--- /dev/null
+/*
+ * perfmon.c - skeleton vpp engine plug-in
+ *
+ * Copyright (c) <current-year> <your-organization>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/vnet.h>
+#include <perfmon/perfmon.h>
+#include <perfmon/perfmon_intel.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vpp/app/version.h>
+#include <linux/limits.h>
+
+perfmon_main_t perfmon_main;
+
+void
+perfmon_register_intel_pmc (perfmon_intel_pmc_cpu_model_t * m, int n_models,
+ perfmon_intel_pmc_event_t * e, int n_events)
+{
+ perfmon_main_t *pm = &perfmon_main;
+ perfmon_intel_pmc_registration_t r;
+
+ r.events = e;
+ r.models = m;
+ r.n_events = n_events;
+ r.n_models = n_models;
+
+ vec_add1 (pm->perfmon_tables, r);
+}
+
+static inline u32
+get_cpuid (void)
+{
+#if defined(__x86_64__)
+ u32 cpuid;
+ asm volatile ("mov $1, %%eax; cpuid; mov %%eax, %0":"=r" (cpuid)::"%eax",
+ "%edx", "%ecx", "%rbx");
+ return cpuid;
+#else
+ return 0;
+#endif
+}
+
+static int
+perfmon_cpu_model_matches (perfmon_intel_pmc_cpu_model_t * mt,
+ u32 n_models, u8 model, u8 stepping)
+{
+ u32 i;
+ for (i = 0; i < n_models; i++)
+ {
+ if (mt[i].model != model)
+ continue;
+
+ if (mt[i].has_stepping)
+ {
+ if (mt[i].stepping != stepping)
+ continue;
+ }
+
+ return 1;
+ }
+ return 0;
+}
+
+static perfmon_intel_pmc_event_t *
+perfmon_find_table_by_model_stepping (perfmon_main_t * pm,
+ u8 model, u8 stepping)
+{
+ perfmon_intel_pmc_registration_t *rt;
+
+ vec_foreach (rt, pm->perfmon_tables)
+ {
+ if (perfmon_cpu_model_matches (rt->models, rt->n_models, model, stepping))
+ return rt->events;
+ }
+ return 0;
+}
+
+static clib_error_t *
+perfmon_init (vlib_main_t * vm)
+{
+ perfmon_main_t *pm = &perfmon_main;
+ clib_error_t *error = 0;
+ u32 cpuid;
+ u8 model, stepping;
+ perfmon_intel_pmc_event_t *ev;
+ int i;
+
+ pm->vlib_main = vm;
+ pm->vnet_main = vnet_get_main ();
+
+ pm->capture_by_thread_and_node_name =
+ hash_create_string (0, sizeof (uword));
+
+ pm->log_class = vlib_log_register_class ("perfmon", 0);
+
+ /* Default data collection interval */
+ pm->timeout_interval = 2.0; /* seconds */
+
+ vec_validate (pm->threads, vlib_get_thread_main ()->n_vlib_mains - 1);
+ for (i = 0; i < vec_len (pm->threads); i++)
+ {
+ perfmon_thread_t *pt = clib_mem_alloc_aligned
+ (sizeof (perfmon_thread_t), CLIB_CACHE_LINE_BYTES);
+ clib_memset (pt, 0, sizeof (*pt));
+ pm->threads[i] = pt;
+ pt->pm_fds[0] = -1;
+ pt->pm_fds[1] = -1;
+ }
+ pm->page_size = getpagesize ();
+
+ pm->perfmon_table = 0;
+ pm->pmc_event_by_name = 0;
+
+ cpuid = get_cpuid ();
+ model = ((cpuid >> 12) & 0xf0) | ((cpuid >> 4) & 0xf);
+ stepping = cpuid & 0xf;
+
+ pm->perfmon_table = perfmon_find_table_by_model_stepping (pm,
+ model, stepping);
+
+ if (pm->perfmon_table == 0)
+ {
+ vlib_log_err (pm->log_class, "No table for cpuid %x", cpuid);
+ vlib_log_err (pm->log_class, " model %x, stepping %x",
+ model, stepping);
+ }
+ else
+ {
