X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=memory.c;h=be1fd24c8037623864333680c268770785f0e10b;hp=384b80617f609ca65c6f099b1c073de4c78cc20c;hb=84422acde41c9cf462245de115d425cf5a82124c;hpb=9b33b4794b621b28347e8ca8fb425b918052434c

diff --git a/memory.c b/memory.c
index 384b8061..be1fd24c 100644
--- a/memory.c
+++ b/memory.c
@@ -6,13 +6,13 @@
 #include <sys/mman.h>
 
 #include "fio.h"
-#include "os.h"
 
 static void *pinned_mem;
 
 void fio_unpin_memory(void)
 {
 	if (pinned_mem) {
+		dprint(FD_MEM, "unpinning %llu bytes\n", mlock_size);
 		if (munlock(pinned_mem, mlock_size) < 0)
 			perror("munlock");
 		munmap(pinned_mem, mlock_size);
@@ -27,6 +27,8 @@ int fio_pin_memory(void)
 	if (!mlock_size)
 		return 0;
 
+	dprint(FD_MEM, "pinning %llu bytes\n", mlock_size);
+
 	/*
 	 * Don't allow mlock of more than real_mem-128MB
 	 */
@@ -54,75 +56,138 @@ int fio_pin_memory(void)
 	return 0;
 }
 
-/*
- * Setup the buffer area we need for io.
- */
-int allocate_io_mem(struct thread_data *td)
+static int alloc_mem_shm(struct thread_data *td)
 {
-	if (td->o.mem_type == MEM_MALLOC)
-		td->orig_buffer = malloc(td->orig_buffer_size);
-	else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) {
-		int flags = IPC_CREAT | SHM_R | SHM_W;
+	int flags = IPC_CREAT | SHM_R | SHM_W;
+
+	if (td->o.mem_type == MEM_SHMHUGE)
+		flags |= SHM_HUGETLB;
+
+	td->shm_id = shmget(IPC_PRIVATE, td->orig_buffer_size, flags);
+	dprint(FD_MEM, "shmget %zu, %d\n", td->orig_buffer_size, td->shm_id);
+	if (td->shm_id < 0) {
+		td_verror(td, errno, "shmget");
+		if (geteuid() != 0 && errno == ENOMEM)
+			log_err("fio: you may need to run this job as root\n");
+		if (td->o.mem_type == MEM_SHMHUGE) {
+			if (errno == EINVAL)
+				log_err("fio: check that you have free huge pages and that hugepage-size is correct.\n");
+			else if (errno == ENOSYS)
+				log_err("fio: your system does not appear to support huge pages.\n");
+			else if (errno == ENOMEM)
+				log_err("fio: no huge pages available, do you need to alocate some? See HOWTO.\n");
+		}
+		
+		return 1;
+	}
 
-		if (td->o.mem_type == MEM_SHMHUGE)
-			flags |= SHM_HUGETLB;
+	td->orig_buffer = shmat(td->shm_id, NULL, 0);
+	dprint(FD_MEM, "shmat %d, %p\n", td->shm_id, td->orig_buffer);
+	if (td->orig_buffer == (void *) -1) {
+		td_verror(td, errno, "shmat");
+		td->orig_buffer = NULL;
+		return 1;
+	}
 
-		td->shm_id = shmget(IPC_PRIVATE, td->orig_buffer_size, flags);
-		if (td->shm_id < 0) {
-			td_verror(td, errno, "shmget");
-			return 1;
-		}
+	return 0;
+}
+
+static int alloc_mem_mmap(struct thread_data *td)
+{
+	int flags = MAP_PRIVATE;
+
+	td->mmapfd = 0;
+
+	if (td->mmapfile) {
+		td->mmapfd = open(td->mmapfile, O_RDWR|O_CREAT, 0644);
 
