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Re: [Qemu-devel] [PATCH 4/6] migration: calculate downtime on dst side
From: |
Alexey |
Subject: |
Re: [Qemu-devel] [PATCH 4/6] migration: calculate downtime on dst side |
Date: |
Fri, 21 Apr 2017 21:47:27 +0300 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Hello, David!
I apologize, forgot to check patches with checkpatch.pl script, but now I
checked,
and I fixed code styles in patches, however I checked also files,
migration.c has code style errors and glib-compat.h too.
I could send that patches to qemu-trivial, if you not against.
On Fri, Apr 21, 2017 at 01:00:32PM +0100, Dr. David Alan Gilbert wrote:
> * Alexey Perevalov (address@hidden) wrote:
> > This patch provides downtime calculation per vCPU,
> > as a summary and as a overlapped value for all vCPUs.
> >
> > This approach just keeps tree with page fault addr as a key,
> > and t1-t2 interval of pagefault time and page copy time, with
> > affected vCPU bit mask.
> > For more implementation details please see comment to
> > get_postcopy_total_downtime function.
> >
> > Signed-off-by: Alexey Perevalov <address@hidden>
> > ---
> > include/migration/migration.h | 14 +++
> > migration/migration.c | 280
> > +++++++++++++++++++++++++++++++++++++++++-
> > migration/postcopy-ram.c | 24 +++-
> > migration/qemu-file.c | 1 -
> > migration/trace-events | 9 +-
> > 5 files changed, 323 insertions(+), 5 deletions(-)
> >
> > diff --git a/include/migration/migration.h b/include/migration/migration.h
> > index 5720c88..5d2c628 100644
> > --- a/include/migration/migration.h
> > +++ b/include/migration/migration.h
> > @@ -123,10 +123,24 @@ struct MigrationIncomingState {
> >
> > /* See savevm.c */
> > LoadStateEntry_Head loadvm_handlers;
> > +
> > + /*
> > + * Tree for keeping postcopy downtime,
> > + * necessary to calculate correct downtime, during multiple
> > + * vm suspends, it keeps host page address as a key and
> > + * DowntimeDuration as a data
> > + * NULL means kernel couldn't provide process thread id,
> > + * and QEMU couldn't identify which vCPU raise page fault
> > + */
> > + GTree *postcopy_downtime;
> > };
> >
> > MigrationIncomingState *migration_incoming_get_current(void);
> > void migration_incoming_state_destroy(void);
> > +void mark_postcopy_downtime_begin(uint64_t addr, int cpu);
> > +void mark_postcopy_downtime_end(uint64_t addr);
> > +uint64_t get_postcopy_total_downtime(void);
> > +void destroy_downtime_duration(gpointer data);
> >
> > /*
> > * An outstanding page request, on the source, having been received
> > diff --git a/migration/migration.c b/migration/migration.c
> > index 79f6425..5bac434 100644
> > --- a/migration/migration.c
> > +++ b/migration/migration.c
> > @@ -38,6 +38,8 @@
> > #include "io/channel-tls.h"
> > #include "migration/colo.h"
> >
> > +#define DEBUG_VCPU_DOWNTIME 1
> > +
> > #define MAX_THROTTLE (32 << 20) /* Migration transfer speed
> > throttling */
> >
> > /* Amount of time to allocate to each "chunk" of bandwidth-throttled
> > @@ -77,6 +79,19 @@ static NotifierList migration_state_notifiers =
> >
> > static bool deferred_incoming;
> >
> > +typedef struct {
> > + int64_t begin;
> > + int64_t end;
> > + uint64_t *cpus; /* cpus bit mask array, QEMU bit functions support
> > + bit operation on memory regions, but doesn't check out of range */
> > +} DowntimeDuration;
> > +
> > +typedef struct {
> > + int64_t tp; /* point in time */
> > + bool is_end;
> > + uint64_t *cpus;
> > +} OverlapDowntime;
> > +
> > /*
> > * Current state of incoming postcopy; note this is not part of
> > * MigrationIncomingState since it's state is used during cleanup
> > @@ -117,6 +132,13 @@ MigrationState *migrate_get_current(void)
> > return ¤t_migration;
> > }
> >
> > +void destroy_downtime_duration(gpointer data)
> > +{
> > + DowntimeDuration *dd = (DowntimeDuration *)data;
> > + g_free(dd->cpus);
