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mesa/glthread: decrease the batch size for better perf scaling

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This is the key to better performance.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
This commit is contained in:
Marek Olšák
2017-06-21 22:32:20 +02:00
parent 09f6915bf8
commit 4f38b48e05
1 changed files with 11 additions and 3 deletions
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14
src/mesa/main/glthread.h
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@@ -26,8 +26,16 @@
#include "main/mtypes.h" #include "main/mtypes.h"
/* Command size is a number of bytes stored in a short. */ /* The size of one batch and the maximum size of one call.
#define MARSHAL_MAX_CMD_SIZE 65535 *
* This should be as low as possible, so that:
* - multiple synchronizations within a frame don't slow us down much
* - a smaller number of calls per frame can still get decent parallelism
* - the memory footprint of the queue is low, and with that comes a lower
* chance of experiencing CPU cache thrashing
* but it should be high enough so that u_queue overhead remains negligible.
*/
#define MARSHAL_MAX_CMD_SIZE (8 * 1024)
/* The number of batch slots in memory. /* The number of batch slots in memory.
* *
@@ -35,7 +43,7 @@
* waiting batches. There must be at least 1 slot for a waiting batch, * waiting batches. There must be at least 1 slot for a waiting batch,
* so the minimum number of batches is 3. * so the minimum number of batches is 3.
*/ */
#define MARSHAL_MAX_BATCHES 4 #define MARSHAL_MAX_BATCHES 8
#include <inttypes.h> #include <inttypes.h>
#include <stdbool.h> #include <stdbool.h>