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Message-ID: <20160908113755.GA20845@yury-N73SV>
Date:   Thu, 8 Sep 2016 14:37:55 +0300
From:   Yury Norov <ynorov@...iumnetworks.com>
To:     "Zhangjian (Bamvor)" <bamvor.zhangjian@...wei.com>
CC:     <libc-alpha@...rceware.org>, <linux-kernel@...r.kernel.org>,
        <arnd@...db.de>, <catalin.marinas@....com>,
        <marcus.shawcroft@....com>, <philb@....org>, <davem@...emloft.net>,
        <szabolcs.nagy@....com>, <maxim.kuvyrkov@...aro.org>,
        <joseph@...esourcery.com>, <pinskia@...il.com>, <schwab@...e.de>,
        <fweimer@...hat.com>, <Prasun.Kapoor@...ium.com>,
        <cmetcalf@...lanox.com>, <hjl.tools@...il.com>,
        <adhemerval.zanella@...aro.org>,
        Bamvor Zhang Jian <bamvor.zhangjian@...aro.org>,
        "jijun (D)" <jijun2@...wei.com>, Hanjun Guo <guohanjun@...wei.com>
Subject: Re: [RFC2 PATCH 00/23] ARM64: support ILP32

On Thu, Sep 08, 2016 at 12:25:27PM +0800, Zhangjian (Bamvor) wrote:
> Hi, Guys
> 
> There was a discussion about bump vdso version of kernel. We need
> update the vdso version in glibc correspondingly otherwise the
> application could not make use of the vdso.
> 
> Is it make sense to you?
> 
> Regards
> 
> Bamvor

Hi Bamvor,

Is this the source of performance loss you've discovered?

> 
> commit 3ffc1d798fc25ccb02e7cc325fe5fb3890c085e3
> Author: Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>
> Date:   Thu Sep 8 12:21:16 2016 +0800
> 
>     [AARCH64] ILP32: bump vdso version consistent with kernel
> 
>     Signed-off-by: Jun Ji <jijun2@...wei.com>
>     Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>
> 
> diff --git a/sysdeps/unix/sysv/linux/aarch64/init-first.c b/sysdeps/unix/sysv/linux/aarch64/init-first.c
> index f7224a2..3e4eaad 100644
> --- a/sysdeps/unix/sysv/linux/aarch64/init-first.c
> +++ b/sysdeps/unix/sysv/linux/aarch64/init-first.c
> @@ -27,17 +27,21 @@ int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *);
>  static inline void
>  _libc_vdso_platform_setup (void)
>  {
> -  PREPARE_VERSION (linux2639, "LINUX_2.6.39", 123718537);
> +#ifndef __ILP32__
> +  PREPARE_VERSION (linux, "LINUX_2.6.39", 123718537);
> +#else
> +  PREPARE_VERSION (linux, "LINUX_4.8", 61765624);
> +#endif /* #ifndef __ILP32__ */
> 
> -  void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2639);
> +  void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux);
>    PTR_MANGLE (p);
>    VDSO_SYMBOL(gettimeofday) = p;
> 
> -  p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2639);
> +  p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux);
>    PTR_MANGLE (p);
>    VDSO_SYMBOL(clock_gettime) = p;
> 
> -  p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2639);
> +  p = _dl_vdso_vsym ("__kernel_clock_getres", &linux);
>    PTR_MANGLE (p);
>    VDSO_SYMBOL(clock_getres) = p;
>  }
> 
> 
> On 2016/6/29 0:39, Yury Norov wrote:
> >This series enables aarch64 port with ilp32 mode.
> >
> >ABI details:
> > - types are taken from AARCH32, next types turned to 64-bit,
> >   as modern requirement for new APIs tells:
> >	ino_t      is  u64 type
> >	off_t      is  s64 type
> >	blkcnt_t   is  s64 type
> >	fsblkcnt_t is  u64 type
> >	fsfilcnt_t is  u64 type
> > - 64-bit arguments are passed in syscall as register pair,
> >   as kernel internally clears top halves for all input regs;
> > - standard syscall table is used;
> > - 32-bit time_t is used. AARCH64/ILP32 is waiting for general
> >   fix of Y2038 problem just like other 32-bit arches;
> > - stat{64}, statfs{64} structures are of the identical layout
> >   with LP64. Corresponding syscalls are taken from 64-bit code
> > - struct utmp, utmpx layouts are the same.
