Performance: cache the backend pages pointer in context

[lttng-modules.git] / lib / ringbuffer / config.h

diff --git a/lib/ringbuffer/config.h b/lib/ringbuffer/config.h
index 63189b950faa68fa4e5e348c41f1aba55dcdc098..60174db63a38687e256b3726e7a83dcd0af47209 100644 (file)
--- a/lib/ringbuffer/config.h
+++ b/lib/ringbuffer/config.h
@@ -200,6 +200,8 @@ struct lib_ring_buffer_ctx {
                                         */
        u64 tsc;                        /* time-stamp counter value */
        unsigned int rflags;            /* reservation flags */
+       /* Cache backend pages pointer chasing. */
+       struct lib_ring_buffer_backend_pages *backend_pages;
 };
 
 /**
@@ -223,6 +225,7 @@ void lib_ring_buffer_ctx_init(struct lib_ring_buffer_ctx *ctx,
        ctx->largest_align = largest_align;
        ctx->cpu = cpu;
        ctx->rflags = 0;
+       ctx->backend_pages = NULL;
 }
 
 /*