[undi] Profile all PXE API calls
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
parent
206bd7bb64
commit
50689a8974
|
|
@ -20,6 +20,7 @@
|
|||
FILE_LICENCE ( GPL2_OR_LATER );
|
||||
|
||||
#include <ipxe/dhcp.h>
|
||||
#include <ipxe/profile.h>
|
||||
#include <pxeparent.h>
|
||||
#include <pxe_api.h>
|
||||
#include <pxe_types.h>
|
||||
|
|
@ -37,6 +38,59 @@ FILE_LICENCE ( GPL2_OR_LATER );
|
|||
"External PXE API error" )
|
||||
#define EPXECALL( status ) EPLATFORM ( EINFO_EPXECALL, status )
|
||||
|
||||
/** A parent PXE API call profiler */
|
||||
struct pxeparent_profiler {
|
||||
/** Total time spent performing REAL_CALL() */
|
||||
struct profiler total;
|
||||
/** Time spent transitioning to real mode */
|
||||
struct profiler p2r;
|
||||
/** Time spent in external code */
|
||||
struct profiler ext;
|
||||
/** Time spent transitioning back to protected mode */
|
||||
struct profiler r2p;
|
||||
};
|
||||
|
||||
/** PXENV_UNDI_TRANSMIT profiler */
|
||||
static struct pxeparent_profiler pxeparent_tx_profiler __profiler = {
|
||||
{ .name = "pxeparent.tx" },
|
||||
{ .name = "pxeparent.tx_p2r" },
|
||||
{ .name = "pxeparent.tx_ext" },
|
||||
{ .name = "pxeparent.tx_r2p" },
|
||||
};
|
||||
|
||||
/** PXENV_UNDI_ISR profiler
|
||||
*
|
||||
* Note that this profiler will not see calls to
|
||||
* PXENV_UNDI_ISR_IN_START, which are handled by the UNDI ISR and do
|
||||
* not go via pxeparent_call().
|
||||
*/
|
||||
static struct pxeparent_profiler pxeparent_isr_profiler __profiler = {
|
||||
{ .name = "pxeparent.isr" },
|
||||
{ .name = "pxeparent.isr_p2r" },
|
||||
{ .name = "pxeparent.isr_ext" },
|
||||
{ .name = "pxeparent.isr_r2p" },
|
||||
};
|
||||
|
||||
/** PXE unknown API call profiler
|
||||
*
|
||||
* This profiler can be used to measure the overhead of a dummy PXE
|
||||
* API call.
|
||||
*/
|
||||
static struct pxeparent_profiler pxeparent_unknown_profiler __profiler = {
|
||||
{ .name = "pxeparent.unknown" },
|
||||
{ .name = "pxeparent.unknown_p2r" },
|
||||
{ .name = "pxeparent.unknown_ext" },
|
||||
{ .name = "pxeparent.unknown_r2p" },
|
||||
};
|
||||
|
||||
/** Miscellaneous PXE API call profiler */
|
||||
static struct pxeparent_profiler pxeparent_misc_profiler __profiler = {
|
||||
{ .name = "pxeparent.misc" },
|
||||
{ .name = "pxeparent.misc_p2r" },
|
||||
{ .name = "pxeparent.misc_ext" },
|
||||
{ .name = "pxeparent.misc_r2p" },
|
||||
};
|
||||
|
||||
/**
|
||||
* Name PXE API call
|
||||
*
|
||||
|
|
@ -103,11 +157,32 @@ pxeparent_function_name ( unsigned int function ) {
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Determine applicable profiler pair (for debugging)
|
||||
*
|
||||
* @v function API call number
|
||||
* @ret profiler Profiler
|
||||
*/
|
||||
static struct pxeparent_profiler * pxeparent_profiler ( unsigned int function ){
|
||||
|
||||
/* Determine applicable profiler */
|
||||
switch ( function ) {
|
||||
case PXENV_UNDI_TRANSMIT:
|
||||
return &pxeparent_tx_profiler;
|
||||
case PXENV_UNDI_ISR:
|
||||
return &pxeparent_isr_profiler;
|
||||
case PXENV_UNKNOWN:
|
||||
return &pxeparent_unknown_profiler;
|
||||
default:
|
||||
return &pxeparent_misc_profiler;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* PXE parent parameter block
|
||||
*
|
||||
* Used as the paramter block for all parent PXE API calls. Resides in base
|
||||
* memory.
|
||||
* Used as the parameter block for all parent PXE API calls. Resides
|
||||
* in base memory.
|
||||
*/
|
||||
static union u_PXENV_ANY __bss16 ( pxeparent_params );
|
||||
#define pxeparent_params __use_data16 ( pxeparent_params )
|
||||
|
|
@ -131,8 +206,11 @@ SEGOFF16_t __bss16 ( pxeparent_entry_point );
|
|||
*/
|
||||
int pxeparent_call ( SEGOFF16_t entry, unsigned int function,
|
||||
void *params, size_t params_len ) {
|
||||
struct pxeparent_profiler *profiler = pxeparent_profiler ( function );
|
||||
PXENV_EXIT_t exit;
|
||||
int discard_b, discard_D;
|
||||
unsigned long started;
|
||||
unsigned long stopped;
|
||||
int discard_D;
|
||||
int rc;
|
||||
|
||||
/* Copy parameter block and entry point */
|
||||
|
|
@ -143,18 +221,31 @@ int pxeparent_call ( SEGOFF16_t entry, unsigned int function,
|
|||
/* Call real-mode entry point. This calling convention will
|
||||
* work with both the !PXE and the PXENV+ entry points.
|
||||
*/
|
||||
profile_start ( &profiler->total );
|
||||
__asm__ __volatile__ ( REAL_CODE ( "pushl %%ebp\n\t" /* gcc bug */
|
||||
"rdtsc\n\t"
|
||||
"pushl %%eax\n\t"
|
||||
"pushw %%es\n\t"
|
||||
"pushw %%di\n\t"
|
||||
"pushw %%bx\n\t"
|
||||
"lcall *pxeparent_entry_point\n\t"
|
||||
"movw %%ax, %%bx\n\t"
|
||||
"rdtsc\n\t"
|
||||
"addw $6, %%sp\n\t"
|
||||
"popl %%edx\n\t"
|
||||
"popl %%ebp\n\t" /* gcc bug */ )
|
||||
: "=a" ( exit ), "=b" ( discard_b ),
|
||||
"=D" ( discard_D )
|
||||
: "=a" ( stopped ), "=d" ( started ),
|
||||
"=b" ( exit ), "=D" ( discard_D )
|
||||
: "b" ( function ),
|
||||
"D" ( __from_data16 ( &pxeparent_params ) )
|
||||
: "ecx", "edx", "esi" );
|
||||
: "ecx", "esi" );
|
||||
profile_stop ( &profiler->total );
|
||||
profile_start_at ( &profiler->p2r, profiler->total.started );
|
||||
profile_stop_at ( &profiler->p2r, started );
|
||||
profile_start_at ( &profiler->ext, started );
|
||||
profile_stop_at ( &profiler->ext, stopped );
|
||||
profile_start_at ( &profiler->r2p, stopped );
|
||||
profile_stop_at ( &profiler->r2p, profiler->total.stopped );
|
||||
|
||||
/* Determine return status code based on PXENV_EXIT and
|
||||
* PXENV_STATUS
|
||||
|
|
|
|||
Reference in New Issue