[PATCH] Add support for ARM 1176 Processor
Vince Weaver <vincent.weaver <at> maine.edu>
2013-02-07 21:10:12 GMT
This patch adds support for the ARM 1176 armv6 processor found in the
Raspberry Pi.
I've tested that libpfm4 with this patch works on a Raspberry Pi, but the
kernel installed on the board has broken perf_event support so I haven't
actually measured any performance events yet.
---
config.mk | 3 +
include/perfmon/pfmlib.h | 2 +
lib/Makefile | 2 +-
lib/events/arm_1176_events.h | 136 ++++++++++++++++++++++++++++++++++++++++++
lib/pfmlib_arm_armv6.c | 77 ++++++++++++++++++++++++
lib/pfmlib_common.c | 1 +
lib/pfmlib_priv.h | 1 +
7 files changed, 221 insertions(+), 1 deletion(-)
create mode 100644 lib/events/arm_1176_events.h
create mode 100644 lib/pfmlib_arm_armv6.c
diff --git a/config.mk b/config.mk
index 5f6adf2..b5cefc3 100644
--- a/config.mk
+++ b/config.mk
<at> <at> -57,6 +57,9 <at> <at> endif
ifeq (sparc64,$(findstring sparc64,$(ARCH)))
override ARCH=sparc
endif
+ifeq (armv6,$(findstring armv6,$(ARCH)))
+override ARCH=arm
+endif
ifeq (armv7,$(findstring armv7,$(ARCH)))
override ARCH=arm
endif
diff --git a/include/perfmon/pfmlib.h b/include/perfmon/pfmlib.h
index b122ca5..ac8f31e 100644
--- a/include/perfmon/pfmlib.h
+++ b/include/perfmon/pfmlib.h
<at> <at> -180,6 +180,8 <at> <at> typedef enum {
PFM_PMU_S390X_CPUM_CF, /* s390x: CPU-M counter facility */
+ PFM_PMU_ARM_1176, /* ARM 1176 */
+
/* MUST ADD NEW PMU MODELS HERE */
PFM_PMU_MAX /* end marker */
diff --git a/lib/Makefile b/lib/Makefile
index d2f00a9..0c288d3 100644
--- a/lib/Makefile
+++ b/lib/Makefile
<at> <at> -127,7 +127,7 <at> <at> SRCS += pfmlib_arm_perf_event.c
endif
INCARCH = $(INC_ARM)
-SRCS += pfmlib_arm.c pfmlib_arm_armv7_pmuv1.c
+SRCS += pfmlib_arm.c pfmlib_arm_armv7_pmuv1.c pfmlib_arm_armv6.c
CFLAGS += -DCONFIG_PFMLIB_ARCH_ARM
endif
diff --git a/lib/events/arm_1176_events.h b/lib/events/arm_1176_events.h
new file mode 100644
index 0000000..35a43fa
--- /dev/null
+++ b/lib/events/arm_1176_events.h
<at> <at> -0,0 +1,136 <at> <at>
+/*
+ * Copyright (c) 2013 by Vince Weaver <vincent.weaver <at> maine.edu>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * This file is part of libpfm, a performance monitoring support library for
+ * applications on Linux.
+ */
+
+/*
+ * the various event names are the same as those given in the
+ * file linux-2.6/arch/arm/kernel/perf_event_v6.c
+ */
+
+/*
+ * ARM1176 Event Table
+ */
+static const arm_entry_t arm_1176_pe []={
+ {.name = "ICACHE_MISS",
+ .code = 0x00,
+ .desc = "Instruction cache miss (includes speculative accesses)"
+ },
+ {.name = "IBUF_STALL",
+ .code = 0x01,
+ .desc = "Stall because instruction buffer cannot deliver an instruction"
+ },
+ {.name = "DDEP_STALL",
+ .code = 0x02,
+ .desc = "Stall because of data dependency"
+ },
+ {.name = "ITLB_MISS",
+ .code = 0x03,
+ .desc = "Instruction MicroTLB miss"
+ },
+ {.name = "DTLB_MISS",
+ .code = 0x04,
+ .desc = "Data MicroTLB miss"
+ },
+ {.name = "BR_EXEC",
+ .code = 0x05,
+ .desc = "Branch instruction executed"
+ },
+ {.name = "BR_MISPREDICT",
+ .code = 0x06,
+ .desc = "Branch mispredicted"
+ },
+ {.name = "INSTR_EXEC",
+ .code = 0x07,
+ .desc = "Instruction executed"
+ },
+ {.name = "DCACHE_HIT",
+ .code = 0x09,
+ .desc = "Data cache hit"
+ },
+ {.name = "DCACHE_ACCESS",
+ .code = 0x0a,
+ .desc = "Data cache access"
+ },
+ {.name = "DCACHE_MISS",
+ .code = 0x0b,
+ .desc = "Data cache miss"
+ },
+ {.name = "DCACHE_WBACK",
+ .code = 0x0c,
+ .desc = "Data cache writeback"
+ },
+ {.name = "SW_PC_CHANGE",
+ .code = 0x0d,
+ .desc = "Software changed the PC."
+ },
+ {.name = "MAIN_TLB_MISS",
+ .code = 0x0f,
+ .desc = "Main TLB miss"
+ },
+ {.name = "EXPL_D_ACCESS",
+ .code = 0x10,
+ .desc = "Explicit external data cache access "
+ },
+ {.name = "LSU_FULL_STALL",
+ .code = 0x11,
+ .desc = "Stall because of a full Load Store Unit request queue."
