git: 3adde0e55d7c - main - pmc: pmc info command

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=3adde0e55d7c01018b0877e1407aede7e757ce04

commit 3adde0e55d7c01018b0877e1407aede7e757ce04
Author:     Ali Mashtizadeh <ali@mashtizadeh.com>
AuthorDate: 2026-07-28 17:46:41 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2026-07-28 19:27:45 +0000

    pmc: pmc info command
    
    Prints the log header including machine, cpu and kernel details along
    with what counters were selected.
    
    Sponsored by: Netflix
    Reviewed by:    adrian, imp
    Differential Revision:  https://reviews.freebsd.org/D57778
---
 usr.sbin/pmc/cmd_pmc_info.cc | 186 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 186 insertions(+)

diff --git a/usr.sbin/pmc/cmd_pmc_info.cc b/usr.sbin/pmc/cmd_pmc_info.cc
new file mode 100644
index 000000000000..4bff0240b774
--- /dev/null
+++ b/usr.sbin/pmc/cmd_pmc_info.cc
@@ -0,0 +1,186 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2026, Netflix, Inc.
+ *
+ * This software was developed by Ali Mashtizadeh under the sponsorship from
+ * Netflix, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/cpuset.h>
+#include <sys/event.h>
+#include <sys/queue.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/sysctl.h>
+#include <sys/time.h>
+#include <sys/ttycom.h>
+#include <sys/user.h>
+#include <sys/wait.h>
+
+#include <assert.h>
+#include <curses.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <kvm.h>
+#include <libgen.h>
+#include <limits.h>
+#include <locale.h>
+#include <math.h>
+#include <pmc.h>
+#include <pmclog.h>
+#include <regex.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+#include "cmd_pmc.h"
+
+#include <iostream>
+#include <map>
+#include <set>
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+#include "display.hh"
+#include "view.hh"
+
+class info_view : public pmcview
+{
+public:
+	virtual void
+	callchain(struct pmclog_ev_callchain &p)
+	{
+		uint64_t eventid = pmcidtoeventid(p.pl_pmcid);
+
+		pmcinfo[eventid].count++;
+	}
+
+	virtual void
+	print()
+	{
+		title("PMC Info");
+
+		header("System Info");
+		printf("CPU Model: %s\n", cpumodel.c_str());
+		printf("OS Release: %s\n", osrelease.c_str());
+		printf("Build ID: %s\n", buildid.c_str());
+		printf("\n");
+
+		if (arch  == PMC_ARCH_AMD64) {
+			header("CPUID");
+			for (auto &c : cpuid)
+				printf("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
+				    c.first, c.second.eax, c.second.ebx,
+				    c.second.ecx, c.second.edx);
+			printf("\n");
+		}
+    
+		header("PMC Info");
+		for (auto &p : extpmcinfo)
+			printf("%s\n", p.event.c_str());
+		printf("\n");
+
+		table t = table();
+		t.addcolumn("Counter", true);
+		t.addcolumn("Counts", true);
+
+		for (auto &p : pmcinfo) {
+			std::vector<field> r;
+
+			r.emplace_back(p.second.name);
+			r.emplace_back((int64_t)p.second.count);
+
+			t.addrow(r);
+		}
+
+		t.print();
+	}
+};
+
+static struct option longopts[] = {
+	PMCFILTER_LOPTS,
+	{ NULL,		0,			NULL,	0 }
+};
+
+static void
+usage(void)
+{
+	printf("Usage: pmc info [options] [pmclog]\n\n");
+	printf("Display a log summary\n\n");
+	printf("Options:\n");
+	PMCFILTER_PRINTOPTS();
+}
+
+int
+cmd_pmc_info(int argc, char **argv)
+{
+	struct pmcfilter filter = pmcfilter();
+	const char *logfile = "default.log";
+	int option, logfd;
+
+	while ((option = getopt_long(argc, argv, PMCFILTER_SOPTS "s:", longopts, NULL)) != -1) {
+		switch (option) {
+		PMCFILTER_CASE(filter);
+		case '?':
+		default:
+			usage();
+		}
+	}
+	argc -= optind;
+	argv += optind;
+	if (argc != 0 && argc != 1) {
+		usage();
+		exit(EX_USAGE);
+	}
+	if (argc == 1)
+		logfile = argv[0];
+
+	setup_screen();
+
+	if ((logfd = open(logfile, O_RDONLY)) < 0) {
+		errx(EX_OSERR, "ERROR: Cannot open \"%s\" for reading: %s.", logfile,
+		    strerror(errno));
+		return (EX_NOINPUT);
+	}
+
+	info_view s = info_view();
+	s.setfilter(filter);
+	s.process(logfd);
+	s.print();
+
+	return (EX_OK);
+}