svn commit: r197547 - in user/rpaulo/armpmc: arm arm/include dev
dev/hwpmc sys
Rui Paulo
rpaulo at FreeBSD.org
Sun Sep 27 22:45:15 UTC 2009
Author: rpaulo
Date: Sun Sep 27 22:45:15 2009
New Revision: 197547
URL: http://svn.freebsd.org/changeset/base/197547
Log:
Populate from HEAD.
Added:
user/rpaulo/armpmc/arm/
user/rpaulo/armpmc/arm/include/
user/rpaulo/armpmc/arm/include/pmc_mdep.h
- copied unchanged from r197546, head/sys/arm/include/pmc_mdep.h
user/rpaulo/armpmc/dev/
user/rpaulo/armpmc/dev/hwpmc/
user/rpaulo/armpmc/dev/hwpmc/hwpmc_arm.c
- copied unchanged from r197546, head/sys/dev/hwpmc/hwpmc_arm.c
user/rpaulo/armpmc/sys/
user/rpaulo/armpmc/sys/pmc.h
- copied unchanged from r197546, head/sys/sys/pmc.h
Copied: user/rpaulo/armpmc/arm/include/pmc_mdep.h (from r197546, head/sys/arm/include/pmc_mdep.h)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/rpaulo/armpmc/arm/include/pmc_mdep.h Sun Sep 27 22:45:15 2009 (r197547, copy of r197546, head/sys/arm/include/pmc_mdep.h)
@@ -0,0 +1,28 @@
+/*-
+ * This file is in the public domain.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_PMC_MDEP_H_
+#define _MACHINE_PMC_MDEP_H_
+
+union pmc_md_op_pmcallocate {
+ uint64_t __pad[4];
+};
+
+/* Logging */
+#define PMCLOG_READADDR PMCLOG_READ32
+#define PMCLOG_EMITADDR PMCLOG_EMIT32
+
+#if _KERNEL
+union pmc_md_pmc {
+};
+
+#define PMC_TRAPFRAME_TO_PC(TF) (0) /* Stubs */
+#define PMC_TRAPFRAME_TO_FP(TF) (0)
+#define PMC_TRAPFRAME_TO_SP(TF) (0)
+
+#endif
+
+#endif /* !_MACHINE_PMC_MDEP_H_ */
Copied: user/rpaulo/armpmc/dev/hwpmc/hwpmc_arm.c (from r197546, head/sys/dev/hwpmc/hwpmc_arm.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/rpaulo/armpmc/dev/hwpmc/hwpmc_arm.c Sun Sep 27 22:45:15 2009 (r197547, copy of r197546, head/sys/dev/hwpmc/hwpmc_arm.c)
@@ -0,0 +1,66 @@
+/*-
+ * Copyright (c) 2005, Joseph Koshy
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/pmc.h>
+
+#include <machine/pmc_mdep.h>
+
+struct pmc_mdep *
+pmc_md_initialize()
+{
+ return NULL;
+}
+
+void
+pmc_md_finalize(struct pmc_mdep *md)
+{
+ (void) md;
+}
+
+int
+pmc_save_kernel_callchain(uintptr_t *cc, int maxsamples,
+ struct trapframe *tf)
+{
+ (void) cc;
+ (void) maxsamples;
+ (void) tf;
+ return (0);
+}
+
+int
+pmc_save_user_callchain(uintptr_t *cc, int maxsamples,
+ struct trapframe *tf)
+{
+ (void) cc;
+ (void) maxsamples;
+ (void) tf;
+ return (0);
+}
Copied: user/rpaulo/armpmc/sys/pmc.h (from r197546, head/sys/sys/pmc.h)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/rpaulo/armpmc/sys/pmc.h Sun Sep 27 22:45:15 2009 (r197547, copy of r197546, head/sys/sys/pmc.h)
@@ -0,0 +1,1056 @@
+/*-
+ * Copyright (c) 2003-2008, Joseph Koshy
+ * Copyright (c) 2007 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by A. Joseph Koshy under
+ * sponsorship from the FreeBSD Foundation and Google, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_PMC_H_
+#define _SYS_PMC_H_
+
+#include <dev/hwpmc/pmc_events.h>
+
+#include <machine/pmc_mdep.h>
+#include <machine/profile.h>
+
+#define PMC_MODULE_NAME "hwpmc"
+#define PMC_NAME_MAX 16 /* HW counter name size */
+#define PMC_CLASS_MAX 4 /* max #classes of PMCs per-system */
+
+/*
+ * Kernel<->userland API version number [MMmmpppp]
+ *
+ * Major numbers are to be incremented when an incompatible change to
+ * the ABI occurs that older clients will not be able to handle.
+ *
+ * Minor numbers are incremented when a backwards compatible change
+ * occurs that allows older correct programs to run unchanged. For
+ * example, when support for a new PMC type is added.
+ *
+ * The patch version is incremented for every bug fix.
