0/0000:04:00.0/0000:05:00.0/msi_irqs/120 /sys/devices/pci0000:00/0000:00:0c.0/0000:03:00.0/0000:04:00.0/0000:05:00.0/msi_irqs/120 [root@localhost ixgbe]# cat /sys/devices/pci0000:00/0000:00:0c.0/0000:03:00.0/0000:04:00.0/0000:05:00.0/msi_irqs/120 msix [root@localhost ixgbe]#
[root@localhost ixgbe]# sed -r -e 's/^ *//' -e 's/ {2,}/|/g' < /proc/interrupts | grep 120: 120:|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|ITS-MSI 2621440 Edge|vfio-msix[0](0000:05:00.0)
[root@localhost ixgbe]# lspci -xxx -vv -s 05:00.0 05:00.0 Ethernet controller: Huawei Technologies Co., Ltd. Hi1822 Family (2*25GE) (rev 45) Subsystem: Huawei Technologies Co., Ltd. Device d139 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 NUMA node: 0 Region 0: Memory at 80007b00000 (64-bit, prefetchable) [size=128K] Region 2: Memory at 80008a20000 (64-bit, prefetchable) [size=32K] Region 4: Memory at 80000200000 (64-bit, prefetchable) [size=1M] Expansion ROM at e9200000 [disabled] [size=1M] Capabilities: [40] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 0.000W DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported- RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ FLReset- MaxPayload 256 bytes, MaxReadReq 512 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM not supported, Exit Latency L0s unlimited, L1 unlimited ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+ LnkCtl: ASPM Disabled; RCB 128 bytes Disabled- CommClk- ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range B, TimeoutDis+, LTR-, OBFF Not Supported DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis- Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance De-emphasis: -6dB LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+, EqualizationPhase1+ EqualizationPhase2+, EqualizationPhase3+, LinkEqualizationRequest- Capabilities: [80] MSI: Enable- Count=1/32 Maskable+ 64bit+ Address: 0000000000000000 Data: 0000 Masking: 00000000 Pending: 00000000 Capabilities: [a0] MSI-X: Enable+ Count=32 Masked- Vector table: BAR=2 offset=00000000 PBA: BAR=2 offset=00004000 Capabilities: [b0] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [c0] Vital Product Data Product Name: Huawei IN200 2*100GE Adapter Read-only fields: [PN] Part number: SP572 End 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- NonFatalErr- CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr- AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn- Capabilities: [150 v1] Alternative Routing-ID Interpretation (ARI) ARICap: MFVC- ACS-, Next Function: 0 ARICtl: MFVC- ACS-, Function Group: 0 Capabilities: [200 v1] Single Root I/O Virtualization (SR-IOV) IOVCap: Migration-, Interrupt Message Number: 000 IOVCtl: Enable- Migration- Interrupt- MSE- ARIHierarchy+ IOVSta: Migration- Initial VFs: 120, Total VFs: 120, Number of VFs: 0, Function Dependency Link: 00 VF offset: 1, stride: 1, Device ID: 375e Supported Page Size: 00000553, System Page Size: 00000010 Region 0: Memory at 0000080007b20000 (64-bit, prefetchable) Region 2: Memory at 00000800082a0000 (64-bit, prefetchable) Region 4: Memory at 0000080000300000 (64-bit, prefetchable) VF Migration: offset: 00000000, BIR: 0 Capabilities: [310 v1] #19 Capabilities: [4e0 v1] Device Serial Number 44-a1-91-ff-ff-a4-9b-eb Capabilities: [4f0 v1] Transaction Processing Hints Device specific mode supported No steering table available Capabilities: [600 v1] Vendor Specific Information: ID=0000 Rev=0 Len=028 <?> Capabilities: [630 v1] Access Control Services ACSCap: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- EgressCtrl- DirectTrans- ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- EgressCtrl- DirectTrans- Kernel driver in use: vfio-pci Kernel modules: hinic 00: e5 19 00 02 06 04 10 00 45 00 00 02 08 00 00 00 10: 0c 00 b0 07 00 08 00 00 0c 00 a2 08 00 08 00 00 20: 0c 00 20 00 00 08 00 00 00 00 00 00 e5 19 39 d1 30: 00 00 40 e6 40 00 00 00 00 00 00 00 ff 00 00 00 40: 10 80 02 00 e2 8f 00 10 37 29 10 00 03 f1 43 00 50: 08 00 03 01 00 00 00 00 00 00 00 00 00 00 00 00 60: 00 00 00 00 92 03 00 00 00 00 00 00 0e 00 00 00 70: 03 00 1f 00 00 00 00 00 00 00 00 00 00 00 00 00 80: 05 a0 8a 01 00 00 00 00 00 00 00 00 00 00 00 00 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 a0: 11 b0 1f 80 02 00 00 00 02 40 00 00 00 00 00 00 b0: 01 c0 03 f8 00 00 00 00 00 00 00 00 00 00 00 00 c0: 03 00 28 80 37 32 78 ff 00 00 00 00 00 00 00 00 d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [root@localhost ixgbe]#
