From patchwork Mon Feb 4 10:40:38 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Tokarev X-Patchwork-Id: 217896 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 5ABB82C0297 for ; Mon, 4 Feb 2013 23:41:49 +1100 (EST) Received: from localhost ([::1]:58815 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U2JhX-0003BQ-PK for incoming@patchwork.ozlabs.org; Mon, 04 Feb 2013 05:55:03 -0500 Received: from eggs.gnu.org ([208.118.235.92]:54231) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U2JhM-0002uF-QA for qemu-devel@nongnu.org; Mon, 04 Feb 2013 05:54:54 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1U2JhJ-0004h9-5X for qemu-devel@nongnu.org; Mon, 04 Feb 2013 05:54:52 -0500 Received: from isrv.corpit.ru ([86.62.121.231]:32906) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U2JhI-0004gl-QE; Mon, 04 Feb 2013 05:54:49 -0500 Received: from gandalf.tls.msk.ru (mjt.vpn.tls.msk.ru [192.168.177.99]) by isrv.corpit.ru (Postfix) with ESMTP id 0961FA03FE; Mon, 4 Feb 2013 14:54:48 +0400 (MSK) Received: by gandalf.tls.msk.ru (Postfix, from userid 1000) id D648452F; Mon, 4 Feb 2013 14:41:27 +0400 (MSK) From: Michael Tokarev To: qemu-devel@nongnu.org Date: Mon, 4 Feb 2013 14:40:38 +0400 Message-Id: <1359974470-17044-29-git-send-email-mjt@msgid.tls.msk.ru> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1359974470-17044-1-git-send-email-mjt@msgid.tls.msk.ru> References: <1359974470-17044-1-git-send-email-mjt@msgid.tls.msk.ru> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 86.62.121.231 Cc: Blue Swirl , Michael Tokarev , Chegu Vinod , qemu-stable@nongnu.org Subject: [Qemu-devel] [PATCH 28/60] Fixes related to processing of qemu's -numa option X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Chegu Vinod The -numa option to qemu is used to create [fake] numa nodes and expose them to the guest OS instance. There are a couple of issues with the -numa option: a) Max VCPU's that can be specified for a guest while using the qemu's -numa option is 64. Due to a typecasting issue when the number of VCPUs is > 32 the VCPUs don't show up under the specified [fake] numa nodes. b) KVM currently has support for 160VCPUs per guest. The qemu's -numa option has only support for upto 64VCPUs per guest. This patch addresses these two issues. Below are examples of (a) and (b) a) >32 VCPUs are specified with the -numa option: /usr/local/bin/qemu-system-x86_64 \ -enable-kvm \ 71:01:01 \ -net tap,ifname=tap0,script=no,downscript=no \ -vnc :4 ... Upstream qemu : -------------- QEMU 1.1.50 monitor - type 'help' for more information (qemu) info numa 6 nodes node 0 cpus: 0 1 2 3 4 5 6 7 8 9 32 33 34 35 36 37 38 39 40 41 node 0 size: 131072 MB node 1 cpus: 10 11 12 13 14 15 16 17 18 19 42 43 44 45 46 47 48 49 50 51 node 1 size: 131072 MB node 2 cpus: 20 21 22 23 24 25 26 27 28 29 52 53 54 55 56 57 58 59 node 2 size: 131072 MB node 3 cpus: 30 node 3 size: 131072 MB node 4 cpus: node 4 size: 131072 MB node 5 cpus: 31 node 5 size: 131072 MB With the patch applied : ----------------------- QEMU 1.1.50 monitor - type 'help' for more information (qemu) info numa 6 nodes node 0 cpus: 0 1 2 3 4 5 6 7 8 9 node 0 