+ */
+#define PMC_VERSION_MAJOR 0x03
+#define PMC_VERSION_MINOR 0x01
+#define PMC_VERSION_PATCH 0x0000
+
+#define PMC_VERSION (PMC_VERSION_MAJOR << 24 | \
+ PMC_VERSION_MINOR << 16 | PMC_VERSION_PATCH)
+
+/*
+ * Kinds of CPUs known.
+ *
+ * We keep track of CPU variants that need to be distinguished in
+ * some way for PMC operations. CPU names are grouped by manufacturer
+ * and numbered sparsely in order to minimize changes to the ABI involved
+ * when new CPUs are added.
+ */
+
+#define __PMC_CPUS() \
+ __PMC_CPU(AMD_K7, 0x00, "AMD K7") \
+ __PMC_CPU(AMD_K8, 0x01, "AMD K8") \
+ __PMC_CPU(INTEL_P5, 0x80, "Intel Pentium") \
+ __PMC_CPU(INTEL_P6, 0x81, "Intel Pentium Pro") \
+ __PMC_CPU(INTEL_CL, 0x82, "Intel Celeron") \
+ __PMC_CPU(INTEL_PII, 0x83, "Intel Pentium II") \
+ __PMC_CPU(INTEL_PIII, 0x84, "Intel Pentium III") \
+ __PMC_CPU(INTEL_PM, 0x85, "Intel Pentium M") \
+ __PMC_CPU(INTEL_PIV, 0x86, "Intel Pentium IV") \
+ __PMC_CPU(INTEL_CORE, 0x87, "Intel Core Solo/Duo") \
+ __PMC_CPU(INTEL_CORE2, 0x88, "Intel Core2") \
+ __PMC_CPU(INTEL_CORE2EXTREME, 0x89, "Intel Core2 Extreme") \
+ __PMC_CPU(INTEL_ATOM, 0x8A, "Intel Atom") \
+ __PMC_CPU(INTEL_COREI7, 0x8B, "Intel Core i7")
+
+enum pmc_cputype {
+#undef __PMC_CPU
+#define __PMC_CPU(S,V,D) PMC_CPU_##S = V,
+ __PMC_CPUS()
+};
+
+#define PMC_CPU_FIRST PMC_CPU_AMD_K7
+#define PMC_CPU_LAST PMC_CPU_INTEL_COREI7
+
+/*
+ * Classes of PMCs
+ */
+
+#define __PMC_CLASSES() \
+ __PMC_CLASS(TSC) /* CPU Timestamp counter */ \
+ __PMC_CLASS(K7) /* AMD K7 performance counters */ \
+ __PMC_CLASS(K8) /* AMD K8 performance counters */ \
+ __PMC_CLASS(P5) /* Intel Pentium counters */ \
+ __PMC_CLASS(P6) /* Intel Pentium Pro counters */ \
+ __PMC_CLASS(P4) /* Intel Pentium-IV counters */ \
+ __PMC_CLASS(IAF) /* Intel Core2/Atom, fixed function */ \
+ __PMC_CLASS(IAP) /* Intel Core...Atom, programmable */
+
+enum pmc_class {
+#undef __PMC_CLASS
+#define __PMC_CLASS(N) PMC_CLASS_##N ,
+ __PMC_CLASSES()
+};
+
+#define PMC_CLASS_FIRST PMC_CLASS_TSC
+#define PMC_CLASS_LAST PMC_CLASS_IAP
+
+/*
+ * A PMC can be in the following states:
+ *
+ * Hardware states:
+ * DISABLED -- administratively prohibited from being used.
+ * FREE -- HW available for use
+ * Software states:
+ * ALLOCATED -- allocated
+ * STOPPED -- allocated, but not counting events
+ * RUNNING -- allocated, and in operation; 'pm_runcount'
+ * holds the number of CPUs using this PMC at
+ * a given instant
+ * DELETED -- being destroyed
+ */
+
+#define __PMC_HWSTATES() \
+ __PMC_STATE(DISABLED) \
+ __PMC_STATE(FREE)
+
+#define __PMC_SWSTATES() \
+ __PMC_STATE(ALLOCATED) \
+ __PMC_STATE(STOPPED) \
+ __PMC_STATE(RUNNING) \
+ __PMC_STATE(DELETED)
+
+#define __PMC_STATES() \
+ __PMC_HWSTATES() \
+ __PMC_SWSTATES()
+
+enum pmc_state {
+#undef __PMC_STATE
+#define __PMC_STATE(S) PMC_STATE_##S,
+ __PMC_STATES()
+ __PMC_STATE(MAX)
+};
+
+#define PMC_STATE_FIRST PMC_STATE_DISABLED
+#define PMC_STATE_LAST PMC_STATE_DELETED
+
+/*
+ * An allocated PMC may used as a 'global' counter or as a
+ * 'thread-private' one. Each such mode of use can be in either
+ * statistical sampling mode or in counting mode. Thus a PMC in use
+ *
+ * SS i.e., SYSTEM STATISTICAL -- system-wide statistical profiling
+ * SC i.e., SYSTEM COUNTER -- system-wide counting mode
+ * TS i.e., THREAD STATISTICAL -- thread virtual, statistical profiling
+ * TC i.e., THREAD COUNTER -- thread virtual, counting mode
+ *
+ * Statistical profiling modes rely on the PMC periodically delivering
+ * a interrupt to the CPU (when the configured number of events have
+ * been measured), so the PMC must have the ability to generate
+ * interrupts.
