use dprintf(1,..) instead of buffered stderr

[libc-test] / common / b.c

diff --git a/common/b.c b/common/b.c
index 91f137e..07b299c 100644 (file)
--- a/common/b.c
+++ b/common/b.c
@@ -16,7 +16,7 @@
 static int verbose = 1;
 
 void error__(const char *n, int l, const char *s, ...) {
-       fprintf(stderr, "use error in tests only\n");
+       dprintf(1, "use error in tests only\n");
 }
 
 static int N;
@@ -32,7 +32,7 @@ static unsigned long long tic() {
        struct timespec ts;
 
        if (clock_gettime(CLOCK_REALTIME, &ts) < 0) {
-               fprintf(stderr, "bench: clock_gettime failed: %s\n", strerror(errno));
+               dprintf(1, "bench: clock_gettime failed: %s\n", strerror(errno));
                return 0;
        }
        return ts.tv_sec*SEC + ts.tv_nsec;
@@ -98,17 +98,17 @@ void vmstats() {
                }
        }
        if (f) fclose(f);
-       fprintf(stderr, " %7zu virt %7zu res %7zu dirty", vm_size, vm_rss, vm_priv_dirty);
+       dprintf(1, " %7zu virt %7zu res %7zu dirty", vm_size, vm_rss, vm_priv_dirty);
 }
 
 void stats() {
-       if (dt/N > 100)
-               fprintf(stderr, "%10d N %10llu ns/op   ", N, dt/N);
+       if (dt/N >= 100)
+               dprintf(1, "%10d N %10llu ns/op   ", N, dt/N);
        else
-               fprintf(stderr, "%10d N %13.2f ns/op", N, (double)dt/N);
+               dprintf(1, "%10d N %13.2f ns/op", N, (double)dt/N);
        if (verbose)
                vmstats();
-       fputc('\n', stderr);
+       dprintf(1, "\n");
 }
 
 static void run(const char *name, void (*f)(int)) {
@@ -116,23 +116,23 @@ static void run(const char *name, void (*f)(int)) {
        if (p) {
                int s;
                if (p<0 || wait(&s)<0 || !WIFEXITED(s) || WEXITSTATUS(s))
-                       fprintf(stderr, "benchmark %s failed\n", name);
+                       dprintf(1, "benchmark %s failed\n", name);
                return;
        }
-       fprintf(stderr, "%-32s", name);
+       dprintf(1, "%-32s", name);
        for (N=1; ; N=nextN()) {
                // TODO: fork at each iteration and pass N,dt..?
                reset_timer();
                start_timer();
                f(N);
                stop_timer();
-//             fprintf(stderr, "%10d%12llu next: %d\n", N, dt, nextN());
+//             dprintf(1, "%10d%12llu next: %d\n", N, dt, nextN());
                if (dt >= SEC/2 || N >= MAXN) {
                        stats();
                        exit(0);
                }
                if (N <= 0) {
-                       fprintf(stderr, "bench: fatal: N <= 0\n");
+                       dprintf(1, "bench: fatal: N <= 0\n");
                        exit(1);
                }
        }