change meaning of $GOMAXPROCS to number of cpus to use,

not number of threads.  can still starve all the other threads,
but only by looping, not by waiting in a system call.

fix darwin syscall.Syscall6 bug.

fix chanclient bug.

delete $GOMAXPROCS from network tests.

add stripped down printf, sys.printhex to runtime.

R=r
DELTA=355  (217 added, 36 deleted, 102 changed)
OCL=20017
CL=20019

1 files changed, 2 insertions, 0 deletions

diff --git a/src/lib/net/fd.go b/src/lib/net/fd.go
index 977df37a49..f9fba2bc0f 100644
--- a/src/lib/net/fd.go
+++ b/src/lib/net/fd.go
@@ -248,9 +248,11 @@ func (fd *FD) Write(p *[]byte) (n int, err *os.Error) {
 	if fd == nil || fd.osfd == nil {
 		return -1, os.EINVAL
 	}
+	// TODO(rsc): Lock fd while writing to avoid interlacing writes.
 	err = nil;
 	nn := 0;
 	for nn < len(p) && err == nil {
+		// TODO(rsc): If os.FD.Write loops, have to use syscall instead.
 		n, err = fd.osfd.Write(p[nn:len(p)]);
 		for err == os.EAGAIN {
 			pollserver.WaitWrite(fd);