mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
synced 2025-01-22 04:25:21 +00:00
vhost_user_fs: Process requests in parallel with a thread pool
This change enables vhost_user_fs to process multiple requests in parallel by scheduling them into a ThreadPool (from the Futures crate). Parallelism on a single file is limited by the nature of the operation executed on it. A recent commit replaced the Mutex that protects the File within HandleData with a RwLock, to allow some operations (at this moment, only "read" and "write") to proceed in parallel by acquiring a read lock. A more complex approach was also implemented [1], involving instrumentation through vhost_user_backend to be able to serialize completions, reducing the pressure on the vring RwLock. This strategy improved the performance on some corner cases, while making it worse on other, more common ones. This fact, in addition to it requiring wider changes through the source code, prompted me to drop it in favor of this one. [1] https://github.com/slp/cloud-hypervisor/tree/vuf_async Signed-off-by: Sergio Lopez <slp@redhat.com>
This commit is contained in:
Sergio Lopez
Rob Bradford
parent
90309b5106
commit
710520e9a1
132
Cargo.lock
generated
132
Cargo.lock
generated
@ -161,6 +161,7 @@ dependencies = [
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"credibility 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"dirs 2.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"epoll 4.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.67 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -282,6 +283,89 @@ name = "fuchsia-cprng"
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version = "0.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "futures"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"futures-channel 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-executor 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-io 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "futures-channel"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "futures-core"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "futures-executor"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "futures-io"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "futures-macro"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
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"proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"syn 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "futures-sink"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "futures-task"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "futures-util"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"futures-channel 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-io 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-macro 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
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"proc-macro-nested 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "getrandom"
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version = "0.1.14"
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@ -445,6 +529,15 @@ dependencies = [
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"vmm-sys-util 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "num_cpus"
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version = "1.12.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"hermit-abi 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.67 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "openssl-sys"
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version = "0.9.54"
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@ -492,6 +585,11 @@ dependencies = [
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"vm-memory 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "pin-utils"
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version = "0.1.0-alpha.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "pkg-config"
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version = "0.3.17"
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@ -583,6 +681,21 @@ name = "ppv-lite86"
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version = "0.2.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "proc-macro-hack"
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version = "0.5.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"syn 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "proc-macro-nested"
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version = "0.1.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "proc-macro2"
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version = "1.0.9"
