From 9eb4d695c49a85f7f72ad68c3c31affd61fef984 Mon Sep 17 00:00:00 2001 From: Joshua Haberman Date: Fri, 1 Apr 2011 15:40:06 -0700 Subject: First rough version of the JIT. It can successfully parse SpeedMessage1. Preliminary results: 750MB/s on Core2 2.4GHz. This number is 2.5x proto2. This isn't apples-to-apples, because proto2 is parsing to a struct and we are just doing stream parsing, but for apps that are currently using proto2, this is the improvement they would see if they could move to stream-based processing. Unfortunately perf-regression-test.py is broken, and I'm not 100% sure why. It would be nice to fix it first (to ensure that there are no performance regressions for the table-based decoder) but I'm really impatient to get the JIT checked in. --- src/upb_decoder.h | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) (limited to 'src/upb_decoder.h') diff --git a/src/upb_decoder.h b/src/upb_decoder.h index bb54930..1be31c4 100644 --- a/src/upb_decoder.h +++ b/src/upb_decoder.h @@ -27,13 +27,12 @@ extern "C" { /* upb_decoder *****************************************************************/ +struct dasm_State; + struct _upb_decoder { // Bytesrc from which we pull serialized data. upb_bytesrc *bytesrc; - // Dispatcher to which we push parsed data. - upb_dispatcher dispatcher; - // String to hold our input buffer; is only active if d->buf != NULL. upb_string *bufstr; @@ -48,6 +47,7 @@ struct _upb_decoder { // End of this buffer, relative to *ptr. const char *end; + const char *jit_end; // Members which may also be written by the JIT: @@ -57,8 +57,21 @@ struct _upb_decoder { // End of this submessage, relative to *ptr. const char *submsg_end; + // MIN(end, submsg_end) + const char *effective_end; + // Where we will store any errors that occur. upb_status *status; + + // Dispatcher to which we push parsed data. + upb_dispatcher dispatcher; + + // JIT-generated machine code (else NULL). + char *jit_code; + size_t jit_size; + char *debug_info; + + struct dasm_State *dynasm; }; // A upb_decoder decodes the binary protocol buffer format, writing the data it -- cgit v1.2.3