mirror of
https://github.com/torvalds/linux.git
synced 2026-07-29 18:51:21 +02:00
Linux kernel source tree
3361a6eae5
Luigi Leonardi says: ==================== vsock: avoid queuing on intermediate queue if possible This series introduces an optimization for vsock/virtio to reduce latency and increase the throughput: When the guest sends a packet to the host, and the intermediate queue (send_pkt_queue) is empty, if there is enough space, the packet is put directly in the virtqueue. v3->v4 While running experiments on fio with 64B payload, I realized that there was a mistake in my fio configuration, so I re-ran all the experiments and now the latency numbers are indeed lower with the patch applied. I also noticed that I was kicking the host without the lock. - Fixed a configuration mistake on fio and re-ran all experiments. - Fio latency measurement using 64B payload. - virtio_transport_send_skb_fast_path sends kick with the tx_lock acquired - Addressed all minor style changes requested by maintainer. - Rebased on latest net-next - Link to v3: https://lore.kernel.org/r/20240711-pinna-v3-0-697d4164fe80@outlook.com v2->v3 - Performed more experiments using iperf3 using multiple streams - Handling of reply packets removed from virtio_transport_send_skb, as is needed just by the worker. - Removed atomic_inc/atomic_sub when queuing directly to the vq. - Introduced virtio_transport_send_skb_fast_path that handles the steps for sending on the vq. - Fixed a missing mutex_unlock in error path. - Changed authorship of the second commit - Rebased on latest net-next v1->v2 In this v2 I replaced a mutex_lock with a mutex_trylock because it was insidea RCU critical section. I also added a check on tx_run, so if the module is being removed the packet is not queued. I'd like to thank Stefano for reporting the tx_run issue. Applied all Stefano's suggestions: - Minor code style changes - Minor commit text rewrite Performed more experiments: - Check if all the packets go directly to the vq (Matias' suggestion) - Used iperf3 to see if there is any improvement in overall throughput from guest to host - Pinned the vhost process to a pCPU. - Run fio using 512B payload Rebased on latest net-next ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.