diff options
| author | Peter Xu <peterx@redhat.com> | 2023-10-30 12:33:46 -0400 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2023-11-01 16:13:58 +0100 |
| commit | 3e5f3bcdc281fed483b5bbe72050b63d4b41abf5 (patch) | |
| tree | 29643efd1429ad039579ebf036bdc34614112bc7 /migration/trace-events | |
| parent | 93bdf888fa5c1b3972e337c8c8fbe7d2bcd29900 (diff) | |
migration: Add tracepoints for downtime checkpoints
This patch is inspired by Joao Martin's patch here:
https://lore.kernel.org/r/20230926161841.98464-1-joao.m.martins@oracle.com
Add tracepoints for major downtime checkpoints on both src and dst. They
share the same tracepoint with a string showing its stage.
Besides the checkpoints in the previous patch, this patch also added
destination checkpoints.
On src, we have these checkpoints added:
- src-downtime-start: right before vm stops on src
- src-vm-stopped: after vm is fully stopped
- src-iterable-saved: after all iterables saved (END sections)
- src-non-iterable-saved: after all non-iterable saved (FULL sections)
- src-downtime-stop: migration fully completed
On dst, we have these checkpoints added:
- dst-precopy-loadvm-completes: after loadvm all done for precopy
- dst-precopy-bh-*: record BH steps to resume VM for precopy
- dst-postcopy-bh-*: record BH steps to resume VM for postcopy
On dst side, we don't have a good way to trace total time consumed by
iterable or non-iterable for now. We can mark it by 1st time receiving a
FULL / END section, but rather than that let's just rely on the other
tracepoints added for vmstates to back up the information.
With this patch, one can enable "vmstate_downtime*" tracepoints and it'll
enable all tracepoints for downtime measurements necessary.
Drop loadvm_postcopy_handle_run_bh() tracepoint alongside, because they
service the same purpose, which was only for postcopy. We then have
unified prefix for all downtime relevant tracepoints.
Co-developed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231030163346.765724-6-peterx@redhat.com>
Diffstat (limited to 'migration/trace-events')
| -rw-r--r-- | migration/trace-events | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/migration/trace-events b/migration/trace-events index 5820add1f3..e54f317e3b 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -17,7 +17,6 @@ loadvm_handle_recv_bitmap(char *s) "%s" loadvm_postcopy_handle_advise(void) "" loadvm_postcopy_handle_listen(const char *str) "%s" loadvm_postcopy_handle_run(void) "" -loadvm_postcopy_handle_run_bh(const char *str) "%s" loadvm_postcopy_handle_resume(void) "" loadvm_postcopy_ram_handle_discard(void) "" loadvm_postcopy_ram_handle_discard_end(void) "" @@ -50,6 +49,7 @@ vmstate_save(const char *idstr, const char *vmsd_name) "%s, %s" vmstate_load(const char *idstr, const char *vmsd_name) "%s, %s" vmstate_downtime_save(const char *type, const char *idstr, uint32_t instance_id, int64_t downtime) "type=%s idstr=%s instance_id=%d downtime=%"PRIi64 vmstate_downtime_load(const char *type, const char *idstr, uint32_t instance_id, int64_t downtime) "type=%s idstr=%s instance_id=%d downtime=%"PRIi64 +vmstate_downtime_checkpoint(const char *checkpoint) "%s" postcopy_pause_incoming(void) "" postcopy_pause_incoming_continued(void) "" postcopy_page_req_sync(void *host_addr) "sync page req %p" |