search for: kallsym

Displaying 20 results from an estimated 147 matches for "kallsym".

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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