> > + g_free(data);
> > +}
> > +
> > MigrationIncomingState *migration_incoming_get_current(void)
> > {
> > static bool once;
> > @@ -138,10 +160,13 @@ void migration_incoming_state_destroy(void)
> > struct MigrationIncomingState *mis = migration_incoming_get_current();
> >
> > qemu_event_destroy(&mis->main_thread_load_event);
> > + if (mis->postcopy_downtime) {
> > + g_tree_destroy(mis->postcopy_downtime);
> > + mis->postcopy_downtime = NULL;
> > + }
> > loadvm_free_handlers(mis);
> > }
> >
> > -
> > typedef struct {
> > bool optional;
> > uint32_t size;
> > @@ -1754,7 +1779,6 @@ static int postcopy_start(MigrationState *ms, bool
> > *old_vm_running)
> > */
> > ms->postcopy_after_devices = true;
> > notifier_list_notify(&migration_state_notifiers, ms);
> > -
>
> Stray deletion
>
> > ms->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - time_at_stop;
> >
> > qemu_mutex_unlock_iothread();
> > @@ -2117,3 +2141,255 @@ PostcopyState postcopy_state_set(PostcopyState
> > new_state)
> > return atomic_xchg(&incoming_postcopy_state, new_state);
> > }
> >
> > +#define SIZE_TO_KEEP_CPUBITS (1 + smp_cpus/sizeof(guint64))
>
> Split out your cpu-sets so that you have an 'alloc_cpu_set',
> a 'set bit' a 'set all bits', dup etc
> (I see Linux has cpumask.h that has a 'cpu_set' that's
> basically the same thing, but we need something portablish.)
>
> > +void mark_postcopy_downtime_begin(uint64_t addr, int cpu)
> > +{
> > + MigrationIncomingState *mis = migration_incoming_get_current();
> > + DowntimeDuration *dd;
> > + if (!mis->postcopy_downtime) {
> > + return;
> > + }
> > +
> > + dd = g_tree_lookup(mis->postcopy_downtime, (gpointer)addr); /* !!!
> > cast */
> > + if (!dd) {
> > + dd = (DowntimeDuration *)g_new0(DowntimeDuration, 1);
> > + dd->cpus = g_new0(guint64, SIZE_TO_KEEP_CPUBITS);
> > + g_tree_insert(mis->postcopy_downtime, (gpointer)addr,
> > (gpointer)dd);
> > + }
> > +
> > + if (cpu < 0) {
> > + /* assume in this situation all vCPUs are sleeping */
> > + int i;
> > + for (i = 0; i < SIZE_TO_KEEP_CPUBITS; i++) {
> > + dd->cpus[i] = ~(uint64_t)0u;
> > + }
> > + } else
> > + set_bit(cpu, dd->cpus);
>
> Qemu coding style: Use {}'s even on one line blocks
>
> > +
> > + /*
> > + * overwrite previously set dd->begin, if that page already was
> > + * faulted on another cpu
> > + */
> > + dd->begin = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
>
> OK, so this is making a decision that needs to be documented;
> that is that if one CPU was already paused at time (a), then a second
> CPU we see is paused at time (b), then the time we record only starts
> at (b) and ignores the time from a..b - is that the way you want to do it?
Yes, time interval when at least one of vCPU is running isn't counted.
> As I say, it should be documented somewhere; it's probably worth
> adding something to docs/migration.txt about how this measurement works.
>
>
> > + trace_mark_postcopy_downtime_begin(addr, dd, dd->begin, cpu);
> > +}
> > +
> > +void mark_postcopy_downtime_end(uint64_t addr)
> > +{
> > + MigrationIncomingState *mis = migration_incoming_get_current();
> > + DowntimeDuration *dd;
> > + if (!mis->postcopy_downtime) {
> > + return;
> > + }
> > +
> > + dd = g_tree_lookup(mis->postcopy_downtime, (gpointer)addr);
> > + if (!dd) {
> > + /* error_report("Could not populate downtime duration completion
> > time \n\
> > + There is no downtime duration for 0x%"PRIx64,
> > addr); */
>
> Error or no error - decide! Is this happening for pages that arrive before
> they've been requested?
>
> > + return;
> > + }
> > +
> > + dd->end = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
> > + trace_mark_postcopy_downtime_end(addr, dd, dd->end);
> > +}
> > +
> > +struct downtime_overlay_cxt {
> > + GPtrArray *downtime_points;
> > + size_t number_of_points;
> > +};
>
> Why 'cxt' ? If you mean as an abbreviation to context, then we normally use
> ctxt.
