[4/4] DAPL: Support for Linux on System z in perftest package

Commit Message

Alexey Ishchuk Dec. 19, 2013, 11:53 a.m. UTC

s390: Add support for Linux on System z

This patch adds the required code to support Linux on System z.



--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to [e-mail]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Patch

diff -aurp /usr/src/packages/BUILD/perftest-2.0/src/get_clock.c perftest-2.0/src/get_clock.c
--- /usr/src/packages/BUILD/perftest-2.0/src/get_clock.c	2013-06-27 14:36:35.000000000 +0200
+++ perftest-2.0/src/get_clock.c	2013-12-17 11:18:44.765167244 +0100
@@ -132,6 +132,7 @@  static double sample_get_cpu_mhz(void)
 	return b;
 }
 
+#ifndef __s390x__
 static double proc_get_cpu_mhz(int no_cpu_freq_fail)
 {
 	FILE* f;
@@ -177,9 +178,13 @@  static double proc_get_cpu_mhz(int no_cp
 	return mhz;
 }
 
+#endif
 
 double get_cpu_mhz(int no_cpu_freq_fail)
 {
+#ifdef __s390x__
+	return sample_get_cpu_mhz();
+#else
 	double sample, proc, delta;
 	sample = sample_get_cpu_mhz();
 	proc = proc_get_cpu_mhz(no_cpu_freq_fail);
@@ -195,4 +200,5 @@  double get_cpu_mhz(int no_cpu_freq_fail)
 			return sample;
 	}
 	return proc;
+#endif
 }
diff -aurp /usr/src/packages/BUILD/perftest-2.0/src/get_clock.h perftest-2.0/src/get_clock.h
--- /usr/src/packages/BUILD/perftest-2.0/src/get_clock.h	2013-01-09 10:46:27.000000000 +0100
+++ perftest-2.0/src/get_clock.h	2013-12-17 11:18:44.765167244 +0100
@@ -70,7 +70,15 @@  static inline cycles_t get_cycles()
 	asm volatile ("mov %0=ar.itc" : "=r" (ret));
 	return ret;
 }
+#elif defined(__s390x__)
+typedef unsigned long long cycles_t;
+static inline cycles_t get_cycles(void)
+{
+	cycles_t	clk;
 
+	asm volatile("stck %0" : "=Q" (clk) : : "cc");
+	return clk >> 2;
+}
 #else
 #warning get_cycles not implemented for this architecture: attempt asm/timex.h
 #include <asm/timex.h>