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CPU Concurrency Issues 9 messages
Hi all, I'm trying to verify that there are no concurrency issues with an approach I'm using cpu_id as a key to a HASH_MAP. My understanding is that bcc disables preemption but the details are fuzzy a
Hi all, I'm trying to verify that there are no concurrency issues with an approach I'm using cpu_id as a key to a HASH_MAP. My understanding is that bcc disables preemption but the details are fuzzy a
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By
brad.lewis@...
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agenda: IO Visor TSC/Dev Meeting
Hi All, We have the bi-weekly phone conference scheduled for two days from now, does anybody have a discussion topic to add to the agenda? As a reminder, we are planning to hold the meeting only if ag
Hi All, We have the bi-weekly phone conference scheduled for two days from now, does anybody have a discussion topic to add to the agenda? As a reminder, we are planning to hold the meeting only if ag
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By
Brenden Blanco
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agenda: IO Visor TSC/Dev Meeting 5 messages
Hi All, We have the bi-weekly phone conference scheduled for two days from now, does anybody have a discussion topic to add to the agenda? As a reminder, we are planning to hold the meeting only if ag
Hi All, We have the bi-weekly phone conference scheduled for two days from now, does anybody have a discussion topic to add to the agenda? As a reminder, we are planning to hold the meeting only if ag
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By
Brenden Blanco
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Does bpf_redirect_map support redirect packet to bridge device or veth which master is a bridge?
Hi all, I attach an XDP prog(SKB mode) to host net device(enp0s9) and the prog will redirect packet to veth device. If there's only veth device, I can redirect packet into netns through veth device in
Hi all, I attach an XDP prog(SKB mode) to host net device(enp0s9) and the prog will redirect packet to veth device. If there's only veth device, I can redirect packet into netns through veth device in
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By
Forrest Chen
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sockmap redirect doesn't work all the time 5 messages
Hi all, Recently I've been testing with ebpf sockmap. I know that after setting the sock fd in sockmap, the data send to this socket can redirect to another socket that register in the sockmap. I rewr
Hi all, Recently I've been testing with ebpf sockmap. I know that after setting the sock fd in sockmap, the data send to this socket can redirect to another socket that register in the sockmap. I rewr
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By
Forrest Chen
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[PATCHv5 RFC 1/3] BPF: New helper to obtainnamespace data from current task. 2 messages
Hi Yonghong, I had time yesterday to finish the code to avoid using getname_kernel , self-tests run ok with expected results. Here is the current code to avoid the getname_kernel call. diff --git a/ke
Hi Yonghong, I had time yesterday to finish the code to avoid using getname_kernel , self-tests run ok with expected results. Here is the current code to avoid the getname_kernel call. diff --git a/ke
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By
neirac
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[PATCHv5 RFC 1/3] BPF: New helper to obtain namespace data from current task. 16 messages
As a bpf program cannot sleep, I needed to add a spinlock to kern_path, as it calls getname_kernel() which may sleep. The inode is accessed directly, as we are just interested in the inode's s_dev. Le
As a bpf program cannot sleep, I needed to add a spinlock to kern_path, as it calls getname_kernel() which may sleep. The inode is accessed directly, as we are just interested in the inode's s_dev. Le
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By
neirac
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AF_XDP query 3 messages
Hi, Is it possible to have 2 processes each with its own AF_XDP socket and its own UMEM? Thanks, Kanthi
Hi, Is it possible to have 2 processes each with its own AF_XDP socket and its own UMEM? Thanks, Kanthi
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By
Kanthi P
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the size of BPF_MAP_TYPE_PERCPU_ARRAY doesn't match the number of CPU 5 messages
Hi all, I define a BPF_MAP_TYPE_PERCPU_ARRAY and use it to count packets in the xdp program. When I read the map from userspace program, I find that the entry number doesn't match local CPU numbers. I
Hi all, I define a BPF_MAP_TYPE_PERCPU_ARRAY and use it to count packets in the xdp program. When I read the map from userspace program, I find that the entry number doesn't match local CPU numbers. I
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By
Forrest Chen
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agenda: IO Visor TSC/Dev Meeting 2 messages
Hi All, We have the bi-weekly phone conference scheduled for two days from now, does anybody have a discussion topic to add to the agenda? As a reminder, we are planning to hold the meeting only if ag
Hi All, We have the bi-weekly phone conference scheduled for two days from now, does anybody have a discussion topic to add to the agenda? As a reminder, we are planning to hold the meeting only if ag
