Date: Fri, 5 Sep 2003 01:00:03 -0700 (PDT) From: Marcel Moolenaar <marcel@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 37557 for review Message-ID: <200309050800.h85803l1002012@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=37557 Change 37557 by marcel@marcel_nfs on 2003/09/05 00:59:42 Send a pattern that allows us to detect lost data or (god forbid) spontaneous data. Affected files ... .. //depot/projects/uart/dev/uart/uarttest.c#3 edit Differences ... ==== //depot/projects/uart/dev/uart/uarttest.c#3 (text+ko) ==== @@ -48,7 +48,7 @@ int fd, how; -char buffer[16384*4]; +u_char buffer[16384*4]; static int getsig(const char *dev, size_t count, int oldsig) @@ -85,6 +85,9 @@ ssize_t count, wc; int sig; + for (count = 0; count < sizeof(buffer); count++) + buffer[count] = count; + count = 0; errno = 0; sig = 0; @@ -103,9 +106,10 @@ dce(void) { ssize_t count, rc; - int sig; + int delta, diff, sig; count = 0; + delta = 0; errno = 0; sig = 0; while (count < sizeof(buffer)) { @@ -113,11 +117,20 @@ rc = MIN(16, sizeof(buffer) - count); rc = read(fd, buffer + count, rc); if (rc > 0) { - count += rc; + while (rc--) { + diff = buffer[count] - (u_char)count - delta; + if (diff) { + printf("ERR: %u (%d): ", count, delta); + printf("lost %d bytes\n", diff); + delta += diff; + } + count++; + } errno = 0; } else { - printf("sleeping after %u bytes...\n", count); - sleep(1); + printf("sleeping after %u (%d) bytes...\n", count, + delta); + sleep(2); } } @@ -198,8 +211,8 @@ break; } + sleep(2); tcsetattr(fd, TCSADRAIN, &t0); - sleep(1); close(fd); return (EX_OK); }
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