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[PATCH] ppc64: Simplify counting of lpevents, remove lpevent_count from paca
Currently there's a per-cpu count of lpevents processed, a per-queue (ie. global) total count, and a count by event type. Replace all that with a count by event for each cpu. We only need to add it up int the proc code. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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@ -28,7 +28,9 @@
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*/
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struct hvlpevent_queue hvlpevent_queue __attribute__((__section__(".data")));
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static char *event_types[9] = {
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DEFINE_PER_CPU(unsigned long[HvLpEvent_Type_NumTypes], hvlpevent_counts);
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static char *event_types[HvLpEvent_Type_NumTypes] = {
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"Hypervisor\t\t",
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"Machine Facilities\t",
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"Session Manager\t",
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@ -129,7 +131,6 @@ static void hvlpevent_clear_valid( struct HvLpEvent * event )
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void process_hvlpevents(struct pt_regs *regs)
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{
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unsigned numIntsProcessed = 0;
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struct HvLpEvent * nextLpEvent;
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/* If we have recursed, just return */
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@ -144,8 +145,6 @@ void process_hvlpevents(struct pt_regs *regs)
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for (;;) {
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nextLpEvent = get_next_hvlpevent();
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if ( nextLpEvent ) {
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++numIntsProcessed;
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hvlpevent_queue.xLpIntCount++;
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/* Call appropriate handler here, passing
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* a pointer to the LpEvent. The handler
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* must make a copy of the LpEvent if it
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@ -160,7 +159,7 @@ void process_hvlpevents(struct pt_regs *regs)
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* here!
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*/
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if ( nextLpEvent->xType < HvLpEvent_Type_NumTypes )
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hvlpevent_queue.xLpIntCountByType[nextLpEvent->xType]++;
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__get_cpu_var(hvlpevent_counts)[nextLpEvent->xType]++;
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if ( nextLpEvent->xType < HvLpEvent_Type_NumTypes &&
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lpEventHandler[nextLpEvent->xType] )
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lpEventHandler[nextLpEvent->xType](nextLpEvent, regs);
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@ -181,8 +180,6 @@ void process_hvlpevents(struct pt_regs *regs)
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ItLpQueueInProcess = 0;
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mb();
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clear_inUse();
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get_paca()->lpevent_count += numIntsProcessed;
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}
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static int set_spread_lpevents(char *str)
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@ -228,20 +225,37 @@ void setup_hvlpevent_queue(void)
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static int proc_lpevents_show(struct seq_file *m, void *v)
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{
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unsigned int i;
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int cpu, i;
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unsigned long sum;
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static unsigned long cpu_totals[NR_CPUS];
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/* FIXME: do we care that there's no locking here? */
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sum = 0;
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for_each_online_cpu(cpu) {
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cpu_totals[cpu] = 0;
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for (i = 0; i < HvLpEvent_Type_NumTypes; i++) {
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cpu_totals[cpu] += per_cpu(hvlpevent_counts, cpu)[i];
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}
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sum += cpu_totals[cpu];
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}
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seq_printf(m, "LpEventQueue 0\n");
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seq_printf(m, " events processed:\t%lu\n",
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(unsigned long)hvlpevent_queue.xLpIntCount);
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seq_printf(m, " events processed:\t%lu\n", sum);
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for (i = 0; i < 9; ++i)
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seq_printf(m, " %s %10lu\n", event_types[i],
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(unsigned long)hvlpevent_queue.xLpIntCountByType[i]);
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for (i = 0; i < HvLpEvent_Type_NumTypes; ++i) {
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sum = 0;
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for_each_online_cpu(cpu) {
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sum += per_cpu(hvlpevent_counts, cpu)[i];
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}
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seq_printf(m, " %s %10lu\n", event_types[i], sum);
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}
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seq_printf(m, "\n events processed by processor:\n");
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for_each_online_cpu(i)
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seq_printf(m, " CPU%02d %10u\n", i, paca[i].lpevent_count);
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for_each_online_cpu(cpu) {
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seq_printf(m, " CPU%02d %10lu\n", cpu, cpu_totals[cpu]);
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}
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return 0;
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}
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@ -70,8 +70,6 @@ struct hvlpevent_queue {
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u8 xIndex; // 0x28 unique sequential index.
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u8 xSlicRsvd[3]; // 0x29-2b
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u32 xInUseWord; // 0x2C
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u64 xLpIntCount; // 0x30 Total Lp Int msgs processed
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u64 xLpIntCountByType[9]; // 0x38-0x7F Event counts by type
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};
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extern struct hvlpevent_queue hvlpevent_queue;
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@ -89,7 +89,6 @@ struct paca_struct {
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u64 next_jiffy_update_tb; /* TB value for next jiffy update */
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u64 saved_r1; /* r1 save for RTAS calls */
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u64 saved_msr; /* MSR saved here by enter_rtas */
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u32 lpevent_count; /* lpevents processed */
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u8 proc_enabled; /* irq soft-enable flag */
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/* not yet used */
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