+ pm->pmc_event_by_name = hash_create_string (0, sizeof (u32));
+ ev = pm->perfmon_table;
+
+ for (; ev->event_name; ev++)
+ {
+ hash_set_mem (pm->pmc_event_by_name, ev->event_name,
+ ev - pm->perfmon_table);
+ }
+ }
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (perfmon_init);
+
+uword
+unformat_processor_event (unformat_input_t * input, va_list * args)
+{
+ perfmon_main_t *pm = va_arg (*args, perfmon_main_t *);
+ perfmon_event_config_t *ep = va_arg (*args, perfmon_event_config_t *);
+ u8 *s = 0;
+ hash_pair_t *hp;
+ u32 idx;
+ u32 pe_config = 0;
+
+ if (pm->perfmon_table == 0 || pm->pmc_event_by_name == 0)
+ return 0;
+
+ if (!unformat (input, "%s", &s))
+ return 0;
+
+ hp = hash_get_pair_mem (pm->pmc_event_by_name, s);
+
+ vec_free (s);
+
+ if (hp == 0)
+ return 0;
+
+ idx = (u32) (hp->value[0]);
+
+ pe_config |= pm->perfmon_table[idx].event_code[0];
+ pe_config |= pm->perfmon_table[idx].umask << 8;
+ pe_config |= pm->perfmon_table[idx].edge << 18;
+ pe_config |= pm->perfmon_table[idx].anyt << 21;
+ pe_config |= pm->perfmon_table[idx].inv << 23;
+ pe_config |= pm->perfmon_table[idx].cmask << 24;
+
+ ep->name = (char *) hp->key;
+ ep->pe_type = PERF_TYPE_RAW;
+ ep->pe_config = pe_config;
+ return 1;
+}
+
+static clib_error_t *
+set_pmc_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ perfmon_main_t *pm = &perfmon_main;
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ int num_threads = 1 + vtm->n_threads;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ perfmon_event_config_t ec;
+ f64 delay;
+ u32 timeout_seconds;
+ u32 deadman;
+ int last_set;
+ clib_error_t *error;
+
+ vec_reset_length (pm->single_events_to_collect);
+ vec_reset_length (pm->paired_events_to_collect);
+ pm->ipc_event_index = ~0;
+ pm->mispredict_event_index = ~0;
+
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return clib_error_return (0, "counter names required...");
+
+ clib_bitmap_zero (pm->thread_bitmap);
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "timeout %u", &timeout_seconds))
+ pm->timeout_interval = (f64) timeout_seconds;
+ else if (unformat (line_input, "instructions-per-clock"))
+ {
+ ec.name = "instructions";
+ ec.pe_type = PERF_TYPE_HARDWARE;
+ ec.pe_config = PERF_COUNT_HW_INSTRUCTIONS;
+ pm->ipc_event_index = vec_len (pm->paired_events_to_collect);
+ vec_add1 (pm->paired_events_to_collect, ec);
+ ec.name = "cpu-cycles";
+ ec.pe_type = PERF_TYPE_HARDWARE;
+ ec.pe_config = PERF_COUNT_HW_CPU_CYCLES;
+ vec_add1 (pm->paired_events_to_collect, ec);
+ }
+ else if (unformat (line_input, "branch-mispredict-rate"))
+ {
+ ec.name = "branch-misses";
+ ec.pe_type = PERF_TYPE_HARDWARE;
+ ec.pe_config = PERF_COUNT_HW_BRANCH_MISSES;
+ pm->mispredict_event_index = vec_len (pm->paired_events_to_collect);
+ vec_add1 (pm->paired_events_to_collect, ec);
+ ec.name = "branches";
+ ec.pe_type = PERF_TYPE_HARDWARE;
+ ec.pe_config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
