opd_trans.c File Reference

Processing the sample buffer. More...

#include "opd_trans.h"
#include "opd_kernel.h"
#include "opd_sfile.h"
#include "opd_anon.h"
#include "opd_stats.h"
#include "opd_printf.h"
#include "opd_interface.h"
#include <limits.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <errno.h>
Include dependency graph for opd_trans.c:

Functions

void clear_trans_last (struct transient *trans)
 used when we need to clear data that's been freed
void clear_trans_current (struct transient *trans)
 used when we need to clear data that's been freed
uint64_t pop_buffer_value (struct transient *trans)
int enough_remaining (struct transient *trans, size_t size)
void code_spu_profiling (struct transient *trans)
void code_spu_ctx_switch (struct transient *trans)
void code_ibs_fetch_sample (struct transient *trans)
 Handle an IBS fetch sample escape code sequence.
void code_ibs_op_sample (struct transient *trans)
 Handle an IBS op sample escape code sequence.
void opd_process_samples (char const *buffer, size_t count)

Variables

size_t kernel_pointer_size
handler_t handlers [LAST_CODE+1]
void(* special_processor )(struct transient *)

Detailed Description

Processing the sample buffer.

Remarks:
Copyright 2002 OProfile authors
Read the file COPYING
Author:
John Levon
Philippe Elie Modified by Aravind Menon for Xen These modifications are: Copyright (C) 2005 Hewlett-Packard Co.

Modified by Maynard Johnson <maynardj@us.ibm.com> These modifications are: (C) Copyright IBM Corporation 2007


Function Documentation

void clear_trans_current ( struct transient trans  ) 

used when we need to clear data that's been freed

Referenced by code_spu_ctx_switch().

void clear_trans_last ( struct transient trans  ) 

used when we need to clear data that's been freed

void code_ibs_fetch_sample ( struct transient trans  ) 

Handle an IBS fetch sample escape code sequence.

An IBS fetch sample is represented as an escape code sequence. (See the comment for the function code_ibs_op_sample() for the sequence of entries in the event buffer.) When this function is called, the ESCAPE_CODE and IBS_FETCH_CODE have already been removed from the event buffer. Thus, 7 more event buffer entries are needed in order to process a complete IBS fetch sample.

References enough_remaining(), ibs_sample::fetch, ibs_fetch_sample::ibs_fetch_ctl_high, ibs_fetch_sample::ibs_fetch_ctl_low, ibs_fetch_sample::ibs_fetch_lin_addr_high, ibs_fetch_sample::ibs_fetch_lin_addr_low, ibs_fetch_sample::ibs_fetch_phys_addr_high, ibs_fetch_sample::ibs_fetch_phys_addr_low, pop_buffer_value(), ibs_fetch_sample::rip, verbprintf, vext, and vsamples.

void code_ibs_op_sample ( struct transient trans  ) 

Handle an IBS op sample escape code sequence.

An IBS op sample is represented as an escape code sequence:

IBS fetch IBS op --------------- ---------------- ESCAPE_CODE ESCAPE_CODE IBS_FETCH_CODE IBS_OP_CODE Offset Offset IbsFetchLinAd low IbsOpRip low <-- Logical (virtual) RIP IbsFetchLinAd high IbsOpRip high <-- Logical (virtual) RIP IbsFetchCtl low IbsOpData low IbsFetchCtl high IbsOpData high IbsFetchPhysAd low IbsOpData2 low IbsFetchPhysAd high IbsOpData2 high IbsOpData3 low IbsOpData3 high IbsDcLinAd low IbsDcLinAd high IbsDcPhysAd low IbsDcPhysAd high

When this function is called, the ESCAPE_CODE and IBS_OP_CODE have already been removed from the event buffer. Thus, 13 more event buffer entries are needed to process a complete IBS op sample.

The IbsFetchLinAd and IbsOpRip are the linear (virtual) addresses that were generated by the IBS hardware. These addresses are mapped into the offset.

References enough_remaining(), ibs_op_sample::ibs_op_data1_high, ibs_op_sample::ibs_op_data1_low, ibs_op_sample::ibs_op_data2_high, ibs_op_sample::ibs_op_data2_low, ibs_op_sample::ibs_op_data3_high, ibs_op_sample::ibs_op_data3_low, ibs_op_sample::ibs_op_ldst_linaddr_high, ibs_op_sample::ibs_op_ldst_linaddr_low, ibs_op_sample::ibs_op_lin_addr_high, ibs_op_sample::ibs_op_lin_addr_low, ibs_op_sample::ibs_op_phys_addr_high, ibs_op_sample::ibs_op_phys_addr_low, ibs_sample::op, pop_buffer_value(), ibs_op_sample::rip, verbprintf, vext, and vsamples.

void code_spu_ctx_switch ( struct transient trans  ) 
void code_spu_profiling ( struct transient trans  ) 
int enough_remaining ( struct transient trans,
size_t  size 
)
void opd_process_samples ( char const *  buffer,
size_t  count 
)
uint64_t pop_buffer_value ( struct transient trans  ) 

Variable Documentation

handler_t handlers[LAST_CODE+1]
Initial value:
 {
        &code_unknown,
        &code_ctx_switch,
        &code_cpu_switch,
        &code_cookie_switch,
        &code_kernel_enter,
        &code_user_enter,
        &code_module_loaded,
        
        &code_unknown,
        &code_trace_begin,
        &code_unknown,
        &code_xen_enter,




        &code_unknown,
        &code_unknown,

        &code_ibs_fetch_sample,
        &code_ibs_op_sample,
}

Referenced by opd_ext_find_counter_event(), opd_ext_print_stats(), opd_ext_sfile_close(), opd_ext_sfile_create(), opd_ext_sfile_dup(), opd_ext_sfile_get(), and opd_ext_sfile_sync().

void(* special_processor)(struct transient *)

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