+ *
+ * In counting modes, the PMC counts its configured events, with the
+ * value of the PMC being read whenever needed by its owner process.
+ *
+ * The thread specific modes "virtualize" the PMCs -- the PMCs appear
+ * to be thread private and count events only when the profiled thread
+ * actually executes on the CPU.
+ *
+ * The system-wide "global" modes keep the PMCs running all the time
+ * and are used to measure the behaviour of the whole system.
+ */
+
+#define __PMC_MODES() \
+ __PMC_MODE(SS, 0) \
+ __PMC_MODE(SC, 1) \
+ __PMC_MODE(TS, 2) \
+ __PMC_MODE(TC, 3)
+
+enum pmc_mode {
+#undef __PMC_MODE
+#define __PMC_MODE(M,N) PMC_MODE_##M = N,
+ __PMC_MODES()
+};
+
+#define PMC_MODE_FIRST PMC_MODE_SS
+#define PMC_MODE_LAST PMC_MODE_TC
+
+#define PMC_IS_COUNTING_MODE(mode) \
+ ((mode) == PMC_MODE_SC || (mode) == PMC_MODE_TC)
+#define PMC_IS_SYSTEM_MODE(mode) \
+ ((mode) == PMC_MODE_SS || (mode) == PMC_MODE_SC)
+#define PMC_IS_SAMPLING_MODE(mode) \
+ ((mode) == PMC_MODE_SS || (mode) == PMC_MODE_TS)
+#define PMC_IS_VIRTUAL_MODE(mode) \
+ ((mode) == PMC_MODE_TS || (mode) == PMC_MODE_TC)
+
+/*
+ * PMC row disposition
+ */
+
+#define __PMC_DISPOSITIONS(N) \
+ __PMC_DISP(STANDALONE) /* global/disabled counters */ \
+ __PMC_DISP(FREE) /* free/available */ \
+ __PMC_DISP(THREAD) /* thread-virtual PMCs */ \
+ __PMC_DISP(UNKNOWN) /* sentinel */
+
+enum pmc_disp {
+#undef __PMC_DISP
+#define __PMC_DISP(D) PMC_DISP_##D ,
+ __PMC_DISPOSITIONS()
+};
+
+#define PMC_DISP_FIRST PMC_DISP_STANDALONE
+#define PMC_DISP_LAST PMC_DISP_THREAD
+
+/*
+ * Counter capabilities
+ *
+ * __PMC_CAPS(NAME, VALUE, DESCRIPTION)
+ */
+
+#define __PMC_CAPS() \
+ __PMC_CAP(INTERRUPT, 0, "generate interrupts") \
+ __PMC_CAP(USER, 1, "count user-mode events") \
+ __PMC_CAP(SYSTEM, 2, "count system-mode events") \
+ __PMC_CAP(EDGE, 3, "do edge detection of events") \
+ __PMC_CAP(THRESHOLD, 4, "ignore events below a threshold") \
+ __PMC_CAP(READ, 5, "read PMC counter") \
+ __PMC_CAP(WRITE, 6, "reprogram PMC counter") \
+ __PMC_CAP(INVERT, 7, "invert comparision sense") \
+ __PMC_CAP(QUALIFIER, 8, "further qualify monitored events") \
+ __PMC_CAP(PRECISE, 9, "perform precise sampling") \
+ __PMC_CAP(TAGGING, 10, "tag upstream events") \
+ __PMC_CAP(CASCADE, 11, "cascade counters")
+
+enum pmc_caps
+{
+#undef __PMC_CAP
+#define __PMC_CAP(NAME, VALUE, DESCR) PMC_CAP_##NAME = (1 << VALUE) ,
+ __PMC_CAPS()
+};
+
+#define PMC_CAP_FIRST PMC_CAP_INTERRUPT
+#define PMC_CAP_LAST PMC_CAP_CASCADE
+
+/*
+ * PMC Event Numbers
+ *
+ * These are generated from the definitions in "dev/hwpmc/pmc_events.h".
+ */
+
+enum pmc_event {
+#undef __PMC_EV
+#undef __PMC_EV_BLOCK
+#define __PMC_EV_BLOCK(C,V) PMC_EV_ ## C ## __BLOCK_START = (V) - 1 ,
+#define __PMC_EV(C,N) PMC_EV_ ## C ## _ ## N ,
+ __PMC_EVENTS()
+};
+
+/*
+ * PMC SYSCALL INTERFACE
+ */
+
+/*
+ * "PMC_OPS" -- these are the commands recognized by the kernel
+ * module, and are used when performing a system call from userland.
