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| author | Fam Zheng <famz@redhat.com> | 2018-01-16 14:08:55 +0800 |
|---|---|---|
| committer | Fam Zheng <famz@redhat.com> | 2018-02-08 09:22:03 +0800 |
| commit | bdd6a90a9e5fe22201dce84aea60ac08197e2c63 (patch) | |
| tree | 51510269cdaf1b43fadba613215f41066f8825f1 /block/trace-events | |
| parent | 418026ca43bc2626db092d7558258f9594366f28 (diff) | |
| download | qemu-bdd6a90a9e5fe22201dce84aea60ac08197e2c63.tar.gz | |
block: Add VFIO based NVMe driver
This is a new protocol driver that exclusively opens a host NVMe
controller through VFIO. It achieves better latency than linux-aio by
completely bypassing host kernel vfs/block layer.
$rw-$bs-$iodepth linux-aio nvme://
----------------------------------------
randread-4k-1 10.5k 21.6k
randread-512k-1 745 1591
randwrite-4k-1 30.7k 37.0k
randwrite-512k-1 1945 1980
(unit: IOPS)
The driver also integrates with the polling mechanism of iothread.
This patch is co-authored by Paolo and me.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20180116060901.17413-4-famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Diffstat (limited to 'block/trace-events')
| -rw-r--r-- | block/trace-events | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/block/trace-events b/block/trace-events index 11c8d5f590..02dd80ff0c 100644 --- a/block/trace-events +++ b/block/trace-events @@ -124,3 +124,24 @@ vxhs_open_iio_open(const char *host) "Failed to connect to storage agent on host vxhs_parse_uri_hostinfo(char *host, int port) "Host: IP %s, Port %d" vxhs_close(char *vdisk_guid) "Closing vdisk %s" vxhs_get_creds(const char *cacert, const char *client_key, const char *client_cert) "cacert %s, client_key %s, client_cert %s" + +# block/nvme.c +nvme_kick(void *s, int queue) "s %p queue %d" +nvme_dma_flush_queue_wait(void *s) "s %p" +nvme_error(int cmd_specific, int sq_head, int sqid, int cid, int status) "cmd_specific %d sq_head %d sqid %d cid %d status 0x%x" +nvme_process_completion(void *s, int index, int inflight) "s %p queue %d inflight %d" +nvme_process_completion_queue_busy(void *s, int index) "s %p queue %d" +nvme_complete_command(void *s, int index, int cid) "s %p queue %d cid %d" +nvme_submit_command(void *s, int index, int cid) "s %p queue %d cid %d" +nvme_submit_command_raw(int c0, int c1, int c2, int c3, int c4, int c5, int c6, int c7) "%02x %02x %02x %02x %02x %02x %02x %02x" +nvme_handle_event(void *s) "s %p" +nvme_poll_cb(void *s) "s %p" +nvme_prw_aligned(void *s, int is_write, uint64_t offset, uint64_t bytes, int flags, int niov) "s %p is_write %d offset %"PRId64" bytes %"PRId64" flags %d niov %d" +nvme_qiov_unaligned(const void *qiov, int n, void *base, size_t size, int align) "qiov %p n %d base %p size 0x%zx align 0x%x" +nvme_prw_buffered(void *s, uint64_t offset, uint64_t bytes, int niov, int is_write) "s %p offset %"PRId64" bytes %"PRId64" niov %d is_write %d" +nvme_rw_done(void *s, int is_write, uint64_t offset, uint64_t bytes, int ret) "s %p is_write %d offset %"PRId64" bytes %"PRId64" ret %d" +nvme_dma_map_flush(void *s) "s %p" +nvme_free_req_queue_wait(void *q) "q %p" +nvme_cmd_map_qiov(void *s, void *cmd, void *req, void *qiov, int entries) "s %p cmd %p req %p qiov %p entries %d" +nvme_cmd_map_qiov_pages(void *s, int i, uint64_t page) "s %p page[%d] 0x%"PRIx64 +nvme_cmd_map_qiov_iov(void *s, int i, void *page, int pages) "s %p iov[%d] %p pages %d" |