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@ -806,6 +919,11 @@ dependencies = [
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"libc 0.2.67 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "slab"
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version = "0.4.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "smallvec"
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version = "1.2.0"
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@ -1273,6 +1391,15 @@ dependencies = [
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"checksum failure 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "b8529c2421efa3066a5cbd8063d2244603824daccb6936b079010bb2aa89464b"
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"checksum failure_derive 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "030a733c8287d6213886dd487564ff5c8f6aae10278b3588ed177f9d18f8d231"
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"checksum fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
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"checksum futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5c329ae8753502fb44ae4fc2b622fa2a94652c41e795143765ba0927f92ab780"
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"checksum futures-channel 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f0c77d04ce8edd9cb903932b608268b3fffec4163dc053b3b402bf47eac1f1a8"
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"checksum futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f25592f769825e89b92358db00d26f965761e094951ac44d3663ef25b7ac464a"
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"checksum futures-executor 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f674f3e1bcb15b37284a90cedf55afdba482ab061c407a9c0ebbd0f3109741ba"
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"checksum futures-io 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "a638959aa96152c7a4cddf50fcb1e3fede0583b27157c26e67d6f99904090dc6"
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"checksum futures-macro 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "9a5081aa3de1f7542a794a397cde100ed903b0630152d0973479018fd85423a7"
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"checksum futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "3466821b4bc114d95b087b850a724c6f83115e929bc88f1fa98a3304a944c8a6"
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"checksum futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7b0a34e53cf6cdcd0178aa573aed466b646eb3db769570841fda0c7ede375a27"
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"checksum futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "22766cf25d64306bedf0384da004d05c9974ab104fcc4528f1236181c18004c5"
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"checksum getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
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"checksum glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "8be18de09a56b60ed0edf84bc9df007e30040691af7acd1c41874faac5895bfb"
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"checksum hermit-abi 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "1010591b26bbfe835e9faeabeb11866061cc7dcebffd56ad7d0942d0e61aefd8"
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@ -1291,9 +1418,11 @@ dependencies = [
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"checksum log 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "1b9ad466a945c9c40f6f9a449c55675547e59bc75a2722d4689042ab3ae80c9c"
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"checksum memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
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"checksum micro_http 0.1.0 (git+https://github.com/firecracker-microvm/micro-http)" = "<none>"
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"checksum num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "46203554f085ff89c235cd12f7075f3233af9b11ed7c9e16dfe2560d03313ce6"
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"checksum openssl-sys 0.9.54 (registry+https://github.com/rust-lang/crates.io-index)" = "1024c0a59774200a555087a6da3f253a9095a5f344e353b212ac4c8b8e450986"
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"checksum parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "92e98c49ab0b7ce5b222f2cc9193fc4efe11c6d0bd4f648e374684a6857b1cfc"
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"checksum parking_lot_core 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7582838484df45743c8434fbff785e8edf260c28748353d44bc0da32e0ceabf1"
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"checksum pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5894c618ce612a3fa23881b152b608bafb8c56cfc22f434a3ba3120b40f7b587"