[root@localhost 0000:7d:00.0]# ls msi_irqs/ 281 292 303 314 325 336 347 358 369 380 391 402 282 293 304 315 326 337 348 359 370 381 392 403 283 294 305 316 327 338 349 360 371 382 393 404 284 295 306 317 328 339 350 361 372 383 394 405 285 296 307 318 329 340 351 362 373 384 395 406 286 297 308 319 330 341 352 363 374 385 396 407 287 298 309 320 331 342 353 364 375 386 397 408 288 299 310 321 332 343 354 365 376 387 398 409 289 300 311 322 333 344 355 366 377 388 399 410 290 301 312 323 334 345 356 367 378 389 400 411 291 302 313 324 335 346 357 368 379 390 401 [root@localhost 0000:7d:00.0]# cat msi_irqs/281 msix [root@localhost 0000:7d:00.0]# ethtool -i enp125s0f0 driver: hns3 version: 4.14.0-115.el7a.0.1.aarch64 SMP firmware-version: 0x01080c03 expansion-rom-version: bus-info: 0000:7d:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: no supports-register-dump: yes supports-priv-flags: no [root@localhost 0000:7d:00.0]# pwd /sys/devices/pci0000:7c/0000:7c:00.0/0000:7d:00.0 [root@localhost 0000:7d:00.0]# sed -r -e 's/^ *//' -e 's/ {2,}/|/g' < /proc/interrupts | grep enp125s0f0 282:|17|0|442319|0|123266|0|0|0|0|0|0|0|0|26092|0|0|0|0|0|0|0|0|0|0|0|4325780|0|208369|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|ITS-MSI 65536001 Edge|enp125s0f0-TxRx-0 [root@localhost 0000:7d:00.0]# cat msi_irqs/282 msix [root@localhost 0000:7d:00.0]#
[root@localhost 0000:7d:00.0]# ls $(readlink -e /sys/class/net/enp125s0f0/../../msi_irqs) 281 292 303 314 325 336 347 358 369 380 391 402 282 293 304 315 326 337 348 359 370 381 392 403 283 294 305 316 327 338 349 360 371 382 393 404 284 295 306 317 328 339 350 361 372 383 394 405 285 296 307 318 329 340 351 362 373 384 395 406 286 297 308 319 330 341 352 363 374 385 396 407 287 298 309 320 331 342 353 364 375 386 397 408 288 299 310 321 332 343 354 365 376 387 398 409 289 300 311 322 333 344 355 366 377 388 399 410 290 301 312 323 334 345 356 367 378 389 400 411 291 302 313 324 335 346 357 368 379 390 401 [root@localhost 0000:7d:00.0]#
APCI PRT Table Dump [ 0.076942] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 10 *11 12 14 15) [ 0.077030] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled. [ 0.077111] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 *10 11 12 14 15) [ 0.077191] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 *10 11 12 14 15) [ 0.077270] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 *5 6 10 11 12 14 15) [ 0.077352] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled. [ 0.077432] ACPI: PCI Interrupt Link [LNKG] (IRQs *3 4 5 6 10 11 12 14 15) [ 0.077511] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 10 *11 12 14 15) This is how the PIRQ[D:A] and PIRQ[H:E] are mapped by firmware (I assume this is PIC mode). PCI Interrupt Requests: In non-APIC mode the PIRQx# signals can be routed to interrupts 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 or 15 as described in Section 5.8.6. Each PIRQx# line has a separate Route Control register. In APIC mode, these signals are connected to the internal I/O APIC in the following fashion: PIRQA# is connected to IRQ16, PIRQB# to IRQ17, PIRQC# to IRQ18, and PIRQD# to IRQ19. This frees the legacy interrupts Dumping the actual PIN mapping once the OS has booted up lspci -b -vvv | grep "Interrupt: pin" Interrupt: pin A routed to IRQ 11 Interrupt: pin A routed to IRQ 11 Interrupt: pin A