@@ -105,6 +105,7 @@ enum ovs_datapath_attr {
OVS_DP_ATTR_MEGAFLOW_STATS, /* struct ovs_dp_megaflow_stats */
OVS_DP_ATTR_USER_FEATURES, /* OVS_DP_F_* */
OVS_DP_ATTR_PAD,
+ OVS_DP_ATTR_MASKS_CACHE_SIZE,
__OVS_DP_ATTR_MAX
};
@@ -591,6 +591,36 @@ compare_port_nos(const void *a_, const void *b_)
return a < b ? -1 : a > b;
}
+static void
+show_dpif_cache__(struct dpif *dpif, struct dpctl_params *dpctl_p)
+{
+ uint32_t nr_caches;
+ int error = dpif_cache_get_supported_levels(dpif, &nr_caches);
+
+ if (error || nr_caches == 0) {
+ return;
+ }
+
+ dpctl_print(dpctl_p, " caches:\n");
+ for (int i = 0; i < nr_caches; i++) {
+ const char *name;
+ uint32_t size;
+
+ if (dpif_cache_get_name(dpif, i, &name) ||
+ dpif_cache_get_size(dpif, i, &size)) {
+ continue;
+ }
+ dpctl_print(dpctl_p, " %s: size: %u\n", name, size);
+ }
+}
+
+static void
+show_dpif_cache(struct dpif *dpif, struct dpctl_params *dpctl_p)
+{
+ dpctl_print(dpctl_p, "%s:\n", dpif_name(dpif));
+ show_dpif_cache__(dpif, dpctl_p);
+}
+
static void
show_dpif(struct dpif *dpif, struct dpctl_params *dpctl_p)
{
@@ -623,6 +653,8 @@ show_dpif(struct dpif *dpif, struct dpctl_params *dpctl_p)
}
}
+ show_dpif_cache__(dpif, dpctl_p);
+
odp_port_t *port_nos = NULL;
size_t allocated_port_nos = 0, n_port_nos = 0;
DPIF_PORT_FOR_EACH (&dpif_port, &dump, dpif) {
@@ -2409,6 +2441,92 @@ dpctl_ct_ipf_get_status(int argc, const char *argv[],
return error;
}
+static int
+dpctl_cache_get_size(int argc, const char *argv[],
+ struct dpctl_params *dpctl_p)
+{
+ int error;
+
+ if (argc > 1) {
+ struct dpif *dpif;
+
+ error = parsed_dpif_open(argv[1], false, &dpif);
+ if (!error) {
+ show_dpif_cache(dpif, dpctl_p);
+ dpif_close(dpif);
+ } else {
+ dpctl_error(dpctl_p, error, "Opening datapath %s failed", argv[1]);
+ }
+ } else {
+ error = dps_for_each(dpctl_p, show_dpif_cache);
+ }
+
+ return error;
+}
+
+static int
+dpctl_cache_set_size(int argc, const char *argv[],
+ struct dpctl_params *dpctl_p)
+{
+ int i, error = EINVAL;
+ uint32_t nr_caches, size;
+ struct dpif *dpif;
+
+ if (argc != 4) {
+ dpctl_error(dpctl_p, error, "Invalid number of arguments");
+ return error;
+ }
+
+ if (!ovs_scan(argv[3], "%"SCNu32, &size)) {
+ dpctl_error(dpctl_p, error, "size is malformed");
+ return error;
+ }
+
+ error = parsed_dpif_open(argv[1], false, &dpif);
+ if (error) {
+ dpctl_error(dpctl_p, error, "Opening datapath %s failed",
+ argv[1]);
+ return error;
+ }
+
+ error = dpif_cache_get_supported_levels(dpif, &nr_caches);
+ if (error || nr_caches == 0) {
+ dpctl_error(dpctl_p, error, "Setting caches not supported");
+ goto exit;
+ }
+
+ for (i = 0; i < nr_caches; i++) {
+ const char *name;
+
+ if (dpif_cache_get_name(dpif, i, &name)) {
+ continue;
+ }
+ if (!strcmp(argv[2], name)) {
+ break;
+ }
+ }
+