-		td->orig_buffer = shmat(td->shm_id, NULL, 0);
-		if (td->orig_buffer == (void *) -1) {
-			td_verror(td, errno, "shmat");
+		if (td->mmapfd < 0) {
+			td_verror(td, errno, "open mmap file");
 			td->orig_buffer = NULL;
 			return 1;
 		}
-	} else if (td->o.mem_type == MEM_MMAP ||
-		   td->o.mem_type == MEM_MMAPHUGE) {
-		int flags = MAP_PRIVATE;
-
-		td->mmapfd = 0;
-
-		if (td->mmapfile) {
-			td->mmapfd = open(td->mmapfile, O_RDWR|O_CREAT, 0644);
-
-			if (td->mmapfd < 0) {
-				td_verror(td, errno, "open mmap file");
-				td->orig_buffer = NULL;
-				return 1;
-			}
-		} else
-			flags |= OS_MAP_ANON;
-
-		td->orig_buffer = mmap(NULL, td->orig_buffer_size, PROT_READ | PROT_WRITE, flags, td->mmapfd, 0);
-		if (td->orig_buffer == MAP_FAILED) {
-			td_verror(td, errno, "mmap");
+		if (ftruncate(td->mmapfd, td->orig_buffer_size) < 0) {
+			td_verror(td, errno, "truncate mmap file");
 			td->orig_buffer = NULL;
-			if (td->mmapfd) {
-				close(td->mmapfd);
-				unlink(td->mmapfile);
-			}
-				
 			return 1;
 		}
+	} else
+		flags |= OS_MAP_ANON;
+
+	td->orig_buffer = mmap(NULL, td->orig_buffer_size, PROT_READ | PROT_WRITE, flags, td->mmapfd, 0);
+	dprint(FD_MEM, "mmap %zu/%d %p\n", td->orig_buffer_size, td->mmapfd,
+							td->orig_buffer);
+	if (td->orig_buffer == MAP_FAILED) {
+		td_verror(td, errno, "mmap");
+		td->orig_buffer = NULL;
+		if (td->mmapfd) {
+			close(td->mmapfd);
+			unlink(td->mmapfile);
+		}
+			
+		return 1;
 	}
 
 	return 0;
 }
 
-void free_io_mem(struct thread_data *td)
+static int alloc_mem_malloc(struct thread_data *td)
+{
+	unsigned int bsize = td->orig_buffer_size;
+
+	if (td->o.odirect)
+		bsize += page_mask;
+		
+	td->orig_buffer = malloc(bsize);
+	dprint(FD_MEM, "malloc %u %p\n", bsize, td->orig_buffer);
+	if (td->orig_buffer)
+		return 0;
+
+	return 1;
+}
+
+/*
+ * Setup the buffer area we need for io.
+ */
+int allocate_io_mem(struct thread_data *td)
 {
+	int ret = 0;
+
+	if (td->io_ops->flags & FIO_NOIO)
+		return 0;
+
 	if (td->o.mem_type == MEM_MALLOC)
+		ret = alloc_mem_malloc(td);
+	else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE)
+		ret = alloc_mem_shm(td);
+	else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE)
+		ret = alloc_mem_mmap(td);
+	else {
+		log_err("fio: bad mem type: %d\n", td->o.mem_type);
+		ret = 1;
+	}
+
+	if (ret)
+		td_verror(td, ENOMEM, "iomem allocation");
+
+	return ret;
+}
+
+void free_io_mem(struct thread_data *td)
+{
+	if (td->o.mem_type == MEM_MALLOC) {
+		dprint(FD_MEM, "free mem %p\n", td->orig_buffer);
 		free(td->orig_buffer);
-	else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) {
+	} else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) {
 		struct shmid_ds sbuf;
 
+		dprint(FD_MEM, "shmdt/ctl %d %p\n", td->shm_id,td->orig_buffer);
 		shmdt(td->orig_buffer);
 		shmctl(td->shm_id, IPC_RMID, &sbuf);
 	} else if (td->o.mem_type == MEM_MMAP ||
 		   td->o.mem_type == MEM_MMAPHUGE) {
+		dprint(FD_MEM, "munmap %zu %p\n", td->orig_buffer_size,
+							td->orig_buffer);
 		munmap(td->orig_buffer, td->orig_buffer_size);
 		if (td->mmapfile) {
 			close(td->mmapfd);