Displaying 4 results from an estimated 4 matches for "do_relax".
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2016 Jan 21
1
[PATCH] tools/virtio: add ringtest utilities
...uses */
+#define barrier() asm volatile("" ::: "memory")
+
+/* Is there a portable way to do this? */
+#if defined(__x86_64__) || defined(__i386__)
+#define cpu_relax() asm ("rep; nop" ::: "memory")
+#else
+#define cpu_relax() assert(0)
+#endif
+
+extern bool do_relax;
+
+static inline void busy_wait(void)
+{
+ if (do_relax)
+ cpu_relax();
+ else
+ /* prevent compiler from removing busy loops */
+ barrier();
+}
+
+/*
+ * Not using __ATOMIC_SEQ_CST since gcc docs say they are only synchronized
+ * with other __ATOMIC_SEQ_CST calls.
+ */
+#define smp_mb() __sy...
2016 Jan 21
1
[PATCH] tools/virtio: add ringtest utilities
...uses */
+#define barrier() asm volatile("" ::: "memory")
+
+/* Is there a portable way to do this? */
+#if defined(__x86_64__) || defined(__i386__)
+#define cpu_relax() asm ("rep; nop" ::: "memory")
+#else
+#define cpu_relax() assert(0)
+#endif
+
+extern bool do_relax;
+
+static inline void busy_wait(void)
+{
+ if (do_relax)
+ cpu_relax();
+ else
+ /* prevent compiler from removing busy loops */
+ barrier();
+}
+
+/*
+ * Not using __ATOMIC_SEQ_CST since gcc docs say they are only synchronized
+ * with other __ATOMIC_SEQ_CST calls.
+ */
+#define smp_mb() __sy...
2017 Apr 07
0
[PATCH 2/3] ringtest: support test specific parameters
...ools/virtio/ringtest/main.c b/tools/virtio/ringtest/main.c
index f31353f..022ae95 100644
--- a/tools/virtio/ringtest/main.c
+++ b/tools/virtio/ringtest/main.c
@@ -20,6 +20,7 @@
int runcycles = 10000000;
int max_outstanding = INT_MAX;
int batch = 1;
+int param = 0;
bool do_sleep = false;
bool do_relax = false;
@@ -247,6 +248,11 @@ static const struct option longopts[] = {
.val = 'b',
},
{
+ .name = "param",
+ .has_arg = required_argument,
+ .val = 'p',
+ },
+ {
.name = "sleep",
.has_arg = no_argument,
.val = 's',
@@ -274,6 +280,7 @@...
2017 Apr 07
0
[PATCH 2/3] ringtest: support test specific parameters
...ools/virtio/ringtest/main.c b/tools/virtio/ringtest/main.c
index f31353f..022ae95 100644
--- a/tools/virtio/ringtest/main.c
+++ b/tools/virtio/ringtest/main.c
@@ -20,6 +20,7 @@
int runcycles = 10000000;
int max_outstanding = INT_MAX;
int batch = 1;
+int param = 0;
bool do_sleep = false;
bool do_relax = false;
@@ -247,6 +248,11 @@ static const struct option longopts[] = {
.val = 'b',
},
{
+ .name = "param",
+ .has_arg = required_argument,
+ .val = 'p',
+ },
+ {
.name = "sleep",
.has_arg = no_argument,
.val = 's',
@@ -274,6 +280,7 @@...