> >
> >v1: https://sourceware.org/ml/libc-alpha/2016-06/msg00730.html
> >v2:
> > - rebased on master;
> > - dropped unneeded/unrelated patches;
> > - pread family platform implementation removed;
> > - addressed v1 comments (I'm really sorry if I missed something,
> >   there are a lot of them, and I am really thankfull for detailed review);
> >
> >Tested with LTP. Regressions are like this:
> >abort01                        FAIL       2
> >kill11                         FAIL       2
> >mmap16                         FAIL       6
> >open12                         FAIL       2
> >rename11                       FAIL       2
> >rmdir02                        FAIL       2
> >umount2_01                     FAIL       2
> >umount2_02                     FAIL       2
> >umount2_03                     FAIL       2
> >utime06                        FAIL       2
> >
> >It's better than v1, and there are ~5 additional regressions comparing to
> >aarch64, all are related to filesystem.
> >
> >Andrew Pinski (17):
> >  [AARCH64] define word size for lp64 and ilp32
> >  [AARCH64] Add header guards to sysdep.h headers.
> >  Add dynamic ILP32 AARCH64 relocations to elf.h
> >  [AARCH64] Add PTR_REG, PTR_LOG_SIZE, and PTR_SIZE.  Use it in
> >    LDST_PCREL and LDST_GLOBAL.
> >  [AARCH64] Use PTR_REG in crti.S.
> >  [AARCH64] Use PTR_REG/PTR_SIZE/PTR_SIZE_LOG in dl-tlsesc.S
> >  [AARCH64] Use PTR_* macros in dl-trampoline.S
> >  [AARCH64] Use PTR_* in start.S
> >  [AARCH64] Use PTR_REG in getcontext.S.
> >  [AARCH64] Detect ILP32 in configure scripts.
> >  [AARCH64] Add ILP32 support to elf_machine_load_address.
> >  [AARCH64] Add ILP32 to makefiles
> >  [AARCH64] Add support to ldconfig for ILP32 and libilp32
> >  [AARCH64] Add ILP32 ld.so to the known interpreter names.
> >  [AARCH64] Add ldd-rewrite.sed so that ilp32 ld.so can be found
> >  [AARCH64] Make lp64 and ilp32 directories.
> >  [AARCH64] Fix ILP32 warning
> >
> >Yury Norov (6):
> >  [AARCH64] ILP32: introduce syscalls that pass off_t
> >  [AARCH64] ILP32: support stat syscall family
> >  [AARCH64] delouse input arguments in system functions
> >  [AARCH64] Make __SIZEOF_SEM_T 16 for ILP32
> >  off_t: fix register pair calculation for 64-bit case
> >  [AARCH64] Take utmp{,x}.h from s390 port
> >
> > elf/cache.c                                        |   3 +
> > sysdeps/aarch64/Implies                            |   6 -
> > sysdeps/aarch64/__longjmp.S                        |   6 +-
> > sysdeps/aarch64/bits/wordsize.h                    |  25 +++
> > sysdeps/aarch64/configure                          |  15 +-
> > sysdeps/aarch64/configure.ac                       |  11 +-
> > sysdeps/aarch64/crti.S                             |   3 +-
> > sysdeps/aarch64/dl-irel.h                          |   3 +-
> > sysdeps/aarch64/dl-machine.h                       | 199 ++++++++++++---------
> > sysdeps/aarch64/dl-tlsdesc.S                       |  56 +++---
> > sysdeps/aarch64/dl-trampoline.S                    |  18 +-
> > sysdeps/aarch64/ilp32/Implies                      |   6 +
> > sysdeps/aarch64/jmpbuf-unwind.h                    |   2 +-
> > sysdeps/aarch64/lp64/Implies                       |   7 +
> > sysdeps/aarch64/memcmp.S                           |   3 +
> > sysdeps/aarch64/memcpy.S                           |   8 +
> > sysdeps/aarch64/memset.S                           |   3 +
> > sysdeps/aarch64/nptl/bits/semaphore.h              |   4 +
> > sysdeps/aarch64/preconfigure                       |  11 +-
> > sysdeps/aarch64/setjmp.S                           |   5 +-
> > sysdeps/aarch64/start.S                            |  20 ++-
> > sysdeps/aarch64/strchr.S                           |   1 +
> > sysdeps/aarch64/strchrnul.S                        |   1 +
> > sysdeps/aarch64/strcmp.S                           |   2 +
> > sysdeps/aarch64/strcpy.S                           |   2 +
> > sysdeps/aarch64/strlen.S                           |   2 +
> > sysdeps/aarch64/strncmp.S                          |   3 +
> > sysdeps/aarch64/strnlen.S                          |   3 +
> > sysdeps/aarch64/strrchr.S                          |   1 +