>
> > +/*
> > + * This function split each DowntimeDuration, which represents as start/end
> > + * pointand makes a points of it, then fill array with points,
> > + * to sort it in future.
> > + */
> > +static gboolean split_duration_and_fill_points(gpointer key, gpointer
> > value,
> > + gpointer data)
> > +{
> > + struct downtime_overlay_cxt *ctx = (struct downtime_overlay_cxt *)data;
> > + DowntimeDuration *dd = (DowntimeDuration *)value;
> > + GPtrArray *interval = ctx->downtime_points;
> > + if (dd->begin) {
> > + OverlapDowntime *od_begin = g_new0(OverlapDowntime, 1);
> > + od_begin->cpus = g_memdup(dd->cpus, sizeof(uint64_t) *
> > SIZE_TO_KEEP_CPUBITS);
> > + od_begin->tp = dd->begin;
> > + od_begin->is_end = false;
> > + g_ptr_array_add(interval, od_begin);
> > + ctx->number_of_points += 1;
> > + }
> > +
> > + if (dd->end) {
> > + OverlapDowntime *od_end = g_new0(OverlapDowntime, 1);
> > + od_end->cpus = g_memdup(dd->cpus, sizeof(uint64_t) *
> > SIZE_TO_KEEP_CPUBITS);
> > + od_end->tp = dd->end;
> > + od_end->is_end = true;
> > + g_ptr_array_add(interval, od_end);
> > + ctx->number_of_points += 1;
> > + }
> > +
> > + if (dd->end && dd->begin)
> > + trace_split_duration_and_fill_points(dd->end - dd->begin,
> > (uint64_t)key);
>
> again, need {}'s
>
> > + return FALSE;
> > +}
> > +
> > +#ifdef DEBUG_VCPU_DOWNTIME
> > +static gboolean calculate_per_cpu(gpointer key, gpointer value,
> > + gpointer data)
> > +{
> > + int *downtime_cpu = (int *)data;
> > + DowntimeDuration *dd = (DowntimeDuration *)value;
> > + int cpu_iter;
> > + for (cpu_iter = 0; cpu_iter < smp_cpus; cpu_iter++) {
> > + if (test_bit(cpu_iter, dd->cpus) && dd->end && dd->begin)
> > + downtime_cpu[cpu_iter] += dd->end - dd->begin;
> > + }
> > + return FALSE;
> > +}
> > +#endif /* DEBUG_VCPU_DOWNTIME */
> > +
> > +static gint compare_downtime(gconstpointer a, gconstpointer b)
> > +{
> > + DowntimeDuration *dda = (DowntimeDuration *)a;
> > + DowntimeDuration *ddb = (DowntimeDuration *)b;
> > + return dda->begin - ddb->begin;
> > +}
> > +
> > +static void destroy_overlap_downtime(gpointer data)
> > +{
> > + OverlapDowntime *od = (OverlapDowntime *)data;
> > + g_free(od->cpus);
> > + g_free(data);
> > +}
> > +
> > +static int check_overlap(uint64_t *b)
> > +{
> > + unsigned long zero_bit = find_first_zero_bit(b, BITS_PER_LONG *
> > SIZE_TO_KEEP_CPUBITS);
>
> Line's too long.
>
> > + return zero_bit >= smp_cpus;
>
> So this is really 'all cpus are blocked'?
yes, that condition for it
>
> > +}
> > +
> > +/*
> > + * This function calculates downtime per cpu and trace it
> > + *
> > + * Also it calculates total downtime as an interval's overlap,
> > + * for many vCPU.
> > + *
> > + * The approach is following:
> > + * Initially intervals are represented in tree where key is
> > + * pagefault address, and values:
> > + * begin - page fault time
> > + * end - page load time
> > + * cpus - bit mask shows affected cpus
> > + *
> > + * To calculate overlap on all cpus, intervals converted into
> > + * array of points in time (downtime_points), the size of
> > + * array is 2 * number of nodes in tree of intervals (2 array
> > + * elements per one in element of interval).
> > + * Each element is marked as end (E) or as start (S) of interval.
> > + * The overlap downtime will be calculated for SE, only in case
> > + * there is sequence S(0..N)E(M) for every vCPU.
