Re: [libvirt] [PATCH 5/5] virsh: Introduce --best-effort to domstats

This new switch can be used to set VIR_CONNECT_GET_ALL_DOMAINS_STATS_BEST_EFFORT flag for stats fetching API.

Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- tools/virsh-domain-monitor.c | 7 +++++++ tools/virsh.pod | 16 +++++++++++----- 2 files changed, 18 insertions(+), 5 deletions(-) diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c index 8cbb3db37c..96a65a8ac7 100644 --- a/tools/virsh-domain-monitor.c +++ b/tools/virsh-domain-monitor.c @@ -1992,6 +1992,10 @@ static const vshCmdOptDef opts_domstats[] = { .type = VSH_OT_BOOL, .help = N_("add backing chain information to block stats"), }, + {.name = "best-effort", + .type = VSH_OT_BOOL, + .help = N_("ignore stalled domains"), + }, VIRSH_COMMON_OPT_DOMAIN_OT_ARGV(N_("list of domains to get stats for"), 0), {.name = NULL} }; @@ -2087,6 +2091,9 @@ cmdDomstats(vshControl *ctl, const vshCmd *cmd) if (vshCommandOptBool(cmd, "backing")) flags |= VIR_CONNECT_GET_ALL_DOMAINS_STATS_BACKING; + if (vshCommandOptBool(cmd, "best-effort")) + flags |= VIR_CONNECT_GET_ALL_DOMAINS_STATS_BEST_EFFORT; + if (vshCommandOptBool(cmd, "domain")) { if (VIR_ALLOC_N(domlist, 1) < 0) goto cleanup; diff --git a/tools/virsh.pod b/tools/virsh.pod index 3f3314a87e..8f3bc67405 100644 --- a/tools/virsh.pod +++ b/tools/virsh.pod @@ -968,11 +968,11 @@ that require a block device name (such as I<domblkinfo> or I<snapshot-create> for disk snapshots) will accept either target or unique source names printed by this command. -=item B<domstats> [I<--raw>] [I<--enforce>] [I<--backing>] [I<--state>] -[I<--cpu-total>] [I<--balloon>] [I<--vcpu>] [I<--interface>] [I<--block>] -[I<--perf>] [[I<--list-active>] [I<--list-inactive>] [I<--list-persistent>] -[I<--list-transient>] [I<--list-running>] [I<--list-paused>] -[I<--list-shutoff>] [I<--list-other>]] | [I<domain> ...] +=item B<domstats> [I<--raw>] [I<--enforce>] [I<--backing>] [I<--best-effort>] +[I<--state>] [I<--cpu-total>] [I<--balloon>] [I<--vcpu>] [I<--interface>] +[I<--block>] [I<--perf>] [[I<--list-active>] [I<--list-inactive>] +[I<--list-persistent>] [I<--list-transient>] [I<--list-running>] +[I<--list-paused>] [I<--list-shutoff>] [I<--list-other>]] | [I<domain> ...] Get statistics for multiple or all domains. Without any argument this command prints all available statistics for all domains. @@ -1123,6 +1123,12 @@ daemon supports the selected group of stats. Flag I<--enforce> forces the command to fail if the daemon doesn't support the selected group. +When collecting stats libvirtd may wait for some time if there's +already another job running on given domain for it to finish. +This may cause unnecessary delay in delivering stats. Using +I<--best-effort> suppresses this behaviour. On the other hand +some statistics might be missing for such domain. +

=item B<domiflist> I<domain> [I<--inactive>] Print a table showing the brief information of all virtual interfaces