How to configure logrotate to just delete all files under selected directory once a week?
I'm testing the following:
/var/spool/mydir/* {
daily rotate 0 nocompress copytruncate }
But it doesn't seem to remove anything. Should I wait one day?
Thank you.
I would like to obtain information about interrupts assigned to my network cards. Is there any other way, than /proc/interrupts?
When I look at /proc/interrupts:
$ cat /proc/interrupts
CPU0 CPU1
(...)
12: 4 0 IO-APIC-edge i8042
14: 145 65310875 IO-APIC-edge ide0
50: 0 0 IO-APIC-level uhci_hcd:usb5, Intel ICH7
58: 5388 7983508 IO-APIC-level libata
169: 812427252 1236572641 IO-APIC-level skge, eth1
217: 6 0 IO-APIC-level ehci_hcd:usb1, uhci_hcd:usb2
225: 0 0 IO-APIC-level uhci_hcd:usb3
233: 60 3108720778 IO-APIC-level uhci_hcd:usb4, skge
I can see two skge and one eth1 entries. All of them are the network cards. Because of the general name "skge" (which is the name of the network driver of the card) I can't easily reocognize, which NIC occupies which interrupt.
How to make linux use more descriptive names in the entries?
Or: Is there any alternative way to obtain INT information instead of /proc/interrupt?
My final goal is to manipulate smp_affinities of the NICs.
I'm wondering about the fact, that PCI architecture is hierarchical. Therefore, even if I have two PCIx4 slots, it's possible that I will not be able to fully utilize it, because the slots will connect in one node, which can have bandwidth insufficient to handle 2x PCIex4.
The background for my question is: I'm trying to utilize eight PCIe 1GBit interfaces. I have two cards packed with 2 ports, and one card packed with 4 ports. I'm able to get the maximum on 4 NIC interfaces. After activating 5th port, the performance slightly drops on each five interfaces. The same after activating 6th, 7th and 8ht interface.
Main question is: How to obtain PCIe structure on a machine, "draw" it, see it's nodes and connections, and deduce weakest node in that tree?
I have PCIe x4 NIC plugged into PCIe x16 slot. I have read, that even though it should run in x4 mode, it's not guaranteed: the network card can run in backward compatibility 1x mode. How to verify this under Linux?
Is it possible to plug in PCIe x4 NIC into PCIe x16 slot?
On my workstation I got only two PCI-MSI interrupts in /proc/interrupts:
0: 11726919 0 IO-APIC-edge timer
1: 3 0 IO-APIC-edge i8042
7: 0 0 IO-APIC-edge parport0
8: 1 0 IO-APIC-edge rtc
9: 0 0 IO-APIC-level acpi
12: 4 0 IO-APIC-edge i8042
58: 13 94016 PCI-MSI eth0
169: 843271 71766622 IO-APIC-level uhci_hcd:usb3, eth1, HDA Intel
201: 1 0 IO-APIC-level uhci_hcd:usb4, uhci_hcd:usb6
209: 0 0 IO-APIC-level ehci_hcd:usb1
217: 2 0 IO-APIC-level ehci_hcd:usb2, uhci_hcd:usb5
225: 27 72309141 IO-APIC-level uhci_hcd:usb7, eth2
233: 6683 103839 PCI-MSI ahci
NMI: 2236 4056
LOC: 11696665 11696593
ERR: 0
MIS: 0
On other, much stronger RACK Dell machine (8 cores), there are seven such interrupts.
Does this depend on number of processors? Is IO-APIC-level a software interrupt?
I want to assign PCI-MSI interrupts to my network cards to improve performance.
I'm using driver e1000e for multiple Intel network cards (Intel EXPI9402PT, based on 82571EB chip). The problem is that when I'm trying to utilize maximum speed (1GB) on more than one interface, speed on each interface starts to drop down.
For one interface I get: 120435948 bytes/sec.
For two interfaces I get: 61080233 bytes/sec and 60515294 bytes/sec.
For three interfaces I get: 28564020 bytes/sec, 27111184 bytes/sec, 27118907 bytes/sec.
What can be the cause?
EDIT: /proc/interrupts content:
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7
106: 17138 0 0 0 0 0 0 0 PCI-MSI eth0
114: 51 0 0 0 102193 0 20 23745467 PCI-MSI eth2
122: 51 290 15 271 0 9253 100 0 PCI-MSI eth3
130: 43 367 0 290 105 39 15 0 PCI-MSI eth4
138: 43 361 105 210 0 140 0 0 PCI-MSI eth5
146: 56 67625 100 0 0 17855245 0 0 PCI-MSI eth6
I'm trying to utilize maximal bandwidth provided by my 1GiB network card, but it's always limited to 80MiB (real megabytes). What can be the reason? Card description (lshw output):
description: Ethernet interface
product: DGE-530T Gigabit Ethernet Adapter (rev 11)
vendor: D-Link System Inc
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth1
version: 11
serial: 00:22:b0:68:70:41
size: 1GB/s
capacity: 1GB/s
width: 32 bits
clock: 66MHz
capabilities: pm vpd bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
The card is placed in following PCI slot:
*-pci:2
description: PCI bridge
product: 82801 PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: 92
width: 32 bits
clock: 33MHz
capabilities: pci subtractive_decode bus_master cap_list
The PCI isn't any PCI Express right? It's a legacy PCI slot? So maybe this is the reason?
OS is a linux.