1 files changed, 0 insertions, 97 deletions
diff --git a/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c b/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c
deleted file mode 100644
index f7499d1c0415..000000000000
--- a/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
- *
- * Tests if the control register is updated correctly
- * at context switches
- *
- * Warning: this test will cause a very high load for a few seconds
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
-#include <inttypes.h>
-#include <wait.h>
-
-
-#include <sys/prctl.h>
-#include <linux/prctl.h>
-
-/* Get/set the process' ability to use the timestamp counter instruction */
-#ifndef PR_GET_TSC
-#define PR_GET_TSC 25
-#define PR_SET_TSC 26
-# define PR_TSC_ENABLE		1   /* allow the use of the timestamp counter */
-# define PR_TSC_SIGSEGV		2   /* throw a SIGSEGV instead of reading the TSC */
-#endif
-
-static uint64_t rdtsc(void)
-{
-uint32_t lo, hi;
-/* We cannot use "=A", since this would use %rax on x86_64 */
-__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
-return (uint64_t)hi << 32 | lo;
-}
-
-static void sigsegv_expect(int sig)
-{
-	/* */
-}
-
-static void segvtask(void)
-{
-	if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0)
-	{
-		perror("prctl");
-		exit(0);
-	}
-	signal(SIGSEGV, sigsegv_expect);
-	alarm(10);
-	rdtsc();
-	fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n");
-	exit(0);
-}
-
-
-static void sigsegv_fail(int sig)
-{
-	fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n");
-	exit(0);
-}
-
-static void rdtsctask(void)
-{
-	if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0)
-	{
-		perror("prctl");
-		exit(0);
-	}
-	signal(SIGSEGV, sigsegv_fail);
-	alarm(10);
-	for(;;) rdtsc();
-}
-
-
-int main(void)
-{
-	int n_tasks = 100, i;
-
-	fprintf(stderr, "[No further output means we're allright]\n");
-
-	for (i=0; i<n_tasks; i++)
-		if (fork() == 0)
-		{
-			if (i & 1)
-				segvtask();
-			else
-				rdtsctask();
-		}
-
-	for (i=0; i<n_tasks; i++)
-		wait(NULL);
-
-	exit(0);
-}
-