It would be handy to have cmdline in turbostat output. For example,
according to the turbostat output, there are no C-states requested.
In this case the user is very curious if something like
intel_idle.max_cstate=0 was used, or may be idle=none too. It is
also curious whether things like intel_pstate=nohwp were used.
Print the boot command line accordingly:
turbostat version 21.05.04 - Len Brown <[email protected]>
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.16.0+ root=UUID=
b42359ed-1e05-42eb-8757-6bf2a1c19070 ro quiet splash vt.handoff=7
Suggested-by: Artem Bityutskiy <[email protected]>
Signed-off-by: Chen Yu <[email protected]>
---
tools/power/x86/turbostat/turbostat.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index bc5ae0872fed..bfcb6345510b 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -5976,6 +5976,29 @@ void print_version()
fprintf(outf, "turbostat version 21.05.04" " - Len Brown <[email protected]>\n");
}
+#define COMMAND_LINE_SIZE 2048
+
+void print_bootcmd(void)
+{
+ char bootcmd[COMMAND_LINE_SIZE];
+ FILE *fp;
+ int ret;
+
+ memset(bootcmd, 0, COMMAND_LINE_SIZE);
+ fp = fopen("/proc/cmdline", "r");
+ if (!fp)
+ return;
+
+ ret = fread(bootcmd, sizeof(char), COMMAND_LINE_SIZE - 1, fp);
+ if (ret) {
+ bootcmd[ret] = '\0';
+ /* the last character is already '\n' */
+ fprintf(outf, "Kernel command line: %s", bootcmd);
+ }
+
+ fclose(fp);
+}
+
int add_counter(unsigned int msr_num, char *path, char *name,
unsigned int width, enum counter_scope scope,
enum counter_type type, enum counter_format format, int flags)
@@ -6425,8 +6448,10 @@ int main(int argc, char **argv)
outf = stderr;
cmdline(argc, argv);
- if (!quiet)
+ if (!quiet) {
print_version();
+ print_bootcmd();
+ }
probe_sysfs();
--
2.25.1