+ vec_add1 (pm->paired_events_to_collect, ec);
+ }
+ else if (unformat (line_input, "threads %U",
+ unformat_bitmap_list, &pm->thread_bitmap))
+ ;
+ else if (unformat (line_input, "thread %U",
+ unformat_bitmap_list, &pm->thread_bitmap))
+ ;
+ else if (unformat (line_input, "%U", unformat_processor_event, pm, &ec))
+ {
+ vec_add1 (pm->single_events_to_collect, ec);
+ }
+#define _(type,event,str) \
+ else if (unformat (line_input, str)) \
+ { \
+ ec.name = str; \
+ ec.pe_type = type; \
+ ec.pe_config = event; \
+ vec_add1 (pm->single_events_to_collect, ec); \
+ }
+ foreach_perfmon_event
+#undef _
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ unformat_free (line_input);
+ return error;
+ }
+ }
+
+ unformat_free (line_input);
+
+ last_set = clib_bitmap_last_set (pm->thread_bitmap);
+ if (last_set != ~0 && last_set >= num_threads)
+ return clib_error_return (0, "thread %d does not exist", last_set);
+
+ /* Stick paired events at the front of the (unified) list */
+ if (vec_len (pm->paired_events_to_collect) > 0)
+ {
+ perfmon_event_config_t *tmp;
+ /* first 2n events are pairs... */
+ vec_append (pm->paired_events_to_collect, pm->single_events_to_collect);
+ tmp = pm->single_events_to_collect;
+ pm->single_events_to_collect = pm->paired_events_to_collect;
+ pm->paired_events_to_collect = tmp;
+ }
+
+ if (vec_len (pm->single_events_to_collect) == 0)
+ return clib_error_return (0, "no events specified...");
+
+ /* Figure out how long data collection will take */
+ delay =
+ ((f64) vec_len (pm->single_events_to_collect)) * pm->timeout_interval;
+ delay /= 2.0; /* collect 2 stats at once */
+
+ vlib_cli_output (vm, "Start collection for %d events, wait %.2f seconds",
+ vec_len (pm->single_events_to_collect), delay);
+
+ vlib_process_signal_event (pm->vlib_main, perfmon_periodic_node.index,
+ PERFMON_START, 0);
+
+ /* Coarse-grained wait */
+ vlib_process_suspend (vm, delay);
+
+ deadman = 0;
+ /* Reasonable to guess that collection may not be quite done... */
+ while (pm->state == PERFMON_STATE_RUNNING)
+ {
+ vlib_process_suspend (vm, 10e-3);
+ if (deadman++ > 200)
+ {
+ vlib_cli_output (vm, "DEADMAN: collection still running...");
+ break;
+ }
+ }
+
+ vlib_cli_output (vm, "Data collection complete...");
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_pmc_command, static) =
+{
+ .path = "set pmc",
+ .short_help = "set pmc [threads n,n1-n2] c1... [see \"show pmc events\"]",
+ .function = set_pmc_command_fn,
+ .is_mp_safe = 1,
+};
+/* *INDENT-ON* */
+
+static int
+capture_name_sort (void *a1, void *a2)
+{
+ perfmon_capture_t *c1 = a1;
+ perfmon_capture_t *c2 = a2;
+
+ return strcmp ((char *) c1->thread_and_node_name,
+ (char *) c2->thread_and_node_name);
+}
+
+static u8 *
+format_capture (u8 * s, va_list * args)
+{
+ perfmon_main_t *pm = va_arg (*args, perfmon_main_t *);
+ perfmon_capture_t *c = va_arg (*args, perfmon_capture_t *);
