Reports 1-1 of 1 Clear search Modify search
DGS (General)
takahiro.yamamoto - 18:01 Tuesday 12 April 2022 (20464) Print this report
Comment to mx_stream hung up on K1PR2 and K1IY0 (20435)
[Oshino, Ikeda, YamaT]

Though this may not be directly related to the increase of errors on mx_stream, we noticed irqbalance doesn't work well with Hyper Threading on Gentoo servers.
It occurs on k1dc0, k1nds0, k1nds1, and k1fw0 and it's better to fix on the next maintenance day.

----
On k1dc0 and other affected servers, all loads are concentrated to CPU0 as follows.
            CPU0       CPU1       CPU2       CPU3       CPU4       CPU5       CPU6       CPU7       CPU8       CPU9       CPU10      CPU11      
0: 55234 0 0 0 0 0 0 0 0 0 0 0 IO-APIC-edge timer
8: 140 0 0 0 0 0 0 0 0 0 0 0 IO-APIC-edge rtc0
9: 3 0 0 0 0 0 0 0 0 0 0 0 IO-APIC-fasteoi acpi
18: 958961 0 0 0 0 0 0 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb1, ehci_hcd:usb2
72: 13196807 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge ahci
73: 44 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge ahci
74: 0 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0
75: 2545764089 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-TxRx-0
76: 2749653483 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-TxRx-1
77: 2422420500 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-TxRx-2
78: 2478695662 0 0 0 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-TxRx-3
...


On the other hand, k1fw1 and other unaffected servers seem to be able to use all CPU cores as follows.
            CPU0       CPU1       CPU2       CPU3       CPU4       CPU5       
0: 168 5450 0 0 0 0 IO-APIC-edge timer
8: 0 154 0 0 0 0 IO-APIC-edge rtc0
9: 0 3 0 0 0 0 IO-APIC-fasteoi acpi
18: 0 0 183 0 0 0 IO-APIC-fasteoi ehci_hcd:usb1, ehci_hcd:usb2
72: 0 0 0 0 0 539268 PCI-MSI-edge ahci
73: 0 0 0 0 0 41 PCI-MSI-edge ahci
74: 0 0 0 0 0 0 PCI-MSI-edge eth0
75: 0 0 0 0 0 15925231 PCI-MSI-edge eth0-TxRx-0
76: 5239188 0 0 0 0 0 PCI-MSI-edge eth0-TxRx-1
77: 32705758 0 0 0 0 0 PCI-MSI-edge eth0-TxRx-2
78: 0 67699476 0 0 0 0 PCI-MSI-edge eth0-TxRx-3
79: 0 14661393 0 0 0 0 PCI-MSI-edge eth0-TxRx-4
80: 0 0 9937904 0 0 0 PCI-MSI-edge eth0-TxRx-5
88: 0 0 0 0 0 962942 PCI-MSI-edge eth3-TxRx-0
89: 0 0 0 0 0 952423 PCI-MSI-edge eth3-TxRx-1
90: 0 0 0 0 0 736032612 PCI-MSI-edge eth3-TxRx-2
91: 0 0 0 0 0 926493 PCI-MSI-edge eth3-TxRx-3
92: 1143161 0 0 0 0 0 PCI-MSI-edge eth3-TxRx-4
93: 924492 0 0 0 0 0 PCI-MSI-edge eth3-TxRx-5
...


This issue seem to occur on too old version of Linux. On k1nds2 which is the Debian system, loads are dispersed to all CPU cores even if HT is enabled.
Search Help
×

Warning

×