diff options
| author | Like Xu <like.xu@linux.intel.com> | 2019-06-20 13:45:25 +0800 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2019-07-05 17:08:04 -0300 |
| commit | 1b45842203540943b1e22fc30764456c035d8637 (patch) | |
| tree | 5cb644dd6a1e2db74af664f47a7c6b712d1c5fdf /hw | |
| parent | 6f479566a87d5087d6f3106b9401e6f53e933309 (diff) | |
vl.c: Add -smp, dies=* command line support and update doc
For PC target, users could configure the number of dies per one package
via command line with this patch, such as "-smp dies=2,cores=4".
The parsing rules of new cpu-topology model obey the same restrictions/logic
as the legacy socket/core/thread model especially on missing values computing.
Signed-off-by: Like Xu <like.xu@linux.intel.com>
Message-Id: <20190620054525.37188-4-like.xu@linux.intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/i386/pc.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 894084c4e1..b9c55301a2 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1540,9 +1540,12 @@ static void pc_new_cpu(PCMachineState *pcms, int64_t apic_id, Error **errp) */ void pc_smp_parse(MachineState *ms, QemuOpts *opts) { + PCMachineState *pcms = PC_MACHINE(ms); + if (opts) { unsigned cpus = qemu_opt_get_number(opts, "cpus", 0); unsigned sockets = qemu_opt_get_number(opts, "sockets", 0); + unsigned dies = qemu_opt_get_number(opts, "dies", 1); unsigned cores = qemu_opt_get_number(opts, "cores", 0); unsigned threads = qemu_opt_get_number(opts, "threads", 0); @@ -1552,24 +1555,24 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts) threads = threads > 0 ? threads : 1; if (cpus == 0) { sockets = sockets > 0 ? sockets : 1; - cpus = cores * threads * sockets; + cpus = cores * threads * dies * sockets; } else { ms->smp.max_cpus = qemu_opt_get_number(opts, "maxcpus", cpus); - sockets = ms->smp.max_cpus / (cores * threads); + sockets = ms->smp.max_cpus / (cores * threads * dies); } } else if (cores == 0) { threads = threads > 0 ? threads : 1; - cores = cpus / (sockets * threads); + cores = cpus / (sockets * dies * threads); cores = cores > 0 ? cores : 1; } else if (threads == 0) { - threads = cpus / (cores * sockets); + threads = cpus / (cores * dies * sockets); threads = threads > 0 ? threads : 1; - } else if (sockets * cores * threads < cpus) { + } else if (sockets * dies * cores * threads < cpus) { error_report("cpu topology: " - "sockets (%u) * cores (%u) * threads (%u) < " + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) < " "smp_cpus (%u)", - sockets, cores, threads, cpus); + sockets, dies, cores, threads, cpus); exit(1); } @@ -1581,26 +1584,27 @@ void pc_smp_parse(MachineState *ms, QemuOpts *opts) exit(1); } - if (sockets * cores * threads > ms->smp.max_cpus) { + if (sockets * dies * cores * threads > ms->smp.max_cpus) { error_report("cpu topology: " - "sockets (%u) * cores (%u) * threads (%u) > " + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) > " "maxcpus (%u)", - sockets, cores, threads, + sockets, dies, cores, threads, ms->smp.max_cpus); exit(1); } - if (sockets * cores * threads != ms->smp.max_cpus) { + if (sockets * dies * cores * threads != ms->smp.max_cpus) { warn_report("Invalid CPU topology deprecated: " - "sockets (%u) * cores (%u) * threads (%u) " + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) " "!= maxcpus (%u)", - sockets, cores, threads, + sockets, dies, cores, threads, ms->smp.max_cpus); } ms->smp.cpus = cpus; ms->smp.cores = cores; ms->smp.threads = threads; + pcms->smp_dies = dies; } if (ms->smp.cpus > 1) { |