fio: add libpmem engine

[fio.git] / iolog.h

diff --git a/iolog.h b/iolog.h
index 0da70670c796ef1e8685394d88bb455a843d917b..bc3a0b5fea93770fa39309fb71526c751e803034 100644 (file)
--- a/iolog.h
+++ b/iolog.h
@@ -4,7 +4,7 @@
 #include "lib/rbtree.h"
 #include "lib/ieee754.h"
 #include "flist.h"
-#include "ioengine.h"
+#include "ioengines.h"
 
 /*
  * Use for maintaining statistics
@@ -18,12 +18,27 @@ struct io_stat {
        fio_fp64_t S;
 };
 
+struct io_hist {
+       uint64_t samples;
+       unsigned long hist_last;
+       struct flist_head list;
+};
+
+
+union io_sample_data {
+       uint64_t val;
+       struct io_u_plat_entry *plat_entry;
+};
+
+#define sample_val(value) ((union io_sample_data) { .val = value })
+#define sample_plat(plat) ((union io_sample_data) { .plat_entry = plat })
+
 /*
  * A single data sample
  */
 struct io_sample {
        uint64_t time;
-       uint64_t val;
+       union io_sample_data data;
        uint32_t __ddir;
        uint32_t bs;
 };
@@ -39,6 +54,7 @@ enum {
        IO_LOG_TYPE_SLAT,
        IO_LOG_TYPE_BW,
        IO_LOG_TYPE_IOPS,
+       IO_LOG_TYPE_HIST,
 };
 
 #define DEF_LOG_ENTRIES                1024
@@ -101,11 +117,25 @@ struct io_log {
         */
        struct io_stat avg_window[DDIR_RWDIR_CNT];
        unsigned long avg_msec;
-       unsigned long avg_last;
+       unsigned long avg_last[DDIR_RWDIR_CNT];
+
+       /*
+        * Windowed latency histograms, for keeping track of when we need to
+        * save a copy of the histogram every approximately hist_msec
+        * milliseconds.
+        */
+       struct io_hist hist_window[DDIR_RWDIR_CNT];
+       unsigned long hist_msec;
+       unsigned int hist_coarseness;
 
        pthread_mutex_t chunk_lock;
        unsigned int chunk_seq;
        struct flist_head chunk_list;
+
+       pthread_mutex_t deferred_free_lock;
+#define IOLOG_MAX_DEFER        8
+       void *deferred_items[IOLOG_MAX_DEFER];
+       unsigned int deferred;
 };
 
 /*
@@ -134,6 +164,11 @@ static inline size_t log_entry_sz(struct io_log *log)
        return __log_entry_sz(log->log_offset);
 }
 
+static inline size_t log_sample_sz(struct io_log *log, struct io_logs *cur_log)
+{
+       return cur_log->nr_samples * log_entry_sz(log);
+}
+
 static inline struct io_sample *__get_sample(void *samples, int log_offset,
                                             uint64_t sample)
 {
@@ -218,6 +253,8 @@ extern int iolog_file_inflate(const char *);
 struct log_params {
        struct thread_data *td;
        unsigned long avg_msec;
+       unsigned long hist_msec;
+       int hist_coarseness;
        int log_type;
        int log_offset;
        int log_gz;
@@ -227,13 +264,29 @@ struct log_params {
 
 static inline bool per_unit_log(struct io_log *log)
 {
-       return log && !log->avg_msec;
+       return log && (!log->avg_msec || log->log_gz || log->log_gz_store);
+}
+
+static inline bool inline_log(struct io_log *log)
+{
+       return log->log_type == IO_LOG_TYPE_LAT ||
+               log->log_type == IO_LOG_TYPE_CLAT ||
+               log->log_type == IO_LOG_TYPE_SLAT;
+}
+
+static inline void ipo_bytes_align(unsigned int replay_align, struct io_piece *ipo)
+{
+       if (!replay_align)
+               return;
+
+       ipo->offset &= ~(replay_align - (uint64_t)1);
 }
 
 extern void finalize_logs(struct thread_data *td, bool);
 extern void setup_log(struct io_log **, struct log_params *, const char *);
-extern void flush_log(struct io_log *, int);
+extern void flush_log(struct io_log *, bool);
 extern void flush_samples(FILE *, void *, uint64_t);
+extern unsigned long hist_sum(int, int, unsigned int *, unsigned int *);
 extern void free_log(struct io_log *);
 extern void fio_writeout_logs(bool);
 extern void td_writeout_logs(struct thread_data *, bool);