svn commit: r48596 - head/en_US.ISO8859-1/htdocs/news/status
Warren Block <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.cvs.doc |
|---|---|
| Message-ID | <[email protected]> |
Author: wblock Date: Tue Apr 12 22:44:47 2016 New Revision: 48596 URL: https://svnweb.freebsd.org/changeset/doc/48596 Log: Add report on BIS drivers from Dexuan Cui <[email protected]>. Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2016-01-2016-03.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2016-01-2016-03.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2016-01-2016-03.xml Tue Apr 12 22:31:59 2016 (r48595) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2016-01-2016-03.xml Tue Apr 12 22:44:47 2016 (r48596) @@ -1331,4 +1331,173 @@ <help></help> </project> + + <project cat='kern'> + <title>FreeBSD Integration Services (BIS)</title> + + <contact> + <person> + <name> + <given>Sepherosa</given> + <common>Ziehau</common> + </name> + <email>[email protected]</email> + </person> + + <person> + <name> + <given>Howard</given> + <common>Su</common> + </name> + <email>[email protected]</email> + </person> + + <person> + <name> + <given>Hongjiang</given> + <common>Zhang</common> + </name> + <email>[email protected]</email> + </person> + + <person> + <name> + <given>Dexuan</given> + <common>Cui</common> + </name> + <email>[email protected]</email> + </person> + </contact> + + <links> + <url href="https://wiki.FreeBSD.org/HyperV">FreeBSD Virtual Machines on Microsoft Hyper-V</url> + <url href="https://technet.microsoft.com/en-us/library/dn531030.aspx">Supported Linux and FreeBSD virtual machines for Hyper-V on Windows</url> + </links> + + <body> + <p>When &os; virtual machines (VMs) run on Hyper-V, using + Hyper-V synthetic devices is recommended to get the best + network and storage performance and make full use of all the + benefits that Hyper-V provides. The collection of drivers that + are required to use Hyper-V synthetic devices in FreeBSD are + known as FreeBSD Integration Services (BIS). Some of the BIS + drivers (like network and storage drivers) have existed in + FreeBSD 9.x and 10.x for years, but there are still some + performance and stability issues and bugs. Compared with + Windows and Linux VMs, the current BIS lacks some useful + features, e.g., live virtual machine backup, TRIM/Unmap, the + support for UEFI VM (boot from UEFI), etc.</p> + + <p>During the past quarter, we made a great progress on the + performance tuning for Hyper-V network driver. We also + refactored and cleaned up the VMBus driver, and fixed some + important bugs. All the work makes FreeBSD VMs run even better + on Hyper-V and the Hyper-V based cloud platform Azure!</p> + + <p>Our work during 2016Q1 is documented below:</p> + + <p>Optimizing the performance of Hyper-V network driver</p> + + <ul> + <li>We added the LRO (Large Receive Offloading) support to the + driver and properly handled the ACK packets. This + effectively reduced the CPU cycles used in the TCP/IP stack + and dramatically boosted the network performance!</li> + + <li>We enabled the vRSS (virtual Receive Side Scaling) support + for the driver. This greatly improved the network + performance for SMP virtual machine (VM).</li> + + <li>We used a separate Tx kernel thread to relieve the Rx + thread of transmitting packets (the Rx thread tried to + transmit packets after receiving ACKs), so the Rx thread can + receive packets and send ACKs faster.</li> + + <li>Now we can reach a VM-to-VM throughput of 9.1Gbps on a + host with 10Gbps physical NIC, and over 20Gbps on a host + with 40Gbps NIC, and meanwhile the CPUs still have plenty of + cycles for applications.</li> + + <li>We also enabled IP header checksum offloading, and RX + checksum offloading for UDP.</li> + + <li>Further performance tuning is working in progress.</li> + </ul> + + <p>Refactoring and Cleaning up the VMBus driver code</p> + + <ul> + <li>Instead of using swi threads directly, now we use per-CPU + taskqueue_create_fast() threads for event and message + handling, making the code more FreeBSD conventional.</li> + + <li>Made a lot of cleanup to the hv_utils code (HeartBeat, + TimeSync and Shutdown) and we are further cleaning up the + KVP code.</li> + + <li>Used a new message/interrupt slot for Hyper-V timer, so + the handling of timer and non-timer messages can be + distinguished, fixing a potential issue.</li> + + <li>Instead of finding an available IDT vector by hacking, + we're changing to use the normal method, i.e., + lapic_ipi_alloc().</li> + + <li>We're modularizing the Hyper-V modules: 1) they will be + loaded in the loader; 2) we're going to enhance devd(8) to + improve the hot plug case.</li> + </ul> + + <p>Bug Fixing</p> + + <ul> + <li>Fixed the "spurious multiple disks" issue (PR 206630 ??? + FreeBSD 10.2 on Windows 10 and 2016 server may not boot due + to multiple invalid disks issue) in the Hyper-V storage + driver and now FreeBSD VM can reliably boot on Win10 and + 2016 hosts.</li> + + <li>Fixed the OACTIVE issue (PR 207297 - [Hyper-V] FreeBSD + 10.2 on hyperv lost network under heavy load for + OACTIVE).</li> + + <li>Fixed TSC calibration issue (PR 208238 - [Hyper-V] TSC + frequency is not correctly detected: "calcru: runtime went + backwards") and we won't see the "runtime went backwards" + messages anymore!</li> + + <li>Fixed the "very slow terminal" issue of 11-CURRENT by + enabling text mode when we're running on hypervisors.</li> + + <li>Fixed the "unknown dhcp option value 0xf5" issue in + <tt>dhclient(8)</tt> by asking <tt>dhclient(8)</tt> to + ignore the option and &os; VM on Azure can reliably get IP + now.</li> + </ul> + + <p>Found a workaround for PR 20824 ([Hyper-V] VM network may not + work over virtual switch based on wireless NIC): add + "net.link.ether.inet.max_age=60" in /etc/sysctl.conf.</p> + + <p>We plan to add support for live virtual machine backup, + TRIM/Unmap, and UEFI VMs (Hyper-V Generation-2 VMs).</p> + + <p>We published errata (FreeBSD-EN-16:04.hyperv, + FreeBSD-EN-16:05.hv_netvsc) with the Release Engineering team, + so 10.1 and 10.2 users can easily get the fixes of KVP and TCP + checksum by upgrading the system.</p> + + <p>We published BIS test cases for Hyper-V on github: + https://github.com/FreeBSDonHyper-V/Test-BIS and we are going + to publish the test cases for Azure soon.</p> + + <p>This project is sponsored by Microsoft.</p> + </body> + + <sponsor> + Microsoft + </sponsor> + + <help></help> + </project> </report> _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-doc-all To unsubscribe, send any mail to "[email protected]"