Use "Delta" to refer to the difference between measurements, rather than
"Error", so scripts that look for "Error" aren't confused into thinking
there was a failure.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Test that an ISA 3.0 compliant machine performing an unaligned copy,
copy_first, paste or paste_last is sent a SIGBUS.
Signed-off-by: Chris Smart <chris@distroguy.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
These are useful little loops for smoke testing performance.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Currently it doesn't appear the resulting binary actually uses any
Altivec or VSX instructions the solution is to explicitly tell GCC to
use vector instructions and use vector types in the code.
Part of this this issue can be GCC version specific:
GCC 4.9.x is happy to use Altivec and VSX instructions if altivec.h is
includedi (and possibly if vector types are used), this also means that
4.9.x will use VSX instructions even if only -maltivec is passed. It is
also possible that Altivec instructions will be used even without
-maltivec or -mabi=altivec.
GCC 5.2.x complains about the lack of -maltivec parameter if altivec.h
is included and will not use VSX unless -mvsx is present on commandline.
GCC 5.3.0 has a regression that means __attribute__((__target__("no-vsx"))
fails to build. A fix is targeted for 5.4.
Furthermore LTO (Link Time Optimisation) doesn't play well with
__attribute__((__target__("no-vsx")), LTO can cause GCC to forget about
the attribute and compile with VSX instructions regardless. Be wary when
enabling -flfo for this test.
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
When we inverted the behaviour of the flags we forgot to update the
usage message.
Fixes: 51c21e72eb ("selftests/powerpc: Make context_switch touch FP/altivec/vector by default")
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Excerpt from man 2 perf_event_open:
/proc/sys/kernel/perf_event_paranoid
The perf_event_paranoid file can be set to restrict access to the
performance counters.
2 allow only user-space measurements.
1 allow both kernel and user measurements (default).
0 allow access to CPU-specific data but not raw tracepoint samples.
-1 no restrictions.
require_paranoia_below() should return 0 if perf_event_paranoid is below
a specified level, the value from perf_event_paranoid is read into an
unsigned long so the incorrect value is returned when
perf_event_paranoid is set to -1.
Without this patch applied there is the same number of selftests/powerpc
which skip when /proc/sys/kernel/perf_event_paranoid is set to 1 or -1
but no skips when set to zero.
With this patch applied there are no skipped selftests/powerpc test when
/proc/sys/kernel/perf_event_paranoid is set to 0 or -1.
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Adds two tests. One is a simple test to ensure that the new registers
LMRR and LMSER are properly maintained. The other actually uses the
existing EBB test infrastructure to test that LMRR and LMSER behave as
documented.
Signed-off-by: Jack Miller <jack@codezen.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Pull perf fixes from Ingo Molnar:
"A handful of tooling fixes, two PMU driver fixes and a cleanup of
redundant code that addresses a security analyzer false positive"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Remove a redundant check
perf/x86/intel/uncore: Remove SBOX support for Broadwell server
perf ctf: Convert invalid chars in a string before set value
perf record: Fix crash when kptr is restricted
perf symbols: Check kptr_restrict for root
perf/x86/intel/rapl: Fix pmus free during cleanup
This fixes the following compiler warnings when compiling the
reuseport_bpf testcase on a 32 bit platform:
reuseport_bpf.c: In function ‘attach_ebpf’:
reuseport_bpf.c:114:15: warning: cast from pointer to integer of ifferent size [-Wpointer-to-int-cast]
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull second batch of KVM updates from Radim Krčmář:
"General:
- move kvm_stat tool from QEMU repo into tools/kvm/kvm_stat (kvm_stat
had nothing to do with QEMU in the first place -- the tool only
interprets debugfs)
- expose per-vm statistics in debugfs and support them in kvm_stat
(KVM always collected per-vm statistics, but they were summarised
into global statistics)
x86:
- fix dynamic APICv (VMX was improperly configured and a guest could
access host's APIC MSRs, CVE-2016-4440)
- minor fixes
ARM changes from Christoffer Dall:
- new vgic reimplementation of our horribly broken legacy vgic
implementation. The two implementations will live side-by-side
(with the new being the configured default) for one kernel release
and then we'll remove the legacy one.
