Mercurial > ecos

comparison packages/kernel/current/tests/kcache2.c @ 199:920b9b754b53

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merge from eCos master repository on 2001-12-15-12:00:33-GMT
author jlarmour
date Sat, 15 Dec 2001 13:42:19 +0000
parents 67850532eebb
children e0c0827131d1
comparison
equal deleted inserted replaced
198:ea3f0bd33a73 199:920b9b754b53
560 // ------------------------------------------------------------------------- 560 // -------------------------------------------------------------------------
561 // Test of instruction cache locking. 561 // Test of instruction cache locking.
562 // o Time difference between repeatedly executing a bunch of instructions 562 // o Time difference between repeatedly executing a bunch of instructions
563 // with and without locking. 563 // with and without locking.
564 #ifdef HAL_ICACHE_LOCK 564 #ifdef HAL_ICACHE_LOCK
565 static void iloop(unsigned long* start, unsigned long* end) 565 static void iloop(unsigned long* start, unsigned long* end, int dummy)
566 { 566 {
567 // dummy is just used to fool the compiler to not move the labels
568 // around. All callers should call with dummy=0;
569
567 register char c; 570 register char c;
568 register CYG_INTERRUPT_STATE oldints; 571 register CYG_INTERRUPT_STATE oldints;
572
573 if (1 == dummy) goto label_end;
569 574
570 label_start: 575 label_start:
571 // Invalidating shouldn't affect locked lines. 576 // Invalidating shouldn't affect locked lines.
572 HAL_DISABLE_INTERRUPTS(oldints); 577 HAL_DISABLE_INTERRUPTS(oldints);
573 HAL_ICACHE_DISABLE(); 578 HAL_ICACHE_DISABLE();
642 647
643 label_end: 648 label_end:
644 649
645 *start = (unsigned long) &&label_start; 650 *start = (unsigned long) &&label_start;
646 *end = (unsigned long) &&label_end; 651 *end = (unsigned long) &&label_end;
652
653 if (1 == dummy) goto label_start;
647 } 654 }
648 655
649 static void time_ilock(void) 656 static void time_ilock(void)
650 { 657 {
651 register cyg_ucount32 k; 658 register cyg_ucount32 k;
659 if (cyg_test_is_simulator) 666 if (cyg_test_is_simulator)
660 time_ilock_loops = 10; 667 time_ilock_loops = 10;
661 668
662 count0 = cyg_current_time(); 669 count0 = cyg_current_time();
663 for (k = 0; k < time_ilock_loops; k++) { 670 for (k = 0; k < time_ilock_loops; k++) {
664 iloop(&start, &end); 671 iloop(&start, &end, 0);
665 } 672 }
666 count1 = cyg_current_time(); 673 count1 = cyg_current_time();
667 t = count1 - count0; 674 t = count1 - count0;
668 diag_printf("time without lock: %d\n", t); 675 diag_printf("time without lock: %d\n", t);
669 676
670 HAL_ICACHE_LOCK(start, end-start); 677 HAL_ICACHE_LOCK(start, end-start);
671 678
672 count0 = cyg_current_time(); 679 count0 = cyg_current_time();
673 for (k = 0; k < time_ilock_loops; k++) { 680 for (k = 0; k < time_ilock_loops; k++) {
674 iloop(&start, &end); 681 iloop(&start, &end, 0);
675 } 682 }
676 count1 = cyg_current_time(); 683 count1 = cyg_current_time();
677 t = count1 - count0; 684 t = count1 - count0;
678 diag_printf("time with lock: %d\n", t); 685 diag_printf("time with lock: %d\n", t);
679 686