+ if (i == nr_caches) {
+ error = EINVAL;
+ dpctl_error(dpctl_p, error, "Cache name \"%s\" not found on dpif",
+ argv[2]);
+ goto exit;
+ }
+
+ error = dpif_cache_set_size(dpif, i, size);
+ if (!error) {
+ dpif_cache_get_size(dpif, i, &size);
+ dpctl_print(dpctl_p, "Setting cache size successful, new size %u\n",
+ size);
+ } else {
+ dpctl_error(dpctl_p, error, "Setting cache size failed");
+ }
+
+exit:
+ dpif_close(dpif);
+ return error;
+}
+
/* Undocumented commands for unit testing. */
static int
@@ -2710,6 +2828,8 @@ static const struct dpctl_command all_commands[] = {
0, 4, dpctl_dump_conntrack, DP_RO },
{ "flush-conntrack", "[dp] [zone=N] [ct-tuple]", 0, 3,
dpctl_flush_conntrack, DP_RW },
+ { "cache-get-size", "[dp]", 0, 1, dpctl_cache_get_size, DP_RO },
+ { "cache-set-size", "dp cache <size>", 3, 3, dpctl_cache_set_size, DP_RW },
{ "ct-stats-show", "[dp] [zone=N]",
0, 3, dpctl_ct_stats_show, DP_RO },
{ "ct-bkts", "[dp] [gt=N]", 0, 2, dpctl_ct_bkts, DP_RO },
@@ -226,6 +226,20 @@ Fetches the flow from \fIdp\fR's flow table with unique identifier \fIufid\fR.
.
.IP "\*(DX\fBdel\-flows\fR [\fIdp\fR]"
Deletes all flow entries from datapath \fIdp\fR's flow table.
+.SS "DATAPATH FLOW CACHE COMMANDS"
+The following commands are useful for debugging and configuring
+the datapath flow cache settings.
+.
+.TP
+\*(DX\fBcache\-get\-size\fR [\fIdp\fR]
+Prints the current cache setting to the console.
+.
+.TP
+\*(DX\fBcache\-set\-size\fR \fIdp\fR \fIcache\fR \fIsize\fR
+Set the \fIdp\fR's specific \fIcache\fR to the given \fIsize\fR.
+The cache name can be found by using the \fBcache\-get\-size\fR
+command.
+.
.SS "CONNECTION TRACKING TABLE COMMANDS"
The following commands are useful for debugging and configuring
the connection tracking table in the datapath.
@@ -8531,6 +8531,10 @@ const struct dpif_class dpif_netdev_class = {
dpif_netdev_bond_add,
dpif_netdev_bond_del,
dpif_netdev_bond_stats_get,
+ NULL, /* cache_get_supported_levels */
+ NULL, /* cache_get_name */
+ NULL, /* cache_get_size */
+ NULL, /* cache_set_size */
};
static void
@@ -95,6 +95,7 @@ struct dpif_netlink_dp {
const char *name; /* OVS_DP_ATTR_NAME. */
const uint32_t *upcall_pid; /* OVS_DP_ATTR_UPCALL_PID. */
uint32_t user_features; /* OVS_DP_ATTR_USER_FEATURES */
+ uint32_t cache_size; /* OVS_DP_ATTR_MASKS_CACHE_SIZE */
const struct ovs_dp_stats *stats; /* OVS_DP_ATTR_STATS. */
const struct ovs_dp_megaflow_stats *megaflow_stats;
/* OVS_DP_ATTR_MEGAFLOW_STATS.*/
@@ -3953,6 +3954,104 @@ probe_broken_meters(struct dpif *dpif)
}
return broken_meters;
}
+
+
+static int
+dpif_netlink_cache_get_supported_levels(struct dpif *dpif_, uint32_t *levels)
+{
+ int error;
+ struct ofpbuf *buf;
+ struct dpif_netlink_dp dp;
+
+ /* If available, in the kernel we support one level of cache.
