From: elena.ufimtseva@oracle.com To: qemu-devel@nongnu.org Cc: elena.ufimtseva@oracle.com, fam@euphon.net, swapnil.ingle@nutanix.com, john.g.johnson@oracle.com, kraxel@redhat.com, jag.raman@oracle.com, quintela@redhat.com, mst@redhat.com, armbru@redhat.com, kanth.ghatraju@oracle.com, felipe@nutanix.com, thuth@redhat.com, ehabkost@redhat.com, konrad.wilk@oracle.com, dgilbert@redhat.com, alex.williamson@redhat.com, stefanha@redhat.com, thanos.makatos@nutanix.com, kwolf@redhat.com, berrange@redhat.com, mreitz@redhat.com, ross.lagerwall@citrix.com, marcandre.lureau@gmail.com, pbonzini@redhat.com Subject: [PATCH v14 02/21] multi-process: add configure and usage information Date: Thu, 17 Dec 2020 19:57:49 -0800 [thread overview] Message-ID: <440d33d0add2c9aadbc75416d6c084c2bca0a240.1608263018.git.elena.ufimtseva@oracle.com> (raw) In-Reply-To: <cover.1608263017.git.elena.ufimtseva@oracle.com> From: Elena Ufimtseva <elena.ufimtseva@oracle.com> Adds documentation explaining the command-line arguments needed to use multi-process. Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com> Signed-off-by: Jagannathan Raman <jag.raman@oracle.com> Signed-off-by: John G Johnson <john.g.johnson@oracle.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> --- docs/multi-process.rst | 64 ++++++++++++++++++++++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 65 insertions(+) create mode 100644 docs/multi-process.rst diff --git a/docs/multi-process.rst b/docs/multi-process.rst new file mode 100644 index 0000000000..46bb0cafc2 --- /dev/null +++ b/docs/multi-process.rst @@ -0,0 +1,64 @@ +Multi-process QEMU +================== + +This document describes how to configure and use multi-process qemu. +For the design document refer to docs/devel/qemu-multiprocess. + +1) Configuration +---------------- + +multi-process is enabled by default for targets that enable KVM + + +2) Usage +-------- + +Multi-process QEMU requires an orchestrator to launch. + +Following is a description of command-line used to launch mpqemu. + +* Orchestrator: + + - The Orchestrator creates a unix socketpair + + - It launches the remote process and passes one of the + sockets to it via command-line. + + - It then launches QEMU and specifies the other socket as an option + to the Proxy device object + +* Remote Process: + + - QEMU can enter remote process mode by using the "remote" machine + option. + + - The orchestrator creates a "remote-object" with details about + the device and the file descriptor for the device + + - The remaining options are no different from how one launches QEMU with + devices. + + - Example command-line for the remote process is as follows: + + /usr/bin/qemu-system-x86_64 \ + -machine x-remote \ + -device lsi53c895a,id=lsi0 \ + -drive id=drive_image2,file=/build/ol7-nvme-test-1.qcow2 \ + -device scsi-hd,id=drive2,drive=drive_image2,bus=lsi0.0,scsi-id=0 \ + -object x-remote-object,id=robj1,devid=lsi1,fd=4, + +* QEMU: + + - Since parts of the RAM are shared between QEMU & remote process, a + memory-backend-memfd is required to facilitate this, as follows: + + -object memory-backend-memfd,id=mem,size=2G + + - A "x-pci-proxy-dev" device is created for each of the PCI devices emulated + in the remote process. A "socket" sub-option specifies the other end of + unix channel created by orchestrator. The "id" sub-option must be specified + and should be the same as the "id" specified for the remote PCI device + + - Example commandline for QEMU is as follows: + + -device x-pci-proxy-dev,id=lsi0,socket=3 diff --git a/MAINTAINERS b/MAINTAINERS index c8c29a2814..398973ca91 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3168,6 +3168,7 @@ M: Jagannathan Raman <jag.raman@oracle.com> M: John G Johnson <john.g.johnson@oracle.com> S: Maintained F: docs/devel/multi-process.rst +F: docs/multi-process.rst Build and test automation ------------------------- -- 2.25.GIT
WARNING: multiple messages have this Message-ID (diff)
From: elena.ufimtseva@oracle.com To: qemu-devel@nongnu.org Cc: elena.ufimtseva@oracle.com, fam@euphon.net, swapnil.ingle@nutanix.com, john.g.johnson@oracle.com, kraxel@redhat.com, jag.raman@oracle.com, quintela@redhat.com, mst@redhat.com, armbru@redhat.com, kanth.ghatraju@oracle.com, felipe@nutanix.com, thuth@redhat.com, ehabkost@redhat.com, konrad.wilk@oracle.com, dgilbert@redhat.com, alex.williamson@redhat.com, stefanha@redhat.com, thanos.makatos@nutanix.com, kwolf@redhat.com, berrange@redhat.com, mreitz@redhat.com, ross.lagerwall@citrix.com, marcandre.lureau@gmail.com, pbonzini@redhat.com Subject: [PATCH v14 RESEND 02/21] multi-process: add configure and usage information Date: Thu, 17 Dec 2020 21:20:55 -0800 [thread overview] Message-ID: <440d33d0add2c9aadbc75416d6c084c2bca0a240.1608263018.git.elena.ufimtseva@oracle.com> (raw) Message-ID: <20201218052055.mSjd1UGmWpbRn0HYJo7HMtGMTTETPacL2lo63GMZxoo@z> (raw) In-Reply-To: <cover.1608263017.git.elena.ufimtseva@oracle.com> From: Elena Ufimtseva <elena.ufimtseva@oracle.com> Adds documentation explaining the command-line arguments needed to use multi-process. Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com> Signed-off-by: Jagannathan Raman <jag.raman@oracle.com> Signed-off-by: John G Johnson <john.g.johnson@oracle.