> > + *
> > + * As example we have 3 CPU
> > + *
> > + * S1 E1 S1 E1
> > + * -----***********------------xxx***************------------------------>
> > CPU1
> > + *
> > + * S2 E2
> > + * ------------****************xxx--------------------------------------->
> > CPU2
> > + *
> > + * S3 E3
> > + * ------------------------****xxx********------------------------------->
> > CPU3
> > + *
> > + * We have sequence S1,S2,E1,S3,S1,E2,E3,E1
> > + * S2,E1 - doesn't match condition due to sequence S1,S2,E1 doesn't
> > include CPU3
> > + * S3,S1,E2 - sequenece includes all CPUs, in this case overlap will be
> > S1,E2
> ^ typo
>
> > + * Legend of picture is following: * - means downtime per vCPU
> > + * x - means overlapped downtime
> > + */
> > +uint64_t get_postcopy_total_downtime(void)
> > +{
> > + MigrationIncomingState *mis = migration_incoming_get_current();
> > + uint64_t total_downtime = 0; /* for total overlapped downtime */
> > + const int intervals = g_tree_nnodes(mis->postcopy_downtime);
> > + int point_iter, start_point_iter, i;
> > + struct downtime_overlay_cxt dp_ctx = { 0 };
> > + /*
> > + * array will contain 2 * interval points or less, if
> > + * it was not page fault finalization for page,
> > + * real count will be in ctx.number_of_points
> > + */
> > + dp_ctx.downtime_points = g_ptr_array_new_full(2 * intervals,
> > +
> > destroy_overlap_downtime);
>
> Is the g_ptr_array giving you anything here over a plain-old C array of
> pointers?
> You're not dynamically growing it.
Yes, I know upper bound of that array, at that time, and GPtrArray maybe
is little bit heavy structure here. Ok I'll use plain array.
>
> > + if (!mis->postcopy_downtime) {
> > + goto out;
> > + }
> > +
> > +#ifdef DEBUG_VCPU_DOWNTIME
> > + {
> > + gint *downtime_cpu = g_new0(int, smp_cpus);
> > + g_tree_foreach(mis->postcopy_downtime, calculate_per_cpu,
> > downtime_cpu);
> > + for (point_iter = 0; point_iter < smp_cpus; point_iter++)
> > + {
> > + trace_downtime_per_cpu(point_iter, downtime_cpu[point_iter]);
> > + }
> > + g_free(downtime_cpu);
> > + }
> > +#endif /* DEBUG_VCPU_DOWNTIME */
>
> You mgight want to make that:
> if (TRACE_DOWNTIME_PER_CPU_ENABLED) {
> }
>
> and remove the ifdef.
>
> > + /* make downtime points S/E from interval */
> > + g_tree_foreach(mis->postcopy_downtime, split_duration_and_fill_points,
> > + &dp_ctx);
> > + g_ptr_array_sort(dp_ctx.downtime_points, compare_downtime);
> > +
> > + for (point_iter = 1; point_iter < dp_ctx.number_of_points;
> > + point_iter++) {
> > + OverlapDowntime *od = g_ptr_array_index(dp_ctx.downtime_points,
> > + point_iter);
> > + uint64_t *cur_cpus;
> > + int smp_cpus_i = smp_cpus;
> > + OverlapDowntime *prev_od =
> > g_ptr_array_index(dp_ctx.downtime_points,
> > + point_iter - 1);
> > + if (!od || !prev_od)
> > + continue;
>
> Why would that happen?
Now cycle goes till dp_ctx.number_of_points, so in this version it looks
impossible.
>
> > + /* we need sequence SE */
> > + if (!od->is_end || prev_od->is_end)
> > + continue;
> > +
> > + cur_cpus = g_memdup(od->cpus, sizeof(uint64_t) *
> > SIZE_TO_KEEP_CPUBITS);
> > + for (start_point_iter = point_iter - 1;
> > + start_point_iter >= 0 && smp_cpus_i;
> > + start_point_iter--, smp_cpus_i--) {
>
> I think I see what you're doing in this loop, although it's a bit hairy;
> I don't think I understand why we needed to get prev_od if this loop is
> searching
> backwards?
Just for condition,
if (!od->is_end || prev_od->is_end) {
continue;
}
to skip any other sequences, like EE,
do you think following condition more readable?
!(od->is_end && !prev_od->is_end)
continue;
Also prev_od is nearest point to end, so time since that point to end
is interesting.
I depicted that.
