Merge pull request #1882 from YanhuiMa/tsc

tsc: add tsc test script for rhel8

generic/deps/tsc_rhel8/Makefile

@@ -0,0 +1,20 @@
+CC=		cc
+CFLAGS=		-O
+LIBS=		-lpthread
+
+PROGS=		checktsc
+
+SRCS=		checktsc.c
+OBJS=		${SRCS:.c=.o}
+
+
+all:		$(PROGS)
+
+checktsc:	$(OBJS)
+		$(CC) $(LDFLAGS) -o checktsc $(OBJS) $(LIBS)
+
+clean:
+		-rm -f $(OBJS)
+
+clobber:	clean
+		-rm -f $(PROGS)

generic/deps/tsc_rhel8/README

@@ -0,0 +1,18 @@
+checktsc is a user space program that checks TSC synchronization
+between pairs of CPUs on an SMP system using a technique borrowed
+from the Linux 2.6.18 kernel.
+
+The test passes if all TSCs are within +/- "threshold" clock cycles
+of each other. The default value of "threshold" is 500 clock cycles
+and can be changed using the --threshold option.
+
+Default behaviour is to check all of the CPUs on a system and to
+report the observed difference in TSC values between each pair of CPUs.
+The --cpus option can be used to specify a subset of the CPUs to test.
+
+When run with the --silent option the test produces no output (other
+than for catastrophic errors) and success or failure is indicated by
+a 0 or 1 exit status from the program.
+
+Author: md@google.com
+License: GPL