+ */
+#define __PMC_OPS() \
+ __PMC_OP(CONFIGURELOG, "Set log file") \
+ __PMC_OP(FLUSHLOG, "Flush log file") \
+ __PMC_OP(GETCPUINFO, "Get system CPU information") \
+ __PMC_OP(GETDRIVERSTATS, "Get driver statistics") \
+ __PMC_OP(GETMODULEVERSION, "Get module version") \
+ __PMC_OP(GETPMCINFO, "Get per-cpu PMC information") \
+ __PMC_OP(PMCADMIN, "Set PMC state") \
+ __PMC_OP(PMCALLOCATE, "Allocate and configure a PMC") \
+ __PMC_OP(PMCATTACH, "Attach a PMC to a process") \
+ __PMC_OP(PMCDETACH, "Detach a PMC from a process") \
+ __PMC_OP(PMCGETMSR, "Get a PMC's hardware address") \
+ __PMC_OP(PMCRELEASE, "Release a PMC") \
+ __PMC_OP(PMCRW, "Read/Set a PMC") \
+ __PMC_OP(PMCSETCOUNT, "Set initial count/sampling rate") \
+ __PMC_OP(PMCSTART, "Start a PMC") \
+ __PMC_OP(PMCSTOP, "Start a PMC") \
+ __PMC_OP(WRITELOG, "Write a cookie to the log file")
+
+
+enum pmc_ops {
+#undef __PMC_OP
+#define __PMC_OP(N, D) PMC_OP_##N,
+ __PMC_OPS()
+};
+
+
+/*
+ * Flags used in operations on PMCs.
+ */
+
+#define PMC_F_FORCE 0x00000001 /*OP ADMIN force operation */
+#define PMC_F_DESCENDANTS 0x00000002 /*OP ALLOCATE track descendants */
+#define PMC_F_LOG_PROCCSW 0x00000004 /*OP ALLOCATE track ctx switches */
+#define PMC_F_LOG_PROCEXIT 0x00000008 /*OP ALLOCATE log proc exits */
+#define PMC_F_NEWVALUE 0x00000010 /*OP RW write new value */
+#define PMC_F_OLDVALUE 0x00000020 /*OP RW get old value */
+#define PMC_F_KGMON 0x00000040 /*OP ALLOCATE kgmon(8) profiling */
+/* V2 API */
+#define PMC_F_CALLCHAIN 0x00000080 /*OP ALLOCATE capture callchains */
+
+/* internal flags */
+#define PMC_F_ATTACHED_TO_OWNER 0x00010000 /*attached to owner*/
+#define PMC_F_NEEDS_LOGFILE 0x00020000 /*needs log file */
+#define PMC_F_ATTACH_DONE 0x00040000 /*attached at least once */
+
+#define PMC_CALLCHAIN_DEPTH_MAX 32
+#define PMC_CC_F_USERSPACE 0x01 /*userspace callchain*/
+
+/*
+ * Cookies used to denote allocated PMCs, and the values of PMCs.
+ */
+
+typedef uint32_t pmc_id_t;
+typedef uint64_t pmc_value_t;
+
+#define PMC_ID_INVALID (~ (pmc_id_t) 0)
+
+/*
+ * PMC IDs have the following format:
+ *
+ * +--------+----------+-----------+-----------+
+ * | CPU | PMC MODE | PMC CLASS | ROW INDEX |
+ * +--------+----------+-----------+-----------+
+ *
+ * where each field is 8 bits wide. Field 'CPU' is set to the
+ * requested CPU for system-wide PMCs or PMC_CPU_ANY for process-mode
+ * PMCs. Field 'PMC MODE' is the allocated PMC mode. Field 'PMC
+ * CLASS' is the class of the PMC. Field 'ROW INDEX' is the row index
+ * for the PMC.
+ *
+ * The 'ROW INDEX' ranges over 0..NWPMCS where NHWPMCS is the total
+ * number of hardware PMCs on this cpu.
+ */
+
+
+#define PMC_ID_TO_ROWINDEX(ID) ((ID) & 0xFF)
+#define PMC_ID_TO_CLASS(ID) (((ID) & 0xFF00) >> 8)
+#define PMC_ID_TO_MODE(ID) (((ID) & 0xFF0000) >> 16)
+#define PMC_ID_TO_CPU(ID) (((ID) & 0xFF000000) >> 24)
+#define PMC_ID_MAKE_ID(CPU,MODE,CLASS,ROWINDEX) \
+ ((((CPU) & 0xFF) << 24) | (((MODE) & 0xFF) << 16) | \
+ (((CLASS) & 0xFF) << 8) | ((ROWINDEX) & 0xFF))
+
+/*
+ * Data structures for system calls supported by the pmc driver.
+ */
+
+/*
+ * OP PMCALLOCATE
+ *
+ * Allocate a PMC on the named CPU.
