Displaying 20 results from an estimated 147 matches for "kallsym".
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kallsyms
2020 Aug 18
0
qemu -display sdl,gl=on also eats CPU
...--------
16662 2.2940 (no location information) libc-2.30.so memcpy
16662 100.000 (no location information) libc-2.30.so memcpy [self]
-------------------------------------------------------------------------------
8587 1.1823 (no location information) kallsyms dma_direct_alloc_pages
8587 100.000 (no location information) kallsyms dma_direct_alloc_pages [self]
-------------------------------------------------------------------------------
2276 0.3134 (no location information) kallsyms iorea...
2017 Dec 01
3
gnu X sysv hash performance
...8% ld-2.24.so [.] strcmp
2.66% ld-2.24.so [.] _dl_relocate_object
2.58% ld-2.24.so [.] _dl_lookup_symbol_x
1.85% ld-2.24.so [.] _dl_name_match_p
1.46% [kernel.kallsyms] [k] copy_page
1.38% ld-2.24.so [.] _dl_map_object
1.30% [kernel.kallsyms] [k] unmap_page_range
1.28% [kernel.kallsyms] [k]
filemap_map_pages
1.26% libLLVMSupport.so.6.0.0svn...
2013 Nov 20
4
[PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist
Hi -
> > Does this new blacklist cover enough that the kernel now survives a
> > broadly wildcarded perf-probe, e.g. over e.g. all of its kallsyms?
>
> That's generally the purpose of the annotations - if it doesn't then
> that's a bug.
AFAIK, no kernel since kprobes was introduced has ever stood up to
that test. perf probe lacks the wildcarding powers of systemtap, so
one needs to resort to something like:
# cat /p...
2013 Nov 20
4
[PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist
Hi -
> > Does this new blacklist cover enough that the kernel now survives a
> > broadly wildcarded perf-probe, e.g. over e.g. all of its kallsyms?
>
> That's generally the purpose of the annotations - if it doesn't then
> that's a bug.
AFAIK, no kernel since kprobes was introduced has ever stood up to
that test. perf probe lacks the wildcarding powers of systemtap, so
one needs to resort to something like:
# cat /p...
2020 Aug 17
0
qemu -display sdl,gl=on also eats CPU
....38.0 [self]
-------------------------------------------------------------------------------
28094 5.6885 libc-2.30.so memcpy
28094 100.000 libc-2.30.so memcpy [self]
-------------------------------------------------------------------------------
13758 2.7857 kallsyms dma_direct_alloc_pages
13758 100.000 kallsyms dma_direct_alloc_pages [self]
-------------------------------------------------------------------------------
2508 0.5078 qemu-system-x86_64 /usr/bin/qemu-system-x86_64
2508 100.000 qemu-system-x...
2013 Apr 07
2
qemu-kvm high cpu usage with idle windows guest
Windows 2k8 R2 guest with updated virtio drivers is idle inside but on
the host qemu-kvm process uses 7-15% cpu.
Things that have been tried without any significant success
- removed tablet device
- manually set cpu topology for cores per socket
Is it just me or the qemu-kvm has little tolerance with windows?
2013 Apr 07
2
qemu-kvm high cpu usage with idle windows guest
Windows 2k8 R2 guest with updated virtio drivers is idle inside but on
the host qemu-kvm process uses 7-15% cpu.
Things that have been tried without any significant success
- removed tablet device
- manually set cpu topology for cores per socket
Is it just me or the qemu-kvm has little tolerance with windows?
2014 Apr 02
0
[PATCH v8 01/10] qspinlock: A generic 4-byte queue spinlock implementation
...e| 229913 | 245866 | +6.94% |
|short | 8496794 | 8281918 | -2.53% |
+------------+----------+-----------------+---------+
The workload with the most gain was the disk workload. Without the
patch, the perf profile at 1500 users looked like:
26.19% reaim [kernel.kallsyms] [k] _raw_spin_lock
|--47.28%-- evict
|--46.87%-- inode_sb_list_add
|--1.24%-- xlog_cil_insert_items
|--0.68%-- __remove_inode_hash
|--0.67%-- inode_wait_for_writeback
--3.26%-- [...]
22.96% swapper [kernel.ka...
2014 Feb 26
0
[PATCH v5 1/8] qspinlock: Introducing a 4-byte queue spinlock implementation
...e| 229913 | 245866 | +6.94% |
|short | 8496794 | 8281918 | -2.53% |
+------------+----------+-----------------+---------+
The workload with the most gain was the disk workload. Without the
patch, the perf profile at 1500 users looked like:
26.19% reaim [kernel.kallsyms] [k] _raw_spin_lock
|--47.28%-- evict
|--46.87%-- inode_sb_list_add
|--1.24%-- xlog_cil_insert_items
|--0.68%-- __remove_inode_hash
|--0.67%-- inode_wait_for_writeback
--3.26%-- [...]
22.96% swapper [kernel.ka...
2014 Feb 27
0
[PATCH v5 1/8] qspinlock: Introducing a 4-byte queue spinlock implementation
...e| 229913 | 245866 | +6.94% |
|short | 8496794 | 8281918 | -2.53% |
+------------+----------+-----------------+---------+
The workload with the most gain was the disk workload. Without the
patch, the perf profile at 1500 users looked like:
26.19% reaim [kernel.kallsyms] [k] _raw_spin_lock
|--47.28%-- evict
|--46.87%-- inode_sb_list_add
|--1.24%-- xlog_cil_insert_items
|--0.68%-- __remove_inode_hash
|--0.67%-- inode_wait_for_writeback
--3.26%-- [...]
22.96% swapper [kernel.ka...
