Alexandr Kovalenko <[EMAIL PROTECTED]> writes: > Could you please explain me this? Result is fully reproduceable. Please note, > that the only difference is the output file name. Even resulting files match > bit-to-bit. [...]
Definitely some kind of alignment problem, but it only shows up at some optimization levels and not others. [EMAIL PROTECTED] ~/src/flops% ll f*s lrwxr-xr-x 1 des des 5 Feb 15 21:34 fffffffffffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:06 ffffffffffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:06 fffffffffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:08 ffffffffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:08 fffffffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:08 ffffffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:03 fffffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:03 ffffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 fffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 ffffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 fffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 ffffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 fffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 ffffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 fffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 ffflops@ -> flops lrwxr-xr-x 1 des des 5 Feb 15 21:02 fflops@ -> flops -rwxr-xr-x 1 des des 20875 Feb 15 21:05 flops* lrwxr-xr-x 1 des des 5 Feb 15 20:55 flucking-slow-flops@ -> flops [EMAIL PROTECTED] ~/src/flops% cc -DUNIX -o flops flops.c [EMAIL PROTECTED] ~/src/flops% for f in f*s ; do ./$f |& grep MFLOPS.1. ; done MFLOPS(1) = 386.3844 MFLOPS(1) = 365.9330 MFLOPS(1) = 364.1425 MFLOPS(1) = 366.6225 MFLOPS(1) = 389.3461 MFLOPS(1) = 377.1758 MFLOPS(1) = 354.1909 MFLOPS(1) = 356.5961 MFLOPS(1) = 371.7964 MFLOPS(1) = 366.3965 MFLOPS(1) = 407.1590 MFLOPS(1) = 375.0376 MFLOPS(1) = 353.9504 MFLOPS(1) = 394.1439 MFLOPS(1) = 134.2436 MFLOPS(1) = 148.3984 MFLOPS(1) = 390.5495 MFLOPS(1) = 373.4338 MFLOPS(1) = 341.5228 [EMAIL PROTECTED] ~/src/flops% cc -DUNIX -O0 -o flops flops.c [EMAIL PROTECTED] ~/src/flops% for f in f*s ; do ./$f |& grep MFLOPS.1. ; done MFLOPS(1) = 392.9511 MFLOPS(1) = 361.4795 MFLOPS(1) = 407.0004 MFLOPS(1) = 368.2120 MFLOPS(1) = 355.9699 MFLOPS(1) = 378.2740 MFLOPS(1) = 372.4568 MFLOPS(1) = 339.8898 MFLOPS(1) = 367.3776 MFLOPS(1) = 379.0460 MFLOPS(1) = 363.5696 MFLOPS(1) = 379.5704 MFLOPS(1) = 390.2681 MFLOPS(1) = 382.3747 MFLOPS(1) = 175.9839 MFLOPS(1) = 131.9588 MFLOPS(1) = 379.4554 MFLOPS(1) = 385.6065 MFLOPS(1) = 363.8399 [EMAIL PROTECTED] ~/src/flops% cc -DUNIX -O -o flops flops.c [EMAIL PROTECTED] ~/src/flops% for f in f*s ; do ./$f |& grep MFLOPS.1. ; done MFLOPS(1) = 438.2079 MFLOPS(1) = 445.7388 MFLOPS(1) = 143.9707 MFLOPS(1) = 152.9320 MFLOPS(1) = 420.0060 MFLOPS(1) = 450.3305 MFLOPS(1) = 176.8822 MFLOPS(1) = 177.4155 MFLOPS(1) = 453.1921 MFLOPS(1) = 463.7040 MFLOPS(1) = 431.8273 MFLOPS(1) = 440.2074 MFLOPS(1) = 457.4747 MFLOPS(1) = 430.3638 MFLOPS(1) = 438.6455 MFLOPS(1) = 436.4352 MFLOPS(1) = 403.4691 MFLOPS(1) = 429.3843 MFLOPS(1) = 166.5295 [EMAIL PROTECTED] ~/src/flops% cc -DUNIX -O2 -o flops flops.c [EMAIL PROTECTED] ~/src/flops% for f in f*s ; do ./$f |& grep MFLOPS.1. ; done MFLOPS(1) = 486.4274 MFLOPS(1) = 462.6540 MFLOPS(1) = 448.6820 MFLOPS(1) = 483.4713 MFLOPS(1) = 456.5398 MFLOPS(1) = 456.2924 MFLOPS(1) = 458.9312 MFLOPS(1) = 443.5167 MFLOPS(1) = 527.0580 MFLOPS(1) = 488.1867 MFLOPS(1) = 478.7150 MFLOPS(1) = 456.2584 MFLOPS(1) = 476.7231 MFLOPS(1) = 473.5441 MFLOPS(1) = 480.3434 MFLOPS(1) = 457.3464 MFLOPS(1) = 478.5790 MFLOPS(1) = 473.1698 MFLOPS(1) = 444.4634 [EMAIL PROTECTED] ~/src/flops% cc -DUNIX -O3 -o flops flops.c [EMAIL PROTECTED] ~/src/flops% for f in f*s ; do ./$f |& grep MFLOPS.1. ; done MFLOPS(1) = 485.9121 MFLOPS(1) = 470.1213 MFLOPS(1) = 434.6227 MFLOPS(1) = 438.2213 MFLOPS(1) = 460.9863 MFLOPS(1) = 458.5821 MFLOPS(1) = 472.2775 MFLOPS(1) = 438.6205 MFLOPS(1) = 437.6345 MFLOPS(1) = 468.6643 MFLOPS(1) = 432.0184 MFLOPS(1) = 437.1364 MFLOPS(1) = 469.7258 MFLOPS(1) = 463.0537 MFLOPS(1) = 465.8361 MFLOPS(1) = 500.6559 MFLOPS(1) = 458.3052 MFLOPS(1) = 470.0315 MFLOPS(1) = 441.1284 DES -- Dag-Erling Smørgrav - [EMAIL PROTECTED] _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
