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Arrangements for the SIGSEGV perf tester.

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This commit is contained in:
gbeauche 2008-01-20 11:51:08 +00:00
parent 2bdb300da1
commit a4209f5db0
1 changed files with 14 additions and 5 deletions
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19
BasiliskII/src/Unix/video_vosf.h
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@ -217,13 +217,17 @@ static uint32 page_extend(uint32 size)
* Check if VOSF acceleration is profitable on this platform
*/
const int VOSF_PROFITABLE_TRIES = 3; // Make 3 attempts for full screen update
#ifndef VOSF_PROFITABLE_TRIES
#define VOSF_PROFITABLE_TRIES VOSF_PROFITABLE_TRIES_DFL
#endif
const int VOSF_PROFITABLE_TRIES_DFL = 1000; // Make 3 attempts for full screen update
const int VOSF_PROFITABLE_THRESHOLD = 16667/2; // 60 Hz (half of the quantum)
static bool video_vosf_profitable(void)
static bool video_vosf_profitable(uint32 *duration_p = NULL, uint32 *n_page_faults_p = NULL)
{
uint32 duration = 0;
const uint32 n_page_faults = mainBuffer.pageCount * VOSF_PROFITABLE_TRIES;
uint32 n_tries = VOSF_PROFITABLE_TRIES;
const uint32 n_page_faults = mainBuffer.pageCount * n_tries;
#ifdef SHEEPSHAVER
const bool accel = PrefsFindBool("gfxaccel");
@ -231,7 +235,7 @@ static bool video_vosf_profitable(void)
const bool accel = false;
#endif
for (int i = 0; i < VOSF_PROFITABLE_TRIES; i++) {
for (int i = 0; i < n_tries; i++) {
uint64 start = GetTicks_usec();
for (int p = 0; p < mainBuffer.pageCount; p++) {
uint8 *addr = (uint8 *)(mainBuffer.memStart + (p * mainBuffer.pageSize));
@ -249,8 +253,13 @@ static bool video_vosf_profitable(void)
return false;
}
if (duration_p)
*duration_p = duration;
if (n_page_faults_p)
*n_page_faults_p = n_page_faults;
D(bug("Triggered %d page faults in %ld usec (%.1f usec per fault)\n", n_page_faults, duration, double(duration) / double(n_page_faults)));
return ((duration / VOSF_PROFITABLE_TRIES) < (VOSF_PROFITABLE_THRESHOLD * (frame_skip ? frame_skip : 1)));
return ((duration / n_tries) < (VOSF_PROFITABLE_THRESHOLD * (frame_skip ? frame_skip : 1)));
}