2013 Nov 14
2
Re: Problem about lxc-enter-namespace interface
...aces for 1545: Function not implemented
>>
>> hzguanqiang@debian:~$ <mailto:hzguanqiang@debian:~$> ls /proc/self/ns
>> ipc mnt net pid user uts
>>
>> What's the problem?
>>
>
> Does your system have system call setns?
grep setns /proc/kallsyms
and
grep setns the config.log of libvirt.
2014 Mar 28
48
[Bug 76732] New: Kworker using 100% CPU
https://bugs.freedesktop.org/show_bug.cgi?id=76732
Priority: medium
Bug ID: 76732
Assignee: nouveau at lists.freedesktop.org
Summary: Kworker using 100% CPU
QA Contact: xorg-team at lists.x.org
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: patrick.clara at gmail.com
2013 Nov 14
2
Re: Problem about lxc-enter-namespace interface
...g@debian:~$ <mailto:hzguanqiang@debian:~$> ls /proc/self/ns
> >> ipc mnt net pid user uts
> >>
> >> What's the problem?
> >>
> >
> > Does your system have system call setns?
>
> grep setns /proc/kallsyms
> and
> grep setns the config.log of libvirt.
>
>
> Hi, Gaofeng, thanks for your help. The info you want are:
>
Hi,
> hzguanqiang@debian:~/github/libvirt$ <mailto:hzguanqiang@debian:~/github/libvirt$> sudo grep setns /var/log/libvirt/libvirtd.log
conf...
2017 Oct 11
0
[PATCH v1 15/27] compiler: Option to default to hidden symbols
...ch/x86/include/asm/setup.h | 2 +-
arch/x86/kernel/cpu/microcode/core.c | 4 ++--
drivers/base/firmware_class.c | 4 ++--
include/asm-generic/sections.h | 6 ++++++
include/linux/compiler.h | 8 ++++++++
init/Kconfig | 7 +++++++
kernel/kallsyms.c | 16 ++++++++--------
kernel/trace/trace.h | 4 ++--
lib/dynamic_debug.c | 4 ++--
10 files changed, 39 insertions(+), 18 deletions(-)
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index ef5a9cc66fb8..d726c35bdd96 100644
--- a/ar...
2013 Nov 14
2
Re: Problem about lxc-enter-namespace interface
...; > >> ipc mnt net pid user uts
> > >>
> > >> What's the problem?
> > >>
> > >
> > > Does your system have system call setns?
> >
> > grep setns /proc/kallsyms
> > and
> > grep setns the config.log of libvirt.
> >
> >
> > Hi, Gaofeng, thanks for your help. The info you want are:
> >
>
> Hi,
>
> > hzguanqiang@debian:~/github/libvirt$ <mailto:hzg...
2007 Apr 18
1
[PATCH] lguest32 kallsyms backtrace of guest.
...2.6.21-rc5-mm2.orig/drivers/lguest/lguest.c
+++ linux-2.6.21-rc5-mm2/drivers/lguest/lguest.c
@@ -48,6 +48,14 @@ extern const char lgstart_iret[], lgend_
extern asmlinkage void lguest_maybe_init(void);
extern void lguest_iret(void);
+/* For back tracing from the HV */
+extern const unsigned long kallsyms_addresses[] __attribute__((weak));
+extern const unsigned long kallsyms_num_syms __attribute__((weak));
+extern const u8 kallsyms_names[] __attribute__((weak));
+extern const u8 kallsyms_token_table[] __attribute__((weak));
+extern const u16 kallsyms_token_index[] __attribute__((weak));
+extern co...
2007 Apr 18
1
[PATCH] lguest32 kallsyms backtrace of guest.
...2.6.21-rc5-mm2.orig/drivers/lguest/lguest.c
+++ linux-2.6.21-rc5-mm2/drivers/lguest/lguest.c
@@ -48,6 +48,14 @@ extern const char lgstart_iret[], lgend_
extern asmlinkage void lguest_maybe_init(void);
extern void lguest_iret(void);
+/* For back tracing from the HV */
+extern const unsigned long kallsyms_addresses[] __attribute__((weak));
+extern const unsigned long kallsyms_num_syms __attribute__((weak));
+extern const u8 kallsyms_names[] __attribute__((weak));
+extern const u8 kallsyms_token_table[] __attribute__((weak));
+extern const u16 kallsyms_token_index[] __attribute__((weak));
+extern co...
2013 Nov 20
1
[PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist
...h code may
> cause unexpected result (actually most of that area is already in
> the kprobe blacklist). So I've decide to prohibit probing all of
> them. [...]
Does this new blacklist cover enough that the kernel now survives a
broadly wildcarded perf-probe, e.g. over e.g. all of its kallsyms?
- FChE
2013 Nov 20
1
[PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist
...h code may
> cause unexpected result (actually most of that area is already in
> the kprobe blacklist). So I've decide to prohibit probing all of
> them. [...]
Does this new blacklist cover enough that the kernel now survives a
broadly wildcarded perf-probe, e.g. over e.g. all of its kallsyms?
- FChE
2013 Dec 09
2
Question about setns recognising in libvirt autoconf
...ce lxc --noseclabel /bin/df -hl
error: Cannot get namespaces for 3145: Function not implemented
It seems that setns is not supported by my kernel.
But from the following info, It seemed the reason is just libvirt/autoconf doesn't
recgonise setns.
root@debian:~/github/libvirt# grep setns /proc/kallsyms
ffffffff8105b78b T SyS_setns
ffffffff8105b78b T sys_setns
root@debian:~/github/libvirt# ./configure | grep setns
checking for setns... no
What the problem really is ? How can I fix this problem?
Thanks~
------------------
Best regards!
GuanQiang
2013-12-09