- fix for a non-critical issue with virtual abort injection to guests"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (70 commits)
tools: kvm_stat: Add comments
tools: kvm_stat: Introduce pid monitoring
KVM: Create debugfs dir and stat files for each VM
MAINTAINERS: Add kvm tools
tools: kvm_stat: Powerpc related fixes
tools: Add kvm_stat man page
tools: Add kvm_stat vm monitor script
kvm:vmx: more complete state update on APICv on/off
KVM: SVM: Add more SVM_EXIT_REASONS
KVM: Unify traced vector format
svm: bitwise vs logical op typo
KVM: arm/arm64: vgic-new: Synchronize changes to active state
KVM: arm/arm64: vgic-new: enable build
KVM: arm/arm64: vgic-new: implement mapped IRQ handling
KVM: arm/arm64: vgic-new: Wire up irqfd injection
KVM: arm/arm64: vgic-new: Add vgic_v2/v3_enable
KVM: arm/arm64: vgic-new: vgic_init: implement map_resources
KVM: arm/arm64: vgic-new: vgic_init: implement vgic_init
KVM: arm/arm64: vgic-new: vgic_init: implement vgic_create
KVM: arm/arm64: vgic-new: vgic_init: implement kvm_vgic_hyp_init
...
Before this patch, a simple 'perf record' could fail if kptr_restrict is
set to 1 (for normal user) or 2 (for root):
# perf record ls
WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,
check /proc/sys/kernel/kptr_restrict.
Samples in kernel functions may not be resolved if a suitable vmlinux
file is not found in the buildid cache or in the vmlinux path.
Samples in kernel modules won't be resolved at all.
If some relocation was applied (e.g. kexec) symbols may be misresolved
even with a suitable vmlinux or kallsyms file.
Segmentation fault (core dumped)
This patch skips perf_event__synthesize_kernel_mmap() when kptr is not
available.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Fixes: 45e9005690 ("perf machine: Do not bail out if not managing to read ref reloc symbol")
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1464081688-167940-2-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Pull kbuild updates from Michal Marek:
- new option CONFIG_TRIM_UNUSED_KSYMS which does a two-pass build and
unexports symbols which are not used in the current config [Nicolas
Pitre]
- several kbuild rule cleanups [Masahiro Yamada]
- warning option adjustments for gcov etc [Arnd Bergmann]
- a few more small fixes
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (31 commits)
kbuild: move -Wunused-const-variable to W=1 warning level
kbuild: fix if_change and friends to consider argument order
kbuild: fix adjust_autoksyms.sh for modules that need only one symbol
kbuild: fix ksym_dep_filter when multiple EXPORT_SYMBOL() on the same line
gcov: disable -Wmaybe-uninitialized warning
gcov: disable tree-loop-im to reduce stack usage
gcov: disable for COMPILE_TEST
Kbuild: disable 'maybe-uninitialized' warning for CONFIG_PROFILE_ALL_BRANCHES
Kbuild: change CC_OPTIMIZE_FOR_SIZE definition
kbuild: forbid kernel directory to contain spaces and colons
kbuild: adjust ksym_dep_filter for some cmd_* renames
kbuild: Fix dependencies for final vmlinux link
kbuild: better abstract vmlinux sequential prerequisites
kbuild: fix call to adjust_autoksyms.sh when output directory specified
kbuild: Get rid of KBUILD_STR
kbuild: rename cmd_as_s_S to cmd_cpp_s_S
kbuild: rename cmd_cc_i_c to cmd_cpp_i_c
kbuild: drop redundant "PHONY += FORCE"
kbuild: delete unnecessary "@:"
kbuild: mark help target as PHONY
...
Pull perf updates from Ingo Molnar:
"Mostly tooling and PMU driver fixes, but also a number of late updates
such as the reworking of the call-chain size limiting logic to make
call-graph recording more robust, plus tooling side changes for the
new 'backwards ring-buffer' extension to the perf ring-buffer"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
perf record: Read from backward ring buffer
perf record: Rename variable to make code clear
perf record: Prevent reading invalid data in record__mmap_read
perf evlist: Add API to pause/resume
perf trace: Use the ptr->name beautifier as default for "filename" args
perf trace: Use the fd->name beautifier as default for "fd" args
perf report: Add srcline_from/to branch sort keys
perf evsel: Record fd into perf_mmap
perf evsel: Add overwrite attribute and check write_backward
perf tools: Set buildid dir under symfs when --symfs is provided
perf trace: Only auto set call-graph to "dwarf" when syscalls are being traced
perf annotate: Sort list of recognised instructions
perf annotate: Fix identification of ARM blt and bls instructions
perf tools: Fix usage of max_stack sysctl
perf callchain: Stop validating callchains by the max_stack sysctl
perf trace: Fix exit_group() formatting
perf top: Use machine->kptr_restrict_warned
perf trace: Warn when trying to resolve kernel addresses with kptr_restrict=1
perf machine: Do not bail out if not managing to read ref reloc symbol
perf/x86/intel/p4: Trival indentation fix, remove space
...
