[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 3/4] tools: xenpm: continue to support {set, get}-vcpu-migration-delay
Now that it is possible to get and set the migration delay via the SCHEDOP sysctl, use that in xenpm, instead of the special purpose libxc interface (which will be removed in a following commit). The sysctl, however, requires a cpupool-id argument, for knowing on which scheduler it is operating on. In this case, since we don't want to alter xenpm's command line interface, we always use '0', which means xenpm will always act on the default cpupool ('Pool-0'). >From this commit on, `xenpm {set,get}-vcpu-migration-delay' commands work again. But that is only for the sake of backward compatibility, and their use is deprecated, in favour of 'xl sched-credit -s [-c <poolid>] -m <delay>'. Signed-off-by: Dario Faggioli <dfaggioli@xxxxxxxx> Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx> --- Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx> Cc: Wei Liu <wei.liu2@xxxxxxxxxx> Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> --- Changes from v2: * send the warning to stderr, rather than to stdout. --- tools/misc/xenpm.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) diff --git a/tools/misc/xenpm.c b/tools/misc/xenpm.c index 762311e5a5..0e1968a23d 100644 --- a/tools/misc/xenpm.c +++ b/tools/misc/xenpm.c @@ -1071,14 +1071,24 @@ void set_sched_smt_func(int argc, char *argv[]) void set_vcpu_migration_delay_func(int argc, char *argv[]) { + struct xen_sysctl_credit_schedule sparam; int value; + fprintf(stderr, "WARNING: using xenpm for this purpose is deprecated." + " Check out `xl sched-credit -s -m DELAY'\n"); + if ( argc != 1 || (value = atoi(argv[0])) < 0 ) { fprintf(stderr, "Missing or invalid argument(s)\n"); exit(EINVAL); } - if ( !xc_set_vcpu_migration_delay(xc_handle, value) ) + if ( xc_sched_credit_params_get(xc_handle, 0, &sparam) < 0 ) { + fprintf(stderr, "getting Credit scheduler parameters failed\n"); + exit(EINVAL); + } + sparam.vcpu_migr_delay_us = value; + + if ( !xc_sched_credit_params_set(xc_handle, 0, &sparam) ) printf("set vcpu migration delay to %d us succeeded\n", value); else fprintf(stderr, "set vcpu migration delay failed (%d - %s)\n", @@ -1087,13 +1097,17 @@ void set_vcpu_migration_delay_func(int argc, char *argv[]) void get_vcpu_migration_delay_func(int argc, char *argv[]) { - uint32_t value; + struct xen_sysctl_credit_schedule sparam; + + fprintf(stderr, "WARNING: using xenpm for this purpose is deprecated." + " Check out `xl sched-credit -s'\n"); if ( argc ) fprintf(stderr, "Ignoring argument(s)\n"); - if ( !xc_get_vcpu_migration_delay(xc_handle, &value) ) - printf("Scheduler vcpu migration delay is %d us\n", value); + if ( !xc_sched_credit_params_get(xc_handle, 0, &sparam) ) + printf("Scheduler vcpu migration delay is %d us\n", + sparam.vcpu_migr_delay_us); else fprintf(stderr, "Failed to get scheduler vcpu migration delay (%d - %s)\n", _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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