+ int verbose __attribute__ ((unused)) = va_arg (*args, int);
+ f64 ticks_per_pkt;
+ int i;
+
+ if (c == 0)
+ {
+ s = format (s, "%=40s%=20s%=16s%=16s%=16s",
+ "Name", "Counter", "Count", "Pkts", "Counts/Pkt");
+ return s;
+ }
+
+ for (i = 0; i < vec_len (c->counter_names); i++)
+ {
+ u8 *name;
+
+ if (i == 0)
+ name = c->thread_and_node_name;
+ else
+ {
+ vec_add1 (s, '\n');
+ name = (u8 *) "";
+ }
+
+ /* Deal with synthetic events right here */
+ if (i == pm->ipc_event_index)
+ {
+ f64 ipc_rate;
+ ASSERT ((i + 1) < vec_len (c->counter_names));
+
+ if (c->counter_values[i + 1] > 0)
+ ipc_rate = (f64) c->counter_values[i]
+ / (f64) c->counter_values[i + 1];
+ else
+ ipc_rate = 0.0;
+
+ s = format (s, "%-40s%+20s%+16llu%+16llu%+16.2e\n",
+ name, "instructions-per-clock",
+ c->counter_values[i],
+ c->counter_values[i + 1], ipc_rate);
+ name = (u8 *) "";
+ }
+
+ if (i == pm->mispredict_event_index)
+ {
+ f64 mispredict_rate;
+ ASSERT (i + 1 < vec_len (c->counter_names));
+
+ if (c->counter_values[i + 1] > 0)
+ mispredict_rate = (f64) c->counter_values[i]
+ / (f64) c->counter_values[i + 1];
+ else
+ mispredict_rate = 0.0;
+
+ s = format (s, "%-40s%+20s%+16llu%+16llu%+16.2e\n",
+ name, "branch-mispredict-rate",
+ c->counter_values[i],
+ c->counter_values[i + 1], mispredict_rate);
+ name = (u8 *) "";
+ }
+
+ if (c->vectors_this_counter[i])
+ ticks_per_pkt =
+ ((f64) c->counter_values[i]) / ((f64) c->vectors_this_counter[i]);
+ else
+ ticks_per_pkt = 0.0;
+
+ s = format (s, "%-40s%+20s%+16llu%+16llu%+16.2e",
+ name, c->counter_names[i],
+ c->counter_values[i],
+ c->vectors_this_counter[i], ticks_per_pkt);
+ }
+ return s;
+}
+
+static u8 *
+format_generic_events (u8 * s, va_list * args)
+{
+ int verbose = va_arg (*args, int);
+
+#define _(type,config,name) \
+ if (verbose == 0) \
+ s = format (s, "\n %s", name); \
+ else \
+ s = format (s, "\n %s (%d, %d)", name, type, config);
+ foreach_perfmon_event;
+#undef _
+ return s;
+}
+
+typedef struct
+{
+ u8 *name;
+ u32 index;
+} sort_nvp_t;
+
+static int
+sort_nvps_by_name (void *a1, void *a2)
+{
+ sort_nvp_t *nvp1 = a1;
+ sort_nvp_t *nvp2 = a2;
+
+ return strcmp ((char *) nvp1->name, (char *) nvp2->name);
+}
+
+static u8 *
+format_pmc_event (u8 * s, va_list * args)
+{
+ perfmon_intel_pmc_event_t *ev = va_arg (*args, perfmon_intel_pmc_event_t *);
+
+ s = format (s, "%s\n", ev->event_name);
+ s = format (s, " umask: 0x%x\n", ev->umask);
+ s = format (s, " code: 0x%x", ev->event_code[0]);
+
+ if (ev->event_code[1])
+ s = format (s, " , 0x%x\n", ev->event_code[1]);
+ else
+ s = format (s, "\n");
+
+ return s;
+}
+
+static u8 *
+format_processor_events (u8 * s, va_list * args)
+{
+ perfmon_main_t *pm = va_arg (*args, perfmon_main_t *);
+ int verbose = va_arg (*args, int);
+ sort_nvp_t *sort_nvps = 0;
+ sort_nvp_t *sn;
+ u8 *key;
+ u32 value;
+
+ /* *INDENT-OFF* */
+ hash_foreach_mem (key, value, pm->pmc_event_by_name,
+ ({
+ vec_add2 (sort_nvps, sn, 1);
