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authorAndreas Sandberg <andreas.sandberg@arm.com>2015-09-11 15:56:09 +0100
committerAndreas Sandberg <andreas.sandberg@arm.com>2015-09-11 15:56:09 +0100
commita1517867415abe0705d195bbe4cf62cc7fa03e47 (patch)
treec3388a37379ccf1110492f7b451912d0b8644461 /src
parentf7055e9215106fbd8297083298a815ef7098a028 (diff)
downloadgem5-a1517867415abe0705d195bbe4cf62cc7fa03e47.tar.xz
dev: Add an underrun statistic to the HDLCD controller
Add a stat that counts buffer underruns in the HDLCD controller. The stat counts at most one underrun per frame since the controller aborts the current frame if it underruns.
Diffstat (limited to 'src')
-rw-r--r--src/dev/arm/hdlcd.cc13
-rw-r--r--src/dev/arm/hdlcd.hh7
2 files changed, 20 insertions, 0 deletions
diff --git a/src/dev/arm/hdlcd.cc b/src/dev/arm/hdlcd.cc
index 84df24472..2c402b00a 100644
--- a/src/dev/arm/hdlcd.cc
+++ b/src/dev/arm/hdlcd.cc
@@ -95,6 +95,18 @@ HDLcd::~HDLcd()
}
void
+HDLcd::regStats()
+{
+ using namespace Stats;
+
+ stats.underruns
+ .name(name() + ".underruns")
+ .desc("number of buffer underruns")
+ .flags(nozero)
+ ;
+}
+
+void
HDLcd::serialize(CheckpointOut &cp) const
{
DPRINTF(Checkpoint, "Serializing ARM HDLCD\n");
@@ -503,6 +515,7 @@ void
HDLcd::pxlUnderrun()
{
DPRINTF(HDLcd, "Buffer underrun, stopping DMA fill.\n");
+ ++stats.underruns;
intRaise(INT_UNDERRUN);
dmaEngine->abortFrame();
}
diff --git a/src/dev/arm/hdlcd.hh b/src/dev/arm/hdlcd.hh
index 3a83c6ad4..cb47b8522 100644
--- a/src/dev/arm/hdlcd.hh
+++ b/src/dev/arm/hdlcd.hh
@@ -95,6 +95,8 @@ class HDLcd: public AmbaDmaDevice
HDLcd(const HDLcdParams *p);
~HDLcd();
+ void regStats() M5_ATTR_OVERRIDE;
+
void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
@@ -381,6 +383,11 @@ class HDLcd: public AmbaDmaDevice
};
std::unique_ptr<DmaEngine> dmaEngine;
+
+ protected: // Statistics
+ struct {
+ Stats::Scalar underruns;
+ } stats;
};
#endif