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"checksum pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)" = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
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"checksum pnet 0.25.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5c08c2c6c26481fcbe49dc4405baedf47151f859c5a45d3f254c2ff74ce51cf0"
|
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"checksum pnet_base 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4df28acf2fcc77436dd2b91a9a0c2bb617f9ca5f2acefee1a4135058b9f9801f"
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@ -1304,6 +1433,8 @@ dependencies = [
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"checksum pnet_sys 0.25.0 (registry+https://github.com/rust-lang/crates.io-index)" = "82f881a6d75ac98c5541db6144682d1773bb14c6fc50c6ebac7086c8f7f23c29"
|
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"checksum pnet_transport 0.25.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1b75ccaee7b5daba9f9a7d47bceeb73cc32edde9952dc5409460d6621ec667b6"
|
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"checksum ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
|
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"checksum proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)" = "ecd45702f76d6d3c75a80564378ae228a85f0b59d2f3ed43c91b4a69eb2ebfc5"
|
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"checksum proc-macro-nested 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "369a6ed065f249a159e06c45752c780bda2fb53c995718f9e484d08daa9eb42e"
|
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"checksum proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)" = "6c09721c6781493a2a492a96b5a5bf19b65917fe6728884e7c44dd0c60ca3435"
|
||||
"checksum quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2bdc6c187c65bca4260c9011c9e3132efe4909da44726bad24cf7572ae338d7f"
|
||||
"checksum rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "552840b97013b1a26992c11eac34bdd778e464601a4c2054b5f0bff7c6761293"
|
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@ -1330,6 +1461,7 @@ dependencies = [
|
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"checksum serde_json 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)" = "9371ade75d4c2d6cb154141b9752cf3781ec9c05e0e5cf35060e1e70ee7b9c25"
|
||||
"checksum signal-hook 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "10b9f3a1686a29f53cfd91ee5e3db3c12313ec02d33765f02c1a9645a1811e2c"
|
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"checksum signal-hook-registry 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "94f478ede9f64724c5d173d7bb56099ec3e2d9fc2774aac65d34b8b890405f41"
|
||||
"checksum slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
|
||||
"checksum smallvec 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5c2fb2ec9bcd216a5b0d0ccf31ab17b5ed1d627960edff65bbe95d3ce221cefc"
|
||||
"checksum ssh2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "eb1a0bdfb47e1fa1eb80f67c7909cfddab49d4262025aa9e4f6e9c39ad77b482"
|
||||
"checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
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@ -10,6 +10,7 @@ build = "build.rs"
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arc-swap = ">=0.4.4"
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clap = { version = "2.33.0", features=["wrap_help"] }
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epoll = ">=4.0.1"
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futures = { version = "0.3.4", features = ["thread-pool"] }
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lazy_static = "1.4.0"
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libc = "0.2.67"
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log = { version = "0.4.10", features = ["std"] }
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@ -11,6 +11,7 @@ extern crate vm_virtio;
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use clap::{App, Arg};
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use epoll;
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use futures::executor::{ThreadPool, ThreadPoolBuilder};
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use libc::EFD_NONBLOCK;
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use log::*;
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use std::num::Wrapping;
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@ -30,11 +31,13 @@ use virtio_bindings::bindings::virtio_net::*;
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use virtio_bindings::bindings::virtio_ring::{
