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Diffstat (limited to 'Examples/php_flowtime_example.txt')
-rw-r--r-- | Examples/php_flowtime_example.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Examples/php_flowtime_example.txt b/Examples/php_flowtime_example.txt new file mode 100644 index 000000000000..57eb69c6dc64 --- /dev/null +++ b/Examples/php_flowtime_example.txt @@ -0,0 +1,41 @@ +The following are examples of php_flowtime.d. + +This is a simple script to trace the flow of PHP functions. +Here it traces the example program, Code/Php/func_abc.php + +# php_flowtime.d + C TIME(us) FILE DELTA(us) -- FUNC + 0 3646108339057 func_abc.php 9 -> func_a + 0 3646108339090 func_abc.php 32 -> sleep + 0 3646109341043 func_abc.php 1001953 <- sleep + 0 3646109341074 func_abc.php 31 -> func_b + 0 3646109341098 func_abc.php 23 -> sleep + 0 3646110350712 func_abc.php 1009614 <- sleep + 0 3646110350745 func_abc.php 32 -> func_c + 0 3646110350768 func_abc.php 23 -> sleep + 0 3646111362323 func_abc.php 1011554 <- sleep + 0 3646111362351 func_abc.php 27 <- func_c + 0 3646111362361 func_abc.php 10 <- func_b + 0 3646111362370 func_abc.php 9 <- func_a +^C + +The fifth column is indented by 2 spaces to show when a new function begins. +This shows which function is calling which - the output above begins by +showing that func_a() began; slept, and returned from sleep; and then called +func_b(). + +The TIME(us) column shows time since boot. + +The DELTA(us) column shows time from that line to the previous line, and +so can be a bit tricky to read. For example, the second line of data output +(skipping the header) reads as "the time from func_a() beginning to +calling the sleep function beginning was 32 microseconds". + +The FILE column shows file that was being executed. + +If the output looks shuffled, check the CPU "C" and "TIME" columns, and +post sort based on TIME if necessary. + +See Notes/ALLflow_notes.txt for important notes about reading flow outputs. + + |