+ */
+
+#define PMC_CPU_ANY ~0
+
+struct pmc_op_pmcallocate {
+ uint32_t pm_caps; /* PMC_CAP_* */
+ uint32_t pm_cpu; /* CPU number or PMC_CPU_ANY */
+ enum pmc_class pm_class; /* class of PMC desired */
+ enum pmc_event pm_ev; /* [enum pmc_event] desired */
+ uint32_t pm_flags; /* additional modifiers PMC_F_* */
+ enum pmc_mode pm_mode; /* desired mode */
+ pmc_id_t pm_pmcid; /* [return] process pmc id */
+
+ union pmc_md_op_pmcallocate pm_md; /* MD layer extensions */
+};
+
+/*
+ * OP PMCADMIN
+ *
+ * Set the administrative state (i.e., whether enabled or disabled) of
+ * a PMC 'pm_pmc' on CPU 'pm_cpu'. Note that 'pm_pmc' specifies an
+ * absolute PMC number and need not have been first allocated by the
+ * calling process.
+ */
+
+struct pmc_op_pmcadmin {
+ int pm_cpu; /* CPU# */
+ uint32_t pm_flags; /* flags */
+ int pm_pmc; /* PMC# */
+ enum pmc_state pm_state; /* desired state */
+};
+
+/*
+ * OP PMCATTACH / OP PMCDETACH
+ *
+ * Attach/detach a PMC and a process.
+ */
+
+struct pmc_op_pmcattach {
+ pmc_id_t pm_pmc; /* PMC to attach to */
+ pid_t pm_pid; /* target process */
+};
+
+/*
+ * OP PMCSETCOUNT
+ *
+ * Set the sampling rate (i.e., the reload count) for statistical counters.
+ * 'pm_pmcid' need to have been previously allocated using PMCALLOCATE.
+ */
+
+struct pmc_op_pmcsetcount {
+ pmc_value_t pm_count; /* initial/sample count */
+ pmc_id_t pm_pmcid; /* PMC id to set */
+};
+
+
+/*
+ * OP PMCRW
+ *
+ * Read the value of a PMC named by 'pm_pmcid'. 'pm_pmcid' needs
+ * to have been previously allocated using PMCALLOCATE.
+ */
+
+
+struct pmc_op_pmcrw {
+ uint32_t pm_flags; /* PMC_F_{OLD,NEW}VALUE*/
+ pmc_id_t pm_pmcid; /* pmc id */
+ pmc_value_t pm_value; /* new&returned value */
+};
+
+
+/*
+ * OP GETPMCINFO
+ *
+ * retrieve PMC state for a named CPU. The caller is expected to
+ * allocate 'npmc' * 'struct pmc_info' bytes of space for the return
+ * values.
+ */
+
+struct pmc_info {
+ char pm_name[PMC_NAME_MAX]; /* pmc name */
+ enum pmc_class pm_class; /* enum pmc_class */
+ int pm_enabled; /* whether enabled */
+ enum pmc_disp pm_rowdisp; /* FREE, THREAD or STANDLONE */
+ pid_t pm_ownerpid; /* owner, or -1 */
+ enum pmc_mode pm_mode; /* current mode [enum pmc_mode] */
+ enum pmc_event pm_event; /* current event */
+ uint32_t pm_flags; /* current flags */
+ pmc_value_t pm_reloadcount; /* sampling counters only */
+};
+
+struct pmc_op_getpmcinfo {
+ int32_t pm_cpu; /* 0 <= cpu < mp_maxid */
+ struct pmc_info pm_pmcs[]; /* space for 'npmc' structures */
+};
+
+
+/*
+ * OP GETCPUINFO
+ *
+ * Retrieve system CPU information.
+ */
+
+struct pmc_classinfo {
+ enum pmc_class pm_class; /* class id */
+ uint32_t pm_caps; /* counter capabilities */
+ uint32_t pm_width; /* width of the PMC */
+ uint32_t pm_num; /* number of PMCs in class */
+};
+
+struct pmc_op_getcpuinfo {
+ enum pmc_cputype pm_cputype; /* what kind of CPU */
+ uint32_t pm_ncpu; /* max CPU number */
+ uint32_t pm_npmc; /* #PMCs per CPU */
+ uint32_t pm_nclass; /* #classes of PMCs */
+ struct pmc_classinfo pm_classes[PMC_CLASS_MAX];
+};
+
+/*
+ * OP CONFIGURELOG
+ *
+ * Configure a log file for writing system-wide statistics to.
+ */
+
+struct pmc_op_configurelog {
+ int pm_flags;
+ int pm_logfd; /* logfile fd (or -1) */
+};
+
+/*
+ * OP GETDRIVERSTATS
+ *
+ * Retrieve pmc(4) driver-wide statistics.
+ */
+
+struct pmc_op_getdriverstats {
+ int pm_intr_ignored; /* #interrupts ignored */
+ int pm_intr_processed; /* #interrupts processed */
+ int pm_intr_bufferfull; /* #interrupts with ENOSPC */
+ int pm_syscalls; /* #syscalls */
+ int pm_syscall_errors; /* #syscalls with errors */
+ int pm_buffer_requests; /* #buffer requests */
+ int pm_buffer_requests_failed; /* #failed buffer requests */
+ int pm_log_sweeps; /* #sample buffer processing passes */
+};
+
+/*
+ * OP RELEASE / OP START / OP STOP
+ *
+ * Simple operations on a PMC id.
+ */
+
+struct pmc_op_simple {
+ pmc_id_t pm_pmcid;
+};
+
+/*
+ * OP WRITELOG
+ *
+ * Flush the current log buffer and write 4 bytes of user data to it.
