| From: |
| Frederic Weisbecker <fweisbec@gmail.com> |
| To: |
| Ingo Molnar <mingo@elte.hu> |
| Subject: |
| [RFC GIT PULL] hw-breakpoints: Rewrite on top of perf counters |
| Date: |
| Thu, 10 Sep 2009 10:29:22 +0200 |
| Message-ID: |
| <1252571367-25876-1-git-send-email-fweisbec@gmail.com> |
| Cc: |
| LKML <linux-kernel@vger.kernel.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Prasad <prasad@linux.vnet.ibm.com>,
Alan Stern <stern@rowland.harvard.edu>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Jan Kiszka <jan.kiszka@siemens.com>,
Jiri Slaby <jirislaby@gmail.com>,
Li Zefan <lizf@cn.fujitsu.com>, Avi Kivity <avi@redhat.com>,
Paul Mackerras <paulus@samba.org>,
Mike Galbraith <efault@gmx.de>,
Masami Hiramatsu <mhiramat@redhat.com> |
| Archive‑link: | |
Article |
Hi,
This is a rewrite of the hardware breakpoints on top of perf counters.
Most of the details can be found in the 3rd and 4th patches.
To sum-up, this brings the perf tunable features that a perf
counter can perform:
- Hardware registers scheduling through a pmu
- Pinned/flexible, exlusive/non-exclusive, tunable periodic
events.
- Easier arch integration
- Optimized register allocation
There is still some work to do.
Beside the todo list found in individual patches:
- Fix a nasty bug: it doesn't properly free/unregister the breakpoint
after a use through ptrace. I should fix it soon.
- Drop the struct hw_breakpoint type and integrate the breakpoint core
fields into the counter structure (into the perf attributes)
Thanks,
Frederic.
---
The following changes since commit d6a65dffb30d8636b1e5d4c201564ef401a246cf:
Frederic Weisbecker (1):
tracing: Fix ring-buffer and ksym tracer merge interaction
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
tracing/hw-breakpoints
Frederic Weisbecker (4):
perf_counter: Add open/close pmu callbacks
perf_counter: Export various perf helpers for external users
hw-breakpoints: Rewrite the hw-breakpoints layer on top of perf counters
hw-breakpoints: Arbitrate access to pmu following registers constraints
Li Zefan (1):
ksym_tracer: Remove KSYM_SELFTEST_ENTRY
arch/Kconfig | 3 +
arch/x86/include/asm/debugreg.h | 7 -
arch/x86/include/asm/hw_breakpoint.h | 31 ++-
arch/x86/include/asm/processor.h | 10 +-
arch/x86/kernel/hw_breakpoint.c | 217 ++++++++------
arch/x86/kernel/process.c | 4 +-
arch/x86/kernel/process_32.c | 28 +--
arch/x86/kernel/process_64.c | 28 +--
arch/x86/kernel/ptrace.c | 163 +++++++----
arch/x86/kernel/smpboot.c | 3 -
arch/x86/power/cpu.c | 6 -
include/asm-generic/hw_breakpoint.h | 20 +-
include/linux/perf_counter.h | 42 +++
kernel/hw_breakpoint.c | 543 ++++++++++++++++++++--------------
kernel/perf_counter.c | 112 +++++--
kernel/trace/trace.h | 1 -
kernel/trace/trace_ksym.c | 151 +++++++---
kernel/trace/trace_selftest.c | 2 +-
18 files changed, 840 insertions(+), 531 deletions(-)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