size: 131072 MB node 1 cpus: 10 11 12 13 14 15 16 17 18 19 node 1 size: 131072 MB node 2 cpus: 20 21 22 23 24 25 26 27 28 29 node 2 size: 131072 MB node 3 cpus: 30 31 32 33 34 35 36 37 38 39 node 3 size: 131072 MB node 4 cpus: 40 41 42 43 44 45 46 47 48 49 node 4 size: 131072 MB node 5 cpus: 50 51 52 53 54 55 56 57 58 59 node 5 size: 131072 MB b) >64 VCPUs specified with -numa option: /usr/local/bin/qemu-system-x86_64 \ -enable-kvm \ -cpu Westmere,+rdtscp,+pdpe1gb,+dca,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pclmuldq,+pbe,+tm,+ht,+ss,+acpi,+d-vnc :4 ... Upstream qemu : -------------- only 63 CPUs in NUMA mode supported. only 64 CPUs in NUMA mode supported. QEMU 1.1.50 monitor - type 'help' for more information (qemu) info numa 8 nodes node 0 cpus: 6 7 8 9 38 39 40 41 70 71 72 73 node 0 size: 65536 MB node 1 cpus: 10 11 12 13 14 15 16 17 18 19 42 43 44 45 46 47 48 49 50 51 74 75 76 77 78 79 node 1 size: 65536 MB node 2 cpus: 20 21 22 23 24 25 26 27 28 29 52 53 54 55 56 57 58 59 60 61 node 2 size: 65536 MB node 3 cpus: 30 62 node 3 size: 65536 MB node 4 cpus: node 4 size: 65536 MB node 5 cpus: node 5 size: 65536 MB node 6 cpus: 31 63 node 6 size: 65536 MB node 7 cpus: 0 1 2 3 4 5 32 33 34 35 36 37 64 65 66 67 68 69 node 7 size: 65536 MB With the patch applied : ----------------------- QEMU 1.1.50 monitor - type 'help' for more information (qemu) info numa 8 nodes node 0 cpus: 0 1 2 3 4 5 6 7 8 9 node 0 size: 65536 MB node 1 cpus: 10 11 12 13 14 15 16 17 18 19 node 1 size: 65536 MB node 2 cpus: 20 21 22 23 24 25 26 27 28 29 node 2 size: 65536 MB node 3 cpus: 30 31 32 33 34 35 36 37 38 39 node 3 size: 65536 MB node 4 cpus: 40 41 42 43 44 45 46 47 48 49 node 4 size: 65536 MB node 5 cpus: 50 51 52 53 54 55 56 57 58 59 node 5 size: 65536 MB node 6 cpus: 60 61 62 63 64 65 66 67 68 69 node 6 size: 65536 MB node 7 cpus: 70 71 72 73 74 75 76 77 78 79 Signed-off-by: Chegu Vinod , Jim Hull , Craig Hada Tested-by: Eduardo Habkost Reviewed-by: Eduardo Habkost Signed-off-by: Blue Swirl (cherry picked from commit ee785fed5dd035d4b12142cacec6d3c344426dec) Signed-off-by: Michael Tokarev --- cpus.c | 3 ++- hw/pc.c | 3 ++- sysemu.h | 3 ++- vl.c | 43 +++++++++++++++++++++---------------------- 4 files changed, 27 insertions(+), 25 deletions(-) diff --git a/cpus.c b/cpus.c index b182b3d..acccd08 100644 --- a/cpus.c +++ b/cpus.c @@ -36,6 +36,7 @@ #include "cpus.h" #include "qtest.h" #include "main-loop.h" +#include "bitmap.h" #ifndef _WIN32 #include "compatfd.h" @@ -1145,7 +1146,7 @@ void set_numa_modes(void) for (env = first_cpu; env != NULL; env = env->next_cpu) { for (i = 0; i < nb_numa_nodes; i++) { - if (node_cpumask[i] & (1 << env->cpu_index)) { + if (test_bit(env->cpu_index, node_cpumask[i])) { env->numa_node = i; } } diff --git a/hw/pc.c b/hw/pc.c index 6c4b07b..2aa7551 100644 --- a/hw/pc.c +++ b/hw/pc.c @@ -48,6 +48,7 @@ #include "memory.h" #include "exec-memory.h" #include "arch_init.h" +#include "bitmap.h" /* output Bochs bios info messages */ //#define DEBUG_BIOS @@ -644,7 +645,7 @@ static void *bochs_bios_init(void) numa_fw_cfg[0] = cpu_to_le64(nb_numa_nodes); for (i = 0; i < max_cpus; i++) { for (j = 0; j < nb_numa_nodes; j++) { - if (node_cpumask[j] & (1 << i)) { + if (test_bit(i, node_cpumask[j])) { numa_fw_cfg[i + 1] = cpu_to_le64(j); break; } diff --git a/sysemu.h b/sysemu.h index bc2c788..2ce63fc 100644 --- a/sysemu.h +++ b/sysemu.h @@ -133,9 +133,10 @@ extern uint8_t qemu_extra_params_fw[2]; extern QEMUClock *rtc_clock; #define MAX_NODES 64 +#define MAX_CPUMASK_BITS 255 extern int nb_numa_nodes; extern uint64_t node_mem[MAX_NODES]; -extern uint64_t node_cpumask[MAX_NODES]; +extern unsigned long *node_cpumask[MAX_NODES]; #define MAX_OPTION_ROMS 16 typedef struct QEMUOptionRom { diff --git a/vl.c b/vl.c index 1dd4c6b..bbc0815 100644 --- a/vl.c +++ b/vl.c @@ -28,6 +28,7 @@ #include #include #include +#include "bitmap.h" /* Needed early for CONFIG_BSD etc. */ #include "config-host.h" @@ -246,7 +247,7 @@ QTAILQ_HEAD(, FWBootEntry) fw_boot_order = QTAILQ_HEAD_INITIALIZER(fw_boot_order int nb_numa_nodes; uint64_t node_mem[MAX_NODES]; -uint64_t node_cpumask[MAX_NODES]; +unsigned long *node_cpumask[MAX_NODES]; uint8_t qemu_uuid[16]; @@ -957,6 +958,8 @@ static void numa_add(const char *optarg) unsigned long long value, endvalue; int nodenr; + value = endvalue = 0ULL; + optarg = get_opt_name(option, 128, optarg, ',') + 1; if (!strcmp(option, "node")) { if (get_param_value(option, 128, "nodeid", optarg) == 0) { @@ -976,27 +979,22 @@ static void numa_add(const char *optarg) } node_mem[nodenr] = sval; } - if (get_param_value(option, 128, "cpus", optarg) == 0) { - node_cpumask[nodenr] = 0; - } else { + if (get_param_value(option, 128, "cpus", optarg) != 0) { value = strtoull(option, &endptr, 10); - if (value >= 64) { - value = 63; - fprintf(stderr, "only 64 CPUs in NUMA mode supported.\n"); + if (*endptr == '-') { + endvalue = strtoull(endptr+1, &endptr, 10); } else { - if (*endptr == '-') { - endvalue = strtoull(endptr+1, &endptr, 10); - if (endvalue >= 63) { - endvalue = 62; - fprintf(stderr, - "only 63 CPUs in NUMA mode supported.\n"); - } - value = (2ULL << endvalue) - (1ULL << value); - } else { - value = 1ULL << value; - } + endvalue = value; + } + + if (!(endvalue < MAX_CPUMASK_BITS)) { + endvalue = MAX_CPUMASK_BITS - 1; + fprintf(stderr, + "A max of %d CPUs are supported in a guest\n", + MAX_CPUMASK_BITS); } - node_cpumask[nodenr] = value; + + bitmap_set(node_cpumask[nodenr], value, endvalue-value+1); } nb_numa_nodes++; } @@ -2337,7 +2335,7 @@ int main(int argc, char **argv, char **envp) for (i = 0; i < MAX_NODES; i++) { node_mem[i] = 0; - node_cpumask[i] = 0; + node_cpumask[i] = bitmap_new(MAX_CPUMASK_BITS); } nb_numa_nodes = 0; @@ -3468,8 +3466,9 @@ int main(int argc, char **argv, char **envp) } for (i = 0; i < nb_numa_nodes; i++) { - if (node_cpumask[i] != 0) + if (!bitmap_empty(node_cpumask[i], MAX_CPUMASK_BITS)) { break; + } } /* assigning the VCPUs round-robin is easier to implement, guest OSes * must cope with this anyway, because there are BIOSes out there in @@ -3477,7 +3476,7 @@ int main(int argc, char **argv, char **envp) */ if (i == nb_numa_nodes) { for (i = 0; i < max_cpus; i++) { - node_cpumask[i % nb_numa_nodes] |= 1 << i; + set_bit(i, node_cpumask[i % nb_numa_nodes]); } } }