+ * Unfortunately, there is no way to detect if the older kernel module has
+ * the cache feature. For now, we only report the cache information if the
+ * kernel module reports the OVS_DP_ATTR_MASKS_CACHE_SIZE attribute. */
+
+ *levels = 0;
+ error = dpif_netlink_dp_get(dpif_, &dp, &buf);
+ if (!error) {
+
+ if (dp.cache_size != UINT32_MAX) {
+ *levels = 1;
+ }
+ ofpbuf_delete(buf);
+ }
+
+ return error;
+}
+
+static int
+dpif_netlink_cache_get_name(struct dpif *dpif_ OVS_UNUSED, uint32_t level,
+ const char **name)
+{
+ if (level != 0) {
+ return EINVAL;
+ }
+
+ *name = "masks-cache";
+ return 0;
+}
+
+static int
+dpif_netlink_cache_get_size(struct dpif *dpif_, uint32_t level, uint32_t *size)
+{
+ int error;
+ struct ofpbuf *buf;
+ struct dpif_netlink_dp dp;
+
+ if (level != 0) {
+ return EINVAL;
+ }
+
+ error = dpif_netlink_dp_get(dpif_, &dp, &buf);
+ if (!error) {
+
+ ofpbuf_delete(buf);
+
+ if (dp.cache_size == UINT32_MAX) {
+ return EOPNOTSUPP;
+ }
+ *size = dp.cache_size;
+ }
+ return error;
+}
+
+static int
+dpif_netlink_cache_set_size(struct dpif *dpif_, uint32_t level, uint32_t size)
+{
+ int error;
+ struct ofpbuf *bufp;
+ struct dpif_netlink_dp request, reply;
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ size = ROUND_UP_POW2(size);
+
+ if (level != 0) {
+ return EINVAL;
+ }
+
+ dpif_netlink_dp_init(&request);
+ request.cmd = OVS_DP_CMD_SET;
+ request.name = dpif_->base_name;
+ request.dp_ifindex = dpif->dp_ifindex;
+ request.cache_size = size;
+ /* We need to set the dpif user_features, as the kernel module assumes the
+ * OVS_DP_ATTR_USER_FEATURES attribute is always present. If not, it will
+ * reset all the features. */
+ request.user_features = dpif->user_features;
+
+ error = dpif_netlink_dp_transact(&request, &reply, &bufp);
+ if (!error) {
+ ofpbuf_delete(bufp);
+ if (reply.cache_size != size) {
+ return EINVAL;
+ }
+ }
+
+ return error;
+}
+
const struct dpif_class dpif_netlink_class = {
"system",
@@ -4030,6 +4129,10 @@ const struct dpif_class dpif_netlink_class = {
NULL, /* bond_add */
NULL, /* bond_del */
NULL, /* bond_stats_get */
+ dpif_netlink_cache_get_supported_levels,
+ dpif_netlink_cache_get_name,
+ dpif_netlink_cache_get_size,
+ dpif_netlink_cache_set_size,
};
static int
@@ -4290,6 +4393,9 @@ dpif_netlink_dp_from_ofpbuf(struct dpif_netlink_dp *dp, const struct ofpbuf *buf
[OVS_DP_ATTR_USER_FEATURES] = {
.type = NL_A_U32,
.optional = true },
+ [OVS_DP_ATTR_MASKS_CACHE_SIZE] = {
+ .type = NL_A_U32,
+ .optional = true },
};
dpif_netlink_dp_init(dp);
@@ -4322,6 +4428,12 @@ dpif_netlink_dp_from_ofpbuf(struct dpif_netlink_dp *dp, const struct ofpbuf *buf
dp->user_features = nl_attr_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
}
+ if (a[OVS_DP_ATTR_MASKS_CACHE_SIZE]) {
+ dp->cache_size = nl_attr_get_u32(a[OVS_DP_ATTR_MASKS_CACHE_SIZE]);
+ } else {
+ dp->cache_size = UINT32_MAX;
+ }
+
return 0;
}
@@ -4350,6 +4462,10 @@ dpif_netlink_dp_to_ofpbuf(const struct dpif_netlink_dp *dp, struct ofpbuf *buf)
nl_msg_put_u32(buf, OVS_DP_ATTR_USER_FEATURES, dp->user_features);
}
+ if (dp->cache_size != UINT32_MAX) {
+ nl_msg_put_u32(buf, OVS_DP_ATTR_MASKS_CACHE_SIZE, dp->cache_size);
+ }
+
/* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */
}
@@ -4358,6 +4474,7 @@ static void
dpif_netlink_dp_init(struct dpif_netlink_dp *dp)
{
memset(dp, 0, sizeof *dp);
+ dp->cache_size = UINT32_MAX;
}
static void
@@ -628,6 +628,26 @@ struct dpif_class {
* sufficient to store BOND_BUCKETS number of elements. */
int (*bond_stats_get)(struct dpif *dpif, uint32_t bond_id,
uint64_t *n_bytes);
+
+ /* Cache configuration
+ *
+ * Multiple levels of cache can exist in a given datapath implementation.
