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modules/media/magick: Add conf limit for CPU cycles of a running ImageMagick job.

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This commit is contained in:
Jason Volk 2019-06-29 17:30:59 -07:00
parent 55bc296068
commit 0def9bd5f1
1 changed files with 41 additions and 1 deletions
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42
modules/media/magick.cc
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@ -33,6 +33,7 @@ namespace ircd::magick
static void fini();
extern conf::item<uint64_t> limit_span;
extern conf::item<uint64_t> limit_cycles;
extern conf::item<uint64_t> yield_threshold;
extern conf::item<uint64_t> yield_interval;
extern log::log log;
@ -74,6 +75,13 @@ ircd::magick::limit_span
{ "default", 10000L },
};
decltype(ircd::magick::limit_cycles)
ircd::magick::limit_cycles
{
{ "name", "ircd.magick.limit.cycles" },
{ "default", 0L },
};
decltype(ircd::magick::yield_threshold)
ircd::magick::yield_threshold
{
@ -466,6 +474,8 @@ ircd::magick::call(function&& f,
namespace ircd::magick
{
static thread_local uint64_t job_ctr;
static thread_local uint64_t job_cycles;
static thread_local uint64_t last_cycles;
static thread_local int64_t last_quantum;
static thread_local uint64_t last_yield;
}
@ -477,12 +487,23 @@ ircd::magick::handle_progress(const char *text,
ExceptionInfo *ei)
noexcept try
{
// Sample the current reference cycle count first and once. This is an
// accumulated cycle count for only this ircd::ctx and the current slice,
// (all other cycles are not accumulated here) which is non-zero by now
// and monotonically increases across jobs as well.
const auto cur_cycles
{
cycles(ctx::cur()) + ctx::prof::cur_slice_cycles()
};
// This is a new job; reset any global state here
if(quantum == 0)
{
++job_ctr;
last_quantum = 0;
last_yield = 0;
job_cycles = 0;
last_cycles = cur_cycles;
// This job is too large based on the span measurement. This is an ad hoc
// measurement of the job size created internally by ImageMagick.
@ -496,18 +517,37 @@ noexcept try
};
}
// Update the cycle counters first so the log::debug has better info.
assert(cur_cycles >= last_cycles);
job_cycles += cur_cycles - last_cycles;
last_cycles = cur_cycles;
#ifdef IRCD_MAGICK_DEBUG_PROGRESS
log::debug
{
log, "job:%lu progress %2.2lf%% (%ld/%ld) :%s",
log, "job:%lu progress %2.2lf%% (%ld/%ld) cycles:%lu :%s",
job_ctr,
(quantum / double(span) * 100.0),
quantum,
span,
job_cycles,
text,
};
#endif
// Check if job exceeded its reference cycle limit if enabled.
if(unlikely(uint64_t(limit_cycles) && job_cycles > uint64_t(limit_cycles)))
throw error
{
"job:%lu CPU cycles:%lu exceeded server limit:%lu (progress %2.2lf%% (%ld/%ld))",
job_ctr,
job_cycles,
uint64_t(limit_cycles),
(quantum / double(span) * 100.0),
quantum,
span,
};
// This is a larger job; we yield this ircd::ctx at interval
if(span > uint64_t(yield_threshold))
{