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capture: add frame type for defining and setting counters

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We might want to add a CTRADD type later on, for relative values rather
than absolute. But this should get us started.

Simply define counters upfront, and then set them during the capture
process.

Obviously, we need to come up with a good way to visualize this
information in the UI.
This commit is contained in:
Christian Hergert
2016-04-14 18:29:39 -07:00
parent 9ba08c8d93
commit c87a90cd9a
6 changed files with 392 additions and 26 deletions
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44
lib/sp-capture-types.h
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@ -54,6 +54,9 @@ typedef enum
SP_CAPTURE_FRAME_FORK = 5,
SP_CAPTURE_FRAME_EXIT = 6,
SP_CAPTURE_FRAME_JITMAP = 7,
SP_CAPTURE_FRAME_CTRDEF = 8,
SP_CAPTURE_FRAME_CTRADD = 9,
SP_CAPTURE_FRAME_CTRSET = 10,
} SpCaptureFrameType;
#pragma pack(push, 1)
@ -126,6 +129,43 @@ typedef struct
SpCaptureFrame frame;
} SpCaptureTimestamp;
typedef struct
{
gchar category[32];
gchar name[32];
gchar description[52];
guint32 id : 24;
guint8 type;
gint64 value;
} SpCaptureCounter;
typedef struct
{
SpCaptureFrame frame;
guint16 n_counters;
guint64 padding : 48;
SpCaptureCounter counters[0];
} SpCaptureFrameCounterDefine;
typedef struct
{
/*
* 96 bytes might seem a bit odd, but the counter frame header is 32
* bytes. So this makes a nice 2-cacheline aligned size which is
* useful when the number of counters is rather small.
*/
guint32 ids[8];
gint64 values[8];
} SpCaptureCounterValues;
typedef struct
{
SpCaptureFrame frame;
guint16 n_values;
guint64 padding : 48;
SpCaptureCounterValues values[0];
} SpCaptureFrameCounterSet;
#pragma pack(pop)
G_STATIC_ASSERT (sizeof (SpCaptureFileHeader) == 256);
@ -137,6 +177,10 @@ G_STATIC_ASSERT (sizeof (SpCaptureSample) == 32);
G_STATIC_ASSERT (sizeof (SpCaptureFork) == 28);
G_STATIC_ASSERT (sizeof (SpCaptureExit) == 24);
G_STATIC_ASSERT (sizeof (SpCaptureTimestamp) == 24);
G_STATIC_ASSERT (sizeof (SpCaptureCounter) == 128);
G_STATIC_ASSERT (sizeof (SpCaptureCounterValues) == 96);
G_STATIC_ASSERT (sizeof (SpCaptureFrameCounterDefine) == 32);
G_STATIC_ASSERT (sizeof (SpCaptureFrameCounterSet) == 32);
static inline gint
sp_capture_address_compare (SpCaptureAddress a,