+ * An API has been provided to get the number of supported caches, which
+ * can then be used to get/set specific configuration. Cache level is 0
+ * indexed, i.e. if 1 level is supported, the level value to use is 0.
+ *
+ * Get the number of cache levels supported. */
+ int (*cache_get_supported_levels)(struct dpif *dpif, uint32_t *levels);
+
+ /* Get the cache name for the given level. */
+ int (*cache_get_name)(struct dpif *dpif, uint32_t level,
+ const char **name);
+
+ /* Get currently configured cache size. */
+ int (*cache_get_size)(struct dpif *dpif, uint32_t level, uint32_t *size);
+
+ /* Set cache size. */
+ int (*cache_set_size)(struct dpif *dpif, uint32_t level, uint32_t size);
};
extern const struct dpif_class dpif_netlink_class;
@@ -2042,3 +2042,35 @@ dpif_get_n_offloaded_flows(struct dpif *dpif, uint64_t *n_flows)
}
return n_devs ? 0 : EOPNOTSUPP;
}
+
+int
+dpif_cache_get_supported_levels(struct dpif *dpif, uint32_t *levels)
+{
+ return dpif->dpif_class->cache_get_supported_levels
+ ? dpif->dpif_class->cache_get_supported_levels(dpif, levels)
+ : EOPNOTSUPP;
+}
+
+int
+dpif_cache_get_name(struct dpif *dpif, uint32_t level, const char **name)
+{
+ return dpif->dpif_class->cache_get_name
+ ? dpif->dpif_class->cache_get_name(dpif, level, name)
+ : EOPNOTSUPP;
+}
+
+int
+dpif_cache_get_size(struct dpif *dpif, uint32_t level, uint32_t *size)
+{
+ return dpif->dpif_class->cache_get_size
+ ? dpif->dpif_class->cache_get_size(dpif, level, size)
+ : EOPNOTSUPP;
+}
+
+int
+dpif_cache_set_size(struct dpif *dpif, uint32_t level, uint32_t size)
+{
+ return dpif->dpif_class->cache_set_size
+ ? dpif->dpif_class->cache_set_size(dpif, level, size)
+ : EOPNOTSUPP;
+}
@@ -907,6 +907,13 @@ int dpif_bond_del(struct dpif *, uint32_t bond_id);
int dpif_bond_stats_get(struct dpif *, uint32_t bond_id, uint64_t *n_bytes);
bool dpif_supports_lb_output_action(const struct dpif *);
+
+/* Cache */
+int dpif_cache_get_supported_levels(struct dpif *dpif, uint32_t *levels);
+int dpif_cache_get_name(struct dpif *dpif, uint32_t level, const char **name);
+int dpif_cache_get_size(struct dpif *dpif, uint32_t level, uint32_t *size);
+int dpif_cache_set_size(struct dpif *dpif, uint32_t level, uint32_t size);
+
/* Miscellaneous. */
@@ -1400,6 +1400,42 @@ AT_CHECK([ovs-ofctl dump-flows br0 | grep "in_port=4" | ofctl_strip], [0], [dnl
OVS_TRAFFIC_VSWITCHD_STOP
AT_CLEANUP
+AT_SETUP([datapath - configure cache size])
+
+OVS_TRAFFIC_VSWITCHD_START()
+OVS_CHECK_KERNEL_EXCL(3, 10, 5, 8)
+
+AT_CHECK([ovs-dpctl cache-get-size one-bad-dp], [1], [], [dnl
+ovs-dpctl: Opening datapath one-bad-dp failed (No such device)
+])
+AT_CHECK([ovs-dpctl cache-get-size | grep masks-cache | tr -d [[:blank:]]], [0], [dnl
+masks-cache:size:256
+])
+AT_CHECK([ovs-dpctl cache-set-size one-bad-dp masks-cache 0], [1], [], [dnl
+ovs-dpctl: Opening datapath one-bad-dp failed (No such device)