+ sn->name = key;
+ sn->index = value;
+ }));
+
+ vec_sort_with_function (sort_nvps, sort_nvps_by_name);
+
+ if (verbose == 0)
+ {
+ vec_foreach (sn, sort_nvps)
+ s = format (s, "\n %s ", sn->name);
+ }
+ else
+ {
+ vec_foreach (sn, sort_nvps)
+ s = format(s, "%U", format_pmc_event, &pm->perfmon_table[sn->index]);
+ }
+ vec_free (sort_nvps);
+ return s;
+}
+
+
+static clib_error_t *
+show_pmc_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ perfmon_main_t *pm = &perfmon_main;
+ int verbose = 0;
+ int events = 0;
+ int i;
+ perfmon_capture_t *c;
+ perfmon_capture_t *captures = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "events"))
+ events = 1;
+ else if (unformat (input, "verbose"))
+ verbose = 1;
+ else
+ break;
+ }
+
+ if (events)
+ {
+ vlib_cli_output (vm, "Generic Events %U",
+ format_generic_events, verbose);
+ vlib_cli_output (vm, "Synthetic Events");
+ vlib_cli_output (vm, " instructions-per-clock");
+ vlib_cli_output (vm, " branch-mispredict-rate");
+ if (pm->perfmon_table)
+ vlib_cli_output (vm, "Processor Events %U",
+ format_processor_events, pm, verbose);
+ return 0;
+ }
+
+ if (pm->state == PERFMON_STATE_RUNNING)
+ {
+ vlib_cli_output (vm, "Data collection in progress...");
+ return 0;
+ }
+
+ if (pool_elts (pm->capture_pool) == 0)
+ {
+ vlib_cli_output (vm, "No data...");
+ return 0;
+ }
+
+ /* *INDENT-OFF* */
+ pool_foreach (c, pm->capture_pool)
+ {
+ vec_add1 (captures, *c);
+ }
+ /* *INDENT-ON* */
+
+ vec_sort_with_function (captures, capture_name_sort);
+
+ vlib_cli_output (vm, "%U", format_capture, pm, 0 /* header */ ,
+ 0 /* verbose */ );
+
+ for (i = 0; i < vec_len (captures); i++)
+ {
+ c = captures + i;
+
+ vlib_cli_output (vm, "%U", format_capture, pm, c, verbose);
+ }
+
+ vec_free (captures);
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_pmc_command, static) =
+{
+ .path = "show pmc",
+ .short_help = "show pmc [verbose]",
+ .function = show_pmc_command_fn,
+ .is_mp_safe = 1,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+clear_pmc_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ perfmon_main_t *pm = &perfmon_main;
+ u8 *key;
+ u32 *value;
+
+ if (pm->state == PERFMON_STATE_RUNNING)
+ {
+ vlib_cli_output (vm, "Performance monitor is still running...");
+ return 0;
+ }
+
+ pool_free (pm->capture_pool);
+
+ /* *INDENT-OFF* */
+ hash_foreach_mem (key, value, pm->capture_by_thread_and_node_name,
+ ({
+ vec_free (key);
+ }));
+ /* *INDENT-ON* */
+ hash_free (pm->capture_by_thread_and_node_name);
+ pm->capture_by_thread_and_node_name =
+ hash_create_string (0, sizeof (uword));
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (clear_pmc_command, static) =
+{
+ .path = "clear pmc",
+ .short_help = "clear the performance monitor counters",
+ .function = clear_pmc_command_fn,
+};
+/* *INDENT-ON* */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
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