Pull objtool build fix from Ingo Molnar:
"An libtool fix for older libelf versions"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Allow building with older libelf
Pull parisc updates from Helge Deller:
- Add native high-resolution timing code for sched_clock() and other
timing functions based on the processor internal cr16 cycle counters
- Add syscall tracepoint support
- Add regset support
- Speed up get_user() and put_user() functions
- Updated futex.h to match generic implementation (John David Anglin)
- A few smaller ftrace build fixes
- Fixed thuge-gen kernel self test to utilize architectured MAP_HUGETLB
value
- Added parisc architecture to seccomp_bpf kernel self test
- Various typo fixes (Andrea Gelmini)
* 'parisc-4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Whitespace cleanups in unistd.h
parisc: Use long jump to reach ftrace_return_to_handler()
parisc: Fix typo in fpudispatch.c
parisc: Fix typos in eisa_eeprom.h
parisc: Fix typo in ldcw.h
parisc: Fix typo in pdc.h
parisc: Update futex.h to match generic implementation
parisc: Merge ftrace C-helper and assembler functions into .text.hot section
selftests/thuge-gen: Use platform specific MAP_HUGETLB value
parisc: Add native high-resolution sched_clock() implementation
parisc: Add ARCH_TRACEHOOK and regset support
parisc: Add 64bit get_user() and put_user() for 32bit kernel
parisc: Simplify and speed up get_user() and put_user()
parisc: Add syscall tracepoint support
A lot of the code works with the perf events about which only sparse
documentation was available until 2012. Having that information now,
we can clarify what is done in the code.
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Having stats for single VMs can help to determine the problem of a VM
without the need of running other tools like perf.
The tracepoints already allowed pid level monitoring, but kvm_stat
didn't have support for it till now. Support for the newly implemented
debugfs vm monitoring was also implemented.
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
kvm_stat script is failing to execute on powerpc :
# ./kvm_stat
Traceback (most recent call last):
File "./kvm_stat", line 825, in <module>
main()
File "./kvm_stat", line 813, in main
providers = get_providers(options)
File "./kvm_stat", line 778, in get_providers
providers.append(TracepointProvider())
File "./kvm_stat", line 416, in __init__
self.filters = get_filters()
File "./kvm_stat", line 315, in get_filters
if ARCH.exit_reasons:
AttributeError: 'ArchPPC' object has no attribute 'exit_reasons'
This is because, its trying to access a non-defined attribute.
Also, the IOCTL number of RESET is incorrect for powerpc. The correct
number has been added.
Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Converted from the Texinfo source in QEMU to asciidoc. The a2x
incantation was provided by Janosch Frank.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This tool displays kvm vm exit statistics to ease vm monitoring. It
takes its data from the kvm debugfs files or the vm tracepoints and
outputs them as a curses ui or simple text.
It was moved from qemu, as it is dependent on the kernel whereas qemu
works with a large number of kernel versions, some of which may break
the script.
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Pull virtio updates from Michael Tsirkin:
"Looks like a quiet cycle for virtio. There's a new inorder option for
the ringtest tool, and a bugfix for balloon for ppc platforms when
using virtio 1 mode"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
ringtest: pass buf != NULL
virtio_balloon: fix PFN format for virtio-1
virtio: add inorder option
Pull kselftest updates from Shuah Khan:
"This update for Kselftest adds:
- a new ftrace testcase
- fixes for ftrace and intel_pstate tests"
* tag 'linux-kselftest-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
tools: testing: define the _GNU_SOURCE macro
kselftests/ftrace: Add a test case for event pid filtering
kselftests/ftrace: Detect tracefs mount point
Pull tracing fix from Steven Rostedt:
"Reviewing the selftest I recently submitted, I realize that the second
part of it uses my old hack to get the PID of the spawned background
tasks, which doesn't work for all shells, instead of the common use of
$!"
* tag 'trace-v4.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftracetest: Use proper logic to find process PID