routed to IRQ 11 Interrupt: pin A routed to IRQ 11 Interrupt: pin A routed to IRQ 5 Interrupt: pin A routed to IRQ 3 Interrupt: pin A routed to IRQ 11 Interrupt: pin B routed to IRQ 10 Interrupt: pin C routed to IRQ 10 Note: From the PRT LNKA - 11 LNKD - 10 LNKE - 5 LNKG - 3 Actual interrupts used lspci -vvv | grep "Interrupt: pin" Interrupt: pin A routed to IRQ 43 Interrupt: pin A routed to IRQ 48 Interrupt: pin A routed to IRQ 44 Interrupt: pin A routed to IRQ 47 Interrupt: pin A routed to IRQ 46 Interrupt: pin A routed to IRQ 45 Interrupt: pin A routed to IRQ 23 Interrupt: pin B routed to IRQ 42 Interrupt: pin C routed to IRQ 18 This matches: PIRQC# to IRQ18 which is the mapping for pin C in APIC mode Factoring in MSI cat /proc/interrupts This shows all MSI capable devices have been mapped away. The only one still on pin based interrupts is IRQ18. CPU0 CPU1 CPU2 CPU3 0: 120 0 0 0 IR-IO-APIC 2-edge timer 4: 0 9 0 0 IR-IO-APIC 4-edge ttyS0 8: 0 0 0 1 IR-IO-APIC 8-edge rtc0 9: 0 164 0 0 IR-IO-APIC 9-fasteoi acpi 18: 0 0 0 0 IR-IO-APIC 18-fasteoi i801_smbus 23: 0 33 0 0 IR-IO-APIC 23-fasteoi ehci_hcd:usb1 40: 0 0 0 0 DMAR-MSI 0-edge dmar0 41: 0 0 0 0 DMAR-MSI 1-edge dmar1 42: 0 0 5880 0 IR-PCI-MSI 512000-edge ahci[0000:00:1f.2] 43: 0 0 0 1305 IR-PCI-MSI 32768-edge i915 44: 0 0 0 0 IR-PCI-MSI 327680-edge xhci_hcd 45: 0 0 389 0 IR-PCI-MSI 442368-edge snd_hda_intel:card1 46: 0 0 0 8498 IR-PCI-MSI 409600-edge eno1 47: 13 0 0 0 IR-PCI-MSI 360448-edge mei_me 48: 0 0 90 0 IR-PCI-MSI 49152-edge snd_hda_intel:card0 And 18 is not remapped as the device is not MSI capable 00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04) Subsystem: Intel Corporation Device 2054 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 f7c39000 (64-bit, non-prefetchable) [size=256] Region 4: I/O ports at f040 [size=32] Kernel driver in use: i801_smbus Kernel modules: i2c_i801 Debug outputs on Virtual Q35 (QEMU) PRT Table [ 0.060061] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11) [ 0.060118] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11) [ 0.060172] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11) [ 0.060225] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11) [ 0.060279] ACPI: PCI Interrupt Link [LNKE] (IRQs 5 *10 11) [ 0.060333] ACPI: PCI Interrupt Link [LNKF] (IRQs 5 *10 11) [ 0.060386] ACPI: PCI Interrupt Link [LNKG] (IRQs 5 10 *11) [ 0.060439] ACPI: PCI Interrupt Link [LNKH] (IRQs 5 10 *11) [ 0.060462] ACPI: PCI Interrupt Link [GSIA] (IRQs *16) [ 0.060468] ACPI: PCI Interrupt Link [GSIB] (IRQs *17) [ 0.060473] ACPI: PCI Interrupt Link [GSIC] (IRQs *18) [ 0.060479] ACPI: PCI Interrupt Link [GSID] (IRQs *19) [ 0.060485] ACPI: PCI Interrupt Link [GSIE] (IRQs *20) [ 0.060490] ACPI: PCI Interrupt Link [GSIF] (IRQs *21) [ 0.060496] ACPI: PCI Interrupt Link [GSIG] (IRQs *22) [ 0.060502] ACPI: PCI Interrupt Link [GSIH] (IRQs *23) lspci -b -vvv | grep IRQ Interrupt: pin ? routed to IRQ 255 Interrupt: pin A routed to IRQ 10 Interrupt: pin A routed to IRQ 11 Interrupt: pin A routed to IRQ 11 Interrupt: pin ? routed to IRQ 255 Interrupt: pin A routed to IRQ 10 Interrupt: pin A routed to IRQ 10 Note: The 255s are the PCIe Host Bridge and the ISA Bridge lspci -vvv | grep IRQ Interrupt: pin A routed to IRQ 21 Interrupt: pin A routed to IRQ 22 Interrupt: pin A routed to IRQ 23 Interrupt: pin A routed to IRQ 26 Interrupt: pin A routed to IRQ 10 Note: The non MSI device is at IRQ 10 00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02) Subsystem: Red Hat, Inc. QEMU Virtual Machine Flags: bus master, fast devsel, latency 0, IRQ 10 I/O ports at 6000 [size=64] cat /proc/interrupts 24: 0 0 0 0 PCI-MSI 49152-edge virtio2-config 25: 1639 0 0 0 PCI-MSI 49153-edge virtio2-req.0 26: 0 0 0 7 PCI-MSI 512000-edge ahci[0000:00:1f.2] 27: 0 0 0 0 PCI-MSI 16384-edge virtio0-config 28: 0 77 0 0 PCI-MSI 16385-edge virtio0-input.0 29: 0 0 1 0 PCI-MSI 16386-edge virtio0-output.0