Min Zhou

software engineer, husband, father of 2 boys

[Min Zhou @minzhou]

perf probe --add 'ondemand_readahead parent=+0(+40(+24(+24(%dx)))):string filename=+0(+40(+24(%dx))):string offset=%r8:u64 req_size=%r9:u64'

[Min Zhou @minzhou]

https://t.co/j2G05CthXj

[Min Zhou @minzhou]

Advanced Kubernetes Operators Development by Stefanie Lai in @startitup_ https://t.co/EdFBRzoGhv

[Min Zhou @minzhou]

Kubernetes Operator for Beginners — What, Why, How by Stefanie Lai in @startitup_ https://t.co/NDb8zklPin

[Min Zhou @minzhou]

Advanced Kubernetes Operator Development with Finalizer, Informer, and Webhook by Stefanie Lai https://t.co/Css4bN5ZlD

[Min Zhou @minzhou]

@smallfishxy 所以java用了device_id+inode to identify a file.

[Min Zhou @minzhou]

13年前?

[albertlee @hanzhupeng]

今天给团队做Erlang/Elixir 的培训讲座，翻出了这张照片。青葱岁月啊。

[Min Zhou @minzhou]

Might be a good vhost-user-net candidate for #firecracker or #rust-vmm : https://t.co/kt6bv4byjU . None of the vmms support vhost-user-net yet.

[Min Zhou @minzhou]

ha, vpp invents its own wheel for CLB. https://t.co/LkSw1moDF3

[Min Zhou @minzhou]

Envoy + F-Stack, open source answer for AWS ALB. Both of them are DPDK empowered. VPP should be better than F-stack for the purpose. https://t.co/dJX2qyXxPP

[Min Zhou @minzhou]

#spdk bdev_split_create to split one NVMe device to multiple, NMVe-oF to create cloud storage pool with much lower latency and higher throughput than EBS.

[Min Zhou @minzhou]

A infamous feature of the NVMe protocol is namespaces. Namespaces allow u to carve an SSD into logically separate smaller drives, like partitions. But, unlike partitions, namespaces each have their own submission and completion queues allowing for highly parallelized operations.

[Min Zhou @minzhou]

@ClashofClans Horrible customer service! I asked through in-app support 3 times for transferring my account from supercell id because I can't login from China. It turned out my account got locked without any permission from me or notification to me!

[Min Zhou @minzhou]

@ClashofClans @Cream_EsportsGG Horrible customer service! I asked through in-app support 3 times for transferring my account from supercell id because I can't login from China. It turned out my account got locked without any permission from me or notification to me!

[Min Zhou @minzhou]

page_fault (precisely handle_mm_fault) counts and latency in nsecs histogram via ply/ebpf.

[Min Zhou @minzhou]

how [ku]probes parse arg ? kernel/trace/trace_probe.c: parse_probe_arg()

[Min Zhou @minzhou]

another way to trace vfs_read(filename) $ sudo /usr/local/sbin/ply -c 'kprobe:vfs_read{ printf("%v: %v\n", comm(), mem(mem(mem(arg(0)+24, "p")+40, "p"), "s")); }'

[Min Zhou @minzhou]

Perf to trace linux readahead: sudo perf probe --add 'ondemand_readahead greatgrandparent=+0(+40(+24(+24(+24(+24(%dx)))))):string filename=+0(+40(+24(%dx))):string offset=%r8:x64 req_size=%r9:x64'

[Min Zhou @minzhou]

eBPF Trace from Kernel to Userspace #ebpf #kernel https://t.co/jMIHu47rHK via @SlideShare

[Min Zhou @minzhou]

@normanmaurer thinking about contributing netty a lib of netlink which is the cornerstone of cloud networking, will u be interested in that?