+ },
+ {.name = "WBUF_DRAINED",
+ .code = 0x12,
+ .desc = "Write buffer drained due to data synchronization barrier or strongly ordered operation"
+ },
+ {.name = "ETMEXTOUT_0",
+ .code = 0x20,
+ .desc = "ETMEXTOUT[0] was asserted"
+ },
+ {.name = "ETMEXTOUT_1",
+ .code = 0x21,
+ .desc = "ETMEXTOUT[1] was asserted"
+ },
+ {.name = "ETMEXTOUT",
+ .code = 0x22,
+ .desc = "Increment once for each of ETMEXTOUT[0] or ETMEXTOUT[1]"
+ },
+ {.name = "PROC_CALL_EXEC",
+ .code = 0x23,
+ .desc = "Procedure call instruction executed"
+ },
+ {.name = "PROC_RET_EXEC",
+ .code = 0x24,
+ .desc = "Procedure return instruction executed"
+ },
+ {.name = "PROC_RET_EXEC_PRED",
+ .code = 0x25,
+ .desc = "Proceudre return instruction executed and address predicted"
+ },
+ {.name = "PROC_RET_EXEC_PRED_INCORRECT",
+ .code = 0x26,
+ .desc = "Procedure return instruction executed and address predicted incorrectly"
+ },
+ {.name = "CPU_CYCLES",
+ .code = 0xff,
+ .desc = "CPU cycles"
+ },
+};
+
+#define ARM_1176_EVENT_COUNT (sizeof(arm_1176_pe)/sizeof(arm_entry_t))
diff --git a/lib/pfmlib_arm_armv6.c b/lib/pfmlib_arm_armv6.c
new file mode 100644
index 0000000..d59b402
--- /dev/null
+++ b/lib/pfmlib_arm_armv6.c
<at> <at> -0,0 +1,77 <at> <at>
+/*
+ * pfmlib_arm_armv6.c : support for ARMv6 chips
+ *
+ * Copyright (c) 2013 by Vince Weaver <vincent.weaver <at> maine.edu>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include <sys/types.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+/* private headers */
+#include "pfmlib_priv.h" /* library private */
+#include "pfmlib_arm_priv.h"
+
+#include "events/arm_1176_events.h" /* event tables */
+
+static int
+pfm_arm_detect_1176(void *this)
+{
+
+ int ret;
+
+ ret = pfm_arm_detect(this);
+ if (ret != PFM_SUCCESS)
+ return PFM_ERR_NOTSUPP;
+
+ if ((pfm_arm_cfg.implementer == 0x41) && /* ARM */
+ (pfm_arm_cfg.part==0xb76)) { /* 1176 */
+ return PFM_SUCCESS;
+ }
+ return PFM_ERR_NOTSUPP;
+}
+
+/* ARM1176 support */
+pfmlib_pmu_t arm_1176_support={
+ .desc = "ARM1176",
+ .name = "arm_1176",
+ .pmu = PFM_PMU_ARM_1176,
+ .pme_count = LIBPFM_ARRAY_SIZE(arm_1176_pe),
+ .type = PFM_PMU_TYPE_CORE,
+ .pe = arm_1176_pe,
+
+ .pmu_detect = pfm_arm_detect_1176,
+ .max_encoding = 1,
+ .num_cntrs = 2,
+
+ .get_event_encoding[PFM_OS_NONE] = pfm_arm_get_encoding,
+ PFMLIB_ENCODE_PERF(pfm_arm_get_perf_encoding),
+ .get_event_first = pfm_arm_get_event_first,
+ .get_event_next = pfm_arm_get_event_next,
+ .event_is_valid = pfm_arm_event_is_valid,
+ .validate_table = pfm_arm_validate_table,
+ .get_event_info = pfm_arm_get_event_info,
+ .get_event_attr_info = pfm_arm_get_event_attr_info,
+ PFMLIB_VALID_PERF_PATTRS(pfm_arm_perf_validate_pattrs),
+ .get_event_nattrs = pfm_arm_get_event_nattrs,
+};
diff --git a/lib/pfmlib_common.c b/lib/pfmlib_common.c
index c29a325..87f6a01 100644
--- a/lib/pfmlib_common.c
+++ b/lib/pfmlib_common.c
<at> <at> -152,6 +152,7 <at> <at> static pfmlib_pmu_t *pfmlib_pmus[]=
&arm_cortex_a8_support,
&arm_cortex_a9_support,
&arm_cortex_a15_support,
+ &arm_1176_support,
#endif
#ifdef CONFIG_PFMLIB_ARCH_S390X
&s390x_cpum_cf_support,
diff --git a/lib/pfmlib_priv.h b/lib/pfmlib_priv.h
index 8d3353d..b57aa10 100644
--- a/lib/pfmlib_priv.h
+++ b/lib/pfmlib_priv.h
<at> <at> -274,6 +274,7 <at> <at> extern pfmlib_pmu_t intel_wsm_unc_support;
extern pfmlib_pmu_t arm_cortex_a8_support;
extern pfmlib_pmu_t arm_cortex_a9_support;
extern pfmlib_pmu_t arm_cortex_a15_support;
+extern pfmlib_pmu_t arm_1176_support;
extern pfmlib_pmu_t mips_74k_support;
extern pfmlib_pmu_t s390x_cpum_cf_support;
--
--
1.7.10.4
------------------------------------------------------------------------------
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When I first started gathering results there weren't any IVB or SNB
machines, and I just kept collecting the same set of events.
With x87 there is often a "gather all x87 ops" event. As we all know
there's no direct SSE equivelent, you end up needing to collect like 5
different events and add them all up, and I don't think anyone has really
tested that that gives you anything useful.
> Yeah, that's why I suggested the need for a libpfm4 hack, since you were
> hacking anyway 
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