From: Michael Jeanson <mjeanson@efficios.com>
To: libc-alpha@sourceware.org
Cc: Michael Jeanson <mjeanson@efficios.com>,
Florian Weimer <fweimer@redhat.com>,
Carlos O'Donell <carlos@redhat.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Subject: [PATCH v7 0/8] Extend rseq support
Date: Thu, 1 Feb 2024 14:36:40 -0500 [thread overview]
Message-ID: <20240201193648.584917-1-mjeanson@efficios.com> (raw)
This series rebases the standalone "Add rseq extensible ABI" patch on
current master and adds an accelerated getcpu() implementation using the
rseq extensible ABI with initial support for aarch64 and x86_64.
On an aarch64 system (Snapdragon 8cx Gen 3) which lacks a vDSO for
getcpu() we measured an improvement from 130 ns to 1 ns while on x86_64
(i7-8550U) which has a vDSO we measured a more modest improvement from
10 ns to 2 ns.
Tested on i386, aarch64 and x86_64.
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Carlos O'Donell <carlos@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers (2):
x86-64: Add rseq_load32_load32_relaxed
aarch64: Add rseq_load32_load32_relaxed
Michael Jeanson (6):
nptl: fix potential merge of __rseq_* relro symbols
Add rseq extensible ABI support
nptl: Add public __rseq_feature_size symbol
nptl: Add features to internal 'struct rseq_area'
nptl: Add rseq internal utils
Linux: Use rseq to accelerate getcpu
csu/Makefile | 2 +-
csu/libc-tls.c | 66 ++++++-
csu/rseq-sizes.sym | 11 ++
elf/Makefile | 1 +
elf/dl-rseq-symbols.S | 72 ++++++++
elf/dl-tls.c | 62 +++++++
elf/rtld_static_init.c | 12 ++
manual/threads.texi | 8 +
nptl/descr.h | 20 +-
nptl/pthread_create.c | 2 +-
sysdeps/generic/dl-rseq.h | 26 +++
sysdeps/generic/ldsodefs.h | 12 ++
sysdeps/i386/nptl/tcb-access.h | 56 ++++++
sysdeps/nptl/dl-tls_init_tp.c | 16 +-
sysdeps/nptl/tcb-access.h | 5 +
sysdeps/unix/sysv/linux/Makefile | 10 +
sysdeps/unix/sysv/linux/Versions | 3 +
sysdeps/unix/sysv/linux/aarch64/ld.abilist | 1 +
.../unix/sysv/linux/aarch64/rseq-internal.h | 173 ++++++++++++++++++
sysdeps/unix/sysv/linux/alpha/ld.abilist | 1 +
sysdeps/unix/sysv/linux/arc/ld.abilist | 1 +
sysdeps/unix/sysv/linux/arm/be/ld.abilist | 1 +
sysdeps/unix/sysv/linux/arm/le/ld.abilist | 1 +
sysdeps/unix/sysv/linux/csky/ld.abilist | 1 +
sysdeps/unix/sysv/linux/dl-parse_auxv.h | 6 +
sysdeps/unix/sysv/linux/getcpu.c | 32 +++-
sysdeps/unix/sysv/linux/hppa/ld.abilist | 1 +
sysdeps/unix/sysv/linux/i386/ld.abilist | 1 +
.../unix/sysv/linux/loongarch/lp64/ld.abilist | 1 +
.../unix/sysv/linux/m68k/coldfire/ld.abilist | 1 +
.../unix/sysv/linux/m68k/m680x0/ld.abilist | 1 +
sysdeps/unix/sysv/linux/microblaze/ld.abilist | 1 +
.../unix/sysv/linux/mips/mips32/ld.abilist | 1 +
.../sysv/linux/mips/mips64/n32/ld.abilist | 1 +
.../sysv/linux/mips/mips64/n64/ld.abilist | 1 +
sysdeps/unix/sysv/linux/nios2/ld.abilist | 1 +
sysdeps/unix/sysv/linux/or1k/ld.abilist | 1 +
.../sysv/linux/powerpc/powerpc32/ld.abilist | 1 +
.../linux/powerpc/powerpc64/be/ld.abilist | 1 +
.../linux/powerpc/powerpc64/le/ld.abilist | 1 +
sysdeps/unix/sysv/linux/riscv/rv32/ld.abilist | 1 +
sysdeps/unix/sysv/linux/riscv/rv64/ld.abilist | 1 +
sysdeps/unix/sysv/linux/rseq-internal.h | 89 ++++++++-
.../unix/sysv/linux/s390/s390-32/ld.abilist | 1 +
.../unix/sysv/linux/s390/s390-64/ld.abilist | 1 +
sysdeps/unix/sysv/linux/sched_getcpu.c | 3 +-
sysdeps/unix/sysv/linux/sh/be/ld.abilist | 1 +
sysdeps/unix/sysv/linux/sh/le/ld.abilist | 1 +
.../unix/sysv/linux/sparc/sparc32/ld.abilist | 1 +
.../unix/sysv/linux/sparc/sparc64/ld.abilist | 1 +
sysdeps/unix/sysv/linux/sys/rseq.h | 4 +
.../unix/sysv/linux/tst-rseq-disable-static.c | 1 +
sysdeps/unix/sysv/linux/tst-rseq-disable.c | 20 +-
.../unix/sysv/linux/tst-rseq-nptl-static.c | 1 +
sysdeps/unix/sysv/linux/tst-rseq-static.c | 1 +
sysdeps/unix/sysv/linux/tst-rseq.c | 24 ++-
sysdeps/unix/sysv/linux/tst-rseq.h | 9 +-
sysdeps/unix/sysv/linux/x86_64/64/ld.abilist | 1 +
.../unix/sysv/linux/x86_64/rseq-internal.h | 109 +++++++++++
sysdeps/unix/sysv/linux/x86_64/x32/ld.abilist | 1 +
sysdeps/x86_64/nptl/tcb-access.h | 56 ++++++
61 files changed, 886 insertions(+), 56 deletions(-)
create mode 100644 csu/rseq-sizes.sym
create mode 100644 elf/dl-rseq-symbols.S
create mode 100644 sysdeps/generic/dl-rseq.h
create mode 100644 sysdeps/unix/sysv/linux/aarch64/rseq-internal.h
create mode 100644 sysdeps/unix/sysv/linux/tst-rseq-disable-static.c
create mode 100644 sysdeps/unix/sysv/linux/tst-rseq-nptl-static.c
create mode 100644 sysdeps/unix/sysv/linux/tst-rseq-static.c
create mode 100644 sysdeps/unix/sysv/linux/x86_64/rseq-internal.h
--
2.34.1
next reply other threads:[~2024-02-01 19:37 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-01 19:36 Michael Jeanson [this message]
2024-02-01 19:36 ` [PATCH v7 1/8] nptl: fix potential merge of __rseq_* relro symbols Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 2/8] Add rseq extensible ABI support Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 3/8] nptl: Add public __rseq_feature_size symbol Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 4/8] nptl: Add features to internal 'struct rseq_area' Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 5/8] nptl: Add rseq internal utils Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 6/8] x86-64: Add rseq_load32_load32_relaxed Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 7/8] aarch64: " Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 8/8] Linux: Use rseq to accelerate getcpu Michael Jeanson
2024-02-02 15:40 ` [PATCH v7 0/8] Extend rseq support Michael Jeanson
2024-02-02 16:18 ` Adhemerval Zanella Netto
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