+ atomic_xchg__nocheck(&dc->last_begin, now_ms);
+ atomic_xchg__nocheck(&dc->page_fault_vcpu_time[cpu], now_ms);
+
+ trace_mark_postcopy_blocktime_begin(addr, dc,
dc->page_fault_vcpu_time[cpu],
+ cpu);
+}
+
+static void mark_postcopy_blocktime_end(uint64_t addr)
+{
+ MigrationIncomingState *mis = migration_incoming_get_current();
+ PostcopyBlocktimeContext *dc = mis->blocktime_ctx;
+ int i, affected_cpu = 0;
+ int64_t now_ms;
+ bool vcpu_total_blocktime = false;
+ unsigned long int nr_bit;
+
+ if (!dc) {
+ return;
+ }
+ /* mark that page as copied */
+ nr_bit = get_copied_bit_offset(addr);
+ set_bit_atomic(nr_bit, mis->copied_pages);
+
+ now_ms = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
+
+ /* lookup cpu, to clear it,
+ * that algorithm looks straighforward, but it's not
+ * optimal, more optimal algorithm is keeping tree or hash
+ * where key is address value is a list of */
+ for (i = 0; i < smp_cpus; i++) {
+ uint64_t vcpu_blocktime = 0;
+ if (atomic_fetch_add(&dc->vcpu_addr[i], 0) != addr) {
+ continue;
+ }
+ atomic_xchg__nocheck(&dc->vcpu_addr[i], 0);
+ vcpu_blocktime = now_ms -
+ atomic_fetch_add(&dc->page_fault_vcpu_time[i], 0);
+ affected_cpu += 1;
+ /* we need to know is that mark_postcopy_end was due to
+ * faulted page, another possible case it's prefetched
+ * page and in that case we shouldn't be here */
+ if (!vcpu_total_blocktime &&
+ atomic_fetch_add(&dc->smp_cpus_down, 0) == smp_cpus) {
+ vcpu_total_blocktime = true;
+ }
+ /* continue cycle, due to one page could affect several vCPUs */
+ dc->vcpu_blocktime[i] += vcpu_blocktime;
+ }
+
+ atomic_sub(&dc->smp_cpus_down, affected_cpu);
+ if (vcpu_total_blocktime) {
+ dc->total_blocktime += now_ms - atomic_fetch_add(&dc->last_begin, 0);
+ }
+ trace_mark_postcopy_blocktime_end(addr, dc, dc->total_blocktime);
+}
+
/*
* Handle faults detected by the USERFAULT markings
*/
@@ -654,8 +750,11 @@ static void *postcopy_ram_fault_thread(void *opaque)
rb_offset &= ~(qemu_ram_pagesize(rb) - 1);
trace_postcopy_ram_fault_thread_request(msg.arg.pagefault.address,
qemu_ram_get_idstr(rb),
- rb_offset);
+ rb_offset,
+ msg.arg.pagefault.feat.ptid);
+ mark_postcopy_blocktime_begin((uintptr_t)(msg.arg.pagefault.address),
+ msg.arg.pagefault.feat.ptid, rb);
/*
* Send the request to the source - we want to request one
* of our host page sizes (which is >= TPS)
@@ -750,6 +849,7 @@ int postcopy_place_page(MigrationIncomingState *mis, void
*host, void *from,
return -e;
}
+ mark_postcopy_blocktime_end((uint64_t)(uintptr_t)host);
trace_postcopy_place_page(host);
return 0;
diff --git a/migration/trace-events b/migration/trace-events
index 5b8ccf3..7bdadbb 100644
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -112,6 +112,8 @@ process_incoming_migration_co_end(int ret, int ps) "ret=%d
postcopy-state=%d"
process_incoming_migration_co_postcopy_end_main(void) ""
migration_set_incoming_channel(void *ioc, const char *ioctype) "ioc=%p
ioctype=%s"
migration_set_outgoing_channel(void *ioc, const char *ioctype, const char *hostname)
"ioc=%p ioctype=%s hostname=%s"
+mark_postcopy_blocktime_begin(uint64_t addr, void *dd, int64_t time, int cpu) "addr 0x%" PRIx64
" dd %p time %" PRId64 " cpu %d"
+mark_postcopy_blocktime_end(uint64_t addr, void *dd, int64_t time) "addr 0x%" PRIx64
" dd %p time %" PRId64
# migration/rdma.c
qemu_rdma_accept_incoming_migration(void) ""
@@ -188,7 +190,7 @@ postcopy_ram_enable_notify(void) ""
postcopy_ram_fault_thread_entry(void) ""
postcopy_ram_fault_thread_exit(void) ""
postcopy_ram_fault_thread_quit(void) ""
-postcopy_ram_fault_thread_request(uint64_t hostaddr, const char *ramblock, size_t offset)
"Request for HVA=%" PRIx64 " rb=%s offset=%zx"
+postcopy_ram_fault_thread_request(uint64_t hostaddr, const char *ramblock, size_t offset, uint32_t
pid) "Request for HVA=%" PRIx64 " rb=%s offset=%zx %u"
postcopy_ram_incoming_cleanup_closeuf(void) ""
postcopy_ram_incoming_cleanup_entry(void) ""
postcopy_ram_incoming_cleanup_exit(void) ""
@@ -197,6 +199,7 @@ save_xbzrle_page_skipping(void) ""
save_xbzrle_page_overflow(void) ""
ram_save_iterate_big_wait(uint64_t milliconds, int iterations) "big wait: %" PRIu64
" milliseconds, %d iterations"
ram_load_complete(int ret, uint64_t seq_iter) "exit_code %d seq iteration %"
PRIu64
+get_mem_fault_cpu_index(uint32_t pid) "pid %u is not vCPU"
# migration/exec.c
migration_exec_outgoing(const char *cmd) "cmd=%s"
--
1.8.3.1