[PATCH 4/4] getdelays: show max CPU/IO/SWAP/RECLAIM delays

[Satoru Moriya]

With this patch, getdelays shows maximum delay which it gets from kernel
via taskstats interface.

Output example:
(on 100 concurrent dd reading sparse files with 1 dd writing a file)

CPU             count     real total  virtual total    delay total      delay_max  delay average
                  234       61990576       78703354         543649         138417          0.002ms
IO              count    delay total      delay max  delay average
                   16      184774999       61259321             11ms
SWAP            count    delay total      delay max  delay average
                    0              0              0              0ms
RECLAIM         count    delay total      delay_max  delay average
                   20        4249456         381288              0ms


Signed-off-by: Satoru Moriya <satoru.moriya@xxxxxxx>
---
 Documentation/accounting/getdelays.c |   28 ++++++++++++++++------------
 1 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c
index f6318f6..69d3ec4 100644
--- a/Documentation/accounting/getdelays.c
+++ b/Documentation/accounting/getdelays.c
@@ -197,32 +197,36 @@ static int get_family_id(int sd)
 
 static void print_delayacct(struct taskstats *t)
 {
-	printf("\n\nCPU   %15s%15s%15s%15s%15s\n"
-	       "      %15llu%15llu%15llu%15llu%15.3fms\n"
-	       "IO    %15s%15s%15s\n"
-	       "      %15llu%15llu%15llums\n"
-	       "SWAP  %15s%15s%15s\n"
-	       "      %15llu%15llu%15llums\n"
-	       "RECLAIM  %12s%15s%15s\n"
-	       "      %15llu%15llu%15llums\n",
+	printf("\n\nCPU   %15s%15s%15s%15s%15s%15s\n"
+	       "      %15llu%15llu%15llu%15llu%15llu%15.3fms\n"
+	       "IO    %15s%15s%15s%15s\n"
+	       "      %15llu%15llu%15llu%15llums\n"
+	       "SWAP  %15s%15s%15s%15s\n"
+	       "      %15llu%15llu%15llu%15llums\n"
+	       "RECLAIM  %12s%15s%15s%15s\n"
+	       "      %15llu%15llu%15llu%15llums\n",
 	       "count", "real total", "virtual total",
-	       "delay total", "delay average",
+	       "delay total", "delay_max", "delay average",
 	       (unsigned long long)t->cpu_count,
 	       (unsigned long long)t->cpu_run_real_total,
 	       (unsigned long long)t->cpu_run_virtual_total,
 	       (unsigned long long)t->cpu_delay_total,
+	       (unsigned long long)t->cpu_delay_max,
 	       average_ms((double)t->cpu_delay_total, t->cpu_count),
-	       "count", "delay total", "delay average",
+	       "count", "delay total", "delay max", "delay average",
 	       (unsigned long long)t->blkio_count,
 	       (unsigned long long)t->blkio_delay_total,
+	       (unsigned long long)t->blkio_delay_max,
 	       average_ms(t->blkio_delay_total, t->blkio_count),
-	       "count", "delay total", "delay average",
+	       "count", "delay total", "delay max", "delay average",
 	       (unsigned long long)t->swapin_count,
 	       (unsigned long long)t->swapin_delay_total,
+	       (unsigned long long)t->swapin_delay_max,
 	       average_ms(t->swapin_delay_total, t->swapin_count),
-	       "count", "delay total", "delay average",
+	       "count", "delay total", "delay_max", "delay average",
 	       (unsigned long long)t->freepages_count,
 	       (unsigned long long)t->freepages_delay_total,
+	       (unsigned long long)t->freepages_delay_max,
 	       average_ms(t->freepages_delay_total, t->freepages_count));
 }
 
-- 
1.7.6.4


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