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VIRTIO_RING_F_EVENT_IDX, VIRTIO_RING_F_INDIRECT_DESC,
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};
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use vm_memory::GuestMemoryMmap;
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use vm_memory::{GuestAddressSpace, GuestMemoryAtomic, GuestMemoryMmap};
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use vm_virtio::queue::DescriptorChain;
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use vmm_sys_util::eventfd::EventFd;
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const QUEUE_SIZE: usize = 1024;
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const NUM_QUEUES: usize = 2;
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const THREAD_POOL_SIZE: usize = 64;
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// The guest queued an available buffer for the high priority queue.
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const HIPRIO_QUEUE_EVENT: u16 = 0;
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@ -50,6 +53,8 @@ type VhostUserBackendResult<T> = std::result::Result<T, std::io::Error>;
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enum Error {
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/// Failed to create kill eventfd.
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CreateKillEventFd(io::Error),
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/// Failed to create thread pool.
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CreateThreadPool(io::Error),
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/// Failed to handle event other than input event.
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HandleEventNotEpollIn,
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/// Failed to handle unknown event.
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@ -62,8 +67,6 @@ enum Error {
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QueueReader(VufDescriptorError),
|
||||
/// Creating a queue writer failed.
|
||||
QueueWriter(VufDescriptorError),
|
||||
/// Signaling queue failed.
|
||||
SignalQueue(io::Error),
|
||||
}
|
||||
|
||||
impl fmt::Display for Error {
|
||||
@ -81,12 +84,13 @@ impl convert::From<Error> for io::Error {
|
||||
}
|
||||
|
||||
struct VhostUserFsBackend<F: FileSystem + Send + Sync + 'static> {
|
||||
mem: Option<GuestMemoryMmap>,
|
||||
mem: Option<GuestMemoryAtomic<GuestMemoryMmap>>,
|
||||
kill_evt: EventFd,
|
||||
server: Arc<Server<F>>,
|
||||
// handle request from slave to master
|
||||
vu_req: Option<SlaveFsCacheReq>,
|
||||
event_idx: bool,
|
||||
pool: ThreadPool,
|
||||
}
|
||||
|
||||
impl<F: FileSystem + Send + Sync + 'static> Clone for VhostUserFsBackend<F> {
|
||||
@ -97,46 +101,75 @@ impl<F: FileSystem + Send + Sync + 'static> Clone for VhostUserFsBackend<F> {
|
||||
server: self.server.clone(),
|
||||
vu_req: self.vu_req.clone(),
|
||||
event_idx: self.event_idx,
|
||||
pool: self.pool.clone(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<F: FileSystem + Send + Sync + 'static> VhostUserFsBackend<F> {
|
||||
fn new(fs: F) -> Result<Self> {
|
||||
fn new(fs: F, thread_pool_size: usize) -> Result<Self> {
|
||||
Ok(VhostUserFsBackend {
|
||||
mem: None,
|
||||
kill_evt: EventFd::new(EFD_NONBLOCK).map_err(Error::CreateKillEventFd)?,
|
||||
server: Arc::new(Server::new(fs)),
|
||||
vu_req: None,
|
||||
event_idx: false,
|
||||
pool: ThreadPoolBuilder::new()
|
||||
.pool_size(thread_pool_size)
|
||||
.create()
|
||||
.map_err(Error::CreateThreadPool)?,
|
||||
})
|
||||
}
|
||||
|
||||
fn process_queue(&mut self, vring: &mut Vring) -> Result<bool> {
|
||||
fn process_queue(&mut self, vring_lock: Arc<RwLock<Vring>>) -> Result<bool> {
|
||||
let mut used_any = false;
|
||||
let mem = self.mem.as_ref().ok_or(Error::NoMemoryConfigured)?;
|
||||
let (atomic_mem, mem) = match &self.mem {
|
||||
Some(m) => (m, m.memory()),
|
||||
None => return Err(Error::NoMemoryConfigured),
|
||||
};
|
||||
let mut vring = vring_lock.write().unwrap();
|
||||
|
||||
while let Some(avail_desc) = vring.mut_queue().iter(&mem).next() {
|
||||
let head_index = avail_desc.index;
|
||||
let reader = Reader::new(mem, avail_desc.clone()).map_err(Error::QueueReader)?;
|
||||
let writer = Writer::new(mem, avail_desc.clone()).map_err(Error::QueueWriter)?;
|
||||
used_any = true;
|
||||
|
||||
self.server
|
||||
.handle_message(reader, writer, self.vu_req.as_mut())
|
||||
.map_err(Error::ProcessQueue)?;
|
||||
if self.event_idx {
|
||||
if let Some(used_idx) = vring.mut_queue().add_used(mem, head_index, 0) {
|
||||
if vring.needs_notification(&mem, Wrapping(used_idx)) {
|
||||
vring.signal_used_queue().map_err(Error::SignalQueue)?;
|
||||