> > sysdeps/aarch64/sysdep.h                           |  39 +++-
> > sysdeps/generic/ldconfig.h                         |   1 +
> > sysdeps/generic/stdint.h                           |   9 +-
> > sysdeps/unix/sysv/linux/aarch64/Implies            |   2 -
> > sysdeps/unix/sysv/linux/aarch64/Makefile           |  16 +-
> > sysdeps/unix/sysv/linux/aarch64/bits/fcntl.h       |   6 +-
> > sysdeps/unix/sysv/linux/aarch64/bits/stat.h        | 195 ++++++++++++++++++++
> > sysdeps/unix/sysv/linux/aarch64/bits/statfs.h      |  64 +++++++
> > sysdeps/unix/sysv/linux/aarch64/bits/typesizes.h   |  86 +++++++++
> > sysdeps/unix/sysv/linux/aarch64/bits/utmp.h        |   1 +
> > sysdeps/unix/sysv/linux/aarch64/bits/utmpx.h       |   1 +
> > sysdeps/unix/sysv/linux/aarch64/clone.S            |   7 +
> > sysdeps/unix/sysv/linux/aarch64/configure          |  24 ++-
> > sysdeps/unix/sysv/linux/aarch64/configure.ac       |  11 +-
> > sysdeps/unix/sysv/linux/aarch64/dl-cache.h         |  13 +-
> > sysdeps/unix/sysv/linux/aarch64/getcontext.S       |   3 +-
> > sysdeps/unix/sysv/linux/aarch64/ilp32/Implies      |   4 +
> > .../unix/sysv/linux/aarch64/ilp32/dl-fxstatat64.c  |   7 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/dl-xstat64.c |   6 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/fstatfs.c    |  29 +++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/fstatfs64.c  |  29 +++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/ftruncate.c  |   1 +
> > .../unix/sysv/linux/aarch64/ilp32/ftruncate64.c    |   4 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/fxstat.c     |  51 ++++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/fxstat64.c   |  44 +++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/fxstatat.c   |  48 +++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/fxstatat64.c |  52 ++++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/getdents.c   |  77 ++++++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/getdents64.c |   1 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/lseek.c      |  36 ++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/lxstat.c     |  47 +++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/lxstat64.c   |  47 +++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/mmap.c       |   1 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/mmap64.c     |   1 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/msgctl.c     |  32 ++++
> > .../unix/sysv/linux/aarch64/ilp32/posix_fadvise.c  |   1 +
> > .../sysv/linux/aarch64/ilp32/posix_fadvise64.c     |   2 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/readahead.c  |   1 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/readdir64.c  |   1 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/semctl.c     |  53 ++++++
> > .../unix/sysv/linux/aarch64/ilp32/shlib-versions   |   7 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/shmctl.c     |  32 ++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/statfs.c     |  30 ++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/statfs64.c   |  29 +++
> > .../unix/sysv/linux/aarch64/ilp32/syscalls.list    |   0
> > sysdeps/unix/sysv/linux/aarch64/ilp32/truncate.c   |   1 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/truncate64.c |   4 +
> > sysdeps/unix/sysv/linux/aarch64/ilp32/xstat.c      |  47 +++++
> > sysdeps/unix/sysv/linux/aarch64/ilp32/xstat64.c    |  47 +++++
> > sysdeps/unix/sysv/linux/aarch64/ioctl.S            |  31 ----
> > sysdeps/unix/sysv/linux/aarch64/kernel-features.h  |  27 +++
> > sysdeps/unix/sysv/linux/aarch64/ldconfig.h         |   2 +
> > sysdeps/unix/sysv/linux/aarch64/ldd-rewrite.sed    |   1 +
> > sysdeps/unix/sysv/linux/aarch64/lp64/Implies       |   4 +
> > sysdeps/unix/sysv/linux/aarch64/lp64/ioctl.S       |  31 ++++
> > sysdeps/unix/sysv/linux/aarch64/lp64/mmap.c        |  34 ++++
> > .../unix/sysv/linux/aarch64/lp64/shlib-versions    |   7 +
> > sysdeps/unix/sysv/linux/aarch64/mmap.c             |  34 ----
> > sysdeps/unix/sysv/linux/aarch64/setcontext.S       |   1 +
> > sysdeps/unix/sysv/linux/aarch64/shlib-versions     |   7 -
> > sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h   |   2 +-
> > sysdeps/unix/sysv/linux/aarch64/swapcontext.S      |   1 +
> > sysdeps/unix/sysv/linux/aarch64/sysdep.h           |   8 +-
> > sysdeps/unix/sysv/linux/arm/readelflib.c           |   4 +-
> > sysdeps/unix/sysv/linux/fallocate.c                |   4 +
> > sysdeps/unix/sysv/linux/fallocate64.c              |   4 +
> > sysdeps/unix/sysv/linux/generic/brk.c              |   2 +-
> > sysdeps/unix/sysv/linux/posix_fadvise.c            |   4 +
> > sysdeps/unix/sysv/linux/posix_fadvise64.c          |   4 +
> > sysdeps/unix/sysv/linux/posix_fallocate.c          |   4 +
> > sysdeps/unix/sysv/linux/posix_fallocate64.c        |   4 +
> > 100 files changed, 1649 insertions(+), 250 deletions(-)
> > delete mode 100644 sysdeps/aarch64/Implies
> > create mode 100644 sysdeps/aarch64/bits/wordsize.h
> > mode change 100644 => 100755 sysdeps/aarch64/configure
> > create mode 100644 sysdeps/aarch64/ilp32/Implies
> > create mode 100644 sysdeps/aarch64/lp64/Implies
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/stat.h
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/statfs.h
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/typesizes.h
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/utmp.h
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/bits/utmpx.h
> > mode change 100644 => 100755 sysdeps/unix/sysv/linux/aarch64/configure
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/Implies
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/dl-fxstatat64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/dl-xstat64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/fstatfs.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/fstatfs64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/ftruncate.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/ftruncate64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/fxstat.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/fxstat64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/fxstatat.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/fxstatat64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/getdents.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/getdents64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/lseek.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/lxstat.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/lxstat64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/mmap.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/mmap64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/msgctl.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/posix_fadvise.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/posix_fadvise64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/readahead.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/readdir64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/semctl.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/shlib-versions
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/shmctl.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/statfs.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/statfs64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/syscalls.list
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/truncate.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/truncate64.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/xstat.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ilp32/xstat64.c
> > delete mode 100644 sysdeps/unix/sysv/linux/aarch64/ioctl.S
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/kernel-features.h
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/ldd-rewrite.sed
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/lp64/Implies
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/lp64/ioctl.S
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/lp64/mmap.c
> > create mode 100644 sysdeps/unix/sysv/linux/aarch64/lp64/shlib-versions
> > delete mode 100644 sysdeps/unix/sysv/linux/aarch64/mmap.c
> > delete mode 100644 sysdeps/unix/sysv/linux/aarch64/shlib-versions
> >

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