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From: | Kirti Wankhede |
Subject: | Re: [PATCH v27 17/17] qapi: Add VFIO devices migration stats in Migration stats |
Date: | Fri, 23 Oct 2020 15:51:13 +0530 |
User-agent: | Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Thunderbird/68.12.1 |
On 10/23/2020 3:48 AM, Alex Williamson wrote:
On Thu, 22 Oct 2020 16:42:07 +0530 Kirti Wankhede <kwankhede@nvidia.com> wrote:Added amount of bytes transferred to the VM at destination by all VFIO devices Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> --- hw/vfio/common.c | 20 ++++++++++++++++++++ hw/vfio/migration.c | 10 ++++++++++ include/qemu/vfio-helpers.h | 3 +++ migration/migration.c | 14 ++++++++++++++ monitor/hmp-cmds.c | 6 ++++++ qapi/migration.json | 17 +++++++++++++++++ 6 files changed, 70 insertions(+) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 9c879e5c0f62..8d0758eda9fa 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -39,6 +39,7 @@ #include "trace.h" #include "qapi/error.h" #include "migration/migration.h" +#include "qemu/vfio-helpers.h"VFIOGroupList vfio_group_list =QLIST_HEAD_INITIALIZER(vfio_group_list); @@ -292,6 +293,25 @@ const MemoryRegionOps vfio_region_ops = { * Device state interfaces */+bool vfio_mig_active(void)+{ + VFIOGroup *group; + VFIODevice *vbasedev; + + if (QLIST_EMPTY(&vfio_group_list)) { + return false; + } + + QLIST_FOREACH(group, &vfio_group_list, next) { + QLIST_FOREACH(vbasedev, &group->device_list, next) { + if (vbasedev->migration_blocker) { + return false; + } + } + } + return true; +} + static bool vfio_devices_all_stopped_and_saving(VFIOContainer *container) { VFIOGroup *group; diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 77ee60a43ea5..b23e21c6de2b 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -28,6 +28,7 @@ #include "pci.h" #include "trace.h" #include "hw/hw.h" +#include "qemu/vfio-helpers.h"/** Flags to be used as unique delimiters for VFIO devices in the migration @@ -45,6 +46,8 @@ #define VFIO_MIG_FLAG_DEV_SETUP_STATE (0xffffffffef100003ULL) #define VFIO_MIG_FLAG_DEV_DATA_STATE (0xffffffffef100004ULL)+static int64_t bytes_transferred;+ static inline int vfio_mig_access(VFIODevice *vbasedev, void *val, int count, off_t off, bool iswrite) { @@ -255,6 +258,7 @@ static int vfio_save_buffer(QEMUFile *f, VFIODevice *vbasedev, uint64_t *size) *size = data_size; }+ bytes_transferred += data_size;return ret; }@@ -776,6 +780,7 @@ static void vfio_migration_state_notifier(Notifier *notifier, void *data)case MIGRATION_STATUS_CANCELLING: case MIGRATION_STATUS_CANCELLED: case MIGRATION_STATUS_FAILED: + bytes_transferred = 0; ret = vfio_migration_set_state(vbasedev, ~(VFIO_DEVICE_STATE_SAVING | VFIO_DEVICE_STATE_RESUMING), VFIO_DEVICE_STATE_RUNNING); @@ -862,6 +867,11 @@ err:/* ---------------------------------------------------------------------- */ +int64_t vfio_mig_bytes_transferred(void)+{ + return bytes_transferred; +} + int vfio_migration_probe(VFIODevice *vbasedev, Error **errp) { VFIOContainer *container = vbasedev->group->container; diff --git a/include/qemu/vfio-helpers.h b/include/qemu/vfio-helpers.h index 4491c8e1a6e9..7f7a46e6ef2d 100644 --- a/include/qemu/vfio-helpers.h +++ b/include/qemu/vfio-helpers.h @@ -29,4 +29,7 @@ void qemu_vfio_pci_unmap_bar(QEMUVFIOState *s, int index, void *bar, int qemu_vfio_pci_init_irq(QEMUVFIOState *s, EventNotifier *e, int irq_type, Error **errp);+bool vfio_mig_active(void);+int64_t vfio_mig_bytes_transferred(void); + #endifI don't think vfio-helpers is the right place for this, this header is specifically for using util/vfio-helpers.c. Would include/hw/vfio/vfio-common.h work?
