xemu/softmmu/trace-events
Daniel P. Berrangé 8af3f5c6d6 softmmu: add trace point when bdrv_flush_all fails
The VM stop process has to flush outstanding I/O and this is a critical
failure scenario that is hard to diagnose. Add a probe point that
records the flush return code.

Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00

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# See docs/devel/tracing.rst for syntax documentation.
# balloon.c
# Since requests are raised via monitor, not many tracepoints are needed.
balloon_event(void *opaque, unsigned long addr) "opaque %p addr %lu"
# ioport.c
cpu_in(unsigned int addr, char size, unsigned int val) "addr 0x%x(%c) value %u"
cpu_out(unsigned int addr, char size, unsigned int val) "addr 0x%x(%c) value %u"
# memory.c
memory_region_ops_read(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_ops_write(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_subpage_read(int cpu_index, void *mr, uint64_t offset, uint64_t value, unsigned size) "cpu %d mr %p offset 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_subpage_write(int cpu_index, void *mr, uint64_t offset, uint64_t value, unsigned size) "cpu %d mr %p offset 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_ram_device_read(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
memory_region_ram_device_write(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr 0x%"PRIx64" value 0x%"PRIx64" size %u"
flatview_new(void *view, void *root) "%p (root %p)"
flatview_destroy(void *view, void *root) "%p (root %p)"
flatview_destroy_rcu(void *view, void *root) "%p (root %p)"
# softmmu.c
vm_stop_flush_all(int ret) "ret %d"
# vl.c
vm_state_notify(int running, int reason, const char *reason_str) "running %d reason %d (%s)"
load_file(const char *name, const char *path) "name %s location %s"
runstate_set(int current_state, const char *current_state_str, int new_state, const char *new_state_str) "current_run_state %d (%s) new_state %d (%s)"
system_wakeup_request(int reason) "reason=%d"
qemu_system_shutdown_request(int reason) "reason=%d"
qemu_system_powerdown_request(void) ""