>
> > + OverlapDowntime *t_od =
> > g_ptr_array_index(dp_ctx.downtime_points,
> > + start_point_iter);
> > + if (!t_od)
> > + break;
> > + /* should be S */
> > + if (t_od->is_end)
> > + break;
> > +
> > + /* points were sorted, it's possible when
> > + * end is not occured, but this points were ommited
> > + * in split_duration_and_fill_points */
> > + if (od->tp <= prev_od->tp) {
>
> Why is this checking od and prev_od in this loop - isn't this
> loop mainly t_od ?
right, that code shouldn't be here.
>
> > + break;
> > + }
> > +
> > + for (i = 0; i < SIZE_TO_KEEP_CPUBITS; i++) {
> > + cur_cpus[i] |= t_od->cpus[i];
> > + }
> > +
> > + /* check_overlap - just count number of bits in cur_cpus,
> > + * and compare it with smp_cpus */
> > + if (check_overlap(cur_cpus)) {
> > + total_downtime += od->tp - prev_od->tp;
> > + /* situation when one S point represents all vCPU is
> > possible */
> > + break;
> > + }
> > + }
> > + g_free(cur_cpus);
> > + }
> > +
> > trace_get_postcopy_total_downtime(g_tree_nnodes(mis->postcopy_downtime),
> > + total_downtime);
> > +out:
> > + g_ptr_array_free(dp_ctx.downtime_points, TRUE);
> > + return total_downtime;
> > +}
> > diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
> > index 70f0480..ea89f4e 100644
> > --- a/migration/postcopy-ram.c
> > +++ b/migration/postcopy-ram.c
> > @@ -23,8 +23,10 @@
> > #include "migration/postcopy-ram.h"
> > #include "sysemu/sysemu.h"
> > #include "sysemu/balloon.h"
> > +#include <sys/param.h>
> > #include "qemu/error-report.h"
> > #include "trace.h"
> > +#include "glib/glib-helper.h"
> >
> > /* Arbitrary limit on size of each discard command,
> > * keeps them around ~200 bytes
> > @@ -81,6 +83,11 @@ static bool ufd_version_check(int ufd,
> > MigrationIncomingState *mis)
> > return false;
> > }
> >
> > + if (mis && UFFD_FEATURE_THREAD_ID & api_struct.features) {
>
> That's a very weird way of writing that test! Also, I think you need
> to still make this user-selectable given the complexity/cost.
>
Like that?
{"execute": "migrate-set-capabilities" , "arguments":
{ "capabilities": [ { "capability": "calculate-postcopy-downtime", "state":
true } ]
} } ^^^^^^^^^^^^^^^^^^^^^^^^^^^
I tried to put heavy operations much after hot path (page requesting and
copying). The algorithm complexity is NumberOfPage*NumberOfvCPU, in case
of hugepages it's not so many.
Ok, if it's conditionally obtained from kernel, why not to give a user
ability to choose.
> > + mis->postcopy_downtime = g_tree_new_full(g_int_cmp64,
> > + NULL, NULL,
> > destroy_downtime_duration);
> > + }
> > +
> > if (getpagesize() != ram_pagesize_summary()) {
> > bool have_hp = false;
> > /* We've got a huge page */
> > @@ -404,6 +411,18 @@ static int ram_block_enable_notify(const char
> > *block_name, void *host_addr,
> > return 0;
> > }
> >
> > +static int get_mem_fault_cpu_index(uint32_t pid)
> > +{
> > + CPUState *cpu_iter;
> > +
> > + CPU_FOREACH(cpu_iter) {
> > + if (cpu_iter->thread_id == pid)
> > + return cpu_iter->cpu_index;
> > + }
> > + trace_get_mem_fault_cpu_index(pid);
> > + return -1;
> > +}
> > +
> > /*
> > * Handle faults detected by the USERFAULT markings
> > */
> > @@ -481,8 +500,10 @@ 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);
>
> Line length!
>
> >
> > + mark_postcopy_downtime_begin(msg.arg.pagefault.address,
> > +
> > get_mem_fault_cpu_index(msg.arg.pagefault.feat.ptid));
> > /*
> > * Send the request to the source - we want to request one
> > * of our host page sizes (which is >= TPS)
> > @@ -577,6 +598,7 @@ int postcopy_place_page(MigrationIncomingState *mis,
> > void *host, void *from,
> >
> > return -e;
> > }
> > + mark_postcopy_downtime_end((uint64_t)host);
> >
> > trace_postcopy_place_page(host);
> > return 0;
> > diff --git a/migration/qemu-file.c b/migration/qemu-file.c
> > index 195fa94..c9f3e47 100644
> > --- a/migration/qemu-file.c
> > +++ b/migration/qemu-file.c
> > @@ -547,7 +547,6 @@ size_t qemu_get_buffer_in_place(QEMUFile *f, uint8_t
> > **buf, size_t size)
> > int qemu_peek_byte(QEMUFile *f, int offset)
> > {
> > int index = f->buf_index + offset;
> > -
>
> Stray!
