This patch adds the required platform specific code to allow execution of
the perftest package applications on the s390x platform.
Signed-off-by: Alexey Ishchuk <aishc...@linux.vnet.ibm.com>
---
README | 2 ++
src/get_clock.c | 6 ++++++
src/get_clock.h | 8 ++++++++
3 files changed, 16 insertions(+)
--- a/README
+++ b/README
@@ -234,3 +234,5 @@ Special feature detailed explanation in
Please use the same perftest version on both sides to ensure consistency
of benchmark results.
6. This version (5.0) won't work with previous versions of perftest.
+
+ 7. In the s390x platform virtualized environment the results shown by package
test applications can be incorrect.
--- a/src/get_clock.c
+++ b/src/get_clock.c
@@ -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;
@@ -181,9 +182,13 @@ 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);
@@ -199,4 +204,5 @@ double get_cpu_mhz(int no_cpu_freq_fail)
return sample;
}
return proc;
+#endif
}
--- a/src/get_clock.h
+++ b/src/get_clock.h
@@ -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>
--
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