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By
Brenden Blanco
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[PATCH] Report proper module on kernel backtrace 2 messages
Raghavendra Rao reported that memleak does not display proper name of the related kernel module, but just the "kernel" string, like here for xfs module functions: 131072 bytes in 4 allocations from st
Raghavendra Rao reported that memleak does not display proper name of the related kernel module, but just the "kernel" string, like here for xfs module functions: 131072 bytes in 4 allocations from st
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By
Jiri Olsa
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math between pkt pointer and register with unbounded min value is not allowed 14 messages
#verifier
I'm playing with bcc to prototype an UDP load balancer. I'm facing an issue that I didn't succeed to understand... In my code I tried to validate my UDP packet using code like this : struct udphdr *ud
I'm playing with bcc to prototype an UDP load balancer. I'm facing an issue that I didn't succeed to understand... In my code I tried to validate my UDP packet using code like this : struct udphdr *ud
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By
Simon
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BPF tracing book
G'Day, Many of you already know (and have been helping, thanks) and we've discussed this on the iovisor call before: my book is finally launched properly. Some URLs: http://www.brendangregg.com/blog/2
G'Day, Many of you already know (and have been helping, thanks) and we've discussed this on the iovisor call before: my book is finally launched properly. Some URLs: http://www.brendangregg.com/blog/2
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By
Brendan Gregg
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Linux Plumbers BPF micro-conference CFP (reminder)
This is a call for proposals for the BPF micro-conference at this years' Linux Plumbers Conference (LPC) 2019 which will be held in Lisbon, Portugal for September 9-11. The goal of the BPF micro-confe
This is a call for proposals for the BPF micro-conference at this years' Linux Plumbers Conference (LPC) 2019 which will be held in Lisbon, Portugal for September 9-11. The goal of the BPF micro-confe
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By
Daniel Borkmann
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Go-bpf with TC
Hi, Can anyone help me with an example of a GO-bpf program using TC Thanks, Kanthi
Hi, Can anyone help me with an example of a GO-bpf program using TC Thanks, Kanthi
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By
Kanthi P
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[agenda] IO Visor TSC/Dev Meeting 3 messages
Hi All, As per the discussion from last meeting, this week's meeting will be provisional on having a proposed agenda rather than free-form. Therefore, please reply if there is a topic that you would l
Hi All, As per the discussion from last meeting, this week's meeting will be provisional on having a proposed agenda rather than free-form. Therefore, please reply if there is a topic that you would l
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Brenden Blanco
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bpftrace v0.9.1
We just released bpftrace v0.9.1. This turned into a pretty big release, with almost 200 commits and 3 months since v0.9.0. We'll try to have smaller development cycles for the next releases. Some hig
We just released bpftrace v0.9.1. This turned into a pretty big release, with almost 200 commits and 3 months since v0.9.0. We'll try to have smaller development cycles for the next releases. Some hig
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By
Matheus Marchini
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Performance of veth XDP 3 messages
In https://lists.iovisor.org/g/iovisor-dev/topic/how_to_make_redirect_map/31867035 I have built up an environment to make veth+XDP work. There're some question when I do some performance test 1. When
In https://lists.iovisor.org/g/iovisor-dev/topic/how_to_make_redirect_map/31867035 I have built up an environment to make veth+XDP work. There're some question when I do some performance test 1. When
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By
Forrest Chen
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bpf_probe_read() split: bpftrace RFC 2 messages
G'Day, This is the biggest change afoot to the bpftrace API, and I think we can sort it out quickly without fuss, but it is worth sharing here. This is from https://github.com/iovisor/bpftrace/issues/
G'Day, This is the biggest change afoot to the bpftrace API, and I think we can sort it out quickly without fuss, but it is worth sharing here. This is from https://github.com/iovisor/bpftrace/issues/
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By
Brendan Gregg
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BPF Virtual Machine Runtime 4 messages
Following on from the call... Does this sound even better? (mapping from the JVM for comparison): The JVM is a specification of a virtual machine that runs Java bytecode. It is implemented by a Java R
Following on from the call... Does this sound even better? (mapping from the JVM for comparison): The JVM is a specification of a virtual machine that runs Java bytecode. It is implemented by a Java R
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Brendan Gregg
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