From 764b10dda52b97b215713bcae15d0cd107a83c7e Mon Sep 17 00:00:00 2001
From: Raymond Knopp <raymond.knopp@eurecom.fr>
Date: Thu, 17 Jul 2014 11:54:22 +0000
Subject: [PATCH] git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5523
818b1a75-f10b-46b9-bf7c-635c3b92a50f
---
targets/RT/USER/lte-softmodem.c | 32 ++++++++++++++++++++++++++++++--
1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/targets/RT/USER/lte-softmodem.c b/targets/RT/USER/lte-softmodem.c
index 3e9823871aa..e493997d515 100644
--- a/targets/RT/USER/lte-softmodem.c
+++ b/targets/RT/USER/lte-softmodem.c
@@ -340,6 +340,36 @@ void exit_fun(const char* s)
//exit (-1);
}
+static int latency_target_fd = -1;
+static int32_t latency_target_value = 0;
+/* Latency trick - taken from cyclictest.c
+* if the file /dev/cpu_dma_latency exists,
+* open it and write a zero into it. This will tell
+* the power management system not to transition to
+* a high cstate (in fact, the system acts like idle=poll)
+* When the fd to /dev/cpu_dma_latency is closed, the behavior
+* goes back to the system default.
+*
+* Documentation/power/pm_qos_interface.txt
+*/
+static void set_latency_target(void)
+{
+ struct stat s;
+ int ret;
+ if (stat("/dev/cpu_dma_latency", &s) == 0) {
+ latency_target_fd = open("/dev/cpu_dma_latency", O_RDWR);
+ if (latency_target_fd == -1)
+ return;
+ ret = write(latency_target_fd, &latency_target_value, 4);
+ if (ret == 0) {
+ printf("# error setting cpu_dma_latency to %d!: %s\n", latency_target_value, strerror(errno));
+ close(latency_target_fd);
+ return;
+ }
+ printf("# /dev/cpu_dma_latency set to %dus\n", latency_target_value);
+ }
+}
+
#ifdef XFORMS
static void *scope_thread(void *arg) {
char stats_buffer[16384];
@@ -407,8 +437,6 @@ static void *scope_thread(void *arg) {
}
#endif
-int dummy_tx_buffer[3840*4] __attribute__((aligned(16)));
-
#ifdef EMOS
#define NO_ESTIMATES_DISK 100 //No. of estimates that are aquired before dumped to disk
--
GitLab