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Add userland definitions for parsing callchain records.

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Sponsored by:	FreeBSD Foundation and Google Inc.
This commit is contained in:
Joseph Koshy 2007-12-03 11:11:08 +00:00
parent 0b84422642
commit c438255074
2 changed files with 34 additions and 5 deletions
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12
sys/sys/pmc.h
View File

@ -1,7 +1,11 @@
/*-
* Copyright (c) 2003-2006, Joseph Koshy
* Copyright (c) 2003-2007, 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:
@ -263,7 +267,6 @@ enum pmc_event {
* "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") \
@ -301,12 +304,17 @@ enum pmc_ops {
#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.
*/

27
sys/sys/pmclog.h
View File

@ -1,7 +1,11 @@
/*-
* Copyright (c) 2005-2006, Joseph Koshy
* Copyright (c) 2005-2007, 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:
@ -51,10 +55,12 @@ enum pmclog_type {
* V2 ABI
*
* The MAP_{IN,OUT} event types obsolete the MAPPING_CHANGE
* event type of the older (V1) ABI.
* event type. The CALLCHAIN event type obsoletes the
* PCSAMPLE event type.
*/
PMCLOG_TYPE_MAP_IN,
PMCLOG_TYPE_MAP_OUT
PMCLOG_TYPE_MAP_OUT,
PMCLOG_TYPE_CALLCHAIN
};
/*
@ -90,6 +96,20 @@ enum pmclog_type {
* of 4 byte quantities.
*/
struct pmclog_callchain {
PMCLOG_ENTRY_HEADER
uint32_t pl_pid;
uint32_t pl_pmcid;
uint32_t pl_cpuflags;
/* 8 byte aligned */
uintptr_t pl_pc[PMC_CALLCHAIN_DEPTH_MAX];
} __packed;
#define PMC_CALLCHAIN_CPUFLAGS_TO_CPU(CF) (((CF) >> 16) & 0xFFFF)
#define PMC_CALLCHAIN_CPUFLAGS_TO_USERMODE(CF) ((CF) & PMC_CC_F_USERSPACE)
#define PMC_CALLCHAIN_TO_CPUFLAGS(CPU,FLAGS) \
(((CPU) << 16) | ((FLAGS) & 0xFFFF))
struct pmclog_closelog {
PMCLOG_ENTRY_HEADER
};
@ -185,6 +205,7 @@ struct pmclog_userdata {
} __packed;
union pmclog_entry { /* only used to size scratch areas */
struct pmclog_callchain pl_cc;
struct pmclog_closelog pl_cl;
struct pmclog_dropnotify pl_dn;
struct pmclog_initialize pl_i;