1 # Trace events for debugging and performance instrumentation
3 # This file is processed by the tracetool script during the build.
5 # To add a new trace event:
7 # 1. Choose a name for the trace event. Declare its arguments and format
10 # 2. Call the trace event from code using trace_##name, e.g. multiwrite_cb() ->
11 # trace_multiwrite_cb(). The source file must #include "trace.h".
13 # Format of a trace event:
15 # [disable] <name>(<type1> <arg1>[, <type2> <arg2>] ...) "<format-string>"
17 # Example: qemu_malloc(size_t size) "size %zu"
19 # The "disable" keyword will build without the trace event.
20 # In case of 'simple' trace backend, it will allow the trace event to be
21 # compiled, but this would be turned off by default. It can be toggled on via
24 # The <name> must be a valid as a C function name.
26 # Types should be standard C types. Use void * for pointers because the trace
27 # system may not have the necessary headers included.
29 # The <format-string> should be a sprintf()-compatible format string.
32 disable qemu_malloc(size_t size, void *ptr) "size %zu ptr %p"
33 disable qemu_realloc(void *ptr, size_t size, void *newptr) "ptr %p size %zu newptr %p"
34 disable qemu_free(void *ptr) "ptr %p"
37 disable qemu_memalign(size_t alignment, size_t size, void *ptr) "alignment %zu size %zu ptr %p"
38 disable qemu_vmalloc(size_t size, void *ptr) "size %zu ptr %p"
39 disable qemu_vfree(void *ptr) "ptr %p"
42 disable virtqueue_fill(void *vq, const void *elem, unsigned int len, unsigned int idx) "vq %p elem %p len %u idx %u"
43 disable virtqueue_flush(void *vq, unsigned int count) "vq %p count %u"
44 disable virtqueue_pop(void *vq, void *elem, unsigned int in_num, unsigned int out_num) "vq %p elem %p in_num %u out_num %u"
45 disable virtio_queue_notify(void *vdev, int n, void *vq) "vdev %p n %d vq %p"
46 disable virtio_irq(void *vq) "vq %p"
47 disable virtio_notify(void *vdev, void *vq) "vdev %p vq %p"
50 disable multiwrite_cb(void *mcb, int ret) "mcb %p ret %d"
51 disable bdrv_aio_multiwrite(void *mcb, int num_callbacks, int num_reqs) "mcb %p num_callbacks %d num_reqs %d"
52 disable bdrv_aio_multiwrite_earlyfail(void *mcb) "mcb %p"
53 disable bdrv_aio_multiwrite_latefail(void *mcb, int i) "mcb %p i %d"
54 disable bdrv_aio_readv(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
55 disable bdrv_aio_writev(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
58 disable virtio_blk_req_complete(void *req, int status) "req %p status %d"
59 disable virtio_blk_rw_complete(void *req, int ret) "req %p ret %d"
60 disable virtio_blk_handle_write(void *req, uint64_t sector, size_t nsectors) "req %p sector %"PRIu64" nsectors %zu"
63 disable paio_submit(void *acb, void *opaque, int64_t sector_num, int nb_sectors, int type) "acb %p opaque %p sector_num %"PRId64" nb_sectors %d type %d"
66 disable cpu_in(unsigned int addr, unsigned int val) "addr %#x value %u"
67 disable cpu_out(unsigned int addr, unsigned int val) "addr %#x value %u"
70 # Since requests are raised via monitor, not many tracepoints are needed.
71 disable balloon_event(void *opaque, unsigned long addr) "opaque %p addr %lu"