// Prepare a set of objects that can be moved to the worker thread.
|
||||
let desc_head = avail_desc.get_head();
|
||||
let atomic_mem = atomic_mem.clone();
|
||||
let server = self.server.clone();
|
||||
let mut vu_req = self.vu_req.clone();
|
||||
let event_idx = self.event_idx;
|
||||
let vring_lock = vring_lock.clone();
|
||||
|
||||
self.pool.spawn_ok(async move {
|
||||
let mem = atomic_mem.memory();
|
||||
let desc = DescriptorChain::new_from_head(&mem, desc_head).unwrap();
|
||||
let head_index = desc.index;
|
||||
|
||||
let reader = Reader::new(&mem, desc.clone())
|
||||
.map_err(Error::QueueReader)
|
||||
.unwrap();
|
||||
let writer = Writer::new(&mem, desc.clone())
|
||||
.map_err(Error::QueueWriter)
|
||||
.unwrap();
|
||||
|
||||
server
|
||||
.handle_message(reader, writer, vu_req.as_mut())
|
||||
.map_err(Error::ProcessQueue)
|
||||
.unwrap();
|
||||
|
||||
let mut vring = vring_lock.write().unwrap();
|
||||
|
||||
if event_idx {
|
||||
if let Some(used_idx) = vring.mut_queue().add_used(&mem, head_index, 0) {
|
||||
if vring.needs_notification(&mem, Wrapping(used_idx)) {
|
||||
vring.signal_used_queue().unwrap();
|
||||
}
|
||||
}
|
||||
used_any = true;
|
||||
} else {
|
||||
vring.mut_queue().add_used(&mem, head_index, 0);
|
||||
vring.signal_used_queue().unwrap();
|
||||
}
|
||||
} else {
|
||||
vring.mut_queue().add_used(mem, head_index, 0);
|
||||
vring.signal_used_queue().map_err(Error::SignalQueue)?;
|
||||
used_any = true;
|
||||
}
|
||||
vring.signal_used_queue().map_err(Error::SignalQueue)?;
|
||||
});
|
||||
}
|
||||
|
||||
Ok(used_any)
|
||||
@ -168,7 +201,7 @@ impl<F: FileSystem + Send + Sync + 'static> VhostUserBackend for VhostUserFsBack
|
||||
}
|
||||
|
||||
fn update_memory(&mut self, mem: GuestMemoryMmap) -> VhostUserBackendResult<()> {
|
||||
self.mem = Some(mem);
|
||||
self.mem = Some(GuestMemoryAtomic::new(mem));
|
||||
Ok(())
|
||||
}
|
||||
|
||||
@ -182,14 +215,19 @@ impl<F: FileSystem + Send + Sync + 'static> VhostUserBackend for VhostUserFsBack
|
||||
return Err(Error::HandleEventNotEpollIn.into());
|
||||
}
|
||||
|
||||
let mut vring = match device_event {
|
||||
let mem = match &self.mem {
|
||||
Some(m) => m.memory(),
|
||||
None => return Err(Error::NoMemoryConfigured.into()),
|
||||
};
|
||||
|
||||
let vring_lock = match device_event {
|
||||
HIPRIO_QUEUE_EVENT => {
|
||||
debug!("HIPRIO_QUEUE_EVENT");
|
||||
vrings[0].write().unwrap()
|
||||
vrings[0].clone()
|
||||
}
|
||||
REQ_QUEUE_EVENT => {
|
||||
debug!("QUEUE_EVENT");
|
||||
vrings[1].write().unwrap()
|
||||
vrings[1].clone()
|
||||
}
|
||||
_ => return Err(Error::HandleEventUnknownEvent.into()),
|
||||
};
|
||||
@ -200,16 +238,17 @@ impl<F: FileSystem + Send + Sync + 'static> VhostUserBackend for VhostUserFsBack
|
||||
// calling process_queue() until it stops finding new
|
||||
// requests on the queue.
|
||||
loop {
|
||||
vring
|
||||
.mut_queue()
|
||||
.update_avail_event(self.mem.as_ref().ok_or(Error::NoMemoryConfigured)?);
|
||||
if !self.process_queue(&mut vring)? {
|
||||
{
|
||||
let mut vring = vring_lock.write().unwrap();
|
||||
vring.mut_queue().update_avail_event(&mem);
|
||||
}
|
||||
if !self.process_queue(vring_lock.clone())? {
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// Without EVENT_IDX, a single call is enough.
|
||||
self.process_queue(&mut vring)?;
|
||||
self.process_queue(vring_lock)?;
|
||||
}
|
||||
|
||||
Ok(false)
|
||||
@ -243,6 +282,13 @@ fn main() {
|
||||
.takes_value(true)
|
||||
.min_values(1),
|
||||
)
|
||||
.arg(
|
||||
Arg::with_name("thread-pool-size")
|
||||
.long("thread-pool-size")
|
||||
.help("thread pool size (default 64)")
|
||||
.takes_value(true)
|
||||
.min_values(1),
|
||||
)
|
||||
.get_matches();
|
||||
|
||||
// Retrieve arguments
|
||||
@ -252,6 +298,10 @@ fn main() {
|
||||
let sock = cmd_arguments
|
||||
.value_of("sock")
|
||||
.expect("Failed to retrieve vhost-user socket path");
|
||||
let thread_pool_size: usize = match cmd_arguments.value_of("thread-pool-size") {
|
||||
Some(size) => size.parse().expect("Invalid argument for thread-pool-size"),
|
||||
None => THREAD_POOL_SIZE,
|
||||
};
|
||||
|
||||
// Convert into appropriate types
|
||||
let sock = String::from(sock);
|
||||
@ -261,7 +311,9 @@ fn main() {
|
||||
..Default::default()
|
||||
};
|
||||
let fs = PassthroughFs::new(fs_cfg).unwrap();
|
||||
let fs_backend = Arc::new(RwLock::new(VhostUserFsBackend::new(fs).unwrap()));
|
||||
let fs_backend = Arc::new(RwLock::new(
|
||||
VhostUserFsBackend::new(fs, thread_pool_size).unwrap(),
|
||||
));
|
||||
|
||||
let mut daemon = VhostUserDaemon::new(
|
||||
String::from("vhost-user-fs-backend"),
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user