trey/psi-by-example
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Set tracking window to 5s, rearranged code so it's alphabetical (IO before MEM)

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Trey Blancher 2023-08-31 22:53:49 -04:00
parent 08c476910f
commit e09aacd35f
1 changed files with 14 additions and 13 deletions
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27
monitor.c
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@ -6,9 +6,9 @@
#include <unistd.h> #include <unistd.h>
#include <string.h> #include <string.h>
#define CPU_TRACKING_WINDOW_SECS 1 #define CPU_TRACKING_WINDOW_SECS 5
#define IO_TRACKING_WINDOW_SECS 1 #define IO_TRACKING_WINDOW_SECS 5
#define MEM_TRACKING_WINDOW_SECS 1 #define MEM_TRACKING_WINDOW_SECS 5
#define CPU_TRIGGER_THRESHOLD_MS 1000 #define CPU_TRIGGER_THRESHOLD_MS 1000
#define IO_TRIGGER_THRESHOLD_MS 1000 #define IO_TRIGGER_THRESHOLD_MS 1000
#define MEM_TRIGGER_THRESHOLD_MS 1000 #define MEM_TRIGGER_THRESHOLD_MS 1000
@ -51,12 +51,13 @@ void setup_polling() {
fds[FD_IO_IDX].fd = open(IO_PRESSURE_FILE, O_RDWR | O_NONBLOCK); fds[FD_IO_IDX].fd = open(IO_PRESSURE_FILE, O_RDWR | O_NONBLOCK);
if (fds[FD_IO_IDX].fd < 0) if (fds[FD_IO_IDX].fd < 0)
fatal_error("open(): " IO_PRESSURE_FILE); fatal_error("open(): " IO_PRESSURE_FILE);
/* Let's setup our MEM PSI trigger */ /* Let's setup our MEM PSI trigger */
fds[FD_MEM_IDX].fd = open(MEM_PRESSURE_FILE, O_RDWR | O_NONBLOCK); fds[FD_MEM_IDX].fd = open(MEM_PRESSURE_FILE, O_RDWR | O_NONBLOCK);
if (fds[FD_MEM_IDX].fd < 0) if (fds[FD_MEM_IDX].fd < 0)
fatal_error("open(): " MEM_PRESSURE_FILE); fatal_error("open(): " MEM_PRESSURE_FILE);
fds[FD_CPU_IDX].events = fds[FD_MEM_IDX].events = fds[FD_IO_IDX].events = POLLPRI; fds[FD_CPU_IDX].events = fds[FD_IO_IDX].events = fds[FD_MEM_IDX].events = POLLPRI;
char trigger[128]; char trigger[128];
@ -66,17 +67,17 @@ void setup_polling() {
if (write(fds[FD_CPU_IDX].fd, trigger, strlen(trigger) + 1) < 0) if (write(fds[FD_CPU_IDX].fd, trigger, strlen(trigger) + 1) < 0)
fatal_error("write(): " CPU_PRESSURE_FILE); fatal_error("write(): " CPU_PRESSURE_FILE);
snprintf(trigger, 128, "some %d %d", MEM_TRIGGER_THRESHOLD_MS * 1000, MEM_TRACKING_WINDOW_SECS * 1000000);
printf("Trigger: %s\n", trigger);
fflush(stdout);
if (write(fds[FD_MEM_IDX].fd, trigger, strlen(trigger) + 1) < 0)
fatal_error("write(): " MEM_PRESSURE_FILE);
snprintf(trigger, 128, "some %d %d", IO_TRIGGER_THRESHOLD_MS * 1000, IO_TRACKING_WINDOW_SECS * 1000000); snprintf(trigger, 128, "some %d %d", IO_TRIGGER_THRESHOLD_MS * 1000, IO_TRACKING_WINDOW_SECS * 1000000);
printf("Trigger: %s\n", trigger); printf("Trigger: %s\n", trigger);
fflush(stdout); fflush(stdout);
if (write(fds[FD_IO_IDX].fd, trigger, strlen(trigger) + 1) < 0) if (write(fds[FD_IO_IDX].fd, trigger, strlen(trigger) + 1) < 0)
fatal_error("write(): " IO_PRESSURE_FILE); fatal_error("write(): " IO_PRESSURE_FILE);
snprintf(trigger, 128, "some %d %d", MEM_TRIGGER_THRESHOLD_MS * 1000, MEM_TRACKING_WINDOW_SECS * 1000000);
printf("Trigger: %s\n", trigger);
fflush(stdout);
if (write(fds[FD_MEM_IDX].fd, trigger, strlen(trigger) + 1) < 0)
fatal_error("write(): " MEM_PRESSURE_FILE);
} }
@ -114,12 +115,12 @@ void wait_for_notification() {
printf("CPU PSI event %d triggered.\n", cpu_event_counter++); printf("CPU PSI event %d triggered.\n", cpu_event_counter++);
fflush(stdout); fflush(stdout);
} }
else if (i == FD_MEM_IDX) { else if (i == FD_IO_IDX) {
printf("MEM PSI event %d triggered.\n", mem_event_counter++); printf("IO PSI event %d triggered.\n", mem_event_counter++);
fflush(stdout); fflush(stdout);
} }
else { else {
printf("IO PSI event %d triggered.\n", io_event_counter++); printf("MEM PSI event %d triggered.\n", io_event_counter++);
fflush(stdout); fflush(stdout);
} }
} else { } else {