From: Martin Mares <mj@ucw.cz>
Date: Fri, 1 Dec 2006 21:04:38 +0000 (+0100)
Subject: Adapted the file-test to use asio.
X-Git-Tag: holmes-import~506^2~13^2~224
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=ae8a9dd77d64838c354731ab32cc42b5bf576738;p=libucw.git

Adapted the file-test to use asio.
---

diff --git a/debug/sorter/Makefile b/debug/sorter/Makefile
index 8ef96631..70f745dc 100644
--- a/debug/sorter/Makefile
+++ b/debug/sorter/Makefile
@@ -1,7 +1,9 @@
 # Testing the new sorter
 
 DIRS+=debug/sorter
-PROGS+=$(addprefix $(o)/debug/sorter/,retros file-test)
+PROGS+=$(addprefix $(o)/debug/sorter/,retros file-test asio-test)
 
 $(o)/debug/sorter/retros: $(o)/debug/sorter/retros.o $(LIBSH)
 $(o)/debug/sorter/file-test: $(o)/debug/sorter/file-test.o $(LIBSH)
+$(o)/debug/sorter/asio-test: $(o)/debug/sorter/asio-test.o $(LIBSH)
+$(o)/debug/sorter/asio-test: LIBS+=-lpthread
diff --git a/debug/sorter/asio-test.c b/debug/sorter/asio-test.c
new file mode 100644
index 00000000..f3f384ca
--- /dev/null
+++ b/debug/sorter/asio-test.c
@@ -0,0 +1,145 @@
+/*
+ *  An experiment with parallel reading and writing of files using ASIO.
+ */
+
+#include "lib/lib.h"
+#include "lib/lfs.h"
+#include "lib/asio.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define COPY
+#define DIRECT O_DIRECT
+
+#define P_INIT do { cnt = 0; cnt_rep = 0; cnt_ms = 1; } while(0)
+#define P_UPDATE(cc) do { \
+  cnt += cc; \
+  if (cnt >= cnt_rep) { cnt_ms += get_timer(); \
+    printf("%d of %d MB (%.2f MB/sec)\r", (int)(cnt >> 20), (int)(total_size >> 20), (double)cnt / 1048576 * 1000 / cnt_ms); \
+    fflush(stdout); cnt_rep += 1<<26; } } while(0)
+#define P_FINAL do { \
+  cnt_ms += get_timer(); \
+  log(L_INFO, "Spent %.3f sec (%.2f MB/sec)", (double)cnt_ms/1000, (double)cnt / 1048576 * 1000 / cnt_ms); \
+} while(0)
+
+static struct asio_queue io_queue;
+
+int main(int argc, char **argv)
+{
+  ASSERT(argc == 4);
+  uns files = atol(argv[1]);
+  uns bufsize = atol(argv[2]) * 1024;				// Kbytes
+  u64 total_size = (u64)atol(argv[3]) * 1024*1024*1024;		// Gbytes
+  u64 cnt, cnt_rep;
+  uns cnt_ms;
+  int fd[files];
+  byte name[files][16];
+
+  init_timer();
+
+  io_queue.buffer_size = bufsize;
+  io_queue.max_writebacks = 2;
+  asio_init_queue(&io_queue);
+
+#ifdef COPY
+  log(L_INFO, "Creating input file");
+  int in_fd = sh_open("tmp/ft-in", O_RDWR | O_CREAT | O_TRUNC | DIRECT, 0666);
+  ASSERT(in_fd >= 0);
+  ASSERT(!(total_size % bufsize));
+  P_INIT;
+  for (uns i=0; i<total_size/bufsize; i++)
+    {
+      struct asio_request *r = asio_get(&io_queue);
+      r->op = ASIO_WRITE_BACK;
+      r->fd = in_fd;
+      r->len = bufsize;
+      byte *xbuf = r->buffer;
+      for (uns j=0; j<bufsize; j++)
+	xbuf[j] = i+j;
+      asio_submit(r);
+      P_UPDATE(bufsize);
+    }
+  asio_sync(&io_queue);
+  lseek(in_fd, 0, SEEK_SET);
+  sync();
+  P_FINAL;
+#endif
+
+  log(L_INFO, "Initializing output files");
+  for (uns i=0; i<files; i++)
+    {
+      sprintf(name[i], "tmp/ft-%d", i);
+      fd[i] = sh_open(name[i], O_RDWR | O_CREAT | O_TRUNC | DIRECT, 0666);
+      if (fd[i] < 0)
+	die("Cannot create %s: %m", name[i]);
+    }
+  sync();
+  get_timer();
+
+  log(L_INFO, "Writing %d MB to %d files in parallel with %d byte buffers", (int)(total_size >> 20), files, bufsize);
+  P_INIT;
+  for (uns round=0; round<total_size/bufsize/files; round++)
+    {
+      for (uns i=0; i<files; i++)
+	{
+	  struct asio_request *r = asio_get(&io_queue);
+#ifdef COPY
+	  r->op = ASIO_READ;
+	  r->fd = in_fd;
+	  r->len = bufsize;
+	  asio_submit(r);
+	  struct asio_request *rr = asio_wait(&io_queue);
+	  ASSERT(rr == r && r->status == (int)r->len);
+#else
+	  for (uns j=0; j<bufsize; j++)
+	    r->buffer[j] = round+i+j;
+#endif
+	  r->op = ASIO_WRITE_BACK;
+	  r->fd = fd[i];
+	  r->len = bufsize;
+	  asio_submit(r);
+	  P_UPDATE(bufsize);
+	}
+    }
+  asio_sync(&io_queue);
+#ifdef COPY
+  close(in_fd);
+#endif
+  log(L_INFO, "Syncing");
+  sync();
+  P_FINAL;
+
+  log(L_INFO, "Reading the files sequentially");
+  P_INIT;
+  for (uns i=0; i<files; i++)
+    {
+      lseek(fd[i], 0, SEEK_SET);
+      for (uns round=0; round<total_size/bufsize/files; round++)
+	{
+	  struct asio_request *rr, *r = asio_get(&io_queue);
+	  r->op = ASIO_READ;
+	  r->fd = fd[i];
+	  r->len = bufsize;
+	  asio_submit(r);
+	  rr = asio_wait(&io_queue);
+	  ASSERT(rr == r && r->status == (int)bufsize);
+	  asio_put(r);
+	  P_UPDATE(bufsize);
+	}
+      close(fd[i]);
+    }
+  P_FINAL;
+
+  for (uns i=0; i<files; i++)
+    unlink(name[i]);
+#ifdef COPY
+  unlink("tmp/ft-in");
+#endif
+
+  asio_cleanup_queue(&io_queue);
+  log(L_INFO, "Done");
+  return 0;
+}