+])
+AT_CHECK([ovs-dpctl cache-set-size system@ovs-system dummy-cache 0], [1], [], [dnl
+ovs-dpctl: Cache name "dummy-cache" not found on dpif (Invalid argument)
+])
+AT_CHECK([ovs-dpctl cache-set-size system@ovs-system masks-cache 80000], [1], [], [dnl
+ovs-dpctl: Setting cache size failed (Numerical result out of range)
+])
+AT_CHECK([ovs-dpctl cache-set-size system@ovs-system masks-cache 0], [0], [dnl
+Setting cache size successful, new size 0
+])
+AT_CHECK([ovs-dpctl cache-get-size | grep masks-cache | tr -d [[:blank:]]], [0], [dnl
+masks-cache:size:0
+])
+AT_CHECK([ovs-dpctl cache-set-size system@ovs-system masks-cache 256], [0], [dnl
+Setting cache size successful, new size 256
+])
+AT_CHECK([ovs-dpctl cache-get-size | grep masks-cache | tr -d [[:blank:]]], [0], [dnl
+masks-cache:size:256
+])
+
+OVS_TRAFFIC_VSWITCHD_STOP
+AT_CLEANUP
+
AT_BANNER([conntrack])
AT_SETUP([conntrack - controller])
@@ -198,6 +198,10 @@ usage(void *userdata OVS_UNUSED)
" del-flow [DP] FLOW delete FLOW from DP\n"
" del-flows [DP] [FILE] " \
"delete all or specified flows from DP\n"
+ " cache-get-size [DP] " \
+ "Show the current size for all caches\n"
+ " cache-set-size DP CACHE SIZE " \
+ "Set cache size for a specific cache\n"
" dump-conntrack [DP] [zone=ZONE] " \
"display conntrack entries for ZONE\n"
" flush-conntrack [DP] [zone=ZONE] [ct-tuple]" \
This patch adds a general way of viewing/configuring datapath cache sizes. With an implementation for the netlink interface. The ovs-dpctl/ovs-appctl show commands will display the current cache sizes configured: ovs-dpctl show system@ovs-system: lookups: hit:25 missed:63 lost:0 flows: 0 masks: hit:282 total:0 hit/pkt:3.20 cache: hit:4 hit rate:4.54% caches: masks-cache: size: 256 port 0: ovs-system (internal) port 1: br-int (internal) port 2: genev_sys_6081 (geneve: packet_type=ptap) port 3: br-ex (internal) port 4: eth2 port 5: sw0p1 (internal) port 6: sw0p3 (internal) A specific cache can be configured as follows: ovs-appctl dpctl/cache-set-size DP CACHE SIZE ovs-dpctl cache-set-size DP CACHE SIZE For example to disable the cache do: $ ovs-dpctl cache-set-size system@ovs-system masks-cache 0 Setting cache size successful, new size 0. Signed-off-by: Eelco Chaudron <echaudro@redhat.com> --- v2: - Changed precision to 2 digits - Handle missing kernel feature at netlink level v3: - Rebase on the latest master branch v4: - Fixed commit message - Fix issue with resetting user_features v5: - Include the actual resetting user_features fix datapath/linux/compat/include/linux/openvswitch.h | 1 lib/dpctl.c | 120 +++++++++++++++++++++ lib/dpctl.man | 14 ++ lib/dpif-netdev.c | 4 + lib/dpif-netlink.c | 117 ++++++++++++++++++++ lib/dpif-provider.h | 20 ++++ lib/dpif.c | 32 ++++++ lib/dpif.h | 7 + tests/system-traffic.at | 36 ++++++ utilities/ovs-dpctl.c | 4 + 10 files changed, 355 insertions(+)