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Message-Id: <1422294449-12735-11-git-send-email-acme@kernel.org> Date: Mon, 26 Jan 2015 14:47:13 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Ingo Molnar <mingo@...nel.org> Cc: linux-kernel@...r.kernel.org, Cody P Schafer <cody@...ux.vnet.ibm.com>, Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>, Cody P Schafer <dev@...yps.com>, Haren Myneni <hbabu@...ibm.com>, Jiri Olsa <jolsa@...hat.com>, Michael Ellerman <mpe@...erman.id.au>, Paul Mackerras <paulus@...ba.org>, Peter Zijlstra <peterz@...radead.org>, linuxppc-dev@...ts.ozlabs.org, Arnaldo Carvalho de Melo <acme@...hat.com> Subject: [PATCH 10/26] perf Documentation: Add event parameters From: Cody P Schafer <cody@...ux.vnet.ibm.com> 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. Signed-off-by: Cody P Schafer <cody@...ux.vnet.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com> Acked-by: Jiri Olsa <jolsa@...nel.org> Cc: Cody P Schafer <dev@...yps.com> Cc: Haren Myneni <hbabu@...ibm.com> Cc: Jiri Olsa <jolsa@...hat.com> Cc: Michael Ellerman <mpe@...erman.id.au> Cc: Paul Mackerras <paulus@...ba.org> Cc: Peter Zijlstra <peterz@...radead.org> Cc: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com> Cc: linuxppc-dev@...ts.ozlabs.org Link: http://lkml.kernel.org/r/1420679633-28856-4-git-send-email-sukadev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> --- Documentation/ABI/testing/sysfs-bus-event_source-devices-events | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events index 20979f8b3edb..505f080d20a1 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -52,12 +52,18 @@ Description: Per-pmu performance monitoring events specific to the running syste event=0x2abc event=0x423,inv,cmask=0x3 domain=0x1,offset=0x8,starting_index=0xffff + domain=0x1,offset=0x8,core=? Each of the assignments indicates a value to be assigned to a particular set of bits (as defined by the format file corresponding to the <term>) in the perf_event structure passed to the perf_open syscall. + In the case of the last example, a value replacing "?" would + need to be provided by the user selecting the particular event. + This is referred to as "event parameterization". Event + parameters have the format 'param=?'. + What: /sys/bus/event_source/devices/<pmu>/events/<event>.unit Date: 2014/02/24 Contact: Linux kernel mailing list <linux-kernel@...r.kernel.org> -- 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/
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