+ */
+
+struct pmc_op_writelog {
+ uint32_t pm_userdata;
+};
+
+/*
+ * OP GETMSR
+ *
+ * Retrieve the machine specific address assoicated with the allocated
+ * PMC. This number can be used subsequently with a read-performance-counter
+ * instruction.
+ */
+
+struct pmc_op_getmsr {
+ uint32_t pm_msr; /* machine specific address */
+ pmc_id_t pm_pmcid; /* allocated pmc id */
+};
+
+#ifdef _KERNEL
+
+#include <sys/malloc.h>
+#include <sys/sysctl.h>
+
+#include <machine/frame.h>
+
+#define PMC_HASH_SIZE 16
+#define PMC_MTXPOOL_SIZE 32
+#define PMC_LOG_BUFFER_SIZE 4
+#define PMC_NLOGBUFFERS 16
+#define PMC_NSAMPLES 32
+#define PMC_CALLCHAIN_DEPTH 8
+
+#define PMC_SYSCTL_NAME_PREFIX "kern." PMC_MODULE_NAME "."
+
+/*
+ * Locking keys
+ *
+ * (b) - pmc_bufferlist_mtx (spin lock)
+ * (k) - pmc_kthread_mtx (sleep lock)
+ * (o) - po->po_mtx (spin lock)
+ */
+
+/*
+ * PMC commands
+ */
+
+struct pmc_syscall_args {
+ uint32_t pmop_code; /* one of PMC_OP_* */
+ void *pmop_data; /* syscall parameter */
+};
+
+/*
+ * Interface to processor specific s1tuff
+ */
+
+/*
+ * struct pmc_descr
+ *
+ * Machine independent (i.e., the common parts) of a human readable
+ * PMC description.
+ */
+
+struct pmc_descr {
+ char pd_name[PMC_NAME_MAX]; /* name */
+ uint32_t pd_caps; /* capabilities */
+ enum pmc_class pd_class; /* class of the PMC */
+ uint32_t pd_width; /* width in bits */
+};
+
+/*
+ * struct pmc_target
+ *
+ * This structure records all the target processes associated with a
+ * PMC.
+ */
+
+struct pmc_target {
+ LIST_ENTRY(pmc_target) pt_next;
+ struct pmc_process *pt_process; /* target descriptor */
+};
+
+/*
+ * struct pmc
+ *
+ * Describes each allocated PMC.
+ *
+ * Each PMC has precisely one owner, namely the process that allocated
+ * the PMC.
+ *
+ * A PMC may be attached to multiple target processes. The
+ * 'pm_targets' field links all the target processes being monitored
+ * by this PMC.
+ *
+ * The 'pm_savedvalue' field is protected by a mutex.
+ *
+ * On a multi-cpu machine, multiple target threads associated with a
+ * process-virtual PMC could be concurrently executing on different
+ * CPUs. The 'pm_runcount' field is atomically incremented every time
+ * the PMC gets scheduled on a CPU and atomically decremented when it
+ * get descheduled. Deletion of a PMC is only permitted when this
+ * field is '0'.
+ *
+ */
+
+struct pmc {
+ LIST_HEAD(,pmc_target) pm_targets; /* list of target processes */
+ LIST_ENTRY(pmc) pm_next; /* owner's list */
+
+ /*
+ * System-wide PMCs are allocated on a CPU and are not moved
+ * around. For system-wide PMCs we record the CPU the PMC was
+ * allocated on in the 'CPU' field of the pmc ID.
+ *
+ * Virtual PMCs run on whichever CPU is currently executing
+ * their targets' threads. For these PMCs we need to save
+ * their current PMC counter values when they are taken off
+ * CPU.
+ */
+
+ union {
+ pmc_value_t pm_savedvalue; /* Virtual PMCS */
+ } pm_gv;
+
+ /*
+ * For sampling mode PMCs, we keep track of the PMC's "reload
+ * count", which is the counter value to be loaded in when
+ * arming the PMC for the next counting session. For counting
+ * modes on PMCs that are read-only (e.g., the x86 TSC), we
+ * keep track of the initial value at the start of
+ * counting-mode operation.
+ */
+
+ union {
+ pmc_value_t pm_reloadcount; /* sampling PMC modes */
+ pmc_value_t pm_initial; /* counting PMC modes */
+ } pm_sc;
+
+ uint32_t pm_stalled; /* marks stalled sampling PMCs */
+ uint32_t pm_caps; /* PMC capabilities */
+ enum pmc_event pm_event; /* event being measured */
+ uint32_t pm_flags; /* additional flags PMC_F_... */
+ struct pmc_owner *pm_owner; /* owner thread state */
+ uint32_t pm_runcount; /* #cpus currently on */
+ enum pmc_state pm_state; /* current PMC state */
+
+ /*
+ * The PMC ID field encodes the row-index for the PMC, its
+ * mode, class and the CPU# associated with the PMC.
+ */
+
+ pmc_id_t pm_id; /* allocated PMC id */
+
+ /* md extensions */
+ union pmc_md_pmc pm_md;
+};
+
+/*
+ * Accessor macros for 'struct pmc'
+ */
+
+#define PMC_TO_MODE(P) PMC_ID_TO_MODE((P)->pm_id)
+#define PMC_TO_CLASS(P) PMC_ID_TO_CLASS((P)->pm_id)
+#define PMC_TO_ROWINDEX(P) PMC_ID_TO_ROWINDEX((P)->pm_id)
+#define PMC_TO_CPU(P) PMC_ID_TO_CPU((P)->pm_id)
+
+
+/*
+ * struct pmc_process
+ *
+ * Record a 'target' process being profiled.
+ *
+ * The target process being profiled could be different from the owner
+ * process which allocated the PMCs. Each target process descriptor
+ * is associated with NHWPMC 'struct pmc *' pointers. Each PMC at a
+ * given hardware row-index 'n' will use slot 'n' of the 'pp_pmcs[]'
+ * array. The size of this structure is thus PMC architecture
+ * dependent.
+ *
+ */
+
+struct pmc_targetstate {
+ struct pmc *pp_pmc; /* target PMC */
+ pmc_value_t pp_pmcval; /* per-process value */
+};
+
+struct pmc_process {
+ LIST_ENTRY(pmc_process) pp_next; /* hash chain */
+ int pp_refcnt; /* reference count */
+ uint32_t pp_flags; /* flags PMC_PP_* */
+ struct proc *pp_proc; /* target thread */
+ struct pmc_targetstate pp_pmcs[]; /* NHWPMCs */
+};
+
+#define PMC_PP_ENABLE_MSR_ACCESS 0x00000001
+
+/*
+ * struct pmc_owner
+ *
+ * We associate a PMC with an 'owner' process.
+ *
+ * A process can be associated with 0..NCPUS*NHWPMC PMCs during its
+ * lifetime, where NCPUS is the numbers of CPUS in the system and
+ * NHWPMC is the number of hardware PMCs per CPU. These are
+ * maintained in the list headed by the 'po_pmcs' to save on space.
+ *
+ */
+
+struct pmc_owner {
+ LIST_ENTRY(pmc_owner) po_next; /* hash chain */
+ LIST_ENTRY(pmc_owner) po_ssnext; /* list of SS PMC owners */
+ LIST_HEAD(, pmc) po_pmcs; /* owned PMC list */
+ TAILQ_HEAD(, pmclog_buffer) po_logbuffers; /* (o) logbuffer list */
+ struct mtx po_mtx; /* spin lock for (o) */
+ struct proc *po_owner; /* owner proc */
+ uint32_t po_flags; /* (k) flags PMC_PO_* */
+ struct proc *po_kthread; /* (k) helper kthread */
+ struct pmclog_buffer *po_curbuf; /* current log buffer */
+ struct file *po_file; /* file reference */
+ int po_error; /* recorded error */
+ int po_sscount; /* # SS PMCs owned */
+};
+
+#define PMC_PO_OWNS_LOGFILE 0x00000001 /* has a log file */
+#define PMC_PO_IN_FLUSH 0x00000010 /* in the middle of a flush */
+#define PMC_PO_INITIAL_MAPPINGS_DONE 0x00000020
+
+/*
+ * struct pmc_hw -- describe the state of the PMC hardware
+ *
+ * When in use, a HW PMC is associated with one allocated 'struct pmc'
+ * pointed to by field 'phw_pmc'. When inactive, this field is NULL.
+ *
+ * On an SMP box, one or more HW PMC's in process virtual mode with
+ * the same 'phw_pmc' could be executing on different CPUs. In order
+ * to handle this case correctly, we need to ensure that only
+ * incremental counts get added to the saved value in the associated
+ * 'struct pmc'. The 'phw_save' field is used to keep the saved PMC
+ * value at the time the hardware is started during this context
+ * switch (i.e., the difference between the new (hardware) count and
+ * the saved count is atomically added to the count field in 'struct
+ * pmc' at context switch time).
+ *
+ */
+
+struct pmc_hw {
+ uint32_t phw_state; /* see PHW_* macros below */
+ struct pmc *phw_pmc; /* current thread PMC */
+};
+
+#define PMC_PHW_RI_MASK 0x000000FF
+#define PMC_PHW_CPU_SHIFT 8
+#define PMC_PHW_CPU_MASK 0x0000FF00
+#define PMC_PHW_FLAGS_SHIFT 16
+#define PMC_PHW_FLAGS_MASK 0xFFFF0000
+
+#define PMC_PHW_INDEX_TO_STATE(ri) ((ri) & PMC_PHW_RI_MASK)
+#define PMC_PHW_STATE_TO_INDEX(state) ((state) & PMC_PHW_RI_MASK)
+#define PMC_PHW_CPU_TO_STATE(cpu) (((cpu) << PMC_PHW_CPU_SHIFT) & \
+ PMC_PHW_CPU_MASK)
+#define PMC_PHW_STATE_TO_CPU(state) (((state) & PMC_PHW_CPU_MASK) >> \
+ PMC_PHW_CPU_SHIFT)
+#define PMC_PHW_FLAGS_TO_STATE(flags) (((flags) << PMC_PHW_FLAGS_SHIFT) & \
+ PMC_PHW_FLAGS_MASK)
+#define PMC_PHW_STATE_TO_FLAGS(state) (((state) & PMC_PHW_FLAGS_MASK) >> \
+ PMC_PHW_FLAGS_SHIFT)
+#define PMC_PHW_FLAG_IS_ENABLED (PMC_PHW_FLAGS_TO_STATE(0x01))
+#define PMC_PHW_FLAG_IS_SHAREABLE (PMC_PHW_FLAGS_TO_STATE(0x02))
+
+/*
+ * struct pmc_sample
+ *
+ * Space for N (tunable) PC samples and associated control data.
