Merge branch 'chunked-iolog-reading' of https://github.com/aclamk/fio
[fio.git] / iolog.c
diff --git a/iolog.c b/iolog.c
index eb38027..b0122be 100644 (file)
--- a/iolog.c
+++ b/iolog.c
@@ -141,6 +141,8 @@ static int ipo_special(struct thread_data *td, struct io_piece *ipo)
        return 1;
 }
 
+static bool read_iolog2(struct thread_data *td);
+
 int read_iolog_get(struct thread_data *td, struct io_u *io_u)
 {
        struct io_piece *ipo;
@@ -148,7 +150,13 @@ int read_iolog_get(struct thread_data *td, struct io_u *io_u)
 
        while (!flist_empty(&td->io_log_list)) {
                int ret;
-
+               if (td->o.read_iolog_chunked) {
+                       if (td->io_log_checkmark == td->io_log_current) {
+                               if (!read_iolog2(td))
+                                       return 1;
+                       }
+                       td->io_log_current--;
+               }
                ipo = flist_first_entry(&td->io_log_list, struct io_piece, list);
                flist_del(&ipo->list);
                remove_trim_entry(td, ipo);
@@ -345,7 +353,7 @@ void write_iolog_close(struct thread_data *td)
  * Read version 2 iolog data. It is enhanced to include per-file logging,
  * syncs, etc.
  */
-static bool read_iolog2(struct thread_data *td, FILE *f)
+static bool read_iolog2(struct thread_data *td)
 {
        unsigned long long offset;
        unsigned int bytes;
@@ -353,9 +361,28 @@ static bool read_iolog2(struct thread_data *td, FILE *f)
        char *rfname, *fname, *act;
        char *str, *p;
        enum fio_ddir rw;
+       int64_t items_to_fetch = 0;
 
-       free_release_files(td);
-
+       if (td->o.read_iolog_chunked) {
+               if (td->io_log_highmark == 0) {
+                       items_to_fetch = 10;
+               } else {
+                       struct timespec now;
+                       uint64_t elapsed;
+                       uint64_t for_1s;
+                       fio_gettime(&now, NULL);
+                       elapsed = ntime_since(&td->io_log_highmark_time, &now);
+                       for_1s = (td->io_log_highmark - td->io_log_current) * 1000000000 / elapsed;
+                       items_to_fetch = for_1s - td->io_log_current;
+                       if (items_to_fetch < 0)
+                               items_to_fetch = 0;
+                       td->io_log_highmark = td->io_log_current + items_to_fetch;
+                       td->io_log_checkmark = (td->io_log_highmark + 1) / 2;
+                       fio_gettime(&td->io_log_highmark_time, NULL);
+                       if (items_to_fetch == 0)
+                               return true;
+               }
+       }
        /*
         * Read in the read iolog and store it, reuse the infrastructure
         * for doing verifications.
@@ -365,7 +392,7 @@ static bool read_iolog2(struct thread_data *td, FILE *f)
        act = malloc(256+16);
 
        reads = writes = waits = 0;
-       while ((p = fgets(str, 4096, f)) != NULL) {
+       while ((p = fgets(str, 4096, td->io_log_rfile)) != NULL) {
                struct io_piece *ipo;
                int r;
 
@@ -468,18 +495,39 @@ static bool read_iolog2(struct thread_data *td, FILE *f)
                }
 
                queue_io_piece(td, ipo);
+
+               if (td->o.read_iolog_chunked) {
+                       td->io_log_current++;
+                       items_to_fetch--;
+                       if (items_to_fetch == 0)
+                               break;
+               }
        }
 
        free(str);
        free(act);
        free(rfname);
 
+       if (td->o.read_iolog_chunked) {
+               td->io_log_highmark = td->io_log_current;
+               td->io_log_checkmark = (td->io_log_highmark + 1) / 2;
+               fio_gettime(&td->io_log_highmark_time, NULL);
+       }
+
        if (writes && read_only) {
                log_err("fio: <%s> skips replay of %d writes due to"
                        " read-only\n", td->o.name, writes);
                writes = 0;
        }
 
+       if (td->o.read_iolog_chunked) {
+               if (td->io_log_current == 0) {
+                       return false;
+               }
+               td->o.td_ddir = TD_DDIR_RW;
+               return true;
+       }
+
        if (!reads && !writes && !waits)
                return false;
        else if (reads && !writes)
@@ -544,19 +592,20 @@ static bool init_iolog_read(struct thread_data *td)
                fclose(f);
                return false;
        }
-
+       td->io_log_rfile = f;
        /*
         * version 2 of the iolog stores a specific string as the
         * first line, check for that
         */
-       if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2)))
-               ret = read_iolog2(td, f);
+       if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2))) {
+               free_release_files(td);
+               ret = read_iolog2(td);
+       }
        else {
                log_err("fio: iolog version 1 is no longer supported\n");
                ret = false;
        }
 
-       fclose(f);
        return ret;
 }