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> --- docs/multi-process.rst | 64 ++++++++++++++++++++++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 65 insertions(+) create mode 100644 docs/multi-process.rst diff --git a/docs/multi-process.rst b/docs/multi-process.rst new file mode 100644 index 0000000000..46bb0cafc2 --- /dev/null +++ b/docs/multi-process.rst @@ -0,0 +1,64 @@ +Multi-process QEMU +================== + +This document describes how to configure and use multi-process qemu. +For the design document refer to docs/devel/qemu-multiprocess. + +1) Configuration +---------------- + +multi-process is enabled by default for targets that enable KVM + + +2) Usage +-------- + +Multi-process QEMU requires an orchestrator to launch. + +Following is a description of command-line used to launch mpqemu. + +* Orchestrator: + + - The Orchestrator creates a unix socketpair + + - It launches the remote process and passes one of the + sockets to it via command-line. + + - It then launches QEMU and specifies the other socket as an option + to the Proxy device object + +* Remote Process: + + - QEMU can enter remote process mode by using the "remote" machine + option. + + - The orchestrator creates a "remote-object" with details about + the device and the file descriptor for the device + + - The remaining options are no different from how one launches QEMU with + devices. + + - Example command-line for the remote process is as follows: + + /usr/bin/qemu-system-x86_64 \ + -machine x-remote \ + -device lsi53c895a,id=lsi0 \ + -drive id=drive_image2,file=/build/ol7-nvme-test-1.qcow2 \ + -device scsi-hd,id=drive2,drive=drive_image2,bus=lsi0.0,scsi-id=0 \ + -object x-remote-object,id=robj1,devid=lsi1,fd=4, + +* QEMU: + + - Since parts of the RAM are shared between QEMU & remote process, a + memory-backend-memfd is required to facilitate this, as follows: + + -object memory-backend-memfd,id=mem,size=2G + + - A "x-pci-proxy-dev" device is created for each of the PCI devices emulated + in the remote process. A "socket" sub-option specifies the other end of + unix channel created by orchestrator. The "id" sub-option must be specified + and should be the same as the "id" specified for the remote PCI device + + - Example commandline for QEMU is as follows: + + -device x-pci-proxy-dev,id=lsi0,socket=3 diff --git a/MAINTAINERS b/MAINTAINERS index c8c29a2814..398973ca91 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3168,6 +3168,7 @@ M: Jagannathan Raman <jag.raman@oracle.com> M: John G Johnson <john.g.johnson@oracle.com> S: Maintained F: docs/devel/multi-process.rst +F: docs/multi-process.rst Build and test automation ------------------------- -- 2.25.GIT
next prev parent reply other threads:[~2020-12-18 4:05 UTC|newest] Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-12-18 3:57 [PATCH v14 00/21] Initial support for multi-process Qemu elena.ufimtseva 2020-12-18 3:57 ` [PATCH v14 01/21] multi-process: add the concept description to docs/devel/qemu-multiprocess elena.ufimtseva 2020-12-18 5:20 ` [PATCH v14 RESEND " elena.ufimtseva 2020-12-18 3:57 ` elena.ufimtseva [this message] 2020-12-18 5:20 ` [PATCH v14 RESEND 02/21] multi-process: add configure and usage information elena.ufimtseva 2020-12-18 3:57 ` [PATCH v14 03/21] memory: alloc RAM from file at offset elena.ufimtseva 2020-12-18 5:20 ` [PATCH v14 RESEND " elena.ufimtseva 2020-12-18 3:57 ` [PATCH v14 04/21] socket: export socket_get_fd() function elena.ufimtseva 2020-12-18 5:20 ` [PATCH v14 RESEND " elena.ufimtseva 2020-12-18 11:39 ` [PATCH v14 " Marc-André Lureau 2020-12-18 5:19 ` [PATCH v14 00/21] Initial support for multi-process Qemu Elena Ufimtseva 2020-12-18 5:20 ` [PATCH v14 RESEND " elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 05/21] multi-process: Add config option for multi-process QEMU elena.ufimtseva 2020-12-22 10:22 ` Stefan Hajnoczi 2020-12-18 5:40 ` [PATCH v14 RESEND 06/21] multi-process: setup PCI host bridge for remote device elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 07/21] multi-process: setup a machine object for remote device process elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 08/21] multi-process: add qio channel write function elena.ufimtseva 2020-12-22 10:24 ` Stefan Hajnoczi 2020-12-18 5:40 ` [PATCH v14 RESEND 09/21] multi-process: add qio channel read function elena.ufimtseva 2020-12-22 10:29 ` Stefan Hajnoczi 2020-12-18 5:40 ` [PATCH v14 RESEND 10/21] multi-process: define MPQemuMsg format and transmission functions elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 11/21] multi-process: Initialize message handler in remote device elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 12/21] multi-process: Associate fd of a PCIDevice with its object elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 13/21] multi-process: setup memory manager for remote device elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 14/21] multi-process: introduce proxy object elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 15/21] multi-process: add proxy communication functions elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 16/21] multi-process: Forward PCI config space acceses to the remote process elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 17/21] multi-process: PCI BAR read/write handling for proxy & remote endpoints elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 18/21] multi-process: Synchronize remote memory elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 19/21] multi-process: create IOHUB object to handle irq elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 20/21] multi-process: Retrieve PCI info from remote process elena.ufimtseva 2020-12-18 5:40 ` [PATCH v14 RESEND 21/21] multi-process: perform device reset in the " elena.ufimtseva 2020-12-22 10:38 ` [PATCH v14 00/21] Initial support for multi-process Qemu Stefan Hajnoczi
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