+ */
+
+struct pmc_sample {
+ uint16_t ps_nsamples; /* callchain depth */
+ uint8_t ps_cpu; /* cpu number */
+ uint8_t ps_flags; /* other flags */
+ pid_t ps_pid; /* process PID or -1 */
+ struct thread *ps_td; /* which thread */
+ struct pmc *ps_pmc; /* interrupting PMC */
+ uintptr_t *ps_pc; /* (const) callchain start */
+};
+
+#define PMC_SAMPLE_FREE ((uint16_t) 0)
+#define PMC_SAMPLE_INUSE ((uint16_t) 0xFFFF)
+
+struct pmc_samplebuffer {
+ struct pmc_sample * volatile ps_read; /* read pointer */
+ struct pmc_sample * volatile ps_write; /* write pointer */
+ uintptr_t *ps_callchains; /* all saved call chains */
+ struct pmc_sample *ps_fence; /* one beyond ps_samples[] */
+ struct pmc_sample ps_samples[]; /* array of sample entries */
+};
+
+
+/*
+ * struct pmc_cpustate
+ *
+ * A CPU is modelled as a collection of HW PMCs with space for additional
+ * flags.
+ */
+
+struct pmc_cpu {
+ uint32_t pc_state; /* physical cpu number + flags */
+ struct pmc_samplebuffer *pc_sb; /* space for samples */
+ struct pmc_hw *pc_hwpmcs[]; /* 'npmc' pointers */
+};
+
+#define PMC_PCPU_CPU_MASK 0x000000FF
+#define PMC_PCPU_FLAGS_MASK 0xFFFFFF00
+#define PMC_PCPU_FLAGS_SHIFT 8
+#define PMC_PCPU_STATE_TO_CPU(S) ((S) & PMC_PCPU_CPU_MASK)
+#define PMC_PCPU_STATE_TO_FLAGS(S) (((S) & PMC_PCPU_FLAGS_MASK) >> PMC_PCPU_FLAGS_SHIFT)
+#define PMC_PCPU_FLAGS_TO_STATE(F) (((F) << PMC_PCPU_FLAGS_SHIFT) & PMC_PCPU_FLAGS_MASK)
+#define PMC_PCPU_CPU_TO_STATE(C) ((C) & PMC_PCPU_CPU_MASK)
+#define PMC_PCPU_FLAG_HTT (PMC_PCPU_FLAGS_TO_STATE(0x1))
+
+/*
+ * struct pmc_binding
+ *
+ * CPU binding information.
+ */
+
+struct pmc_binding {
+ int pb_bound; /* is bound? */
+ int pb_cpu; /* if so, to which CPU */
+};
+
+
+struct pmc_mdep;
+
+/*
+ * struct pmc_classdep
+ *
+ * PMC class-dependent operations.
+ */
+struct pmc_classdep {
+ uint32_t pcd_caps; /* class capabilities */
+ enum pmc_class pcd_class; /* class id */
+ int pcd_num; /* number of PMCs */
+ int pcd_ri; /* row index of the first PMC in class */
+ int pcd_width; /* width of the PMC */
+
+ /* configuring/reading/writing the hardware PMCs */
+ int (*pcd_config_pmc)(int _cpu, int _ri, struct pmc *_pm);
+ int (*pcd_get_config)(int _cpu, int _ri, struct pmc **_ppm);
+ int (*pcd_read_pmc)(int _cpu, int _ri, pmc_value_t *_value);
+ int (*pcd_write_pmc)(int _cpu, int _ri, pmc_value_t _value);
+
+ /* pmc allocation/release */
+ int (*pcd_allocate_pmc)(int _cpu, int _ri, struct pmc *_t,
+ const struct pmc_op_pmcallocate *_a);
+ int (*pcd_release_pmc)(int _cpu, int _ri, struct pmc *_pm);
+
+ /* starting and stopping PMCs */
+ int (*pcd_start_pmc)(int _cpu, int _ri);
+ int (*pcd_stop_pmc)(int _cpu, int _ri);
+
+ /* description */
+ int (*pcd_describe)(int _cpu, int _ri, struct pmc_info *_pi,
+ struct pmc **_ppmc);
+
+ /* class-dependent initialization & finalization */
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
More information about the svn-src-user
mailing list