>
> > assert(!qemu_file_is_writable(f));
> > assert(offset < IO_BUF_SIZE);
> >
> > diff --git a/migration/trace-events b/migration/trace-events
> > index 7372ce2..ab2e1e4 100644
> > --- a/migration/trace-events
> > +++ b/migration/trace-events
> > @@ -110,6 +110,12 @@ 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_downtime_begin(uint64_t addr, void *dd, int64_t time, int
> > cpu) "addr 0x%" PRIx64 " dd %p time %" PRId64 " cpu %d"
> > +mark_postcopy_downtime_end(uint64_t addr, void *dd, int64_t time) "addr
> > 0x%" PRIx64 " dd %p time %" PRId64
> > +get_postcopy_total_downtime(int num, uint64_t total) "faults %d, total
> > downtime %" PRIu64
> > +split_duration_and_fill_points(int64_t downtime, uint64_t addr) "downtime
> > %" PRId64 " addr 0x%" PRIx64
> > +downtime_per_cpu(int cpu_index, int downtime) "downtime cpu[%d]=%d"
> > +source_return_path_thread_downtime(uint64_t downtime) "downtime %" PRIu64
> >
> > # migration/rdma.c
> > qemu_rdma_accept_incoming_migration(void) ""
> > @@ -186,7 +192,7 @@ 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, int pid) "Request for HVA=%" PRIx64 " rb=%s offset=%zx %d"
> > postcopy_ram_incoming_cleanup_closeuf(void) ""
> > postcopy_ram_incoming_cleanup_entry(void) ""
> > postcopy_ram_incoming_cleanup_exit(void) ""
> > @@ -195,6 +201,7 @@ 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
> >
>
> Dave
>
> --
> Dr. David Alan Gilbert / address@hidden / Manchester, UK
>
--
BR
Alexey
- Re: [Qemu-devel] [PATCH 3/6] migration: add UFFD_FEATURE_THREAD_ID feature support, (continued)
- Re: [Qemu-devel] [PATCH 3/6] migration: add UFFD_FEATURE_THREAD_ID feature support, Peter Xu, 2017/04/24
- Re: [Qemu-devel] [PATCH 3/6] migration: add UFFD_FEATURE_THREAD_ID feature support, Peter Xu, 2017/04/24
- Re: [Qemu-devel] [PATCH 3/6] migration: add UFFD_FEATURE_THREAD_ID feature support, Alexey, 2017/04/24
- Re: [Qemu-devel] [PATCH 3/6] migration: add UFFD_FEATURE_THREAD_ID feature support, Dr. David Alan Gilbert, 2017/04/24
- Re: [Qemu-devel] [PATCH 3/6] migration: add UFFD_FEATURE_THREAD_ID feature support, Alexey, 2017/04/25
Message not available
Message not available
Re: [Qemu-devel] [PATCH 4/6] migration: calculate downtime on dst side (CPUMASK), Alexey, 2017/04/22
Re: [Qemu-devel] [PATCH 4/6] migration: calculate downtime on dst side (CPUMASK), Dr. David Alan Gilbert, 2017/04/24
Re: [Qemu-devel] [PATCH 4/6] migration: calculate downtime on dst side, Peter Xu, 2017/04/25
Re: [Qemu-devel] [PATCH 4/6] migration: calculate downtime on dst side, Alexey Perevalov, 2017/04/25
Re: [Qemu-devel] [PATCH 4/6] migration: calculate downtime on dst side, Peter Xu, 2017/04/25
Re: [Qemu-devel] [PATCH 4/6] migration: calculate downtime on dst side, Alexey Perevalov, 2017/04/25
Re: [Qemu-devel] [PATCH 0/6] calculate downtime for postcopy live migration, no-reply, 2017/04/16
Re: [Qemu-devel] [PATCH 0/6] calculate downtime for postcopy live migration, no-reply, 2017/04/16