Yes, works with CONFIG_VFIO check. Changing it.
diff --git a/migration/migration.c b/migration/migration.c index 0575ecb37953..8b2865d25ef4 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -56,6 +56,7 @@ #include "net/announce.h" #include "qemu/queue.h" #include "multifd.h" +#include "qemu/vfio-helpers.h"#define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */ @@ -1002,6 +1003,17 @@ static void populate_disk_info(MigrationInfo *info)} }+static void populate_vfio_info(MigrationInfo *info)+{ +#ifdef CONFIG_LINUXUse CONFIG_VFIO? I get a build failure on qemu-system-avr /usr/bin/ld: /tmp/tmp.3QbqxgbENl/build/../migration/migration.c:1012: undefined reference to `vfio_mig_bytes_transferred'. Thanks,
Ok Changing it.
Alex+ if (vfio_mig_active()) { + info->has_vfio = true; + info->vfio = g_malloc0(sizeof(*info->vfio)); + info->vfio->transferred = vfio_mig_bytes_transferred(); + } +#endif +} + static void fill_source_migration_info(MigrationInfo *info) { MigrationState *s = migrate_get_current(); @@ -1026,6 +1038,7 @@ static void fill_source_migration_info(MigrationInfo *info) populate_time_info(info, s); populate_ram_info(info, s); populate_disk_info(info); + populate_vfio_info(info); break; case MIGRATION_STATUS_COLO: info->has_status = true; @@ -1034,6 +1047,7 @@ static void fill_source_migration_info(MigrationInfo *info) case MIGRATION_STATUS_COMPLETED: populate_time_info(info, s); populate_ram_info(info, s); + populate_vfio_info(info); break; case MIGRATION_STATUS_FAILED: info->has_status = true; diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index 9789f4277f50..56e9bad33d94 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -357,6 +357,12 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict) } monitor_printf(mon, "]\n"); } + + if (info->has_vfio) { + monitor_printf(mon, "vfio device transferred: %" PRIu64 " kbytes\n", + info->vfio->transferred >> 10); + } + qapi_free_MigrationInfo(info); }diff --git a/qapi/migration.json b/qapi/migration.jsonindex a5da513c9e05..3c7582052725 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -147,6 +147,18 @@ 'active', 'postcopy-active', 'postcopy-paused', 'postcopy-recover', 'completed', 'failed', 'colo', 'pre-switchover', 'device', 'wait-unplug' ] } +## +# @VfioStats: +# +# Detailed VFIO devices migration statistics +# +# @transferred: amount of bytes transferred to the target VM by VFIO devices +# +# Since: 5.2 +# +## +{ 'struct': 'VfioStats', + 'data': {'transferred': 'int' } }### @MigrationInfo: @@ -208,11 +220,16 @@ # # @socket-address: Only used for tcp, to know what the real port is (Since 4.0) # +# @vfio: @VfioStats containing detailed VFIO devices migration statistics, +# only returned if VFIO device is present, migration is supported by all +# VFIO devices and status is 'active' or 'completed' (since 5.2) +# # Since: 0.14.0 ## { 'struct': 'MigrationInfo', 'data': {'*status': 'MigrationStatus', '*ram': 'MigrationStats', '*disk': 'MigrationStats', + '*vfio': 'VfioStats', '*xbzrle-cache': 'XBZRLECacheStats', '*total-time': 'int', '*expected-downtime': 'int',
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