| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1401236684-10579-1-git-send-email-dev@codyps.com>
Date: Tue, 27 May 2014 17:21:55 -0700
From: Cody P Schafer <dev@...yps.com>
To: LKML <linux-kernel@...r.kernel.org>,
Linux PPC <linuxppc-dev@...ts.ozlabs.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Andi Kleen <ak@...ux.intel.com>,
Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Borislav Petkov <bp@...e.de>, Cody P Schafer <dev@...yps.com>,
David Ahern <dsahern@...il.com>,
Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
Michael Ellerman <mpe@...erman.id.au>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Runzhen Wang <runzhen@...ux.vnet.ibm.com>,
Stephane Eranian <eranian@...gle.com>,
Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc: linux-doc@...r.kernel.org
Subject: [PATCH 00/16] perf: add support for parameterized events from sysfs (powerpc 24x7)
What this patchset does:
- the first patch (override sysfs in tools/perf via SYSFS_PATH) was sent out
previously, but needed a resend anyhow. Having it is useful for testing the
later changes to tools/perf.
- the second patch is a bugfix to the powerpc hv-24x7 code which was
previously sent out, which is a good idea to have when testing these patches
on POWER8 hardware.
- document perf sysfs and the changes to add parameterized events
- semi-notably: removes the growing list of specific POWER cpu events and
begins documenting them generically, much like the docs for
/sys/modules/MODULENAME do for modules.
- tools/perf changes to support parameterized events
- export some parameterized events from the powerpc pmus hv_24x7 and hv_gpci
Description of "event parameters" from the documentation patch:
Event parameters are a basic way for partial events to be specified in
sysfs with per-event names given to the fields that need to be filled in
when using a particular event.
It is intended for supporting cases where the single 'cpu' parameter is
insufficient. For example, POWER 8 has events for physical
sockets/cores/cpus that are accessible from with virtual machines. To
keep using the single 'cpu' parameter we'd need to perform a mapping
between Linux's cpus and the physical machine's cpus (in this case
Linux is running under a hypervisor). This isn't possible because
bindings between our cpus and physical cpus may not be fixed, and we
probably won't have a "cpu" on each physical cpu.
Description of the sysfs contents when events are parameterized (copied from an
included patch):
Examples:
domain=0x1,offset=0x8,starting_index=phys_cpu
In the case of the last example, a value replacing "phys_cpu"
would need to be provided by the user selecting the particular
event. This is refered to as "event parameterization". All
non-numerical values indicate an event parameter.
Notes on how perf-list displays parameterized events (and how to use them,
again culled from an included patch):
PARAMETERIZED EVENTS
--------------------
Some pmu events listed by 'perf-list' will be displayed with '?' in them. For
example:
hv_gpci/dtbp_ptitc,phys_processor_idx=?/
This means that when provided as an event, a value for phys_processor_idx must
also be supplied. For example:
perf stat -e 'hv_gpci/dtbp_ptitc,phys_processor_idx=0x2/' ...
Cody P Schafer (16):
tools/perf: allow overriding sysfs and proc finding with env var
powerpc/perf/hv-24x7: use kmem_cache instead of aligned stack
allocations
perf Documentation: sysfs events/ interfaces
perf Documentation: remove duplicated docs for powerpc cpu specific
events
perf Documentation: add event parameters
tools/perf: annotate list_head with type info
tools/perf: support parsing parameterized events
tools/perf: extend format_alias() to include event parameters
tools/perf: document parameterized events and note symbolically formed
events
perf: provide sysfs_show for struct perf_pmu_events_attr
byteorder: provide a linux/byteorder.h with {be,le}_to_cpu() and
cpu_to_{be,le}() macros
powerpc/perf/hv-24x7: parse catalog and populate sysfs with events
powerpc/perf/hv-24x7: Documentaion for new sysfs entries which expose
descriptions
perf: add PMU_EVENT_ATTR_STRING() helper
powerpc/perf/{hv-gpci,hv-common}: generate requests with counters
annotated
powerpc/perf/hv-gpci: add the remaining gpci requests
.../testing/sysfs-bus-event_source-devices-events | 617 ++--------------
.../testing/sysfs-bus-event_source-devices-hv_24x7 | 22 +
arch/powerpc/perf/hv-24x7-catalog.h | 25 +
arch/powerpc/perf/hv-24x7-domains.h | 19 +
arch/powerpc/perf/hv-24x7.c | 812 ++++++++++++++++++++-
arch/powerpc/perf/hv-24x7.h | 12 +-
arch/powerpc/perf/hv-common.c | 10 +-
arch/powerpc/perf/hv-gpci-requests.h | 258 +++++++
arch/powerpc/perf/hv-gpci.c | 8 +
arch/powerpc/perf/hv-gpci.h | 37 +-
arch/powerpc/perf/req-gen/_begin.h | 13 +
arch/powerpc/perf/req-gen/_clear.h | 5 +
arch/powerpc/perf/req-gen/_end.h | 4 +
arch/powerpc/perf/req-gen/_request-begin.h | 15 +
arch/powerpc/perf/req-gen/_request-end.h | 8 +
arch/powerpc/perf/req-gen/perf.h | 155 ++++
include/linux/byteorder.h | 34 +
include/linux/perf_event.h | 10 +
kernel/events/core.c | 8 +
tools/lib/api/fs/fs.c | 43 +-
tools/perf/Documentation/perf-list.txt | 13 +
tools/perf/Documentation/perf-record.txt | 5 +
tools/perf/util/parse-events.h | 1 +
tools/perf/util/pmu.c | 85 ++-
tools/perf/util/pmu.h | 6 +-
25 files changed, 1589 insertions(+), 636 deletions(-)
create mode 100644 arch/powerpc/perf/hv-24x7-domains.h
create mode 100644 arch/powerpc/perf/hv-gpci-requests.h
create mode 100644 arch/powerpc/perf/req-gen/_begin.h
create mode 100644 arch/powerpc/perf/req-gen/_clear.h
create mode 100644 arch/powerpc/perf/req-gen/_end.h
create mode 100644 arch/powerpc/perf/req-gen/_request-begin.h
create mode 100644 arch/powerpc/perf/req-gen/_request-end.h
create mode 100644 arch/powerpc/perf/req-gen/perf.h
create mode 100644 include/linux/byteorder.h
--
1.9.3
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists