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| author | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | 2023-07-07 05:02:37 +0000 |
|---|---|---|
| committer | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | 2023-07-07 05:02:37 +0000 |
| commit | 71927bc101a1c2e7360022c2a056f49106b722ea (patch) | |
| tree | ebe9c872e416346e4b333e5062da32401c8e0a73 /man/io_uring_register_iowq_aff.3 | |
| parent | d53db6851ea17b2d219d084e1afc683b8b62b105 (diff) | |
| parent | 1d27ff1934c5c4292dc00fba7f7f8ae411ed42f5 (diff) | |
| download | liburing-android14-mainline-os-statsd-release.tar.gz | |
Snap for 10453563 from 1d27ff1934c5c4292dc00fba7f7f8ae411ed42f5 to mainline-os-statsd-releaseaml_sta_341710000aml_sta_341615000aml_sta_341511040aml_sta_341410000aml_sta_341311010aml_sta_341114000aml_sta_341111000aml_sta_341010020aml_sta_340912000aml_sta_340911000aml_net_341111030android14-mainline-os-statsd-release
Change-Id: I92aad81dca3afa0dc7b00b53365472f7f29e4b40
Diffstat (limited to 'man/io_uring_register_iowq_aff.3')
| -rw-r--r-- | man/io_uring_register_iowq_aff.3 | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/man/io_uring_register_iowq_aff.3 b/man/io_uring_register_iowq_aff.3 new file mode 100644 index 0000000..e782914 --- /dev/null +++ b/man/io_uring_register_iowq_aff.3 @@ -0,0 +1,61 @@ +.\" Copyright (C) 2022 Jens Axboe <axboe@kernel.dk> +.\" +.\" SPDX-License-Identifier: LGPL-2.0-or-later +.\" +.TH io_uring_register_iowq_aff 3 "March 13, 2022" "liburing-2.2" "liburing Manual" +.SH NAME +io_uring_register_iowq_aff \- register async worker CPU affinities +.SH SYNOPSIS +.nf +.B #include <sched.h> +.B #include <liburing.h> +.PP +.BI "int io_uring_register_iowq_aff(struct io_uring *" ring "," +.BI " size_t " cpusz "," +.BI " const cpu_set_t *" mask "); +.PP +.BI "void io_uring_unregister_iowq_aff(struct io_uring *" ring ");" +.fi +.SH DESCRIPTION +.PP +The +.BR io_uring_prep_register_iowq_aff (3) +function registers a set of CPU affinities to be used by the io_uring async +workers. By default, io_uring async workers are allowed to run on any CPU in +the system. If this function is called with +.I ring +set to the ring in question and +.I mask +set to a pointer to a +.B cpu_set_t +value and +.I cpusz +set to the size of the CPU set, then async workers will only be allowed to run +on the CPUs specified in the mask. Existing workers may need to hit a schedule +point before they are migrated. + +For unregistration, +.BR io_uring_unregister_iowq_aff (3) +may be called to restore CPU affinities to the default. + +.SH RETURN VALUE +Returns +.B 0 +on success, or any of the following values in case of error. +.TP +.B -EFAULT +The kernel was unable to copy the memory pointer to by +.I mask +as it was invalid. +.TP +.B -ENOMEM +The kernel was unable to allocate memory for the new CPU mask. +.TP +.B -EINVAL +.I cpusz +or +.I mask +was NULL/0, or any other value specified was invalid. +.SH SEE ALSO +.BR io_uring_queue_init (3), +.BR io_uring_register (2) |